| /* CPP Library. |
| Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
| Contributed by Per Bothner, 1994-95. |
| Based on CCCP program by Paul Rubin, June 1986 |
| Adapted to ANSI C, Richard Stallman, Jan 1987 |
| |
| This program 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 2, or (at your option) any |
| later version. |
| |
| This program 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 this program; if not, write to the Free Software |
| Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "cpplib.h" |
| #include "cpphash.h" |
| #include "prefix.h" |
| #include "intl.h" |
| #include "mkdeps.h" |
| #include "cppdefault.h" |
| |
| /* Windows does not natively support inodes, and neither does MSDOS. |
| Cygwin's emulation can generate non-unique inodes, so don't use it. |
| VMS has non-numeric inodes. */ |
| #ifdef VMS |
| # define INO_T_EQ(A, B) (!memcmp (&(A), &(B), sizeof (A))) |
| # define INO_T_COPY(DEST, SRC) memcpy(&(DEST), &(SRC), sizeof (SRC)) |
| #else |
| # if (defined _WIN32 && ! defined (_UWIN)) || defined __MSDOS__ |
| # define INO_T_EQ(A, B) 0 |
| # else |
| # define INO_T_EQ(A, B) ((A) == (B)) |
| # endif |
| # define INO_T_COPY(DEST, SRC) (DEST) = (SRC) |
| #endif |
| |
| /* Internal structures and prototypes. */ |
| |
| /* A `struct pending_option' remembers one -D, -A, -U, -include, or |
| -imacros switch. */ |
| typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *)); |
| struct pending_option |
| { |
| struct pending_option *next; |
| const char *arg; |
| cl_directive_handler handler; |
| }; |
| |
| /* The `pending' structure accumulates all the options that are not |
| actually processed until we hit cpp_read_main_file. It consists of |
| several lists, one for each type of option. We keep both head and |
| tail pointers for quick insertion. */ |
| struct cpp_pending |
| { |
| struct pending_option *directive_head, *directive_tail; |
| |
| struct search_path *quote_head, *quote_tail; |
| struct search_path *brack_head, *brack_tail; |
| struct search_path *systm_head, *systm_tail; |
| struct search_path *after_head, *after_tail; |
| |
| struct pending_option *imacros_head, *imacros_tail; |
| struct pending_option *include_head, *include_tail; |
| }; |
| |
| #ifdef __STDC__ |
| #define APPEND(pend, list, elt) \ |
| do { if (!(pend)->list##_head) (pend)->list##_head = (elt); \ |
| else (pend)->list##_tail->next = (elt); \ |
| (pend)->list##_tail = (elt); \ |
| } while (0) |
| #else |
| #define APPEND(pend, list, elt) \ |
| do { if (!(pend)->list/**/_head) (pend)->list/**/_head = (elt); \ |
| else (pend)->list/**/_tail->next = (elt); \ |
| (pend)->list/**/_tail = (elt); \ |
| } while (0) |
| #endif |
| |
| static void path_include PARAMS ((cpp_reader *, |
| char *, int)); |
| static void init_library PARAMS ((void)); |
| static void init_builtins PARAMS ((cpp_reader *)); |
| static void mark_named_operators PARAMS ((cpp_reader *)); |
| static void append_include_chain PARAMS ((cpp_reader *, |
| char *, int, int)); |
| static struct search_path * remove_dup_dir PARAMS ((cpp_reader *, |
| struct search_path *, |
| struct search_path **)); |
| static struct search_path * remove_dup_nonsys_dirs PARAMS ((cpp_reader *, |
| struct search_path **, |
| struct search_path *)); |
| static struct search_path * remove_dup_dirs PARAMS ((cpp_reader *, |
| struct search_path **)); |
| static void merge_include_chains PARAMS ((cpp_reader *)); |
| static bool push_include PARAMS ((cpp_reader *, |
| struct pending_option *)); |
| static void free_chain PARAMS ((struct pending_option *)); |
| static void init_standard_includes PARAMS ((cpp_reader *)); |
| static void read_original_filename PARAMS ((cpp_reader *)); |
| static void new_pending_directive PARAMS ((struct cpp_pending *, |
| const char *, |
| cl_directive_handler)); |
| static int parse_option PARAMS ((const char *)); |
| static void post_options PARAMS ((cpp_reader *)); |
| |
| /* Fourth argument to append_include_chain: chain to use. |
| Note it's never asked to append to the quote chain. */ |
| enum { BRACKET = 0, SYSTEM, AFTER }; |
| |
| /* If we have designated initializers (GCC >2.7) these tables can be |
| initialized, constant data. Otherwise, they have to be filled in at |
| runtime. */ |
| #if HAVE_DESIGNATED_INITIALIZERS |
| |
| #define init_trigraph_map() /* Nothing. */ |
| #define TRIGRAPH_MAP \ |
| __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { |
| |
| #define END }; |
| #define s(p, v) [p] = v, |
| |
| #else |
| |
| #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \ |
| static void init_trigraph_map PARAMS ((void)) { \ |
| unsigned char *x = _cpp_trigraph_map; |
| |
| #define END } |
| #define s(p, v) x[p] = v; |
| |
| #endif |
| |
| TRIGRAPH_MAP |
| s('=', '#') s(')', ']') s('!', '|') |
| s('(', '[') s('\'', '^') s('>', '}') |
| s('/', '\\') s('<', '{') s('-', '~') |
| END |
| |
| #undef s |
| #undef END |
| #undef TRIGRAPH_MAP |
| |
| /* Given a colon-separated list of file names PATH, |
| add all the names to the search path for include files. */ |
| static void |
| path_include (pfile, list, path) |
| cpp_reader *pfile; |
| char *list; |
| int path; |
| { |
| char *p, *q, *name; |
| |
| p = list; |
| |
| do |
| { |
| /* Find the end of this name. */ |
| q = p; |
| while (*q != 0 && *q != PATH_SEPARATOR) q++; |
| if (q == p) |
| { |
| /* An empty name in the path stands for the current directory. */ |
| name = (char *) xmalloc (2); |
| name[0] = '.'; |
| name[1] = 0; |
| } |
| else |
| { |
| /* Otherwise use the directory that is named. */ |
| name = (char *) xmalloc (q - p + 1); |
| memcpy (name, p, q - p); |
| name[q - p] = 0; |
| } |
| |
| append_include_chain (pfile, name, path, path == SYSTEM); |
| |
| /* Advance past this name. */ |
| if (*q == 0) |
| break; |
| p = q + 1; |
| } |
| while (1); |
| } |
| |
| /* Append DIR to include path PATH. DIR must be allocated on the |
| heap; this routine takes responsibility for freeing it. CXX_AWARE |
| is nonzero if the header contains extern "C" guards for C++, |
| otherwise it is zero. */ |
| static void |
| append_include_chain (pfile, dir, path, cxx_aware) |
| cpp_reader *pfile; |
| char *dir; |
| int path; |
| int cxx_aware; |
| { |
| struct cpp_pending *pend = CPP_OPTION (pfile, pending); |
| struct search_path *new; |
| struct stat st; |
| unsigned int len; |
| |
| if (*dir == '\0') |
| { |
| free (dir); |
| dir = xstrdup ("."); |
| } |
| _cpp_simplify_pathname (dir); |
| |
| if (stat (dir, &st)) |
| { |
| /* Dirs that don't exist are silently ignored. */ |
| if (errno != ENOENT) |
| cpp_errno (pfile, DL_ERROR, dir); |
| else if (CPP_OPTION (pfile, verbose)) |
| fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"), dir); |
| free (dir); |
| return; |
| } |
| |
| if (!S_ISDIR (st.st_mode)) |
| { |
| cpp_error_with_line (pfile, DL_ERROR, 0, 0, "%s: Not a directory", dir); |
| free (dir); |
| return; |
| } |
| |
| len = strlen (dir); |
| if (len > pfile->max_include_len) |
| pfile->max_include_len = len; |
| |
| new = (struct search_path *) xmalloc (sizeof (struct search_path)); |
| new->name = dir; |
| new->len = len; |
| INO_T_COPY (new->ino, st.st_ino); |
| new->dev = st.st_dev; |
| /* Both systm and after include file lists should be treated as system |
| include files since these two lists are really just a concatenation |
| of one "system" list. */ |
| if (path == SYSTEM || path == AFTER) |
| new->sysp = cxx_aware ? 1 : 2; |
| else |
| new->sysp = 0; |
| new->name_map = NULL; |
| new->next = NULL; |
| |
| switch (path) |
| { |
| case BRACKET: APPEND (pend, brack, new); break; |
| case SYSTEM: APPEND (pend, systm, new); break; |
| case AFTER: APPEND (pend, after, new); break; |
| } |
| } |
| |
| /* Handle a duplicated include path. PREV is the link in the chain |
| before the duplicate, or NULL if the duplicate is at the head of |
| the chain. The duplicate is removed from the chain and freed. |
| Returns PREV. */ |
| static struct search_path * |
| remove_dup_dir (pfile, prev, head_ptr) |
| cpp_reader *pfile; |
| struct search_path *prev; |
| struct search_path **head_ptr; |
| { |
| struct search_path *cur; |
| |
| if (prev != NULL) |
| { |
| cur = prev->next; |
| prev->next = cur->next; |
| } |
| else |
| { |
| cur = *head_ptr; |
| *head_ptr = cur->next; |
| } |
| |
| if (CPP_OPTION (pfile, verbose)) |
| fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), cur->name); |
| |
| free ((PTR) cur->name); |
| free (cur); |
| |
| return prev; |
| } |
| |
| /* Remove duplicate non-system directories for which there is an equivalent |
| system directory latter in the chain. The range for removal is between |
| *HEAD_PTR and END. Returns the directory before END, or NULL if none. |
| This algorithm is quadratic in the number system directories, which is |
| acceptable since there aren't usually that many of them. */ |
| static struct search_path * |
| remove_dup_nonsys_dirs (pfile, head_ptr, end) |
| cpp_reader *pfile; |
| struct search_path **head_ptr; |
| struct search_path *end; |
| { |
| int sysdir = 0; |
| struct search_path *prev = NULL, *cur, *other; |
| |
| for (cur = *head_ptr; cur; cur = cur->next) |
| { |
| if (cur->sysp) |
| { |
| sysdir = 1; |
| for (other = *head_ptr, prev = NULL; |
| other != end; |
| other = other ? other->next : *head_ptr) |
| { |
| if (!other->sysp |
| && INO_T_EQ (cur->ino, other->ino) |
| && cur->dev == other->dev) |
| { |
| other = remove_dup_dir (pfile, prev, head_ptr); |
| if (CPP_OPTION (pfile, verbose)) |
| fprintf (stderr, |
| _(" as it is a non-system directory that duplicates a system directory\n")); |
| } |
| prev = other; |
| } |
| } |
| } |
| |
| if (!sysdir) |
| for (cur = *head_ptr; cur != end; cur = cur->next) |
| prev = cur; |
| |
| return prev; |
| } |
| |
| /* Remove duplicate directories from a chain. Returns the tail of the |
| chain, or NULL if the chain is empty. This algorithm is quadratic |
| in the number of -I switches, which is acceptable since there |
| aren't usually that many of them. */ |
| static struct search_path * |
| remove_dup_dirs (pfile, head_ptr) |
| cpp_reader *pfile; |
| struct search_path **head_ptr; |
| { |
| struct search_path *prev = NULL, *cur, *other; |
| |
| for (cur = *head_ptr; cur; cur = cur->next) |
| { |
| for (other = *head_ptr; other != cur; other = other->next) |
| if (INO_T_EQ (cur->ino, other->ino) && cur->dev == other->dev) |
| { |
| cur = remove_dup_dir (pfile, prev, head_ptr); |
| break; |
| } |
| prev = cur; |
| } |
| |
| return prev; |
| } |
| |
| /* Merge the four include chains together in the order quote, bracket, |
| system, after. Remove duplicate dirs (as determined by |
| INO_T_EQ()). The system_include and after_include chains are never |
| referred to again after this function; all access is through the |
| bracket_include path. */ |
| static void |
| merge_include_chains (pfile) |
| cpp_reader *pfile; |
| { |
| struct search_path *quote, *brack, *systm, *qtail; |
| |
| struct cpp_pending *pend = CPP_OPTION (pfile, pending); |
| |
| quote = pend->quote_head; |
| brack = pend->brack_head; |
| systm = pend->systm_head; |
| qtail = pend->quote_tail; |
| |
| /* Paste together bracket, system, and after include chains. */ |
| if (systm) |
| pend->systm_tail->next = pend->after_head; |
| else |
| systm = pend->after_head; |
| |
| if (brack) |
| pend->brack_tail->next = systm; |
| else |
| brack = systm; |
| |
| /* This is a bit tricky. First we drop non-system dupes of system |
| directories from the merged bracket-include list. Next we drop |
| dupes from the bracket and quote include lists. Then we drop |
| non-system dupes from the merged quote-include list. Finally, |
| if qtail and brack are the same directory, we cut out brack and |
| move brack up to point to qtail. |
| |
| We can't just merge the lists and then uniquify them because |
| then we may lose directories from the <> search path that should |
| be there; consider -Ifoo -Ibar -I- -Ifoo -Iquux. It is however |
| safe to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written |
| -Ibar -I- -Ifoo -Iquux. */ |
| |
| remove_dup_nonsys_dirs (pfile, &brack, systm); |
| remove_dup_dirs (pfile, &brack); |
| |
| if (quote) |
| { |
| qtail = remove_dup_dirs (pfile, "e); |
| qtail->next = brack; |
| |
| qtail = remove_dup_nonsys_dirs (pfile, "e, brack); |
| |
| /* If brack == qtail, remove brack as it's simpler. */ |
| if (qtail && brack && INO_T_EQ (qtail->ino, brack->ino) |
| && qtail->dev == brack->dev) |
| brack = remove_dup_dir (pfile, qtail, "e); |
| } |
| else |
| quote = brack; |
| |
| CPP_OPTION (pfile, quote_include) = quote; |
| CPP_OPTION (pfile, bracket_include) = brack; |
| } |
| |
| /* A set of booleans indicating what CPP features each source language |
| requires. */ |
| struct lang_flags |
| { |
| char c99; |
| char cplusplus; |
| char extended_numbers; |
| char std; |
| char dollars_in_ident; |
| char cplusplus_comments; |
| char digraphs; |
| }; |
| |
| /* ??? Enable $ in identifiers in assembly? */ |
| static const struct lang_flags lang_defaults[] = |
| { /* c99 c++ xnum std dollar c++comm digr */ |
| /* GNUC89 */ { 0, 0, 1, 0, 1, 1, 1 }, |
| /* GNUC99 */ { 1, 0, 1, 0, 1, 1, 1 }, |
| /* STDC89 */ { 0, 0, 0, 1, 0, 0, 0 }, |
| /* STDC94 */ { 0, 0, 0, 1, 0, 0, 1 }, |
| /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1 }, |
| /* GNUCXX */ { 0, 1, 1, 0, 1, 1, 1 }, |
| /* CXX98 */ { 0, 1, 1, 1, 0, 1, 1 }, |
| /* ASM */ { 0, 0, 1, 0, 0, 1, 0 } |
| }; |
| |
| /* Sets internal flags correctly for a given language. */ |
| void |
| cpp_set_lang (pfile, lang) |
| cpp_reader *pfile; |
| enum c_lang lang; |
| { |
| const struct lang_flags *l = &lang_defaults[(int) lang]; |
| |
| CPP_OPTION (pfile, lang) = lang; |
| |
| CPP_OPTION (pfile, c99) = l->c99; |
| CPP_OPTION (pfile, cplusplus) = l->cplusplus; |
| CPP_OPTION (pfile, extended_numbers) = l->extended_numbers; |
| CPP_OPTION (pfile, std) = l->std; |
| CPP_OPTION (pfile, trigraphs) = l->std; |
| CPP_OPTION (pfile, dollars_in_ident) = l->dollars_in_ident; |
| CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments; |
| CPP_OPTION (pfile, digraphs) = l->digraphs; |
| } |
| |
| #ifdef HOST_EBCDIC |
| static int opt_comp PARAMS ((const void *, const void *)); |
| |
| /* Run-time sorting of options array. */ |
| static int |
| opt_comp (p1, p2) |
| const void *p1, *p2; |
| { |
| return strcmp (((struct cl_option *) p1)->opt_text, |
| ((struct cl_option *) p2)->opt_text); |
| } |
| #endif |
| |
| /* init initializes library global state. It might not need to |
| do anything depending on the platform and compiler. */ |
| static void |
| init_library () |
| { |
| static int initialized = 0; |
| |
| if (! initialized) |
| { |
| initialized = 1; |
| |
| #ifdef HOST_EBCDIC |
| /* For non-ASCII hosts, the cl_options array needs to be sorted at |
| runtime. */ |
| qsort (cl_options, N_OPTS, sizeof (struct cl_option), opt_comp); |
| #endif |
| |
| /* Set up the trigraph map. This doesn't need to do anything if |
| we were compiled with a compiler that supports C99 designated |
| initializers. */ |
| init_trigraph_map (); |
| } |
| } |
| |
| /* Initialize a cpp_reader structure. */ |
| cpp_reader * |
| cpp_create_reader (lang) |
| enum c_lang lang; |
| { |
| cpp_reader *pfile; |
| |
| /* Initialize this instance of the library if it hasn't been already. */ |
| init_library (); |
| |
| pfile = (cpp_reader *) xcalloc (1, sizeof (cpp_reader)); |
| |
| cpp_set_lang (pfile, lang); |
| CPP_OPTION (pfile, warn_import) = 1; |
| CPP_OPTION (pfile, warn_multichar) = 1; |
| CPP_OPTION (pfile, discard_comments) = 1; |
| CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1; |
| CPP_OPTION (pfile, show_column) = 1; |
| CPP_OPTION (pfile, tabstop) = 8; |
| CPP_OPTION (pfile, operator_names) = 1; |
| CPP_OPTION (pfile, warn_endif_labels) = 1; |
| CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99); |
| CPP_OPTION (pfile, sysroot) = cpp_SYSROOT; |
| |
| CPP_OPTION (pfile, pending) = |
| (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending)); |
| |
| /* Default CPP arithmetic to something sensible for the host for the |
| benefit of dumb users like fix-header. */ |
| CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long); |
| CPP_OPTION (pfile, char_precision) = CHAR_BIT; |
| CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int); |
| CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int); |
| CPP_OPTION (pfile, unsigned_char) = 0; |
| CPP_OPTION (pfile, unsigned_wchar) = 1; |
| |
| /* Initialize the line map. Start at logical line 1, so we can use |
| a line number of zero for special states. */ |
| init_line_maps (&pfile->line_maps); |
| pfile->line = 1; |
| |
| /* Initialize lexer state. */ |
| pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments); |
| |
| /* Set up static tokens. */ |
| pfile->avoid_paste.type = CPP_PADDING; |
| pfile->avoid_paste.val.source = NULL; |
| pfile->eof.type = CPP_EOF; |
| pfile->eof.flags = 0; |
| |
| /* Create a token buffer for the lexer. */ |
| _cpp_init_tokenrun (&pfile->base_run, 250); |
| pfile->cur_run = &pfile->base_run; |
| pfile->cur_token = pfile->base_run.base; |
| |
| /* Initialize the base context. */ |
| pfile->context = &pfile->base_context; |
| pfile->base_context.macro = 0; |
| pfile->base_context.prev = pfile->base_context.next = 0; |
| |
| /* Aligned and unaligned storage. */ |
| pfile->a_buff = _cpp_get_buff (pfile, 0); |
| pfile->u_buff = _cpp_get_buff (pfile, 0); |
| |
| /* The expression parser stack. */ |
| _cpp_expand_op_stack (pfile); |
| |
| /* Initialize the buffer obstack. */ |
| gcc_obstack_init (&pfile->buffer_ob); |
| |
| _cpp_init_includes (pfile); |
| |
| return pfile; |
| } |
| |
| /* Free resources used by PFILE. Accessing PFILE after this function |
| returns leads to undefined behavior. Returns the error count. */ |
| void |
| cpp_destroy (pfile) |
| cpp_reader *pfile; |
| { |
| struct search_path *dir, *dirn; |
| cpp_context *context, *contextn; |
| tokenrun *run, *runn; |
| |
| free_chain (CPP_OPTION (pfile, pending)->include_head); |
| free (CPP_OPTION (pfile, pending)); |
| free (pfile->op_stack); |
| |
| while (CPP_BUFFER (pfile) != NULL) |
| _cpp_pop_buffer (pfile); |
| |
| if (pfile->out.base) |
| free (pfile->out.base); |
| |
| if (pfile->macro_buffer) |
| { |
| free ((PTR) pfile->macro_buffer); |
| pfile->macro_buffer = NULL; |
| pfile->macro_buffer_len = 0; |
| } |
| |
| if (pfile->deps) |
| deps_free (pfile->deps); |
| obstack_free (&pfile->buffer_ob, 0); |
| |
| _cpp_destroy_hashtable (pfile); |
| _cpp_cleanup_includes (pfile); |
| |
| _cpp_free_buff (pfile->a_buff); |
| _cpp_free_buff (pfile->u_buff); |
| _cpp_free_buff (pfile->free_buffs); |
| |
| for (run = &pfile->base_run; run; run = runn) |
| { |
| runn = run->next; |
| free (run->base); |
| if (run != &pfile->base_run) |
| free (run); |
| } |
| |
| for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn) |
| { |
| dirn = dir->next; |
| free ((PTR) dir->name); |
| free (dir); |
| } |
| |
| for (context = pfile->base_context.next; context; context = contextn) |
| { |
| contextn = context->next; |
| free (context); |
| } |
| |
| free_line_maps (&pfile->line_maps); |
| free (pfile); |
| } |
| |
| /* This structure defines one built-in identifier. A node will be |
| entered in the hash table under the name NAME, with value VALUE. |
| |
| There are two tables of these. builtin_array holds all the |
| "builtin" macros: these are handled by builtin_macro() in |
| cppmacro.c. Builtin is somewhat of a misnomer -- the property of |
| interest is that these macros require special code to compute their |
| expansions. The value is a "builtin_type" enumerator. |
| |
| operator_array holds the C++ named operators. These are keywords |
| which act as aliases for punctuators. In C++, they cannot be |
| altered through #define, and #if recognizes them as operators. In |
| C, these are not entered into the hash table at all (but see |
| <iso646.h>). The value is a token-type enumerator. */ |
| struct builtin |
| { |
| const uchar *name; |
| unsigned short len; |
| unsigned short value; |
| }; |
| |
| #define B(n, t) { DSC(n), t } |
| static const struct builtin builtin_array[] = |
| { |
| B("__TIME__", BT_TIME), |
| B("__DATE__", BT_DATE), |
| B("__FILE__", BT_FILE), |
| B("__BASE_FILE__", BT_BASE_FILE), |
| B("__LINE__", BT_SPECLINE), |
| B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL), |
| /* Keep builtins not used for -traditional-cpp at the end, and |
| update init_builtins() if any more are added. */ |
| B("_Pragma", BT_PRAGMA), |
| B("__STDC__", BT_STDC), |
| }; |
| |
| static const struct builtin operator_array[] = |
| { |
| B("and", CPP_AND_AND), |
| B("and_eq", CPP_AND_EQ), |
| B("bitand", CPP_AND), |
| B("bitor", CPP_OR), |
| B("compl", CPP_COMPL), |
| B("not", CPP_NOT), |
| B("not_eq", CPP_NOT_EQ), |
| B("or", CPP_OR_OR), |
| B("or_eq", CPP_OR_EQ), |
| B("xor", CPP_XOR), |
| B("xor_eq", CPP_XOR_EQ) |
| }; |
| #undef B |
| |
| /* Mark the C++ named operators in the hash table. */ |
| static void |
| mark_named_operators (pfile) |
| cpp_reader *pfile; |
| { |
| const struct builtin *b; |
| |
| for (b = operator_array; |
| b < (operator_array + ARRAY_SIZE (operator_array)); |
| b++) |
| { |
| cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
| hp->flags |= NODE_OPERATOR; |
| hp->value.operator = b->value; |
| } |
| } |
| |
| /* Subroutine of cpp_read_main_file; reads the builtins table above and |
| enters them, and language-specific macros, into the hash table. */ |
| static void |
| init_builtins (pfile) |
| cpp_reader *pfile; |
| { |
| const struct builtin *b; |
| size_t n = ARRAY_SIZE (builtin_array); |
| |
| if (CPP_OPTION (pfile, traditional)) |
| n -= 2; |
| |
| for(b = builtin_array; b < builtin_array + n; b++) |
| { |
| cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len); |
| hp->type = NT_MACRO; |
| hp->flags |= NODE_BUILTIN | NODE_WARN; |
| hp->value.builtin = b->value; |
| } |
| |
| if (CPP_OPTION (pfile, cplusplus)) |
| _cpp_define_builtin (pfile, "__cplusplus 1"); |
| else if (CPP_OPTION (pfile, lang) == CLK_ASM) |
| _cpp_define_builtin (pfile, "__ASSEMBLER__ 1"); |
| else if (CPP_OPTION (pfile, lang) == CLK_STDC94) |
| _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L"); |
| else if (CPP_OPTION (pfile, c99)) |
| _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L"); |
| |
| if (CPP_OPTION (pfile, objc)) |
| _cpp_define_builtin (pfile, "__OBJC__ 1"); |
| |
| if (pfile->cb.register_builtins) |
| (*pfile->cb.register_builtins) (pfile); |
| } |
| |
| /* And another subroutine. This one sets up the standard include path. */ |
| static void |
| init_standard_includes (pfile) |
| cpp_reader *pfile; |
| { |
| char *path; |
| const struct default_include *p; |
| const char *specd_prefix = CPP_OPTION (pfile, include_prefix); |
| int default_len, specd_len; |
| char *default_prefix; |
| |
| /* Several environment variables may add to the include search path. |
| CPATH specifies an additional list of directories to be searched |
| as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH, |
| etc. specify an additional list of directories to be searched as |
| if specified with -isystem, for the language indicated. */ |
| |
| GET_ENVIRONMENT (path, "CPATH"); |
| if (path != 0 && *path != 0) |
| path_include (pfile, path, BRACKET); |
| |
| switch ((CPP_OPTION (pfile, objc) << 1) + CPP_OPTION (pfile, cplusplus)) |
| { |
| case 0: |
| GET_ENVIRONMENT (path, "C_INCLUDE_PATH"); |
| break; |
| case 1: |
| GET_ENVIRONMENT (path, "CPLUS_INCLUDE_PATH"); |
| break; |
| case 2: |
| GET_ENVIRONMENT (path, "OBJC_INCLUDE_PATH"); |
| break; |
| case 3: |
| GET_ENVIRONMENT (path, "OBJCPLUS_INCLUDE_PATH"); |
| break; |
| } |
| if (path != 0 && *path != 0) |
| path_include (pfile, path, SYSTEM); |
| |
| /* Search "translated" versions of GNU directories. |
| These have /usr/local/lib/gcc... replaced by specd_prefix. */ |
| default_len = 0; |
| specd_len = 0; |
| default_prefix = NULL; |
| if (specd_prefix != 0 && cpp_GCC_INCLUDE_DIR_len) |
| { |
| /* Remove the `include' from /usr/local/lib/gcc.../include. |
| GCC_INCLUDE_DIR will always end in /include. */ |
| default_len = cpp_GCC_INCLUDE_DIR_len; |
| default_prefix = (char *) alloca (default_len + 1); |
| specd_len = strlen (specd_prefix); |
| |
| memcpy (default_prefix, cpp_GCC_INCLUDE_DIR, default_len); |
| default_prefix[default_len] = '\0'; |
| |
| for (p = cpp_include_defaults; p->fname; p++) |
| { |
| /* Some standard dirs are only for C++. */ |
| if (!p->cplusplus |
| || (CPP_OPTION (pfile, cplusplus) |
| && !CPP_OPTION (pfile, no_standard_cplusplus_includes))) |
| { |
| char *str; |
| |
| /* Should we be translating sysrooted dirs too? Assume |
| that iprefix and sysroot are mutually exclusive, for |
| now. */ |
| if (p->add_sysroot && CPP_OPTION (pfile, sysroot) |
| && *(CPP_OPTION (pfile, sysroot))) |
| continue; |
| |
| /* Does this dir start with the prefix? */ |
| if (!strncmp (p->fname, default_prefix, default_len)) |
| { |
| /* Yes; change prefix and add to search list. */ |
| int flen = strlen (p->fname); |
| int this_len = specd_len + flen - default_len; |
| |
| str = (char *) xmalloc (this_len + 1); |
| memcpy (str, specd_prefix, specd_len); |
| memcpy (str + specd_len, |
| p->fname + default_len, |
| flen - default_len + 1); |
| |
| append_include_chain (pfile, str, SYSTEM, p->cxx_aware); |
| } |
| } |
| } |
| } |
| |
| for (p = cpp_include_defaults; p->fname; p++) |
| { |
| /* Some standard dirs are only for C++. */ |
| if (!p->cplusplus |
| || (CPP_OPTION (pfile, cplusplus) |
| && !CPP_OPTION (pfile, no_standard_cplusplus_includes))) |
| { |
| char *str; |
| |
| /* Should this dir start with the sysroot? */ |
| if (p->add_sysroot && CPP_OPTION (pfile, sysroot) |
| && *(CPP_OPTION (pfile, sysroot))) |
| str = concat (CPP_OPTION (pfile, sysroot), p->fname, NULL); |
| |
| else |
| str = update_path (p->fname, p->component); |
| |
| append_include_chain (pfile, str, SYSTEM, p->cxx_aware); |
| } |
| } |
| } |
| |
| /* Pushes a command line -imacro and -include file indicated by P onto |
| the buffer stack. Returns nonzero if successful. */ |
| static bool |
| push_include (pfile, p) |
| cpp_reader *pfile; |
| struct pending_option *p; |
| { |
| cpp_token header; |
| |
| /* Later: maybe update this to use the #include "" search path |
| if cpp_read_file fails. */ |
| header.type = CPP_STRING; |
| header.val.str.text = (const unsigned char *) p->arg; |
| header.val.str.len = strlen (p->arg); |
| /* Make the command line directive take up a line. */ |
| pfile->line++; |
| |
| return _cpp_execute_include (pfile, &header, IT_CMDLINE); |
| } |
| |
| /* Frees a pending_option chain. */ |
| static void |
| free_chain (head) |
| struct pending_option *head; |
| { |
| struct pending_option *next; |
| |
| while (head) |
| { |
| next = head->next; |
| free (head); |
| head = next; |
| } |
| } |
| |
| /* Sanity-checks are dependent on command-line options, so it is |
| called as a subroutine of cpp_read_main_file (). */ |
| #if ENABLE_CHECKING |
| static void sanity_checks PARAMS ((cpp_reader *)); |
| static void sanity_checks (pfile) |
| cpp_reader *pfile; |
| { |
| cppchar_t test = 0; |
| size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part); |
| |
| /* Sanity checks for assumptions about CPP arithmetic and target |
| type precisions made by cpplib. */ |
| test--; |
| if (test < 1) |
| cpp_error (pfile, DL_ICE, "cppchar_t must be an unsigned type"); |
| |
| if (CPP_OPTION (pfile, precision) > max_precision) |
| cpp_error (pfile, DL_ICE, |
| "preprocessor arithmetic has maximum precision of %lu bits; target requires %lu bits", |
| (unsigned long) max_precision, |
| (unsigned long) CPP_OPTION (pfile, precision)); |
| |
| if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision)) |
| cpp_error (pfile, DL_ICE, |
| "CPP arithmetic must be at least as precise as a target int"); |
| |
| if (CPP_OPTION (pfile, char_precision) < 8) |
| cpp_error (pfile, DL_ICE, "target char is less than 8 bits wide"); |
| |
| if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision)) |
| cpp_error (pfile, DL_ICE, |
| "target wchar_t is narrower than target char"); |
| |
| if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision)) |
| cpp_error (pfile, DL_ICE, |
| "target int is narrower than target char"); |
| |
| /* This is assumed in eval_token() and could be fixed if necessary. */ |
| if (sizeof (cppchar_t) > sizeof (cpp_num_part)) |
| cpp_error (pfile, DL_ICE, "CPP half-integer narrower than CPP character"); |
| |
| if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T) |
| cpp_error (pfile, DL_ICE, |
| "CPP on this host cannot handle wide character constants over %lu bits, but the target requires %lu bits", |
| (unsigned long) BITS_PER_CPPCHAR_T, |
| (unsigned long) CPP_OPTION (pfile, wchar_precision)); |
| } |
| #else |
| # define sanity_checks(PFILE) |
| #endif |
| |
| /* Add a dependency target. Can be called any number of times before |
| cpp_read_main_file(). If no targets have been added before |
| cpp_read_main_file(), then the default target is used. */ |
| void |
| cpp_add_dependency_target (pfile, target, quote) |
| cpp_reader *pfile; |
| const char *target; |
| int quote; |
| { |
| if (!pfile->deps) |
| pfile->deps = deps_init (); |
| |
| deps_add_target (pfile->deps, target, quote); |
| } |
| |
| /* This is called after options have been parsed, and partially |
| processed. Setup for processing input from the file named FNAME, |
| or stdin if it is the empty string. Return the original filename |
| on success (e.g. foo.i->foo.c), or NULL on failure. */ |
| const char * |
| cpp_read_main_file (pfile, fname, table) |
| cpp_reader *pfile; |
| const char *fname; |
| hash_table *table; |
| { |
| sanity_checks (pfile); |
| |
| post_options (pfile); |
| |
| /* The front ends don't set up the hash table until they have |
| finished processing the command line options, so initializing the |
| hashtable is deferred until now. */ |
| _cpp_init_hashtable (pfile, table); |
| |
| /* Set up the include search path now. */ |
| if (! CPP_OPTION (pfile, no_standard_includes)) |
| init_standard_includes (pfile); |
| |
| merge_include_chains (pfile); |
| |
| /* With -v, print the list of dirs to search. */ |
| if (CPP_OPTION (pfile, verbose)) |
| { |
| struct search_path *l; |
| fprintf (stderr, _("#include \"...\" search starts here:\n")); |
| for (l = CPP_OPTION (pfile, quote_include); l; l = l->next) |
| { |
| if (l == CPP_OPTION (pfile, bracket_include)) |
| fprintf (stderr, _("#include <...> search starts here:\n")); |
| fprintf (stderr, " %s\n", l->name); |
| } |
| fprintf (stderr, _("End of search list.\n")); |
| } |
| |
| if (CPP_OPTION (pfile, deps.style) != DEPS_NONE) |
| { |
| if (!pfile->deps) |
| pfile->deps = deps_init (); |
| |
| /* Set the default target (if there is none already). */ |
| deps_add_default_target (pfile->deps, fname); |
| } |
| |
| /* Open the main input file. */ |
| if (!_cpp_read_file (pfile, fname)) |
| return NULL; |
| |
| /* Set this here so the client can change the option if it wishes, |
| and after stacking the main file so we don't trace the main |
| file. */ |
| pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names); |
| |
| /* For foo.i, read the original filename foo.c now, for the benefit |
| of the front ends. */ |
| if (CPP_OPTION (pfile, preprocessed)) |
| read_original_filename (pfile); |
| |
| return pfile->map->to_file; |
| } |
| |
| /* For preprocessed files, if the first tokens are of the form # NUM. |
| handle the directive so we know the original file name. This will |
| generate file_change callbacks, which the front ends must handle |
| appropriately given their state of initialization. */ |
| static void |
| read_original_filename (pfile) |
| cpp_reader *pfile; |
| { |
| const cpp_token *token, *token1; |
| |
| /* Lex ahead; if the first tokens are of the form # NUM, then |
| process the directive, otherwise back up. */ |
| token = _cpp_lex_direct (pfile); |
| if (token->type == CPP_HASH) |
| { |
| token1 = _cpp_lex_direct (pfile); |
| _cpp_backup_tokens (pfile, 1); |
| |
| /* If it's a #line directive, handle it. */ |
| if (token1->type == CPP_NUMBER) |
| { |
| _cpp_handle_directive (pfile, token->flags & PREV_WHITE); |
| return; |
| } |
| } |
| |
| /* Backup as if nothing happened. */ |
| _cpp_backup_tokens (pfile, 1); |
| } |
| |
| /* Handle pending command line options: -D, -U, -A, -imacros and |
| -include. This should be called after debugging has been properly |
| set up in the front ends. */ |
| void |
| cpp_finish_options (pfile) |
| cpp_reader *pfile; |
| { |
| /* Mark named operators before handling command line macros. */ |
| if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names)) |
| mark_named_operators (pfile); |
| |
| /* Install builtins and process command line macros etc. in the order |
| they appeared, but only if not already preprocessed. */ |
| if (! CPP_OPTION (pfile, preprocessed)) |
| { |
| struct pending_option *p; |
| |
| /* Prevent -Wunused-macros with command-line redefinitions. */ |
| pfile->first_unused_line = (unsigned int) -1; |
| _cpp_do_file_change (pfile, LC_RENAME, _("<built-in>"), 1, 0); |
| init_builtins (pfile); |
| _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0); |
| for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next) |
| (*p->handler) (pfile, p->arg); |
| |
| /* Scan -imacros files after -D, -U, but before -include. |
| pfile->next_include_file is NULL, so _cpp_pop_buffer does not |
| push -include files. */ |
| for (p = CPP_OPTION (pfile, pending)->imacros_head; p; p = p->next) |
| if (push_include (pfile, p)) |
| cpp_scan_nooutput (pfile); |
| |
| pfile->next_include_file = &CPP_OPTION (pfile, pending)->include_head; |
| _cpp_maybe_push_include_file (pfile); |
| } |
| |
| pfile->first_unused_line = pfile->line; |
| |
| free_chain (CPP_OPTION (pfile, pending)->imacros_head); |
| free_chain (CPP_OPTION (pfile, pending)->directive_head); |
| } |
| |
| /* Push the next buffer on the stack given by -include, if any. */ |
| void |
| _cpp_maybe_push_include_file (pfile) |
| cpp_reader *pfile; |
| { |
| if (pfile->next_include_file) |
| { |
| struct pending_option *head = *pfile->next_include_file; |
| |
| while (head && !push_include (pfile, head)) |
| head = head->next; |
| |
| if (head) |
| pfile->next_include_file = &head->next; |
| else |
| { |
| /* All done; restore the line map from <command line>. */ |
| _cpp_do_file_change (pfile, LC_RENAME, |
| pfile->line_maps.maps[0].to_file, 1, 0); |
| /* Don't come back here again. */ |
| pfile->next_include_file = NULL; |
| } |
| } |
| } |
| |
| /* This is called at the end of preprocessing. It pops the last |
| buffer and writes dependency output, and returns the number of |
| errors. |
| |
| Maybe it should also reset state, such that you could call |
| cpp_start_read with a new filename to restart processing. */ |
| int |
| cpp_finish (pfile, deps_stream) |
| cpp_reader *pfile; |
| FILE *deps_stream; |
| { |
| /* Warn about unused macros before popping the final buffer. */ |
| if (CPP_OPTION (pfile, warn_unused_macros)) |
| cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); |
| |
| /* cpplex.c leaves the final buffer on the stack. This it so that |
| it returns an unending stream of CPP_EOFs to the client. If we |
| popped the buffer, we'd dereference a NULL buffer pointer and |
| segfault. It's nice to allow the client to do worry-free excess |
| cpp_get_token calls. */ |
| while (pfile->buffer) |
| _cpp_pop_buffer (pfile); |
| |
| /* Don't write the deps file if there are errors. */ |
| if (CPP_OPTION (pfile, deps.style) != DEPS_NONE |
| && deps_stream && pfile->errors == 0) |
| { |
| deps_write (pfile->deps, deps_stream, 72); |
| |
| if (CPP_OPTION (pfile, deps.phony_targets)) |
| deps_phony_targets (pfile->deps, deps_stream); |
| } |
| |
| /* Report on headers that could use multiple include guards. */ |
| if (CPP_OPTION (pfile, print_include_names)) |
| _cpp_report_missing_guards (pfile); |
| |
| return pfile->errors; |
| } |
| |
| /* Add a directive to be handled later in the initialization phase. */ |
| static void |
| new_pending_directive (pend, text, handler) |
| struct cpp_pending *pend; |
| const char *text; |
| cl_directive_handler handler; |
| { |
| struct pending_option *o = (struct pending_option *) |
| xmalloc (sizeof (struct pending_option)); |
| |
| o->arg = text; |
| o->next = NULL; |
| o->handler = handler; |
| APPEND (pend, directive, o); |
| } |
| |
| /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string"); |
| I.e. a const string initializer with parens around it. That is |
| what N_("string") resolves to, so we make no_* be macros instead. */ |
| #define no_ass N_("assertion missing after %s") |
| #define no_dir N_("directory name missing after %s") |
| #define no_fil N_("file name missing after %s") |
| #define no_mac N_("macro name missing after %s") |
| #define no_pth N_("path name missing after %s") |
| |
| /* This is the list of all command line options, with the leading |
| "-" removed. It must be sorted in ASCII collating order. */ |
| #define COMMAND_LINE_OPTIONS \ |
| DEF_OPT("A", no_ass, OPT_A) \ |
| DEF_OPT("D", no_mac, OPT_D) \ |
| DEF_OPT("I", no_dir, OPT_I) \ |
| DEF_OPT("U", no_mac, OPT_U) \ |
| DEF_OPT("idirafter", no_dir, OPT_idirafter) \ |
| DEF_OPT("imacros", no_fil, OPT_imacros) \ |
| DEF_OPT("include", no_fil, OPT_include) \ |
| DEF_OPT("iprefix", no_pth, OPT_iprefix) \ |
| DEF_OPT("isysroot", no_dir, OPT_isysroot) \ |
| DEF_OPT("isystem", no_dir, OPT_isystem) \ |
| DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \ |
| DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) |
| |
| #define DEF_OPT(text, msg, code) code, |
| enum opt_code |
| { |
| COMMAND_LINE_OPTIONS |
| N_OPTS |
| }; |
| #undef DEF_OPT |
| |
| struct cl_option |
| { |
| const char *opt_text; |
| const char *msg; |
| size_t opt_len; |
| enum opt_code opt_code; |
| }; |
| |
| #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code }, |
| #ifdef HOST_EBCDIC |
| static struct cl_option cl_options[] = |
| #else |
| static const struct cl_option cl_options[] = |
| #endif |
| { |
| COMMAND_LINE_OPTIONS |
| }; |
| #undef DEF_OPT |
| #undef COMMAND_LINE_OPTIONS |
| |
| /* Perform a binary search to find which, if any, option the given |
| command-line matches. Returns its index in the option array, |
| negative on failure. Complications arise since some options can be |
| suffixed with an argument, and multiple complete matches can occur, |
| e.g. -pedantic and -pedantic-errors. */ |
| static int |
| parse_option (input) |
| const char *input; |
| { |
| unsigned int md, mn, mx; |
| size_t opt_len; |
| int comp; |
| |
| mn = 0; |
| mx = N_OPTS; |
| |
| while (mx > mn) |
| { |
| md = (mn + mx) / 2; |
| |
| opt_len = cl_options[md].opt_len; |
| comp = strncmp (input, cl_options[md].opt_text, opt_len); |
| |
| if (comp > 0) |
| mn = md + 1; |
| else if (comp < 0) |
| mx = md; |
| else |
| { |
| if (input[opt_len] == '\0') |
| return md; |
| /* We were passed more text. If the option takes an argument, |
| we may match a later option or we may have been passed the |
| argument. The longest possible option match succeeds. |
| If the option takes no arguments we have not matched and |
| continue the search (e.g. input="stdc++" match was "stdc"). */ |
| mn = md + 1; |
| if (cl_options[md].msg) |
| { |
| /* Scan forwards. If we get an exact match, return it. |
| Otherwise, return the longest option-accepting match. |
| This loops no more than twice with current options. */ |
| mx = md; |
| for (; mn < (unsigned int) N_OPTS; mn++) |
| { |
| opt_len = cl_options[mn].opt_len; |
| if (strncmp (input, cl_options[mn].opt_text, opt_len)) |
| break; |
| if (input[opt_len] == '\0') |
| return mn; |
| if (cl_options[mn].msg) |
| mx = mn; |
| } |
| return mx; |
| } |
| } |
| } |
| |
| return -1; |
| } |
| |
| /* Handle one command-line option in (argc, argv). |
| Can be called multiple times, to handle multiple sets of options. |
| Returns number of strings consumed. */ |
| int |
| cpp_handle_option (pfile, argc, argv) |
| cpp_reader *pfile; |
| int argc; |
| char **argv; |
| { |
| int i = 0; |
| struct cpp_pending *pend = CPP_OPTION (pfile, pending); |
| |
| { |
| enum opt_code opt_code; |
| int opt_index; |
| const char *arg = 0; |
| |
| /* Skip over '-'. */ |
| opt_index = parse_option (&argv[i][1]); |
| if (opt_index < 0) |
| return i; |
| |
| opt_code = cl_options[opt_index].opt_code; |
| if (cl_options[opt_index].msg) |
| { |
| arg = &argv[i][cl_options[opt_index].opt_len + 1]; |
| if (arg[0] == '\0') |
| { |
| arg = argv[++i]; |
| if (!arg) |
| { |
| cpp_error (pfile, DL_ERROR, |
| cl_options[opt_index].msg, argv[i - 1]); |
| return argc; |
| } |
| } |
| } |
| |
| switch (opt_code) |
| { |
| case N_OPTS: /* Shut GCC up. */ |
| break; |
| |
| case OPT_D: |
| new_pending_directive (pend, arg, cpp_define); |
| break; |
| case OPT_iprefix: |
| CPP_OPTION (pfile, include_prefix) = arg; |
| CPP_OPTION (pfile, include_prefix_len) = strlen (arg); |
| break; |
| |
| case OPT_isysroot: |
| CPP_OPTION (pfile, sysroot) = arg; |
| break; |
| |
| case OPT_A: |
| if (arg[0] == '-') |
| new_pending_directive (pend, arg + 1, cpp_unassert); |
| else |
| new_pending_directive (pend, arg, cpp_assert); |
| break; |
| case OPT_U: |
| new_pending_directive (pend, arg, cpp_undef); |
| break; |
| case OPT_I: /* Add directory to path for includes. */ |
| if (!strcmp (arg, "-")) |
| { |
| /* -I- means: |
| Use the preceding -I directories for #include "..." |
| but not #include <...>. |
| Don't search the directory of the present file |
| for #include "...". (Note that -I. -I- is not the same as |
| the default setup; -I. uses the compiler's working dir.) */ |
| if (! CPP_OPTION (pfile, ignore_srcdir)) |
| { |
| pend->quote_head = pend->brack_head; |
| pend->quote_tail = pend->brack_tail; |
| pend->brack_head = 0; |
| pend->brack_tail = 0; |
| CPP_OPTION (pfile, ignore_srcdir) = 1; |
| } |
| else |
| { |
| cpp_error (pfile, DL_ERROR, "-I- specified twice"); |
| return argc; |
| } |
| } |
| else |
| append_include_chain (pfile, xstrdup (arg), BRACKET, 0); |
| break; |
| case OPT_isystem: |
| /* Add directory to beginning of system include path, as a system |
| include directory. */ |
| append_include_chain (pfile, xstrdup (arg), SYSTEM, 0); |
| break; |
| case OPT_include: |
| case OPT_imacros: |
| { |
| struct pending_option *o = (struct pending_option *) |
| xmalloc (sizeof (struct pending_option)); |
| o->arg = arg; |
| o->next = NULL; |
| |
| if (opt_code == OPT_include) |
| APPEND (pend, include, o); |
| else |
| APPEND (pend, imacros, o); |
| } |
| break; |
| case OPT_iwithprefix: |
| /* Add directory to end of path for includes, |
| with the default prefix at the front of its name. */ |
| /* fall through */ |
| case OPT_iwithprefixbefore: |
| /* Add directory to main path for includes, |
| with the default prefix at the front of its name. */ |
| { |
| char *fname; |
| int len; |
| |
| len = strlen (arg); |
| |
| if (CPP_OPTION (pfile, include_prefix) != 0) |
| { |
| size_t ipl = CPP_OPTION (pfile, include_prefix_len); |
| fname = xmalloc (ipl + len + 1); |
| memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl); |
| memcpy (fname + ipl, arg, len + 1); |
| } |
| else if (cpp_GCC_INCLUDE_DIR_len) |
| { |
| fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1); |
| memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len); |
| memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1); |
| } |
| else |
| fname = xstrdup (arg); |
| |
| append_include_chain (pfile, fname, |
| opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0); |
| } |
| break; |
| case OPT_idirafter: |
| /* Add directory to end of path for includes. */ |
| append_include_chain (pfile, xstrdup (arg), AFTER, 0); |
| break; |
| } |
| } |
| return i + 1; |
| } |
| |
| /* Handle command-line options in (argc, argv). |
| Can be called multiple times, to handle multiple sets of options. |
| Returns if an unrecognized option is seen. |
| Returns number of strings consumed. */ |
| int |
| cpp_handle_options (pfile, argc, argv) |
| cpp_reader *pfile; |
| int argc; |
| char **argv; |
| { |
| int i; |
| int strings_processed; |
| |
| for (i = 0; i < argc; i += strings_processed) |
| { |
| strings_processed = cpp_handle_option (pfile, argc - i, argv + i); |
| if (strings_processed == 0) |
| break; |
| } |
| |
| return i; |
| } |
| |
| static void |
| post_options (pfile) |
| cpp_reader *pfile; |
| { |
| /* -Wtraditional is not useful in C++ mode. */ |
| if (CPP_OPTION (pfile, cplusplus)) |
| CPP_OPTION (pfile, warn_traditional) = 0; |
| |
| /* Permanently disable macro expansion if we are rescanning |
| preprocessed text. Read preprocesed source in ISO mode. */ |
| if (CPP_OPTION (pfile, preprocessed)) |
| { |
| pfile->state.prevent_expansion = 1; |
| CPP_OPTION (pfile, traditional) = 0; |
| } |
| |
| /* Traditional CPP does not accurately track column information. */ |
| if (CPP_OPTION (pfile, traditional)) |
| CPP_OPTION (pfile, show_column) = 0; |
| } |