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| <H1>GNU History Library</H1></P><P> |
| |
| This document describes the GNU History library, a programming tool that |
| provides a consistent user interface for recalling lines of previously |
| typed input. |
| </P><P> |
| |
| <BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC1">1. Using History Interactively</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">GNU History User's Manual.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC6">2. Programming with GNU History</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">GNU History Programmer's Manual.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC19">A. Copying This Manual</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP"></TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC22">B. Concept Index</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Index of concepts described in this manual.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC23">C. Function and Variable Index</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Index of externally visible functions |
| and variables.</TD></TR> |
| </TABLE></BLOCKQUOTE> |
| <P> |
| |
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| <A NAME="SEC1"></A> |
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| <A NAME="Using History Interactively"></A> |
| <H1> 1. Using History Interactively </H1> |
| <!--docid::SEC1::--> |
| <P> |
| |
| This chapter describes how to use the GNU History Library interactively, |
| from a user's standpoint. It should be considered a user's guide. For |
| information on using the GNU History Library in your own programs, |
| see section <A HREF="history.html#SEC6">2. Programming with GNU History</A>. |
| </P><P> |
| |
| <BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC2">1.1 History Expansion</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">What it feels like using History as a user.</TD></TR> |
| </TABLE></BLOCKQUOTE> |
| <P> |
| |
| <A NAME="History Interaction"></A> |
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| <H2> 1.1 History Expansion </H2> |
| <!--docid::SEC2::--> |
| <P> |
| |
| The History library provides a history expansion feature that is similar |
| to the history expansion provided by <CODE>csh</CODE>. This section |
| describes the syntax used to manipulate the history information. |
| </P><P> |
| |
| History expansions introduce words from the history list into |
| the input stream, making it easy to repeat commands, insert the |
| arguments to a previous command into the current input line, or |
| fix errors in previous commands quickly. |
| </P><P> |
| |
| History expansion takes place in two parts. The first is to determine |
| which line from the history list should be used during substitution. |
| The second is to select portions of that line for inclusion into the |
| current one. The line selected from the history is called the |
| <EM>event</EM>, and the portions of that line that are acted upon are |
| called <EM>words</EM>. Various <EM>modifiers</EM> are available to manipulate |
| the selected words. The line is broken into words in the same fashion |
| that Bash does, so that several words |
| surrounded by quotes are considered one word. |
| History expansions are introduced by the appearance of the |
| history expansion character, which is <SAMP>`!'</SAMP> by default. |
| </P><P> |
| |
| <BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC3">1.1.1 Event Designators</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">How to specify which history line to use.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC4">1.1.2 Word Designators</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Specifying which words are of interest.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC5">1.1.3 Modifiers</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Modifying the results of substitution.</TD></TR> |
| </TABLE></BLOCKQUOTE> |
| <P> |
| |
| <A NAME="Event Designators"></A> |
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| </TR></TABLE> |
| <H3> 1.1.1 Event Designators </H3> |
| <!--docid::SEC3::--> |
| <P> |
| |
| An event designator is a reference to a command line entry in the |
| history list. |
| <A NAME="IDX1"></A> |
| </P><P> |
| |
| <DL COMPACT> |
| |
| <DT><CODE>!</CODE> |
| <DD>Start a history substitution, except when followed by a space, tab, |
| the end of the line, or <SAMP>`='</SAMP>. |
| <P> |
| |
| <DT><CODE>!<VAR>n</VAR></CODE> |
| <DD>Refer to command line <VAR>n</VAR>. |
| <P> |
| |
| <DT><CODE>!-<VAR>n</VAR></CODE> |
| <DD>Refer to the command <VAR>n</VAR> lines back. |
| <P> |
| |
| <DT><CODE>!!</CODE> |
| <DD>Refer to the previous command. This is a synonym for <SAMP>`!-1'</SAMP>. |
| <P> |
| |
| <DT><CODE>!<VAR>string</VAR></CODE> |
| <DD>Refer to the most recent command starting with <VAR>string</VAR>. |
| <P> |
| |
| <DT><CODE>!?<VAR>string</VAR>[?]</CODE> |
| <DD>Refer to the most recent command containing <VAR>string</VAR>. The trailing |
| <SAMP>`?'</SAMP> may be omitted if the <VAR>string</VAR> is followed immediately by |
| a newline. |
| <P> |
| |
| <DT><CODE>^<VAR>string1</VAR>^<VAR>string2</VAR>^</CODE> |
| <DD>Quick Substitution. Repeat the last command, replacing <VAR>string1</VAR> |
| with <VAR>string2</VAR>. Equivalent to |
| <CODE>!!:s/<VAR>string1</VAR>/<VAR>string2</VAR>/</CODE>. |
| <P> |
| |
| <DT><CODE>!#</CODE> |
| <DD>The entire command line typed so far. |
| <P> |
| |
| </DL> |
| <P> |
| |
| <A NAME="Word Designators"></A> |
| <HR SIZE="6"> |
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| </TR></TABLE> |
| <H3> 1.1.2 Word Designators </H3> |
| <!--docid::SEC4::--> |
| <P> |
| |
| Word designators are used to select desired words from the event. |
| A <SAMP>`:'</SAMP> separates the event specification from the word designator. It |
| may be omitted if the word designator begins with a <SAMP>`^'</SAMP>, <SAMP>`$'</SAMP>, |
| <SAMP>`*'</SAMP>, <SAMP>`-'</SAMP>, or <SAMP>`%'</SAMP>. Words are numbered from the beginning |
| of the line, with the first word being denoted by 0 (zero). Words are |
| inserted into the current line separated by single spaces. |
| </P><P> |
| |
| For example, |
| </P><P> |
| |
| <DL COMPACT> |
| <DT><CODE>!!</CODE> |
| <DD>designates the preceding command. When you type this, the preceding |
| command is repeated in toto. |
| <P> |
| |
| <DT><CODE>!!:$</CODE> |
| <DD>designates the last argument of the preceding command. This may be |
| shortened to <CODE>!$</CODE>. |
| <P> |
| |
| <DT><CODE>!fi:2</CODE> |
| <DD>designates the second argument of the most recent command starting with |
| the letters <CODE>fi</CODE>. |
| </DL> |
| <P> |
| |
| Here are the word designators: |
| |
| <DL COMPACT> |
| |
| <DT><CODE>0 (zero)</CODE> |
| <DD>The <CODE>0</CODE>th word. For many applications, this is the command word. |
| <P> |
| |
| <DT><CODE><VAR>n</VAR></CODE> |
| <DD>The <VAR>n</VAR>th word. |
| <P> |
| |
| <DT><CODE>^</CODE> |
| <DD>The first argument; that is, word 1. |
| <P> |
| |
| <DT><CODE>$</CODE> |
| <DD>The last argument. |
| <P> |
| |
| <DT><CODE>%</CODE> |
| <DD>The word matched by the most recent <SAMP>`?<VAR>string</VAR>?'</SAMP> search. |
| <P> |
| |
| <DT><CODE><VAR>x</VAR>-<VAR>y</VAR></CODE> |
| <DD>A range of words; <SAMP>`-<VAR>y</VAR>'</SAMP> abbreviates <SAMP>`0-<VAR>y</VAR>'</SAMP>. |
| <P> |
| |
| <DT><CODE>*</CODE> |
| <DD>All of the words, except the <CODE>0</CODE>th. This is a synonym for <SAMP>`1-$'</SAMP>. |
| It is not an error to use <SAMP>`*'</SAMP> if there is just one word in the event; |
| the empty string is returned in that case. |
| <P> |
| |
| <DT><CODE><VAR>x</VAR>*</CODE> |
| <DD>Abbreviates <SAMP>`<VAR>x</VAR>-$'</SAMP> |
| <P> |
| |
| <DT><CODE><VAR>x</VAR>-</CODE> |
| <DD>Abbreviates <SAMP>`<VAR>x</VAR>-$'</SAMP> like <SAMP>`<VAR>x</VAR>*'</SAMP>, but omits the last word. |
| <P> |
| |
| </DL> |
| <P> |
| |
| If a word designator is supplied without an event specification, the |
| previous command is used as the event. |
| </P><P> |
| |
| <A NAME="Modifiers"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC5"></A> |
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| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 1.1.3 Modifiers </H3> |
| <!--docid::SEC5::--> |
| <P> |
| |
| After the optional word designator, you can add a sequence of one or more |
| of the following modifiers, each preceded by a <SAMP>`:'</SAMP>. |
| </P><P> |
| |
| <DL COMPACT> |
| |
| <DT><CODE>h</CODE> |
| <DD>Remove a trailing pathname component, leaving only the head. |
| <P> |
| |
| <DT><CODE>t</CODE> |
| <DD>Remove all leading pathname components, leaving the tail. |
| <P> |
| |
| <DT><CODE>r</CODE> |
| <DD>Remove a trailing suffix of the form <SAMP>`.<VAR>suffix</VAR>'</SAMP>, leaving |
| the basename. |
| <P> |
| |
| <DT><CODE>e</CODE> |
| <DD>Remove all but the trailing suffix. |
| <P> |
| |
| <DT><CODE>p</CODE> |
| <DD>Print the new command but do not execute it. |
| <P> |
| |
| <DT><CODE>s/<VAR>old</VAR>/<VAR>new</VAR>/</CODE> |
| <DD>Substitute <VAR>new</VAR> for the first occurrence of <VAR>old</VAR> in the |
| event line. Any delimiter may be used in place of <SAMP>`/'</SAMP>. |
| The delimiter may be quoted in <VAR>old</VAR> and <VAR>new</VAR> |
| with a single backslash. If <SAMP>`&'</SAMP> appears in <VAR>new</VAR>, |
| it is replaced by <VAR>old</VAR>. A single backslash will quote |
| the <SAMP>`&'</SAMP>. The final delimiter is optional if it is the last |
| character on the input line. |
| <P> |
| |
| <DT><CODE>&</CODE> |
| <DD>Repeat the previous substitution. |
| <P> |
| |
| <DT><CODE>g</CODE> |
| <DD><DT><CODE>a</CODE> |
| <DD>Cause changes to be applied over the entire event line. Used in |
| conjunction with <SAMP>`s'</SAMP>, as in <CODE>gs/<VAR>old</VAR>/<VAR>new</VAR>/</CODE>, |
| or with <SAMP>`&'</SAMP>. |
| <P> |
| |
| <DT><CODE>G</CODE> |
| <DD>Apply the following <SAMP>`s'</SAMP> modifier once to each word in the event. |
| <P> |
| |
| </DL> |
| <P> |
| |
| <A NAME="Programming with GNU History"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC6"></A> |
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| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H1> 2. Programming with GNU History </H1> |
| <!--docid::SEC6::--> |
| <P> |
| |
| This chapter describes how to interface programs that you write |
| with the GNU History Library. |
| It should be considered a technical guide. |
| For information on the interactive use of GNU History, see section <A HREF="history.html#SEC1">1. Using History Interactively</A>. |
| </P><P> |
| |
| <BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC7">2.1 Introduction to History</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">What is the GNU History library for?</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC8">2.2 History Storage</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">How information is stored.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC9">2.3 History Functions</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions that you can use.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC17">2.4 History Variables</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Variables that control behaviour.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC18">2.5 History Programming Example</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Example of using the GNU History Library.</TD></TR> |
| </TABLE></BLOCKQUOTE> |
| <P> |
| |
| <A NAME="Introduction to History"></A> |
| <HR SIZE="6"> |
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| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H2> 2.1 Introduction to History </H2> |
| <!--docid::SEC7::--> |
| <P> |
| |
| Many programs read input from the user a line at a time. The GNU |
| History library is able to keep track of those lines, associate arbitrary |
| data with each line, and utilize information from previous lines in |
| composing new ones. |
| </P><P> |
| |
| The programmer using the History library has available functions |
| for remembering lines on a history list, associating arbitrary data |
| with a line, removing lines from the list, searching through the list |
| for a line containing an arbitrary text string, and referencing any line |
| in the list directly. In addition, a history <EM>expansion</EM> function |
| is available which provides for a consistent user interface across |
| different programs. |
| </P><P> |
| |
| The user using programs written with the History library has the |
| benefit of a consistent user interface with a set of well-known |
| commands for manipulating the text of previous lines and using that text |
| in new commands. The basic history manipulation commands are similar to |
| the history substitution provided by <CODE>csh</CODE>. |
| </P><P> |
| |
| If the programmer desires, he can use the Readline library, which |
| includes some history manipulation by default, and has the added |
| advantage of command line editing. |
| </P><P> |
| |
| Before declaring any functions using any functionality the History |
| library provides in other code, an application writer should include |
| the file <CODE><readline/history.h></CODE> in any file that uses the |
| History library's features. It supplies extern declarations for all |
| of the library's public functions and variables, and declares all of |
| the public data structures. |
| </P><P> |
| |
| <A NAME="History Storage"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC8"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC7"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC6"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H2> 2.2 History Storage </H2> |
| <!--docid::SEC8::--> |
| <P> |
| |
| The history list is an array of history entries. A history entry is |
| declared as follows: |
| </P><P> |
| |
| <TABLE><tr><td> </td><td class=example><pre>typedef void *histdata_t; |
| |
| typedef struct _hist_entry { |
| char *line; |
| char *timestamp; |
| histdata_t data; |
| } HIST_ENTRY; |
| </pre></td></tr></table></P><P> |
| |
| The history list itself might therefore be declared as |
| </P><P> |
| |
| <TABLE><tr><td> </td><td class=example><pre>HIST_ENTRY **the_history_list; |
| </pre></td></tr></table></P><P> |
| |
| The state of the History library is encapsulated into a single structure: |
| </P><P> |
| |
| <TABLE><tr><td> </td><td class=example><pre>/* |
| * A structure used to pass around the current state of the history. |
| */ |
| typedef struct _hist_state { |
| HIST_ENTRY **entries; /* Pointer to the entries themselves. */ |
| int offset; /* The location pointer within this array. */ |
| int length; /* Number of elements within this array. */ |
| int size; /* Number of slots allocated to this array. */ |
| int flags; |
| } HISTORY_STATE; |
| </pre></td></tr></table></P><P> |
| |
| If the flags member includes <CODE>HS_STIFLED</CODE>, the history has been |
| stifled. |
| </P><P> |
| |
| <A NAME="History Functions"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC9"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC8"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC10"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC6"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H2> 2.3 History Functions </H2> |
| <!--docid::SEC9::--> |
| <P> |
| |
| This section describes the calling sequence for the various functions |
| exported by the GNU History library. |
| </P><P> |
| |
| <BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC10">2.3.1 Initializing History and State Management</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions to call when you |
| want to use history in a |
| program.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions used to manage the list |
| of history entries.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC12">2.3.3 Information About the History List</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions returning information about |
| the history list.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC13">2.3.4 Moving Around the History List</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions used to change the position |
| in the history list.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC14">2.3.5 Searching the History List</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions to search the history list |
| for entries containing a string.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC15">2.3.6 Managing the History File</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions that read and write a file |
| containing the history list.</TD></TR> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC16">2.3.7 History Expansion</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">Functions to perform csh-like history |
| expansion.</TD></TR> |
| </TABLE></BLOCKQUOTE> |
| <P> |
| |
| <A NAME="Initializing History and State Management"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC10"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC11"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 2.3.1 Initializing History and State Management </H3> |
| <!--docid::SEC10::--> |
| <P> |
| |
| This section describes functions used to initialize and manage |
| the state of the History library when you want to use the history |
| functions in your program. |
| </P><P> |
| |
| <A NAME="IDX2"></A> |
| <DL> |
| <DT><U>Function:</U> void <B>using_history</B> <I>(void)</I> |
| <DD>Begin a session in which the history functions might be used. This |
| initializes the interactive variables. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX3"></A> |
| <DL> |
| <DT><U>Function:</U> HISTORY_STATE * <B>history_get_history_state</B> <I>(void)</I> |
| <DD>Return a structure describing the current state of the input history. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX4"></A> |
| <DL> |
| <DT><U>Function:</U> void <B>history_set_history_state</B> <I>(HISTORY_STATE *state)</I> |
| <DD>Set the state of the history list according to <VAR>state</VAR>. |
| </DL> |
| </P><P> |
| |
| <A NAME="History List Management"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC11"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC10"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC12"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC12"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 2.3.2 History List Management </H3> |
| <!--docid::SEC11::--> |
| <P> |
| |
| These functions manage individual entries on the history list, or set |
| parameters managing the list itself. |
| </P><P> |
| |
| <A NAME="IDX5"></A> |
| <DL> |
| <DT><U>Function:</U> void <B>add_history</B> <I>(const char *string)</I> |
| <DD>Place <VAR>string</VAR> at the end of the history list. The associated data |
| field (if any) is set to <CODE>NULL</CODE>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX6"></A> |
| <DL> |
| <DT><U>Function:</U> void <B>add_history_time</B> <I>(const char *string)</I> |
| <DD>Change the time stamp associated with the most recent history entry to |
| <VAR>string</VAR>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX7"></A> |
| <DL> |
| <DT><U>Function:</U> HIST_ENTRY * <B>remove_history</B> <I>(int which)</I> |
| <DD>Remove history entry at offset <VAR>which</VAR> from the history. The |
| removed element is returned so you can free the line, data, |
| and containing structure. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX8"></A> |
| <DL> |
| <DT><U>Function:</U> histdata_t <B>free_history_entry</B> <I>(HIST_ENTRY *histent)</I> |
| <DD>Free the history entry <VAR>histent</VAR> and any history library private |
| data associated with it. Returns the application-specific data |
| so the caller can dispose of it. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX9"></A> |
| <DL> |
| <DT><U>Function:</U> HIST_ENTRY * <B>replace_history_entry</B> <I>(int which, const char *line, histdata_t data)</I> |
| <DD>Make the history entry at offset <VAR>which</VAR> have <VAR>line</VAR> and <VAR>data</VAR>. |
| This returns the old entry so the caller can dispose of any |
| application-specific data. In the case |
| of an invalid <VAR>which</VAR>, a <CODE>NULL</CODE> pointer is returned. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX10"></A> |
| <DL> |
| <DT><U>Function:</U> void <B>clear_history</B> <I>(void)</I> |
| <DD>Clear the history list by deleting all the entries. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX11"></A> |
| <DL> |
| <DT><U>Function:</U> void <B>stifle_history</B> <I>(int max)</I> |
| <DD>Stifle the history list, remembering only the last <VAR>max</VAR> entries. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX12"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>unstifle_history</B> <I>(void)</I> |
| <DD>Stop stifling the history. This returns the previously-set |
| maximum number of history entries (as set by <CODE>stifle_history()</CODE>). |
| The value is positive if the history was |
| stifled, negative if it wasn't. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX13"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_is_stifled</B> <I>(void)</I> |
| <DD>Returns non-zero if the history is stifled, zero if it is not. |
| </DL> |
| </P><P> |
| |
| <A NAME="Information About the History List"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC12"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC11"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC13"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC13"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 2.3.3 Information About the History List </H3> |
| <!--docid::SEC12::--> |
| <P> |
| |
| These functions return information about the entire history list or |
| individual list entries. |
| </P><P> |
| |
| <A NAME="IDX14"></A> |
| <DL> |
| <DT><U>Function:</U> HIST_ENTRY ** <B>history_list</B> <I>(void)</I> |
| <DD>Return a <CODE>NULL</CODE> terminated array of <CODE>HIST_ENTRY *</CODE> which is the |
| current input history. Element 0 of this list is the beginning of time. |
| If there is no history, return <CODE>NULL</CODE>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX15"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>where_history</B> <I>(void)</I> |
| <DD>Returns the offset of the current history element. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX16"></A> |
| <DL> |
| <DT><U>Function:</U> HIST_ENTRY * <B>current_history</B> <I>(void)</I> |
| <DD>Return the history entry at the current position, as determined by |
| <CODE>where_history()</CODE>. If there is no entry there, return a <CODE>NULL</CODE> |
| pointer. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX17"></A> |
| <DL> |
| <DT><U>Function:</U> HIST_ENTRY * <B>history_get</B> <I>(int offset)</I> |
| <DD>Return the history entry at position <VAR>offset</VAR>, starting from |
| <CODE>history_base</CODE> (see section <A HREF="history.html#SEC17">2.4 History Variables</A>). |
| If there is no entry there, or if <VAR>offset</VAR> |
| is greater than the history length, return a <CODE>NULL</CODE> pointer. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX18"></A> |
| <DL> |
| <DT><U>Function:</U> time_t <B>history_get_time</B> <I>(HIST_ENTRY *entry)</I> |
| <DD>Return the time stamp associated with the history entry <VAR>entry</VAR>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX19"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_total_bytes</B> <I>(void)</I> |
| <DD>Return the number of bytes that the primary history entries are using. |
| This function returns the sum of the lengths of all the lines in the |
| history. |
| </DL> |
| </P><P> |
| |
| <A NAME="Moving Around the History List"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC13"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC12"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC14"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC14"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 2.3.4 Moving Around the History List </H3> |
| <!--docid::SEC13::--> |
| <P> |
| |
| These functions allow the current index into the history list to be |
| set or changed. |
| </P><P> |
| |
| <A NAME="IDX20"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_set_pos</B> <I>(int pos)</I> |
| <DD>Set the current history offset to <VAR>pos</VAR>, an absolute index |
| into the list. |
| Returns 1 on success, 0 if <VAR>pos</VAR> is less than zero or greater |
| than the number of history entries. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX21"></A> |
| <DL> |
| <DT><U>Function:</U> HIST_ENTRY * <B>previous_history</B> <I>(void)</I> |
| <DD>Back up the current history offset to the previous history entry, and |
| return a pointer to that entry. If there is no previous entry, return |
| a <CODE>NULL</CODE> pointer. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX22"></A> |
| <DL> |
| <DT><U>Function:</U> HIST_ENTRY * <B>next_history</B> <I>(void)</I> |
| <DD>Move the current history offset forward to the next history entry, and |
| return the a pointer to that entry. If there is no next entry, return |
| a <CODE>NULL</CODE> pointer. |
| </DL> |
| </P><P> |
| |
| <A NAME="Searching the History List"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC14"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC13"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC15"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC15"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 2.3.5 Searching the History List </H3> |
| <!--docid::SEC14::--> |
| <P> |
| |
| These functions allow searching of the history list for entries containing |
| a specific string. Searching may be performed both forward and backward |
| from the current history position. The search may be <EM>anchored</EM>, |
| meaning that the string must match at the beginning of the history entry. |
| <A NAME="IDX23"></A> |
| </P><P> |
| |
| <A NAME="IDX24"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_search</B> <I>(const char *string, int direction)</I> |
| <DD>Search the history for <VAR>string</VAR>, starting at the current history offset. |
| If <VAR>direction</VAR> is less than 0, then the search is through |
| previous entries, otherwise through subsequent entries. |
| If <VAR>string</VAR> is found, then |
| the current history index is set to that history entry, and the value |
| returned is the offset in the line of the entry where |
| <VAR>string</VAR> was found. Otherwise, nothing is changed, and a -1 is |
| returned. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX25"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_search_prefix</B> <I>(const char *string, int direction)</I> |
| <DD>Search the history for <VAR>string</VAR>, starting at the current history |
| offset. The search is anchored: matching lines must begin with |
| <VAR>string</VAR>. If <VAR>direction</VAR> is less than 0, then the search is |
| through previous entries, otherwise through subsequent entries. |
| If <VAR>string</VAR> is found, then the |
| current history index is set to that entry, and the return value is 0. |
| Otherwise, nothing is changed, and a -1 is returned. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX26"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_search_pos</B> <I>(const char *string, int direction, int pos)</I> |
| <DD>Search for <VAR>string</VAR> in the history list, starting at <VAR>pos</VAR>, an |
| absolute index into the list. If <VAR>direction</VAR> is negative, the search |
| proceeds backward from <VAR>pos</VAR>, otherwise forward. Returns the absolute |
| index of the history element where <VAR>string</VAR> was found, or -1 otherwise. |
| </DL> |
| </P><P> |
| |
| <A NAME="Managing the History File"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC15"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC14"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC16"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC16"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 2.3.6 Managing the History File </H3> |
| <!--docid::SEC15::--> |
| <P> |
| |
| The History library can read the history from and write it to a file. |
| This section documents the functions for managing a history file. |
| </P><P> |
| |
| <A NAME="IDX27"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>read_history</B> <I>(const char *filename)</I> |
| <DD>Add the contents of <VAR>filename</VAR> to the history list, a line at a time. |
| If <VAR>filename</VAR> is <CODE>NULL</CODE>, then read from <TT>`~/.history'</TT>. |
| Returns 0 if successful, or <CODE>errno</CODE> if not. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX28"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>read_history_range</B> <I>(const char *filename, int from, int to)</I> |
| <DD>Read a range of lines from <VAR>filename</VAR>, adding them to the history list. |
| Start reading at line <VAR>from</VAR> and end at <VAR>to</VAR>. |
| If <VAR>from</VAR> is zero, start at the beginning. If <VAR>to</VAR> is less than |
| <VAR>from</VAR>, then read until the end of the file. If <VAR>filename</VAR> is |
| <CODE>NULL</CODE>, then read from <TT>`~/.history'</TT>. Returns 0 if successful, |
| or <CODE>errno</CODE> if not. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX29"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>write_history</B> <I>(const char *filename)</I> |
| <DD>Write the current history to <VAR>filename</VAR>, overwriting <VAR>filename</VAR> |
| if necessary. |
| If <VAR>filename</VAR> is <CODE>NULL</CODE>, then write the history list to |
| <TT>`~/.history'</TT>. |
| Returns 0 on success, or <CODE>errno</CODE> on a read or write error. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX30"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>append_history</B> <I>(int nelements, const char *filename)</I> |
| <DD>Append the last <VAR>nelements</VAR> of the history list to <VAR>filename</VAR>. |
| If <VAR>filename</VAR> is <CODE>NULL</CODE>, then append to <TT>`~/.history'</TT>. |
| Returns 0 on success, or <CODE>errno</CODE> on a read or write error. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX31"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_truncate_file</B> <I>(const char *filename, int nlines)</I> |
| <DD>Truncate the history file <VAR>filename</VAR>, leaving only the last |
| <VAR>nlines</VAR> lines. |
| If <VAR>filename</VAR> is <CODE>NULL</CODE>, then <TT>`~/.history'</TT> is truncated. |
| Returns 0 on success, or <CODE>errno</CODE> on failure. |
| </DL> |
| </P><P> |
| |
| <A NAME="History Expansion"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC16"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC15"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC9"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> 2.3.7 History Expansion </H3> |
| <!--docid::SEC16::--> |
| <P> |
| |
| These functions implement history expansion. |
| </P><P> |
| |
| <A NAME="IDX32"></A> |
| <DL> |
| <DT><U>Function:</U> int <B>history_expand</B> <I>(char *string, char **output)</I> |
| <DD>Expand <VAR>string</VAR>, placing the result into <VAR>output</VAR>, a pointer |
| to a string (see section <A HREF="history.html#SEC2">1.1 History Expansion</A>). Returns: |
| <DL COMPACT> |
| <DT><CODE>0</CODE> |
| <DD>If no expansions took place (or, if the only change in |
| the text was the removal of escape characters preceding the history expansion |
| character); |
| <DT><CODE>1</CODE> |
| <DD>if expansions did take place; |
| <DT><CODE>-1</CODE> |
| <DD>if there was an error in expansion; |
| <DT><CODE>2</CODE> |
| <DD>if the returned line should be displayed, but not executed, |
| as with the <CODE>:p</CODE> modifier (see section <A HREF="history.html#SEC5">1.1.3 Modifiers</A>). |
| </DL> |
| <P> |
| |
| If an error ocurred in expansion, then <VAR>output</VAR> contains a descriptive |
| error message. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX33"></A> |
| <DL> |
| <DT><U>Function:</U> char * <B>get_history_event</B> <I>(const char *string, int *cindex, int qchar)</I> |
| <DD>Returns the text of the history event beginning at <VAR>string</VAR> + |
| <VAR>*cindex</VAR>. <VAR>*cindex</VAR> is modified to point to after the event |
| specifier. At function entry, <VAR>cindex</VAR> points to the index into |
| <VAR>string</VAR> where the history event specification begins. <VAR>qchar</VAR> |
| is a character that is allowed to end the event specification in addition |
| to the "normal" terminating characters. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX34"></A> |
| <DL> |
| <DT><U>Function:</U> char ** <B>history_tokenize</B> <I>(const char *string)</I> |
| <DD>Return an array of tokens parsed out of <VAR>string</VAR>, much as the |
| shell might. The tokens are split on the characters in the |
| <VAR>history_word_delimiters</VAR> variable, |
| and shell quoting conventions are obeyed. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX35"></A> |
| <DL> |
| <DT><U>Function:</U> char * <B>history_arg_extract</B> <I>(int first, int last, const char *string)</I> |
| <DD>Extract a string segment consisting of the <VAR>first</VAR> through <VAR>last</VAR> |
| arguments present in <VAR>string</VAR>. Arguments are split using |
| <CODE>history_tokenize</CODE>. |
| </DL> |
| </P><P> |
| |
| <A NAME="History Variables"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC17"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC16"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC18"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC18"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC6"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H2> 2.4 History Variables </H2> |
| <!--docid::SEC17::--> |
| <P> |
| |
| This section describes the externally-visible variables exported by |
| the GNU History Library. |
| </P><P> |
| |
| <A NAME="IDX36"></A> |
| <DL> |
| <DT><U>Variable:</U> int <B>history_base</B> |
| <DD>The logical offset of the first entry in the history list. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX37"></A> |
| <DL> |
| <DT><U>Variable:</U> int <B>history_length</B> |
| <DD>The number of entries currently stored in the history list. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX38"></A> |
| <DL> |
| <DT><U>Variable:</U> int <B>history_max_entries</B> |
| <DD>The maximum number of history entries. This must be changed using |
| <CODE>stifle_history()</CODE>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX39"></A> |
| <DL> |
| <DT><U>Variable:</U> int <B>history_write_timestamps</B> |
| <DD>If non-zero, timestamps are written to the history file, so they can be |
| preserved between sessions. The default value is 0, meaning that |
| timestamps are not saved. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX40"></A> |
| <DL> |
| <DT><U>Variable:</U> char <B>history_expansion_char</B> |
| <DD>The character that introduces a history event. The default is <SAMP>`!'</SAMP>. |
| Setting this to 0 inhibits history expansion. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX41"></A> |
| <DL> |
| <DT><U>Variable:</U> char <B>history_subst_char</B> |
| <DD>The character that invokes word substitution if found at the start of |
| a line. The default is <SAMP>`^'</SAMP>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX42"></A> |
| <DL> |
| <DT><U>Variable:</U> char <B>history_comment_char</B> |
| <DD>During tokenization, if this character is seen as the first character |
| of a word, then it and all subsequent characters up to a newline are |
| ignored, suppressing history expansion for the remainder of the line. |
| This is disabled by default. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX43"></A> |
| <DL> |
| <DT><U>Variable:</U> char * <B>history_word_delimiters</B> |
| <DD>The characters that separate tokens for <CODE>history_tokenize()</CODE>. |
| The default value is <CODE>" \t\n()<>;&|"</CODE>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX44"></A> |
| <DL> |
| <DT><U>Variable:</U> char * <B>history_search_delimiter_chars</B> |
| <DD>The list of additional characters which can delimit a history search |
| string, in addition to space, TAB, <SAMP>`:'</SAMP> and <SAMP>`?'</SAMP> in the case of |
| a substring search. The default is empty. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX45"></A> |
| <DL> |
| <DT><U>Variable:</U> char * <B>history_no_expand_chars</B> |
| <DD>The list of characters which inhibit history expansion if found immediately |
| following <VAR>history_expansion_char</VAR>. The default is space, tab, newline, |
| carriage return, and <SAMP>`='</SAMP>. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX46"></A> |
| <DL> |
| <DT><U>Variable:</U> int <B>history_quotes_inhibit_expansion</B> |
| <DD>If non-zero, single-quoted words are not scanned for the history expansion |
| character. The default value is 0. |
| </DL> |
| </P><P> |
| |
| <A NAME="IDX47"></A> |
| <DL> |
| <DT><U>Variable:</U> rl_linebuf_func_t * <B>history_inhibit_expansion_function</B> |
| <DD>This should be set to the address of a function that takes two arguments: |
| a <CODE>char *</CODE> (<VAR>string</VAR>) |
| and an <CODE>int</CODE> index into that string (<VAR>i</VAR>). |
| It should return a non-zero value if the history expansion starting at |
| <VAR>string[i]</VAR> should not be performed; zero if the expansion should |
| be done. |
| It is intended for use by applications like Bash that use the history |
| expansion character for additional purposes. |
| By default, this variable is set to <CODE>NULL</CODE>. |
| </DL> |
| </P><P> |
| |
| <A NAME="History Programming Example"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC18"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC17"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[ << ]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC6"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H2> 2.5 History Programming Example </H2> |
| <!--docid::SEC18::--> |
| <P> |
| |
| The following program demonstrates simple use of the GNU History Library. |
| </P><P> |
| |
| <TABLE><tr><td> </td><td class=smallexample><FONT SIZE=-1><pre>#include <stdio.h> |
| #include <readline/history.h> |
| |
| main (argc, argv) |
| int argc; |
| char **argv; |
| { |
| char line[1024], *t; |
| int len, done = 0; |
| |
| line[0] = 0; |
| |
| using_history (); |
| while (!done) |
| { |
| printf ("history$ "); |
| fflush (stdout); |
| t = fgets (line, sizeof (line) - 1, stdin); |
| if (t && *t) |
| { |
| len = strlen (t); |
| if (t[len - 1] == '\n') |
| t[len - 1] = '\0'; |
| } |
| |
| if (!t) |
| strcpy (line, "quit"); |
| |
| if (line[0]) |
| { |
| char *expansion; |
| int result; |
| |
| result = history_expand (line, &expansion); |
| if (result) |
| fprintf (stderr, "%s\n", expansion); |
| |
| if (result < 0 || result == 2) |
| { |
| free (expansion); |
| continue; |
| } |
| |
| add_history (expansion); |
| strncpy (line, expansion, sizeof (line) - 1); |
| free (expansion); |
| } |
| |
| if (strcmp (line, "quit") == 0) |
| done = 1; |
| else if (strcmp (line, "save") == 0) |
| write_history ("history_file"); |
| else if (strcmp (line, "read") == 0) |
| read_history ("history_file"); |
| else if (strcmp (line, "list") == 0) |
| { |
| register HIST_ENTRY **the_list; |
| register int i; |
| |
| the_list = history_list (); |
| if (the_list) |
| for (i = 0; the_list[i]; i++) |
| printf ("%d: %s\n", i + history_base, the_list[i]->line); |
| } |
| else if (strncmp (line, "delete", 6) == 0) |
| { |
| int which; |
| if ((sscanf (line + 6, "%d", &which)) == 1) |
| { |
| HIST_ENTRY *entry = remove_history (which); |
| if (!entry) |
| fprintf (stderr, "No such entry %d\n", which); |
| else |
| { |
| free (entry->line); |
| free (entry); |
| } |
| } |
| else |
| { |
| fprintf (stderr, "non-numeric arg given to `delete'\n"); |
| } |
| } |
| } |
| } |
| </FONT></pre></td></tr></table></P><P> |
| |
| <A NAME="Copying This Manual"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC19"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC18"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC20"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC6"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H1> A. Copying This Manual </H1> |
| <!--docid::SEC19::--> |
| <P> |
| |
| <BLOCKQUOTE><TABLE BORDER=0 CELLSPACING=0> |
| <TR><TD ALIGN="left" VALIGN="TOP"><A HREF="history.html#SEC20">A.1 GNU Free Documentation License</A></TD><TD> </TD><TD ALIGN="left" VALIGN="TOP">License for copying this manual.</TD></TR> |
| </TABLE></BLOCKQUOTE> |
| <P> |
| |
| <A NAME="GNU Free Documentation License"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC20"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC21"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22"> >> </A>]</TD> |
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| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
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| </TR></TABLE> |
| <H2> A.1 GNU Free Documentation License </H2> |
| <!--docid::SEC20::--> |
| <P> |
| |
| <A NAME="IDX48"></A> |
| <center> |
| Version 1.2, November 2002 |
| </center> |
| </P><P> |
| |
| <TABLE><tr><td> </td><td class=display><pre style="font-family: serif">Copyright (C) 2000,2001,2002 Free Software Foundation, Inc. |
| 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
| |
| Everyone is permitted to copy and distribute verbatim copies |
| of this license document, but changing it is not allowed. |
| </pre></td></tr></table></P><P> |
| |
| <OL> |
| <LI> |
| PREAMBLE |
| <P> |
| |
| The purpose of this License is to make a manual, textbook, or other |
| functional and useful document <EM>free</EM> in the sense of freedom: to |
| assure everyone the effective freedom to copy and redistribute it, |
| with or without modifying it, either commercially or noncommercially. |
| Secondarily, this License preserves for the author and publisher a way |
| to get credit for their work, while not being considered responsible |
| for modifications made by others. |
| </P><P> |
| |
| This License is a kind of "copyleft", which means that derivative |
| works of the document must themselves be free in the same sense. It |
| complements the GNU General Public License, which is a copyleft |
| license designed for free software. |
| </P><P> |
| |
| We have designed this License in order to use it for manuals for free |
| software, because free software needs free documentation: a free |
| program should come with manuals providing the same freedoms that the |
| software does. But this License is not limited to software manuals; |
| it can be used for any textual work, regardless of subject matter or |
| whether it is published as a printed book. We recommend this License |
| principally for works whose purpose is instruction or reference. |
| </P><P> |
| |
| <LI> |
| APPLICABILITY AND DEFINITIONS |
| <P> |
| |
| This License applies to any manual or other work, in any medium, that |
| contains a notice placed by the copyright holder saying it can be |
| distributed under the terms of this License. Such a notice grants a |
| world-wide, royalty-free license, unlimited in duration, to use that |
| work under the conditions stated herein. The "Document", below, |
| refers to any such manual or work. Any member of the public is a |
| licensee, and is addressed as "you". You accept the license if you |
| copy, modify or distribute the work in a way requiring permission |
| under copyright law. |
| </P><P> |
| |
| A "Modified Version" of the Document means any work containing the |
| Document or a portion of it, either copied verbatim, or with |
| modifications and/or translated into another language. |
| </P><P> |
| |
| A "Secondary Section" is a named appendix or a front-matter section |
| of the Document that deals exclusively with the relationship of the |
| publishers or authors of the Document to the Document's overall |
| subject (or to related matters) and contains nothing that could fall |
| directly within that overall subject. (Thus, if the Document is in |
| part a textbook of mathematics, a Secondary Section may not explain |
| any mathematics.) The relationship could be a matter of historical |
| connection with the subject or with related matters, or of legal, |
| commercial, philosophical, ethical or political position regarding |
| them. |
| </P><P> |
| |
| The "Invariant Sections" are certain Secondary Sections whose titles |
| are designated, as being those of Invariant Sections, in the notice |
| that says that the Document is released under this License. If a |
| section does not fit the above definition of Secondary then it is not |
| allowed to be designated as Invariant. The Document may contain zero |
| Invariant Sections. If the Document does not identify any Invariant |
| Sections then there are none. |
| </P><P> |
| |
| The "Cover Texts" are certain short passages of text that are listed, |
| as Front-Cover Texts or Back-Cover Texts, in the notice that says that |
| the Document is released under this License. A Front-Cover Text may |
| be at most 5 words, and a Back-Cover Text may be at most 25 words. |
| </P><P> |
| |
| A "Transparent" copy of the Document means a machine-readable copy, |
| represented in a format whose specification is available to the |
| general public, that is suitable for revising the document |
| straightforwardly with generic text editors or (for images composed of |
| pixels) generic paint programs or (for drawings) some widely available |
| drawing editor, and that is suitable for input to text formatters or |
| for automatic translation to a variety of formats suitable for input |
| to text formatters. A copy made in an otherwise Transparent file |
| format whose markup, or absence of markup, has been arranged to thwart |
| or discourage subsequent modification by readers is not Transparent. |
| An image format is not Transparent if used for any substantial amount |
| of text. A copy that is not "Transparent" is called "Opaque". |
| </P><P> |
| |
| Examples of suitable formats for Transparent copies include plain |
| ASCII without markup, Texinfo input format, LaTeX input |
| format, <FONT SIZE="-1">SGML</FONT> or <FONT SIZE="-1">XML</FONT> using a publicly available |
| <FONT SIZE="-1">DTD</FONT>, and standard-conforming simple <FONT SIZE="-1">HTML</FONT>, |
| PostScript or <FONT SIZE="-1">PDF</FONT> designed for human modification. Examples |
| of transparent image formats include <FONT SIZE="-1">PNG</FONT>, <FONT SIZE="-1">XCF</FONT> and |
| <FONT SIZE="-1">JPG</FONT>. Opaque formats include proprietary formats that can be |
| read and edited only by proprietary word processors, <FONT SIZE="-1">SGML</FONT> or |
| <FONT SIZE="-1">XML</FONT> for which the <FONT SIZE="-1">DTD</FONT> and/or processing tools are |
| not generally available, and the machine-generated <FONT SIZE="-1">HTML</FONT>, |
| PostScript or <FONT SIZE="-1">PDF</FONT> produced by some word processors for |
| output purposes only. |
| </P><P> |
| |
| The "Title Page" means, for a printed book, the title page itself, |
| plus such following pages as are needed to hold, legibly, the material |
| this License requires to appear in the title page. For works in |
| formats which do not have any title page as such, "Title Page" means |
| the text near the most prominent appearance of the work's title, |
| preceding the beginning of the body of the text. |
| </P><P> |
| |
| A section "Entitled XYZ" means a named subunit of the Document whose |
| title either is precisely XYZ or contains XYZ in parentheses following |
| text that translates XYZ in another language. (Here XYZ stands for a |
| specific section name mentioned below, such as "Acknowledgements", |
| "Dedications", "Endorsements", or "History".) To "Preserve the Title" |
| of such a section when you modify the Document means that it remains a |
| section "Entitled XYZ" according to this definition. |
| </P><P> |
| |
| The Document may include Warranty Disclaimers next to the notice which |
| states that this License applies to the Document. These Warranty |
| Disclaimers are considered to be included by reference in this |
| License, but only as regards disclaiming warranties: any other |
| implication that these Warranty Disclaimers may have is void and has |
| no effect on the meaning of this License. |
| </P><P> |
| |
| <LI> |
| VERBATIM COPYING |
| <P> |
| |
| You may copy and distribute the Document in any medium, either |
| commercially or noncommercially, provided that this License, the |
| copyright notices, and the license notice saying this License applies |
| to the Document are reproduced in all copies, and that you add no other |
| conditions whatsoever to those of this License. You may not use |
| technical measures to obstruct or control the reading or further |
| copying of the copies you make or distribute. However, you may accept |
| compensation in exchange for copies. If you distribute a large enough |
| number of copies you must also follow the conditions in section 3. |
| </P><P> |
| |
| You may also lend copies, under the same conditions stated above, and |
| you may publicly display copies. |
| </P><P> |
| |
| <LI> |
| COPYING IN QUANTITY |
| <P> |
| |
| If you publish printed copies (or copies in media that commonly have |
| printed covers) of the Document, numbering more than 100, and the |
| Document's license notice requires Cover Texts, you must enclose the |
| copies in covers that carry, clearly and legibly, all these Cover |
| Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on |
| the back cover. Both covers must also clearly and legibly identify |
| you as the publisher of these copies. The front cover must present |
| the full title with all words of the title equally prominent and |
| visible. You may add other material on the covers in addition. |
| Copying with changes limited to the covers, as long as they preserve |
| the title of the Document and satisfy these conditions, can be treated |
| as verbatim copying in other respects. |
| </P><P> |
| |
| If the required texts for either cover are too voluminous to fit |
| legibly, you should put the first ones listed (as many as fit |
| reasonably) on the actual cover, and continue the rest onto adjacent |
| pages. |
| </P><P> |
| |
| If you publish or distribute Opaque copies of the Document numbering |
| more than 100, you must either include a machine-readable Transparent |
| copy along with each Opaque copy, or state in or with each Opaque copy |
| a computer-network location from which the general network-using |
| public has access to download using public-standard network protocols |
| a complete Transparent copy of the Document, free of added material. |
| If you use the latter option, you must take reasonably prudent steps, |
| when you begin distribution of Opaque copies in quantity, to ensure |
| that this Transparent copy will remain thus accessible at the stated |
| location until at least one year after the last time you distribute an |
| Opaque copy (directly or through your agents or retailers) of that |
| edition to the public. |
| </P><P> |
| |
| It is requested, but not required, that you contact the authors of the |
| Document well before redistributing any large number of copies, to give |
| them a chance to provide you with an updated version of the Document. |
| </P><P> |
| |
| <LI> |
| MODIFICATIONS |
| <P> |
| |
| You may copy and distribute a Modified Version of the Document under |
| the conditions of sections 2 and 3 above, provided that you release |
| the Modified Version under precisely this License, with the Modified |
| Version filling the role of the Document, thus licensing distribution |
| and modification of the Modified Version to whoever possesses a copy |
| of it. In addition, you must do these things in the Modified Version: |
| </P><P> |
| |
| <OL> |
| <LI> |
| Use in the Title Page (and on the covers, if any) a title distinct |
| from that of the Document, and from those of previous versions |
| (which should, if there were any, be listed in the History section |
| of the Document). You may use the same title as a previous version |
| if the original publisher of that version gives permission. |
| <P> |
| |
| <LI> |
| List on the Title Page, as authors, one or more persons or entities |
| responsible for authorship of the modifications in the Modified |
| Version, together with at least five of the principal authors of the |
| Document (all of its principal authors, if it has fewer than five), |
| unless they release you from this requirement. |
| <P> |
| |
| <LI> |
| State on the Title page the name of the publisher of the |
| Modified Version, as the publisher. |
| <P> |
| |
| <LI> |
| Preserve all the copyright notices of the Document. |
| <P> |
| |
| <LI> |
| Add an appropriate copyright notice for your modifications |
| adjacent to the other copyright notices. |
| <P> |
| |
| <LI> |
| Include, immediately after the copyright notices, a license notice |
| giving the public permission to use the Modified Version under the |
| terms of this License, in the form shown in the Addendum below. |
| <P> |
| |
| <LI> |
| Preserve in that license notice the full lists of Invariant Sections |
| and required Cover Texts given in the Document's license notice. |
| <P> |
| |
| <LI> |
| Include an unaltered copy of this License. |
| <P> |
| |
| <LI> |
| Preserve the section Entitled "History", Preserve its Title, and add |
| to it an item stating at least the title, year, new authors, and |
| publisher of the Modified Version as given on the Title Page. If |
| there is no section Entitled "History" in the Document, create one |
| stating the title, year, authors, and publisher of the Document as |
| given on its Title Page, then add an item describing the Modified |
| Version as stated in the previous sentence. |
| <P> |
| |
| <LI> |
| Preserve the network location, if any, given in the Document for |
| public access to a Transparent copy of the Document, and likewise |
| the network locations given in the Document for previous versions |
| it was based on. These may be placed in the "History" section. |
| You may omit a network location for a work that was published at |
| least four years before the Document itself, or if the original |
| publisher of the version it refers to gives permission. |
| <P> |
| |
| <LI> |
| For any section Entitled "Acknowledgements" or "Dedications", Preserve |
| the Title of the section, and preserve in the section all the |
| substance and tone of each of the contributor acknowledgements and/or |
| dedications given therein. |
| <P> |
| |
| <LI> |
| Preserve all the Invariant Sections of the Document, |
| unaltered in their text and in their titles. Section numbers |
| or the equivalent are not considered part of the section titles. |
| <P> |
| |
| <LI> |
| Delete any section Entitled "Endorsements". Such a section |
| may not be included in the Modified Version. |
| <P> |
| |
| <LI> |
| Do not retitle any existing section to be Entitled "Endorsements" or |
| to conflict in title with any Invariant Section. |
| <P> |
| |
| <LI> |
| Preserve any Warranty Disclaimers. |
| </OL> |
| <P> |
| |
| If the Modified Version includes new front-matter sections or |
| appendices that qualify as Secondary Sections and contain no material |
| copied from the Document, you may at your option designate some or all |
| of these sections as invariant. To do this, add their titles to the |
| list of Invariant Sections in the Modified Version's license notice. |
| These titles must be distinct from any other section titles. |
| </P><P> |
| |
| You may add a section Entitled "Endorsements", provided it contains |
| nothing but endorsements of your Modified Version by various |
| parties--for example, statements of peer review or that the text has |
| been approved by an organization as the authoritative definition of a |
| standard. |
| </P><P> |
| |
| You may add a passage of up to five words as a Front-Cover Text, and a |
| passage of up to 25 words as a Back-Cover Text, to the end of the list |
| of Cover Texts in the Modified Version. Only one passage of |
| Front-Cover Text and one of Back-Cover Text may be added by (or |
| through arrangements made by) any one entity. If the Document already |
| includes a cover text for the same cover, previously added by you or |
| by arrangement made by the same entity you are acting on behalf of, |
| you may not add another; but you may replace the old one, on explicit |
| permission from the previous publisher that added the old one. |
| </P><P> |
| |
| The author(s) and publisher(s) of the Document do not by this License |
| give permission to use their names for publicity for or to assert or |
| imply endorsement of any Modified Version. |
| </P><P> |
| |
| <LI> |
| COMBINING DOCUMENTS |
| <P> |
| |
| You may combine the Document with other documents released under this |
| License, under the terms defined in section 4 above for modified |
| versions, provided that you include in the combination all of the |
| Invariant Sections of all of the original documents, unmodified, and |
| list them all as Invariant Sections of your combined work in its |
| license notice, and that you preserve all their Warranty Disclaimers. |
| </P><P> |
| |
| The combined work need only contain one copy of this License, and |
| multiple identical Invariant Sections may be replaced with a single |
| copy. If there are multiple Invariant Sections with the same name but |
| different contents, make the title of each such section unique by |
| adding at the end of it, in parentheses, the name of the original |
| author or publisher of that section if known, or else a unique number. |
| Make the same adjustment to the section titles in the list of |
| Invariant Sections in the license notice of the combined work. |
| </P><P> |
| |
| In the combination, you must combine any sections Entitled "History" |
| in the various original documents, forming one section Entitled |
| "History"; likewise combine any sections Entitled "Acknowledgements", |
| and any sections Entitled "Dedications". You must delete all |
| sections Entitled "Endorsements." |
| </P><P> |
| |
| <LI> |
| COLLECTIONS OF DOCUMENTS |
| <P> |
| |
| You may make a collection consisting of the Document and other documents |
| released under this License, and replace the individual copies of this |
| License in the various documents with a single copy that is included in |
| the collection, provided that you follow the rules of this License for |
| verbatim copying of each of the documents in all other respects. |
| </P><P> |
| |
| You may extract a single document from such a collection, and distribute |
| it individually under this License, provided you insert a copy of this |
| License into the extracted document, and follow this License in all |
| other respects regarding verbatim copying of that document. |
| </P><P> |
| |
| <LI> |
| AGGREGATION WITH INDEPENDENT WORKS |
| <P> |
| |
| A compilation of the Document or its derivatives with other separate |
| and independent documents or works, in or on a volume of a storage or |
| distribution medium, is called an "aggregate" if the copyright |
| resulting from the compilation is not used to limit the legal rights |
| of the compilation's users beyond what the individual works permit. |
| When the Document is included an aggregate, this License does not |
| apply to the other works in the aggregate which are not themselves |
| derivative works of the Document. |
| </P><P> |
| |
| If the Cover Text requirement of section 3 is applicable to these |
| copies of the Document, then if the Document is less than one half of |
| the entire aggregate, the Document's Cover Texts may be placed on |
| covers that bracket the Document within the aggregate, or the |
| electronic equivalent of covers if the Document is in electronic form. |
| Otherwise they must appear on printed covers that bracket the whole |
| aggregate. |
| </P><P> |
| |
| <LI> |
| TRANSLATION |
| <P> |
| |
| Translation is considered a kind of modification, so you may |
| distribute translations of the Document under the terms of section 4. |
| Replacing Invariant Sections with translations requires special |
| permission from their copyright holders, but you may include |
| translations of some or all Invariant Sections in addition to the |
| original versions of these Invariant Sections. You may include a |
| translation of this License, and all the license notices in the |
| Document, and any Warranty Disclaimers, provided that you also include |
| the original English version of this License and the original versions |
| of those notices and disclaimers. In case of a disagreement between |
| the translation and the original version of this License or a notice |
| or disclaimer, the original version will prevail. |
| </P><P> |
| |
| If a section in the Document is Entitled "Acknowledgements", |
| "Dedications", or "History", the requirement (section 4) to Preserve |
| its Title (section 1) will typically require changing the actual |
| title. |
| </P><P> |
| |
| <LI> |
| TERMINATION |
| <P> |
| |
| You may not copy, modify, sublicense, or distribute the Document except |
| as expressly provided for under this License. Any other attempt to |
| copy, modify, sublicense or distribute the Document is void, and will |
| automatically terminate your rights under this License. However, |
| parties who have received copies, or rights, from you under this |
| License will not have their licenses terminated so long as such |
| parties remain in full compliance. |
| </P><P> |
| |
| <LI> |
| FUTURE REVISIONS OF THIS LICENSE |
| <P> |
| |
| The Free Software Foundation may publish new, revised versions |
| of the GNU Free Documentation License from time to time. Such new |
| versions will be similar in spirit to the present version, but may |
| differ in detail to address new problems or concerns. See |
| <A HREF="http://www.gnu.org/copyleft/">http://www.gnu.org/copyleft/</A>. |
| </P><P> |
| |
| Each version of the License is given a distinguishing version number. |
| If the Document specifies that a particular numbered version of this |
| License "or any later version" applies to it, you have the option of |
| following the terms and conditions either of that specified version or |
| of any later version that has been published (not as a draft) by the |
| Free Software Foundation. If the Document does not specify a version |
| number of this License, you may choose any version ever published (not |
| as a draft) by the Free Software Foundation. |
| </OL> |
| <P> |
| |
| <HR SIZE="6"> |
| <A NAME="SEC21"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC20"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC19"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC20"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H3> A.1.1 ADDENDUM: How to use this License for your documents </H3> |
| <!--docid::SEC21::--> |
| <P> |
| |
| To use this License in a document you have written, include a copy of |
| the License in the document and put the following copyright and |
| license notices just after the title page: |
| </P><P> |
| |
| <TABLE><tr><td> </td><td class=smallexample><FONT SIZE=-1><pre> Copyright (C) <VAR>year</VAR> <VAR>your name</VAR>. |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.2 |
| or any later version published by the Free Software Foundation; |
| with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. |
| A copy of the license is included in the section entitled ``GNU |
| Free Documentation License''. |
| </FONT></pre></td></tr></table></P><P> |
| |
| If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, |
| replace the "with...Texts." line with this: |
| </P><P> |
| |
| <TABLE><tr><td> </td><td class=smallexample><FONT SIZE=-1><pre> with the Invariant Sections being <VAR>list their titles</VAR>, with |
| the Front-Cover Texts being <VAR>list</VAR>, and with the Back-Cover Texts |
| being <VAR>list</VAR>. |
| </FONT></pre></td></tr></table></P><P> |
| |
| If you have Invariant Sections without Cover Texts, or some other |
| combination of the three, merge those two alternatives to suit the |
| situation. |
| </P><P> |
| |
| If your document contains nontrivial examples of program code, we |
| recommend releasing these examples in parallel under your choice of |
| free software license, such as the GNU General Public License, |
| to permit their use in free software. |
| </P><P> |
| |
| <A NAME="Concept Index"></A> |
| <HR SIZE="6"> |
| <A NAME="SEC22"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC21"> < </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC23"> > </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC23"> << </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top"> Up </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC23"> >> </A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT"> <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H1> B. Concept Index </H1> |
| <!--docid::SEC22::--> |
| <table><tr><th valign=top>Jump to: </th><td><A HREF="history.html#cp_A" style="text-decoration:none"><b>A</b></A> |
| |
| <A HREF="history.html#cp_E" style="text-decoration:none"><b>E</b></A> |
| |
| <A HREF="history.html#cp_F" style="text-decoration:none"><b>F</b></A> |
| |
| <A HREF="history.html#cp_H" style="text-decoration:none"><b>H</b></A> |
| |
| </td></tr></table><br><P></P> |
| <TABLE border=0> |
| <TR><TD></TD><TH ALIGN=LEFT>Index Entry</TH><TH ALIGN=LEFT> Section</TH></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="cp_A"></A>A</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX23">anchored search</A></TD><TD valign=top><A HREF="history.html#SEC14">2.3.5 Searching the History List</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="cp_E"></A>E</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#SEC3">event designators</A></TD><TD valign=top><A HREF="history.html#SEC3">1.1.1 Event Designators</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="cp_F"></A>F</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX48">FDL, GNU Free Documentation License</A></TD><TD valign=top><A HREF="history.html#SEC20">A.1 GNU Free Documentation License</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="cp_H"></A>H</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX1">history events</A></TD><TD valign=top><A HREF="history.html#SEC3">1.1.1 Event Designators</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#SEC2">history expansion</A></TD><TD valign=top><A HREF="history.html#SEC2">1.1 History Expansion</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#SEC14">History Searching</A></TD><TD valign=top><A HREF="history.html#SEC14">2.3.5 Searching the History List</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| </TABLE><P></P><table><tr><th valign=top>Jump to: </th><td><A HREF="history.html#cp_A" style="text-decoration:none"><b>A</b></A> |
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| <A HREF="history.html#cp_E" style="text-decoration:none"><b>E</b></A> |
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| <A HREF="history.html#cp_F" style="text-decoration:none"><b>F</b></A> |
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| <A HREF="history.html#cp_H" style="text-decoration:none"><b>H</b></A> |
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| </td></tr></table><br><P> |
| |
| <A NAME="Function and Variable Index"></A> |
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| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
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| <H1> C. Function and Variable Index </H1> |
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| <table><tr><th valign=top>Jump to: </th><td><A HREF="history.html#vr_A" style="text-decoration:none"><b>A</b></A> |
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| <A HREF="history.html#vr_C" style="text-decoration:none"><b>C</b></A> |
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| <A HREF="history.html#vr_F" style="text-decoration:none"><b>F</b></A> |
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| </td></tr></table><br><P></P> |
| <TABLE border=0> |
| <TR><TD></TD><TH ALIGN=LEFT>Index Entry</TH><TH ALIGN=LEFT> Section</TH></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_A"></A>A</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX5"><CODE>add_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX6"><CODE>add_history_time</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX30"><CODE>append_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC15">2.3.6 Managing the History File</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_C"></A>C</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX10"><CODE>clear_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX16"><CODE>current_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC12">2.3.3 Information About the History List</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_F"></A>F</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX8"><CODE>free_history_entry</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_G"></A>G</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX33"><CODE>get_history_event</CODE></A></TD><TD valign=top><A HREF="history.html#SEC16">2.3.7 History Expansion</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_H"></A>H</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX35"><CODE>history_arg_extract</CODE></A></TD><TD valign=top><A HREF="history.html#SEC16">2.3.7 History Expansion</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX36"><CODE>history_base</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX42"><CODE>history_comment_char</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX32"><CODE>history_expand</CODE></A></TD><TD valign=top><A HREF="history.html#SEC16">2.3.7 History Expansion</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX40"><CODE>history_expansion_char</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX17"><CODE>history_get</CODE></A></TD><TD valign=top><A HREF="history.html#SEC12">2.3.3 Information About the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX3"><CODE>history_get_history_state</CODE></A></TD><TD valign=top><A HREF="history.html#SEC10">2.3.1 Initializing History and State Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX18"><CODE>history_get_time</CODE></A></TD><TD valign=top><A HREF="history.html#SEC12">2.3.3 Information About the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX47"><CODE>history_inhibit_expansion_function</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX13"><CODE>history_is_stifled</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX37"><CODE>history_length</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX14"><CODE>history_list</CODE></A></TD><TD valign=top><A HREF="history.html#SEC12">2.3.3 Information About the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX38"><CODE>history_max_entries</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX45"><CODE>history_no_expand_chars</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX46"><CODE>history_quotes_inhibit_expansion</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX24"><CODE>history_search</CODE></A></TD><TD valign=top><A HREF="history.html#SEC14">2.3.5 Searching the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX44"><CODE>history_search_delimiter_chars</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX26"><CODE>history_search_pos</CODE></A></TD><TD valign=top><A HREF="history.html#SEC14">2.3.5 Searching the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX25"><CODE>history_search_prefix</CODE></A></TD><TD valign=top><A HREF="history.html#SEC14">2.3.5 Searching the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX4"><CODE>history_set_history_state</CODE></A></TD><TD valign=top><A HREF="history.html#SEC10">2.3.1 Initializing History and State Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX20"><CODE>history_set_pos</CODE></A></TD><TD valign=top><A HREF="history.html#SEC13">2.3.4 Moving Around the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX41"><CODE>history_subst_char</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX34"><CODE>history_tokenize</CODE></A></TD><TD valign=top><A HREF="history.html#SEC16">2.3.7 History Expansion</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX19"><CODE>history_total_bytes</CODE></A></TD><TD valign=top><A HREF="history.html#SEC12">2.3.3 Information About the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX31"><CODE>history_truncate_file</CODE></A></TD><TD valign=top><A HREF="history.html#SEC15">2.3.6 Managing the History File</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX43"><CODE>history_word_delimiters</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX39"><CODE>history_write_timestamps</CODE></A></TD><TD valign=top><A HREF="history.html#SEC17">2.4 History Variables</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_N"></A>N</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX22"><CODE>next_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC13">2.3.4 Moving Around the History List</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_P"></A>P</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX21"><CODE>previous_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC13">2.3.4 Moving Around the History List</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_R"></A>R</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX27"><CODE>read_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC15">2.3.6 Managing the History File</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX28"><CODE>read_history_range</CODE></A></TD><TD valign=top><A HREF="history.html#SEC15">2.3.6 Managing the History File</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX7"><CODE>remove_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX9"><CODE>replace_history_entry</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_S"></A>S</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX11"><CODE>stifle_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_U"></A>U</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX12"><CODE>unstifle_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC11">2.3.2 History List Management</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX2"><CODE>using_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC10">2.3.1 Initializing History and State Management</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| <TR><TH><A NAME="vr_W"></A>W</TH><TD></TD><TD></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX15"><CODE>where_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC12">2.3.3 Information About the History List</A></TD></TR> |
| <TR><TD></TD><TD valign=top><A HREF="history.html#IDX29"><CODE>write_history</CODE></A></TD><TD valign=top><A HREF="history.html#SEC15">2.3.6 Managing the History File</A></TD></TR> |
| <TR><TD COLSPAN=3> <HR></TD></TR> |
| </TABLE><P></P><table><tr><th valign=top>Jump to: </th><td><A HREF="history.html#vr_A" style="text-decoration:none"><b>A</b></A> |
| |
| <A HREF="history.html#vr_C" style="text-decoration:none"><b>C</b></A> |
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| <A HREF="history.html#vr_F" style="text-decoration:none"><b>F</b></A> |
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| <A HREF="history.html#vr_G" style="text-decoration:none"><b>G</b></A> |
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| |
| <A HREF="history.html#vr_W" style="text-decoration:none"><b>W</b></A> |
| |
| </td></tr></table><br><P> |
| |
| <HR SIZE="6"> |
| <A NAME="SEC_Contents"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H1>Table of Contents</H1> |
| <UL> |
| <A NAME="TOC1" HREF="history.html#SEC1">1. Using History Interactively</A> |
| <BR> |
| <UL> |
| <A NAME="TOC2" HREF="history.html#SEC2">1.1 History Expansion</A> |
| <BR> |
| <UL> |
| <A NAME="TOC3" HREF="history.html#SEC3">1.1.1 Event Designators</A> |
| <BR> |
| <A NAME="TOC4" HREF="history.html#SEC4">1.1.2 Word Designators</A> |
| <BR> |
| <A NAME="TOC5" HREF="history.html#SEC5">1.1.3 Modifiers</A> |
| <BR> |
| </UL> |
| </UL> |
| <A NAME="TOC6" HREF="history.html#SEC6">2. Programming with GNU History</A> |
| <BR> |
| <UL> |
| <A NAME="TOC7" HREF="history.html#SEC7">2.1 Introduction to History</A> |
| <BR> |
| <A NAME="TOC8" HREF="history.html#SEC8">2.2 History Storage</A> |
| <BR> |
| <A NAME="TOC9" HREF="history.html#SEC9">2.3 History Functions</A> |
| <BR> |
| <UL> |
| <A NAME="TOC10" HREF="history.html#SEC10">2.3.1 Initializing History and State Management</A> |
| <BR> |
| <A NAME="TOC11" HREF="history.html#SEC11">2.3.2 History List Management</A> |
| <BR> |
| <A NAME="TOC12" HREF="history.html#SEC12">2.3.3 Information About the History List</A> |
| <BR> |
| <A NAME="TOC13" HREF="history.html#SEC13">2.3.4 Moving Around the History List</A> |
| <BR> |
| <A NAME="TOC14" HREF="history.html#SEC14">2.3.5 Searching the History List</A> |
| <BR> |
| <A NAME="TOC15" HREF="history.html#SEC15">2.3.6 Managing the History File</A> |
| <BR> |
| <A NAME="TOC16" HREF="history.html#SEC16">2.3.7 History Expansion</A> |
| <BR> |
| </UL> |
| <A NAME="TOC17" HREF="history.html#SEC17">2.4 History Variables</A> |
| <BR> |
| <A NAME="TOC18" HREF="history.html#SEC18">2.5 History Programming Example</A> |
| <BR> |
| </UL> |
| <A NAME="TOC19" HREF="history.html#SEC19">A. Copying This Manual</A> |
| <BR> |
| <UL> |
| <A NAME="TOC20" HREF="history.html#SEC20">A.1 GNU Free Documentation License</A> |
| <BR> |
| <UL> |
| <A NAME="TOC21" HREF="history.html#SEC21">A.1.1 ADDENDUM: How to use this License for your documents</A> |
| <BR> |
| </UL> |
| </UL> |
| <A NAME="TOC22" HREF="history.html#SEC22">B. Concept Index</A> |
| <BR> |
| <A NAME="TOC23" HREF="history.html#SEC23">C. Function and Variable Index</A> |
| <BR> |
| </UL> |
| <HR SIZE=1> |
| <A NAME="SEC_OVERVIEW"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H1>Short Table of Contents</H1> |
| <BLOCKQUOTE> |
| <A NAME="TOC1" HREF="history.html#SEC1">1. Using History Interactively</A> |
| <BR> |
| <A NAME="TOC6" HREF="history.html#SEC6">2. Programming with GNU History</A> |
| <BR> |
| <A NAME="TOC19" HREF="history.html#SEC19">A. Copying This Manual</A> |
| <BR> |
| <A NAME="TOC22" HREF="history.html#SEC22">B. Concept Index</A> |
| <BR> |
| <A NAME="TOC23" HREF="history.html#SEC23">C. Function and Variable Index</A> |
| <BR> |
| |
| </BLOCKQUOTE> |
| <HR SIZE=1> |
| <A NAME="SEC_About"></A> |
| <TABLE CELLPADDING=1 CELLSPACING=1 BORDER=0> |
| <TR><TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Top">Top</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_Contents">Contents</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC22">Index</A>]</TD> |
| <TD VALIGN="MIDDLE" ALIGN="LEFT">[<A HREF="history.html#SEC_About"> ? </A>]</TD> |
| </TR></TABLE> |
| <H1>About this document</H1> |
| This document was generated by <I>Chet Ramey</I> on <I>December, 6 2005</I> |
| using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html |
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| <table border = "1"> |
| <TR> |
| <TH> Button </TH> |
| <TH> Name </TH> |
| <TH> Go to </TH> |
| <TH> From 1.2.3 go to</TH> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [ < ] </TD> |
| <TD ALIGN="CENTER"> |
| Back |
| </TD> |
| <TD> |
| previous section in reading order |
| </TD> |
| <TD> |
| 1.2.2 |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [ > ] </TD> |
| <TD ALIGN="CENTER"> |
| Forward |
| </TD> |
| <TD> |
| next section in reading order |
| </TD> |
| <TD> |
| 1.2.4 |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [ << ] </TD> |
| <TD ALIGN="CENTER"> |
| FastBack |
| </TD> |
| <TD> |
| previous or up-and-previous section |
| </TD> |
| <TD> |
| 1.1 |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [ Up ] </TD> |
| <TD ALIGN="CENTER"> |
| Up |
| </TD> |
| <TD> |
| up section |
| </TD> |
| <TD> |
| 1.2 |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [ >> ] </TD> |
| <TD ALIGN="CENTER"> |
| FastForward |
| </TD> |
| <TD> |
| next or up-and-next section |
| </TD> |
| <TD> |
| 1.3 |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [Top] </TD> |
| <TD ALIGN="CENTER"> |
| Top |
| </TD> |
| <TD> |
| cover (top) of document |
| </TD> |
| <TD> |
| |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [Contents] </TD> |
| <TD ALIGN="CENTER"> |
| Contents |
| </TD> |
| <TD> |
| table of contents |
| </TD> |
| <TD> |
| |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [Index] </TD> |
| <TD ALIGN="CENTER"> |
| Index |
| </TD> |
| <TD> |
| concept index |
| </TD> |
| <TD> |
| |
| </TD> |
| </TR> |
| <TR> |
| <TD ALIGN="CENTER"> |
| [ ? ] </TD> |
| <TD ALIGN="CENTER"> |
| About |
| </TD> |
| <TD> |
| this page |
| </TD> |
| <TD> |
| |
| </TD> |
| </TR> |
| </TABLE> |
| <P></P> |
| where the <STRONG> Example </STRONG> assumes that the current position |
| is at <STRONG> Subsubsection One-Two-Three </STRONG> of a document of |
| the following structure: |
| <UL> |
| <LI> 1. Section One </LI> |
| <UL> |
| <LI>1.1 Subsection One-One</LI> |
| <UL> |
| <LI> ... </LI> |
| </UL> |
| <LI>1.2 Subsection One-Two</LI> |
| <UL> |
| <LI>1.2.1 Subsubsection One-Two-One |
| </LI><LI>1.2.2 Subsubsection One-Two-Two |
| </LI><LI>1.2.3 Subsubsection One-Two-Three <STRONG> |
| <== Current Position </STRONG> |
| </LI><LI>1.2.4 Subsubsection One-Two-Four |
| </LI></UL> |
| <LI>1.3 Subsection One-Three</LI> |
| <UL> |
| <LI> ... </LI> |
| </UL> |
| <LI>1.4 Subsection One-Four</LI> |
| </UL> |
| </UL> |
| |
| <HR SIZE=1> |
| <BR> |
| <FONT SIZE="-1"> |
| This document was generated |
| by <I>Chet Ramey</I> on <I>December, 6 2005</I> |
| using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html |
| "><I>texi2html</I></A> |
| |
| </BODY> |
| </HTML> |