| /* MD reader for GCC. |
| Copyright (C) 1987-2017 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* This file is compiled twice: once for the generator programs |
| once for the compiler. */ |
| #ifdef GENERATOR_FILE |
| #include "bconfig.h" |
| #else |
| #include "config.h" |
| #endif |
| #include "system.h" |
| #include "coretypes.h" |
| #ifdef GENERATOR_FILE |
| #include "errors.h" |
| #endif /* #ifdef GENERATOR_FILE */ |
| #include "statistics.h" |
| #include "vec.h" |
| #include "read-md.h" |
| |
| #ifndef GENERATOR_FILE |
| |
| /* Minimal reimplementation of errors.c for use by RTL frontend |
| within cc1. */ |
| |
| int have_error = 0; |
| |
| #endif /* #ifndef GENERATOR_FILE */ |
| |
| |
| /* Associates PTR (which can be a string, etc.) with the file location |
| specified by FILENAME and LINENO. */ |
| struct ptr_loc { |
| const void *ptr; |
| const char *filename; |
| int lineno; |
| }; |
| |
| /* This callback will be invoked whenever an md include directive is |
| processed. To be used for creation of the dependency file. */ |
| void (*include_callback) (const char *); |
| |
| /* Global singleton. */ |
| |
| md_reader *md_reader_ptr; |
| |
| /* Given an object that starts with a char * name field, return a hash |
| code for its name. */ |
| |
| hashval_t |
| leading_string_hash (const void *def) |
| { |
| return htab_hash_string (*(const char *const *) def); |
| } |
| |
| /* Given two objects that start with char * name fields, return true if |
| they have the same name. */ |
| |
| int |
| leading_string_eq_p (const void *def1, const void *def2) |
| { |
| return strcmp (*(const char *const *) def1, |
| *(const char *const *) def2) == 0; |
| } |
| |
| /* Return a hash value for the pointer pointed to by DEF. */ |
| |
| static hashval_t |
| leading_ptr_hash (const void *def) |
| { |
| return htab_hash_pointer (*(const void *const *) def); |
| } |
| |
| /* Return true if DEF1 and DEF2 are pointers to the same pointer. */ |
| |
| static int |
| leading_ptr_eq_p (const void *def1, const void *def2) |
| { |
| return *(const void *const *) def1 == *(const void *const *) def2; |
| } |
| |
| /* Associate PTR with the file position given by FILENAME and LINENO. */ |
| |
| void |
| md_reader::set_md_ptr_loc (const void *ptr, const char *filename, int lineno) |
| { |
| struct ptr_loc *loc; |
| |
| loc = (struct ptr_loc *) obstack_alloc (&m_ptr_loc_obstack, |
| sizeof (struct ptr_loc)); |
| loc->ptr = ptr; |
| loc->filename = filename; |
| loc->lineno = lineno; |
| *htab_find_slot (m_ptr_locs, loc, INSERT) = loc; |
| } |
| |
| /* Return the position associated with pointer PTR. Return null if no |
| position was set. */ |
| |
| const struct ptr_loc * |
| md_reader::get_md_ptr_loc (const void *ptr) |
| { |
| return (const struct ptr_loc *) htab_find (m_ptr_locs, &ptr); |
| } |
| |
| /* Associate NEW_PTR with the same file position as OLD_PTR. */ |
| |
| void |
| md_reader::copy_md_ptr_loc (const void *new_ptr, const void *old_ptr) |
| { |
| const struct ptr_loc *loc = get_md_ptr_loc (old_ptr); |
| if (loc != 0) |
| set_md_ptr_loc (new_ptr, loc->filename, loc->lineno); |
| } |
| |
| /* If PTR is associated with a known file position, print a #line |
| directive for it to OUTF. */ |
| |
| void |
| md_reader::fprint_md_ptr_loc (FILE *outf, const void *ptr) |
| { |
| const struct ptr_loc *loc = get_md_ptr_loc (ptr); |
| if (loc != 0) |
| fprintf (outf, "#line %d \"%s\"\n", loc->lineno, loc->filename); |
| } |
| |
| /* Special fprint_md_ptr_loc for writing to STDOUT. */ |
| void |
| md_reader::print_md_ptr_loc (const void *ptr) |
| { |
| fprint_md_ptr_loc (stdout, ptr); |
| } |
| |
| /* Return a condition that satisfies both COND1 and COND2. Either string |
| may be null or empty. */ |
| |
| const char * |
| md_reader::join_c_conditions (const char *cond1, const char *cond2) |
| { |
| char *result; |
| const void **entry; |
| |
| if (cond1 == 0 || cond1[0] == 0) |
| return cond2; |
| |
| if (cond2 == 0 || cond2[0] == 0) |
| return cond1; |
| |
| if (strcmp (cond1, cond2) == 0) |
| return cond1; |
| |
| result = concat ("(", cond1, ") && (", cond2, ")", NULL); |
| obstack_ptr_grow (&m_joined_conditions_obstack, result); |
| obstack_ptr_grow (&m_joined_conditions_obstack, cond1); |
| obstack_ptr_grow (&m_joined_conditions_obstack, cond2); |
| entry = XOBFINISH (&m_joined_conditions_obstack, const void **); |
| *htab_find_slot (m_joined_conditions, entry, INSERT) = entry; |
| return result; |
| } |
| |
| /* Print condition COND to OUTF, wrapped in brackets. If COND was created |
| by join_c_conditions, recursively invoke this function for the original |
| conditions and join the result with "&&". Otherwise print a #line |
| directive for COND if its original file position is known. */ |
| |
| void |
| md_reader::fprint_c_condition (FILE *outf, const char *cond) |
| { |
| const char **halves = (const char **) htab_find (m_joined_conditions, &cond); |
| if (halves != 0) |
| { |
| fprintf (outf, "("); |
| fprint_c_condition (outf, halves[1]); |
| fprintf (outf, " && "); |
| fprint_c_condition (outf, halves[2]); |
| fprintf (outf, ")"); |
| } |
| else |
| { |
| fputc ('\n', outf); |
| fprint_md_ptr_loc (outf, cond); |
| fprintf (outf, "(%s)", cond); |
| } |
| } |
| |
| /* Special fprint_c_condition for writing to STDOUT. */ |
| |
| void |
| md_reader::print_c_condition (const char *cond) |
| { |
| fprint_c_condition (stdout, cond); |
| } |
| |
| /* A vfprintf-like function for reporting an error against line LINENO |
| of the current MD file. */ |
| |
| static void ATTRIBUTE_PRINTF(2,0) |
| message_at_1 (file_location loc, const char *msg, va_list ap) |
| { |
| fprintf (stderr, "%s:%d:%d: ", loc.filename, loc.lineno, loc.colno); |
| vfprintf (stderr, msg, ap); |
| fputc ('\n', stderr); |
| } |
| |
| /* A printf-like function for reporting a message against location LOC. */ |
| |
| void |
| message_at (file_location loc, const char *msg, ...) |
| { |
| va_list ap; |
| |
| va_start (ap, msg); |
| message_at_1 (loc, msg, ap); |
| va_end (ap); |
| } |
| |
| /* Like message_at, but treat the condition as an error. */ |
| |
| void |
| error_at (file_location loc, const char *msg, ...) |
| { |
| va_list ap; |
| |
| va_start (ap, msg); |
| message_at_1 (loc, msg, ap); |
| va_end (ap); |
| have_error = 1; |
| } |
| |
| /* Like message_at, but treat the condition as a fatal error. */ |
| |
| void |
| fatal_at (file_location loc, const char *msg, ...) |
| { |
| va_list ap; |
| |
| va_start (ap, msg); |
| message_at_1 (loc, msg, ap); |
| va_end (ap); |
| exit (1); |
| } |
| |
| /* A printf-like function for reporting an error against the current |
| position in the MD file. */ |
| |
| void |
| fatal_with_file_and_line (const char *msg, ...) |
| { |
| char context[64]; |
| size_t i; |
| int c; |
| va_list ap; |
| |
| va_start (ap, msg); |
| |
| fprintf (stderr, "%s:%d:%d: error: ", md_reader_ptr->get_filename (), |
| md_reader_ptr->get_lineno (), |
| md_reader_ptr->get_colno ()); |
| vfprintf (stderr, msg, ap); |
| putc ('\n', stderr); |
| |
| /* Gather some following context. */ |
| for (i = 0; i < sizeof (context)-1; ++i) |
| { |
| c = read_char (); |
| if (c == EOF) |
| break; |
| if (c == '\r' || c == '\n') |
| { |
| unread_char (c); |
| break; |
| } |
| context[i] = c; |
| } |
| context[i] = '\0'; |
| |
| fprintf (stderr, "%s:%d:%d: note: following context is `%s'\n", |
| md_reader_ptr->get_filename (), |
| md_reader_ptr->get_lineno (), |
| md_reader_ptr->get_colno (), context); |
| |
| va_end (ap); |
| exit (1); |
| } |
| |
| /* Report that we found character ACTUAL when we expected to find |
| character EXPECTED. */ |
| |
| void |
| fatal_expected_char (int expected, int actual) |
| { |
| if (actual == EOF) |
| fatal_with_file_and_line ("expected character `%c', found EOF", |
| expected); |
| else |
| fatal_with_file_and_line ("expected character `%c', found `%c'", |
| expected, actual); |
| } |
| |
| /* Read chars from the MD file until a non-whitespace char and return that. |
| Comments, both Lisp style and C style, are treated as whitespace. */ |
| |
| int |
| read_skip_spaces (void) |
| { |
| int c; |
| |
| while (1) |
| { |
| c = read_char (); |
| switch (c) |
| { |
| case ' ': case '\t': case '\f': case '\r': case '\n': |
| break; |
| |
| case ';': |
| do |
| c = read_char (); |
| while (c != '\n' && c != EOF); |
| break; |
| |
| case '/': |
| { |
| int prevc; |
| c = read_char (); |
| if (c != '*') |
| { |
| unread_char (c); |
| fatal_with_file_and_line ("stray '/' in file"); |
| } |
| |
| prevc = 0; |
| while ((c = read_char ()) && c != EOF) |
| { |
| if (prevc == '*' && c == '/') |
| break; |
| prevc = c; |
| } |
| } |
| break; |
| |
| default: |
| return c; |
| } |
| } |
| } |
| |
| /* Consume the next character, issuing a fatal error if it is not |
| EXPECTED. */ |
| |
| void |
| md_reader::require_char (char expected) |
| { |
| int ch = read_char (); |
| if (ch != expected) |
| fatal_expected_char (expected, ch); |
| } |
| |
| /* Consume any whitespace, then consume the next non-whitespace |
| character, issuing a fatal error if it is not EXPECTED. */ |
| |
| void |
| md_reader::require_char_ws (char expected) |
| { |
| int ch = read_skip_spaces (); |
| if (ch != expected) |
| fatal_expected_char (expected, ch); |
| } |
| |
| /* Consume any whitespace, then consume the next word (as per read_name), |
| issuing a fatal error if it is not EXPECTED. */ |
| |
| void |
| md_reader::require_word_ws (const char *expected) |
| { |
| struct md_name name; |
| read_name (&name); |
| if (strcmp (name.string, expected)) |
| fatal_with_file_and_line ("missing '%s'", expected); |
| } |
| |
| /* Read the next character from the file. */ |
| |
| int |
| md_reader::read_char (void) |
| { |
| int ch; |
| |
| ch = getc (m_read_md_file); |
| if (ch == '\n') |
| { |
| m_read_md_lineno++; |
| m_last_line_colno = m_read_md_colno; |
| m_read_md_colno = 0; |
| } |
| else |
| m_read_md_colno++; |
| |
| /* If we're filtering lines, treat everything before the range of |
| interest as a space, and as EOF for everything after. */ |
| if (m_first_line && m_last_line) |
| { |
| if (m_read_md_lineno < m_first_line) |
| return ' '; |
| if (m_read_md_lineno > m_last_line) |
| return EOF; |
| } |
| |
| return ch; |
| } |
| |
| /* Put back CH, which was the last character read from the file. */ |
| |
| void |
| md_reader::unread_char (int ch) |
| { |
| if (ch == '\n') |
| { |
| m_read_md_lineno--; |
| m_read_md_colno = m_last_line_colno; |
| } |
| else |
| m_read_md_colno--; |
| ungetc (ch, m_read_md_file); |
| } |
| |
| /* Peek at the next character from the file without consuming it. */ |
| |
| int |
| md_reader::peek_char (void) |
| { |
| int ch = read_char (); |
| unread_char (ch); |
| return ch; |
| } |
| |
| /* Read an rtx code name into NAME. It is terminated by any of the |
| punctuation chars of rtx printed syntax. */ |
| |
| bool |
| md_reader::read_name_1 (struct md_name *name, file_location *out_loc) |
| { |
| int c; |
| size_t i; |
| int angle_bracket_depth; |
| |
| c = read_skip_spaces (); |
| |
| *out_loc = get_current_location (); |
| |
| i = 0; |
| angle_bracket_depth = 0; |
| while (1) |
| { |
| if (c == '<') |
| angle_bracket_depth++; |
| |
| if ((c == '>') && (angle_bracket_depth > 0)) |
| angle_bracket_depth--; |
| |
| if (c == ' ' || c == '\n' || c == '\t' || c == '\f' || c == '\r' |
| || c == EOF) |
| break; |
| if (angle_bracket_depth == 0) |
| { |
| if (c == ':' || c == ')' || c == ']' |
| || c == '"' || c == '/' || c == '(' || c == '[') |
| { |
| unread_char (c); |
| break; |
| } |
| } |
| |
| if (i == sizeof (name->buffer) - 1) |
| fatal_with_file_and_line ("name too long"); |
| name->buffer[i++] = c; |
| |
| c = read_char (); |
| } |
| |
| if (i == 0) |
| return false; |
| |
| name->buffer[i] = 0; |
| name->string = name->buffer; |
| |
| if (m_md_constants) |
| { |
| /* Do constant expansion. */ |
| struct md_constant *def; |
| |
| do |
| { |
| struct md_constant tmp_def; |
| |
| tmp_def.name = name->string; |
| def = (struct md_constant *) htab_find (m_md_constants, &tmp_def); |
| if (def) |
| name->string = def->value; |
| } |
| while (def); |
| } |
| |
| return true; |
| } |
| |
| /* Read an rtx code name into NAME. It is terminated by any of the |
| punctuation chars of rtx printed syntax. */ |
| |
| file_location |
| md_reader::read_name (struct md_name *name) |
| { |
| file_location loc; |
| if (!read_name_1 (name, &loc)) |
| fatal_with_file_and_line ("missing name or number"); |
| return loc; |
| } |
| |
| file_location |
| md_reader::read_name_or_nil (struct md_name *name) |
| { |
| file_location loc; |
| if (!read_name_1 (name, &loc)) |
| { |
| file_location loc = get_current_location (); |
| read_skip_construct (0, loc); |
| /* Skip the ')'. */ |
| read_char (); |
| name->buffer[0] = 0; |
| name->string = name->buffer; |
| } |
| return loc; |
| } |
| |
| /* Subroutine of the string readers. Handles backslash escapes. |
| Caller has read the backslash, but not placed it into the obstack. */ |
| |
| void |
| md_reader::read_escape () |
| { |
| int c = read_char (); |
| |
| switch (c) |
| { |
| /* Backslash-newline is replaced by nothing, as in C. */ |
| case '\n': |
| return; |
| |
| /* \" \' \\ are replaced by the second character. */ |
| case '\\': |
| case '"': |
| case '\'': |
| break; |
| |
| /* Standard C string escapes: |
| \a \b \f \n \r \t \v |
| \[0-7] \x |
| all are passed through to the output string unmolested. |
| In normal use these wind up in a string constant processed |
| by the C compiler, which will translate them appropriately. |
| We do not bother checking that \[0-7] are followed by up to |
| two octal digits, or that \x is followed by N hex digits. |
| \? \u \U are left out because they are not in traditional C. */ |
| case 'a': case 'b': case 'f': case 'n': case 'r': case 't': case 'v': |
| case '0': case '1': case '2': case '3': case '4': case '5': case '6': |
| case '7': case 'x': |
| obstack_1grow (&m_string_obstack, '\\'); |
| break; |
| |
| /* \; makes stuff for a C string constant containing |
| newline and tab. */ |
| case ';': |
| obstack_grow (&m_string_obstack, "\\n\\t", 4); |
| return; |
| |
| /* pass anything else through, but issue a warning. */ |
| default: |
| fprintf (stderr, "%s:%d: warning: unrecognized escape \\%c\n", |
| get_filename (), get_lineno (), |
| c); |
| obstack_1grow (&m_string_obstack, '\\'); |
| break; |
| } |
| |
| obstack_1grow (&m_string_obstack, c); |
| } |
| |
| /* Read a double-quoted string onto the obstack. Caller has scanned |
| the leading quote. */ |
| |
| char * |
| md_reader::read_quoted_string () |
| { |
| int c; |
| |
| while (1) |
| { |
| c = read_char (); /* Read the string */ |
| if (c == '\\') |
| { |
| read_escape (); |
| continue; |
| } |
| else if (c == '"' || c == EOF) |
| break; |
| |
| obstack_1grow (&m_string_obstack, c); |
| } |
| |
| obstack_1grow (&m_string_obstack, 0); |
| return XOBFINISH (&m_string_obstack, char *); |
| } |
| |
| /* Read a braced string (a la Tcl) onto the string obstack. Caller |
| has scanned the leading brace. Note that unlike quoted strings, |
| the outermost braces _are_ included in the string constant. */ |
| |
| char * |
| md_reader::read_braced_string () |
| { |
| int c; |
| int brace_depth = 1; /* caller-processed */ |
| unsigned long starting_read_md_lineno = get_lineno (); |
| |
| obstack_1grow (&m_string_obstack, '{'); |
| while (brace_depth) |
| { |
| c = read_char (); /* Read the string */ |
| |
| if (c == '{') |
| brace_depth++; |
| else if (c == '}') |
| brace_depth--; |
| else if (c == '\\') |
| { |
| read_escape (); |
| continue; |
| } |
| else if (c == EOF) |
| fatal_with_file_and_line |
| ("missing closing } for opening brace on line %lu", |
| starting_read_md_lineno); |
| |
| obstack_1grow (&m_string_obstack, c); |
| } |
| |
| obstack_1grow (&m_string_obstack, 0); |
| return XOBFINISH (&m_string_obstack, char *); |
| } |
| |
| /* Read some kind of string constant. This is the high-level routine |
| used by read_rtx. It handles surrounding parentheses, leading star, |
| and dispatch to the appropriate string constant reader. */ |
| |
| char * |
| md_reader::read_string (int star_if_braced) |
| { |
| char *stringbuf; |
| int saw_paren = 0; |
| int c, old_lineno; |
| |
| c = read_skip_spaces (); |
| if (c == '(') |
| { |
| saw_paren = 1; |
| c = read_skip_spaces (); |
| } |
| |
| old_lineno = get_lineno (); |
| if (c == '"') |
| stringbuf = read_quoted_string (); |
| else if (c == '{') |
| { |
| if (star_if_braced) |
| obstack_1grow (&m_string_obstack, '*'); |
| stringbuf = read_braced_string (); |
| } |
| else if (saw_paren && c == 'n') |
| { |
| /* Handle (nil) by returning NULL. */ |
| require_char ('i'); |
| require_char ('l'); |
| require_char_ws (')'); |
| return NULL; |
| } |
| else |
| fatal_with_file_and_line ("expected `\"' or `{', found `%c'", c); |
| |
| if (saw_paren) |
| require_char_ws (')'); |
| |
| set_md_ptr_loc (stringbuf, get_filename (), old_lineno); |
| return stringbuf; |
| } |
| |
| /* Skip the rest of a construct that started at line LINENO and that |
| is currently nested by DEPTH levels of parentheses. */ |
| |
| void |
| md_reader::read_skip_construct (int depth, file_location loc) |
| { |
| struct md_name name; |
| int c; |
| |
| do |
| { |
| c = read_skip_spaces (); |
| if (c == EOF) |
| { |
| error_at (loc, "unterminated construct"); |
| exit (1); |
| } |
| switch (c) |
| { |
| case '(': |
| depth++; |
| break; |
| |
| case ')': |
| depth--; |
| break; |
| |
| case ':': |
| case '[': |
| case ']': |
| case '/': |
| break; |
| |
| case '\"': |
| case '{': |
| unread_char (c); |
| read_string (false); |
| break; |
| |
| default: |
| unread_char (c); |
| read_name (&name); |
| break; |
| } |
| } |
| while (depth > 0); |
| unread_char (c); |
| } |
| |
| /* Given a string, return the number of comma-separated elements in it. |
| Return 0 for the null string. */ |
| |
| int |
| n_comma_elts (const char *s) |
| { |
| int n; |
| |
| if (*s == '\0') |
| return 0; |
| |
| for (n = 1; *s; s++) |
| if (*s == ',') |
| n++; |
| |
| return n; |
| } |
| |
| /* Given a pointer to a (char *), return a pointer to the beginning of the |
| next comma-separated element in the string. Advance the pointer given |
| to the end of that element. Return NULL if at end of string. Caller |
| is responsible for copying the string if necessary. White space between |
| a comma and an element is ignored. */ |
| |
| const char * |
| scan_comma_elt (const char **pstr) |
| { |
| const char *start; |
| const char *p = *pstr; |
| |
| if (*p == ',') |
| p++; |
| while (ISSPACE (*p)) |
| p++; |
| |
| if (*p == '\0') |
| return NULL; |
| |
| start = p; |
| |
| while (*p != ',' && *p != '\0') |
| p++; |
| |
| *pstr = p; |
| return start; |
| } |
| |
| /* Convert STRING to uppercase. */ |
| |
| void |
| upcase_string (char *string) |
| { |
| int i; |
| |
| for (i = 0; string[i]; i++) |
| string[i] = TOUPPER (string[i]); |
| } |
| |
| /* Add a NAME = VALUE definition to md_constants-style hash table DEFS, |
| where both NAME and VALUE are malloc()ed strings. PARENT_ENUM is the |
| enum to which NAME belongs, or null if NAME is a stand-alone constant. */ |
| |
| static struct md_constant * |
| add_constant (htab_t defs, char *name, char *value, |
| struct enum_type *parent_enum) |
| { |
| struct md_constant *def, tmp_def; |
| void **entry_ptr; |
| |
| tmp_def.name = name; |
| entry_ptr = htab_find_slot (defs, &tmp_def, INSERT); |
| if (*entry_ptr) |
| { |
| def = (struct md_constant *) *entry_ptr; |
| if (strcmp (def->value, value) != 0) |
| fatal_with_file_and_line ("redefinition of `%s', was `%s', now `%s'", |
| def->name, def->value, value); |
| else if (parent_enum || def->parent_enum) |
| fatal_with_file_and_line ("redefinition of `%s'", def->name); |
| free (name); |
| free (value); |
| } |
| else |
| { |
| def = XNEW (struct md_constant); |
| def->name = name; |
| def->value = value; |
| def->parent_enum = parent_enum; |
| *entry_ptr = def; |
| } |
| return def; |
| } |
| |
| /* Process a define_constants directive, starting with the optional space |
| after the "define_constants". */ |
| |
| void |
| md_reader::handle_constants () |
| { |
| int c; |
| htab_t defs; |
| |
| require_char_ws ('['); |
| |
| /* Disable constant expansion during definition processing. */ |
| defs = m_md_constants; |
| m_md_constants = 0; |
| while ( (c = read_skip_spaces ()) != ']') |
| { |
| struct md_name name, value; |
| |
| if (c != '(') |
| fatal_expected_char ('(', c); |
| |
| read_name (&name); |
| read_name (&value); |
| add_constant (defs, xstrdup (name.string), xstrdup (value.string), 0); |
| |
| require_char_ws (')'); |
| } |
| m_md_constants = defs; |
| } |
| |
| /* For every constant definition, call CALLBACK with two arguments: |
| a pointer a pointer to the constant definition and INFO. |
| Stop when CALLBACK returns zero. */ |
| |
| void |
| md_reader::traverse_md_constants (htab_trav callback, void *info) |
| { |
| htab_traverse (get_md_constants (), callback, info); |
| } |
| |
| /* Return a malloc()ed decimal string that represents number NUMBER. */ |
| |
| static char * |
| md_decimal_string (int number) |
| { |
| /* A safe overestimate. +1 for sign, +1 for null terminator. */ |
| char buffer[sizeof (int) * CHAR_BIT + 1 + 1]; |
| |
| sprintf (buffer, "%d", number); |
| return xstrdup (buffer); |
| } |
| |
| /* Process a define_enum or define_c_enum directive, starting with |
| the optional space after the "define_enum". LINENO is the line |
| number on which the directive started and MD_P is true if the |
| directive is a define_enum rather than a define_c_enum. */ |
| |
| void |
| md_reader::handle_enum (file_location loc, bool md_p) |
| { |
| char *enum_name, *value_name; |
| struct md_name name; |
| struct enum_type *def; |
| struct enum_value *ev; |
| void **slot; |
| int c; |
| |
| enum_name = read_string (false); |
| slot = htab_find_slot (m_enum_types, &enum_name, INSERT); |
| if (*slot) |
| { |
| def = (struct enum_type *) *slot; |
| if (def->md_p != md_p) |
| error_at (loc, "redefining `%s' as a different type of enum", |
| enum_name); |
| } |
| else |
| { |
| def = XNEW (struct enum_type); |
| def->name = enum_name; |
| def->md_p = md_p; |
| def->values = 0; |
| def->tail_ptr = &def->values; |
| def->num_values = 0; |
| *slot = def; |
| } |
| |
| require_char_ws ('['); |
| |
| while ((c = read_skip_spaces ()) != ']') |
| { |
| if (c == EOF) |
| { |
| error_at (loc, "unterminated construct"); |
| exit (1); |
| } |
| unread_char (c); |
| read_name (&name); |
| |
| ev = XNEW (struct enum_value); |
| ev->next = 0; |
| if (md_p) |
| { |
| value_name = concat (def->name, "_", name.string, NULL); |
| upcase_string (value_name); |
| ev->name = xstrdup (name.string); |
| } |
| else |
| { |
| value_name = xstrdup (name.string); |
| ev->name = value_name; |
| } |
| ev->def = add_constant (get_md_constants (), value_name, |
| md_decimal_string (def->num_values), def); |
| |
| *def->tail_ptr = ev; |
| def->tail_ptr = &ev->next; |
| def->num_values++; |
| } |
| } |
| |
| /* Try to find the definition of the given enum. Return null on failure. */ |
| |
| struct enum_type * |
| md_reader::lookup_enum_type (const char *name) |
| { |
| return (struct enum_type *) htab_find (m_enum_types, &name); |
| } |
| |
| /* For every enum definition, call CALLBACK with two arguments: |
| a pointer to the constant definition and INFO. Stop when CALLBACK |
| returns zero. */ |
| |
| void |
| md_reader::traverse_enum_types (htab_trav callback, void *info) |
| { |
| htab_traverse (m_enum_types, callback, info); |
| } |
| |
| |
| /* Constructor for md_reader. */ |
| |
| md_reader::md_reader (bool compact) |
| : m_compact (compact), |
| m_toplevel_fname (NULL), |
| m_base_dir (NULL), |
| m_read_md_file (NULL), |
| m_read_md_filename (NULL), |
| m_read_md_lineno (0), |
| m_read_md_colno (0), |
| m_first_dir_md_include (NULL), |
| m_last_dir_md_include_ptr (&m_first_dir_md_include), |
| m_first_line (0), |
| m_last_line (0) |
| { |
| /* Set the global singleton pointer. */ |
| md_reader_ptr = this; |
| |
| obstack_init (&m_string_obstack); |
| |
| m_ptr_locs = htab_create (161, leading_ptr_hash, leading_ptr_eq_p, 0); |
| obstack_init (&m_ptr_loc_obstack); |
| |
| m_joined_conditions = htab_create (161, leading_ptr_hash, leading_ptr_eq_p, 0); |
| obstack_init (&m_joined_conditions_obstack); |
| |
| m_md_constants = htab_create (31, leading_string_hash, |
| leading_string_eq_p, (htab_del) 0); |
| |
| m_enum_types = htab_create (31, leading_string_hash, |
| leading_string_eq_p, (htab_del) 0); |
| |
| /* Unlock the stdio streams. */ |
| unlock_std_streams (); |
| } |
| |
| /* md_reader's destructor. */ |
| |
| md_reader::~md_reader () |
| { |
| free (m_base_dir); |
| |
| htab_delete (m_enum_types); |
| |
| htab_delete (m_md_constants); |
| |
| obstack_free (&m_joined_conditions_obstack, NULL); |
| htab_delete (m_joined_conditions); |
| |
| obstack_free (&m_ptr_loc_obstack, NULL); |
| htab_delete (m_ptr_locs); |
| |
| obstack_free (&m_string_obstack, NULL); |
| |
| /* Clear the global singleton pointer. */ |
| md_reader_ptr = NULL; |
| } |
| |
| /* Process an "include" directive, starting with the optional space |
| after the "include". Read in the file and use HANDLE_DIRECTIVE |
| to process each unknown directive. LINENO is the line number on |
| which the "include" occurred. */ |
| |
| void |
| md_reader::handle_include (file_location loc) |
| { |
| const char *filename; |
| const char *old_filename; |
| int old_lineno, old_colno; |
| char *pathname; |
| FILE *input_file, *old_file; |
| |
| filename = read_string (false); |
| input_file = NULL; |
| |
| /* If the specified file name is absolute, skip the include stack. */ |
| if (!IS_ABSOLUTE_PATH (filename)) |
| { |
| struct file_name_list *stackp; |
| |
| /* Search the directory path, trying to open the file. */ |
| for (stackp = m_first_dir_md_include; stackp; stackp = stackp->next) |
| { |
| static const char sep[2] = { DIR_SEPARATOR, '\0' }; |
| |
| pathname = concat (stackp->fname, sep, filename, NULL); |
| input_file = fopen (pathname, "r"); |
| if (input_file != NULL) |
| break; |
| free (pathname); |
| } |
| } |
| |
| /* If we haven't managed to open the file yet, try combining the |
| filename with BASE_DIR. */ |
| if (input_file == NULL) |
| { |
| if (m_base_dir) |
| pathname = concat (m_base_dir, filename, NULL); |
| else |
| pathname = xstrdup (filename); |
| input_file = fopen (pathname, "r"); |
| } |
| |
| if (input_file == NULL) |
| { |
| free (pathname); |
| error_at (loc, "include file `%s' not found", filename); |
| return; |
| } |
| |
| /* Save the old cursor. Note that the LINENO argument to this |
| function is the beginning of the include statement, while |
| read_md_lineno has already been advanced. */ |
| old_file = m_read_md_file; |
| old_filename = m_read_md_filename; |
| old_lineno = m_read_md_lineno; |
| old_colno = m_read_md_colno; |
| |
| if (include_callback) |
| include_callback (pathname); |
| |
| m_read_md_file = input_file; |
| m_read_md_filename = pathname; |
| |
| handle_file (); |
| |
| /* Restore the old cursor. */ |
| m_read_md_file = old_file; |
| m_read_md_filename = old_filename; |
| m_read_md_lineno = old_lineno; |
| m_read_md_colno = old_colno; |
| |
| /* Do not free the pathname. It is attached to the various rtx |
| queue elements. */ |
| } |
| |
| /* Process the current file, assuming that read_md_file and |
| read_md_filename are valid. Use HANDLE_DIRECTIVE to handle |
| unknown directives. */ |
| |
| void |
| md_reader::handle_file () |
| { |
| struct md_name directive; |
| int c; |
| |
| m_read_md_lineno = 1; |
| m_read_md_colno = 0; |
| while ((c = read_skip_spaces ()) != EOF) |
| { |
| file_location loc = get_current_location (); |
| if (c != '(') |
| fatal_expected_char ('(', c); |
| |
| read_name (&directive); |
| if (strcmp (directive.string, "define_constants") == 0) |
| handle_constants (); |
| else if (strcmp (directive.string, "define_enum") == 0) |
| handle_enum (loc, true); |
| else if (strcmp (directive.string, "define_c_enum") == 0) |
| handle_enum (loc, false); |
| else if (strcmp (directive.string, "include") == 0) |
| handle_include (loc); |
| else |
| handle_unknown_directive (loc, directive.string); |
| |
| require_char_ws (')'); |
| } |
| fclose (m_read_md_file); |
| } |
| |
| /* Like handle_file, but for top-level files. Set up m_toplevel_fname |
| and m_base_dir accordingly. */ |
| |
| void |
| md_reader::handle_toplevel_file () |
| { |
| const char *base; |
| |
| m_toplevel_fname = m_read_md_filename; |
| base = lbasename (m_toplevel_fname); |
| if (base == m_toplevel_fname) |
| m_base_dir = NULL; |
| else |
| m_base_dir = xstrndup (m_toplevel_fname, base - m_toplevel_fname); |
| |
| handle_file (); |
| } |
| |
| file_location |
| md_reader::get_current_location () const |
| { |
| return file_location (m_read_md_filename, m_read_md_lineno, m_read_md_colno); |
| } |
| |
| /* Parse a -I option with argument ARG. */ |
| |
| void |
| md_reader::add_include_path (const char *arg) |
| { |
| struct file_name_list *dirtmp; |
| |
| dirtmp = XNEW (struct file_name_list); |
| dirtmp->next = 0; |
| dirtmp->fname = arg; |
| *m_last_dir_md_include_ptr = dirtmp; |
| m_last_dir_md_include_ptr = &dirtmp->next; |
| } |
| |
| #ifdef GENERATOR_FILE |
| |
| /* The main routine for reading .md files. Try to process all the .md |
| files specified on the command line and return true if no error occurred. |
| |
| ARGC and ARGV are the arguments to main. |
| |
| PARSE_OPT, if nonnull, is passed all unknown command-line arguments. |
| It should return true if it recognizes the argument or false if a |
| generic error should be reported. */ |
| |
| bool |
| md_reader::read_md_files (int argc, const char **argv, |
| bool (*parse_opt) (const char *)) |
| { |
| int i; |
| bool no_more_options; |
| bool already_read_stdin; |
| int num_files; |
| |
| /* First we loop over all the options. */ |
| for (i = 1; i < argc; i++) |
| if (argv[i][0] == '-') |
| { |
| /* An argument consisting of exactly one dash is a request to |
| read stdin. This will be handled in the second loop. */ |
| if (argv[i][1] == '\0') |
| continue; |
| |
| /* An argument consisting of just two dashes causes option |
| parsing to cease. */ |
| if (argv[i][1] == '-' && argv[i][2] == '\0') |
| break; |
| |
| if (argv[i][1] == 'I') |
| { |
| if (argv[i][2] != '\0') |
| add_include_path (argv[i] + 2); |
| else if (++i < argc) |
| add_include_path (argv[i]); |
| else |
| fatal ("directory name missing after -I option"); |
| continue; |
| } |
| |
| /* The program may have provided a callback so it can |
| accept its own options. */ |
| if (parse_opt && parse_opt (argv[i])) |
| continue; |
| |
| fatal ("invalid option `%s'", argv[i]); |
| } |
| |
| /* Now loop over all input files. */ |
| num_files = 0; |
| no_more_options = false; |
| already_read_stdin = false; |
| for (i = 1; i < argc; i++) |
| { |
| if (argv[i][0] == '-') |
| { |
| if (argv[i][1] == '\0') |
| { |
| /* Read stdin. */ |
| if (already_read_stdin) |
| fatal ("cannot read standard input twice"); |
| |
| m_read_md_file = stdin; |
| m_read_md_filename = "<stdin>"; |
| handle_toplevel_file (); |
| already_read_stdin = true; |
| continue; |
| } |
| else if (argv[i][1] == '-' && argv[i][2] == '\0') |
| { |
| /* No further arguments are to be treated as options. */ |
| no_more_options = true; |
| continue; |
| } |
| else if (!no_more_options) |
| continue; |
| } |
| |
| /* If we get here we are looking at a non-option argument, i.e. |
| a file to be processed. */ |
| m_read_md_filename = argv[i]; |
| m_read_md_file = fopen (m_read_md_filename, "r"); |
| if (m_read_md_file == 0) |
| { |
| perror (m_read_md_filename); |
| return false; |
| } |
| handle_toplevel_file (); |
| num_files++; |
| } |
| |
| /* If we get to this point without having seen any files to process, |
| read the standard input now. */ |
| if (num_files == 0 && !already_read_stdin) |
| { |
| m_read_md_file = stdin; |
| m_read_md_filename = "<stdin>"; |
| handle_toplevel_file (); |
| } |
| |
| return !have_error; |
| } |
| |
| #endif /* #ifdef GENERATOR_FILE */ |
| |
| /* Read FILENAME. */ |
| |
| bool |
| md_reader::read_file (const char *filename) |
| { |
| m_read_md_filename = filename; |
| m_read_md_file = fopen (m_read_md_filename, "r"); |
| if (m_read_md_file == 0) |
| { |
| perror (m_read_md_filename); |
| return false; |
| } |
| handle_toplevel_file (); |
| return !have_error; |
| } |
| |
| /* Read FILENAME, filtering to just the given lines. */ |
| |
| bool |
| md_reader::read_file_fragment (const char *filename, |
| int first_line, |
| int last_line) |
| { |
| m_read_md_filename = filename; |
| m_read_md_file = fopen (m_read_md_filename, "r"); |
| if (m_read_md_file == 0) |
| { |
| perror (m_read_md_filename); |
| return false; |
| } |
| m_first_line = first_line; |
| m_last_line = last_line; |
| handle_toplevel_file (); |
| return !have_error; |
| } |
| |
| /* class noop_reader : public md_reader */ |
| |
| /* A dummy implementation which skips unknown directives. */ |
| void |
| noop_reader::handle_unknown_directive (file_location loc, const char *) |
| { |
| read_skip_construct (1, loc); |
| } |