+++ /dev/null
-/* CPP main program, using CPP Library.
- Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
- Written by Per Bothner, 1994-95.
-
-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.
-
- In other words, you are welcome to use, share and improve this program.
- You are forbidden to forbid anyone else to use, share and improve
- what you give them. Help stamp out software-hoarding! */
-
-#include "config.h"
-#include "system.h"
-#include "cpplib.h"
-#include "intl.h"
-
-/* Encapsulates state used to convert the stream of tokens coming from
- cpp_get_token back into a text file. */
-struct printer
-{
- FILE *outf; /* Stream to write to. */
- const struct line_map *map; /* Logical to physical line mappings. */
- const cpp_token *prev; /* Previous token. */
- const cpp_token *source; /* Source token for spacing. */
- unsigned int line; /* Line currently being written. */
- unsigned char printed; /* Nonzero if something output at line. */
-};
-
-int main PARAMS ((int, char **));
-static void general_init PARAMS ((const char *));
-static void do_preprocessing PARAMS ((int, char **));
-static void setup_callbacks PARAMS ((void));
-
-/* General output routines. */
-static void scan_translation_unit PARAMS ((cpp_reader *));
-static void check_multiline_token PARAMS ((const cpp_string *));
-static int dump_macro PARAMS ((cpp_reader *, cpp_hashnode *, void *));
-
-static void print_line PARAMS ((const struct line_map *, unsigned int,
- const char *));
-static void maybe_print_line PARAMS ((const struct line_map *, unsigned int));
-
-/* Callback routines for the parser. Most of these are active only
- in specific modes. */
-static void cb_line_change PARAMS ((cpp_reader *, const cpp_token *, int));
-static void cb_define PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *));
-static void cb_undef PARAMS ((cpp_reader *, unsigned int, cpp_hashnode *));
-static void cb_include PARAMS ((cpp_reader *, unsigned int,
- const unsigned char *, const cpp_token *));
-static void cb_ident PARAMS ((cpp_reader *, unsigned int,
- const cpp_string *));
-static void cb_file_change PARAMS ((cpp_reader *, const struct line_map *));
-static void cb_def_pragma PARAMS ((cpp_reader *, unsigned int));
-
-const char *progname; /* Needs to be global. */
-static cpp_reader *pfile; /* An opaque handle. */
-static cpp_options *options; /* Options of pfile. */
-static struct printer print;
-
-int
-main (argc, argv)
- int argc;
- char **argv;
-{
- general_init (argv[0]);
-
- /* Construct a reader with default language GNU C89. */
- pfile = cpp_create_reader (CLK_GNUC89);
- options = cpp_get_options (pfile);
-
- do_preprocessing (argc, argv);
-
- if (cpp_destroy (pfile))
- return FATAL_EXIT_CODE;
-
- return SUCCESS_EXIT_CODE;
-}
-
-/* Store the program name, and set the locale. */
-static void
-general_init (argv0)
- const char *argv0;
-{
- progname = argv0 + strlen (argv0);
-
- while (progname != argv0 && ! IS_DIR_SEPARATOR (progname[-1]))
- --progname;
-
- xmalloc_set_program_name (progname);
-
- hex_init ();
- gcc_init_libintl ();
-}
-
-/* Handle switches, preprocess and output. */
-static void
-do_preprocessing (argc, argv)
- int argc;
- char **argv;
-{
- int argi = 1; /* Next argument to handle. */
-
- argi += cpp_handle_options (pfile, argc - argi , argv + argi);
- if (CPP_FATAL_ERRORS (pfile))
- return;
-
- if (argi < argc)
- {
- cpp_fatal (pfile, "invalid option %s", argv[argi]);
- return;
- }
-
- cpp_post_options (pfile);
- if (CPP_FATAL_ERRORS (pfile))
- return;
-
- /* If cpp_handle_options saw --help or --version on the command
- line, it will have set pfile->help_only to indicate this. Exit
- successfully. [The library does not exit itself, because
- e.g. cc1 needs to print its own --help message at this point.] */
- if (options->help_only)
- return;
-
- /* Initialize the printer structure. Setting print.line to -1 here
- is a trick to guarantee that the first token of the file will
- cause a linemarker to be output by maybe_print_line. */
- print.line = (unsigned int) -1;
- print.printed = 0;
- print.prev = 0;
- print.map = 0;
-
- /* Open the output now. We must do so even if no_output is on,
- because there may be other output than from the actual
- preprocessing (e.g. from -dM). */
- if (options->out_fname[0] == '\0')
- print.outf = stdout;
- else
- {
- print.outf = fopen (options->out_fname, "w");
- if (print.outf == NULL)
- {
- cpp_notice_from_errno (pfile, options->out_fname);
- return;
- }
- }
-
- setup_callbacks ();
-
- if (cpp_read_main_file (pfile, options->in_fname, NULL))
- {
- cpp_finish_options (pfile);
-
- /* A successful cpp_read_main_file guarantees that we can call
- cpp_scan_nooutput or cpp_get_token next. */
- if (options->no_output)
- cpp_scan_nooutput (pfile);
- else
- scan_translation_unit (pfile);
-
- /* -dM command line option. Should this be in cpp_finish? */
- if (options->dump_macros == dump_only)
- cpp_forall_identifiers (pfile, dump_macro, NULL);
-
- cpp_finish (pfile);
- }
-
- /* Flush any pending output. */
- if (print.printed)
- putc ('\n', print.outf);
-
- if (ferror (print.outf) || fclose (print.outf))
- cpp_notice_from_errno (pfile, options->out_fname);
-}
-
-/* Set up the callbacks as appropriate. */
-static void
-setup_callbacks ()
-{
- cpp_callbacks *cb = cpp_get_callbacks (pfile);
-
- if (! options->no_output)
- {
- cb->line_change = cb_line_change;
- /* Don't emit #pragma or #ident directives if we are processing
- assembly language; the assembler may choke on them. */
- if (options->lang != CLK_ASM)
- {
- cb->ident = cb_ident;
- cb->def_pragma = cb_def_pragma;
- }
- if (! options->no_line_commands)
- cb->file_change = cb_file_change;
- }
-
- if (options->dump_includes)
- cb->include = cb_include;
-
- if (options->dump_macros == dump_names
- || options->dump_macros == dump_definitions)
- {
- cb->define = cb_define;
- cb->undef = cb_undef;
- }
-}
-
-/* Writes out the preprocessed file, handling spacing and paste
- avoidance issues. */
-static void
-scan_translation_unit (pfile)
- cpp_reader *pfile;
-{
- bool avoid_paste = false;
-
- print.source = NULL;
- for (;;)
- {
- const cpp_token *token = cpp_get_token (pfile);
-
- if (token->type == CPP_PADDING)
- {
- avoid_paste = true;
- if (print.source == NULL
- || (!(print.source->flags & PREV_WHITE)
- && token->val.source == NULL))
- print.source = token->val.source;
- continue;
- }
-
- if (token->type == CPP_EOF)
- break;
-
- /* Subtle logic to output a space if and only if necessary. */
- if (avoid_paste)
- {
- if (print.source == NULL)
- print.source = token;
- if (print.source->flags & PREV_WHITE
- || (print.prev && cpp_avoid_paste (pfile, print.prev, token))
- || (print.prev == NULL && token->type == CPP_HASH))
- putc (' ', print.outf);
- }
- else if (token->flags & PREV_WHITE)
- putc (' ', print.outf);
-
- avoid_paste = false;
- print.source = NULL;
- print.prev = token;
- cpp_output_token (token, print.outf);
-
- if (token->type == CPP_STRING || token->type == CPP_WSTRING
- || token->type == CPP_COMMENT)
- check_multiline_token (&token->val.str);
- }
-}
-
-/* Adjust print.line for newlines embedded in tokens. */
-static void
-check_multiline_token (str)
- const cpp_string *str;
-{
- unsigned int i;
-
- for (i = 0; i < str->len; i++)
- if (str->text[i] == '\n')
- print.line++;
-}
-
-/* If the token read on logical line LINE needs to be output on a
- different line to the current one, output the required newlines or
- a line marker, and return 1. Otherwise return 0. */
-static void
-maybe_print_line (map, line)
- const struct line_map *map;
- unsigned int line;
-{
- /* End the previous line of text. */
- if (print.printed)
- {
- putc ('\n', print.outf);
- print.line++;
- print.printed = 0;
- }
-
- if (line >= print.line && line < print.line + 8)
- {
- while (line > print.line)
- {
- putc ('\n', print.outf);
- print.line++;
- }
- }
- else
- print_line (map, line, "");
-}
-
-/* Output a line marker for logical line LINE. Special flags are "1"
- or "2" indicating entering or leaving a file. */
-static void
-print_line (map, line, special_flags)
- const struct line_map *map;
- unsigned int line;
- const char *special_flags;
-{
- /* End any previous line of text. */
- if (print.printed)
- putc ('\n', print.outf);
- print.printed = 0;
-
- print.line = line;
- if (! options->no_line_commands)
- {
- size_t to_file_len = strlen (map->to_file);
- unsigned char *to_file_quoted = alloca (to_file_len * 4 + 1);
- unsigned char *p;
-
- /* cpp_quote_string does not nul-terminate, so we have to do it
- ourselves. */
- p = cpp_quote_string (to_file_quoted,
- (unsigned char *)map->to_file, to_file_len);
- *p = '\0';
- fprintf (print.outf, "# %u \"%s\"%s",
- SOURCE_LINE (map, print.line), to_file_quoted, special_flags);
-
- if (map->sysp == 2)
- fputs (" 3 4", print.outf);
- else if (map->sysp == 1)
- fputs (" 3", print.outf);
-
- putc ('\n', print.outf);
- }
-}
-
-/* Called when a line of output is started. TOKEN is the first token
- of the line, and at end of file will be CPP_EOF. */
-static void
-cb_line_change (pfile, token, parsing_args)
- cpp_reader *pfile ATTRIBUTE_UNUSED;
- const cpp_token *token;
- int parsing_args;
-{
- if (token->type == CPP_EOF || parsing_args)
- return;
-
- maybe_print_line (print.map, token->line);
- print.printed = 1;
- print.prev = 0;
- print.source = 0;
-
- /* Supply enough spaces to put this token in its original column,
- one space per column greater than 2, since scan_translation_unit
- will provide a space if PREV_WHITE. Don't bother trying to
- reconstruct tabs; we can't get it right in general, and nothing
- ought to care. Some things do care; the fault lies with them. */
- if (token->col > 2)
- {
- unsigned int spaces = token->col - 2;
-
- while (spaces--)
- putc (' ', print.outf);
- }
-}
-
-static void
-cb_ident (pfile, line, str)
- cpp_reader *pfile ATTRIBUTE_UNUSED;
- unsigned int line;
- const cpp_string * str;
-{
- maybe_print_line (print.map, line);
- fprintf (print.outf, "#ident \"%s\"\n", str->text);
- print.line++;
-}
-
-static void
-cb_define (pfile, line, node)
- cpp_reader *pfile;
- unsigned int line;
- cpp_hashnode *node;
-{
- maybe_print_line (print.map, line);
- fputs ("#define ", print.outf);
-
- /* -dD command line option. */
- if (options->dump_macros == dump_definitions)
- fputs ((const char *) cpp_macro_definition (pfile, node), print.outf);
- else
- fputs ((const char *) NODE_NAME (node), print.outf);
-
- putc ('\n', print.outf);
- print.line++;
-}
-
-static void
-cb_undef (pfile, line, node)
- cpp_reader *pfile ATTRIBUTE_UNUSED;
- unsigned int line;
- cpp_hashnode *node;
-{
- maybe_print_line (print.map, line);
- fprintf (print.outf, "#undef %s\n", NODE_NAME (node));
- print.line++;
-}
-
-static void
-cb_include (pfile, line, dir, header)
- cpp_reader *pfile;
- unsigned int line;
- const unsigned char *dir;
- const cpp_token *header;
-{
- maybe_print_line (print.map, line);
- fprintf (print.outf, "#%s %s\n", dir, cpp_token_as_text (pfile, header));
- print.line++;
-}
-
-/* The file name, line number or system header flags have changed, as
- described in MAP. From this point on, the old print.map might be
- pointing to freed memory, and so must not be dereferenced. */
-
-static void
-cb_file_change (pfile, map)
- cpp_reader *pfile ATTRIBUTE_UNUSED;
- const struct line_map *map;
-{
- const char *flags = "";
-
- /* First time? */
- if (print.map == NULL)
- {
- /* Avoid printing foo.i when the main file is foo.c. */
- if (!options->preprocessed)
- print_line (map, map->from_line, flags);
- }
- else
- {
- /* Bring current file to correct line when entering a new file. */
- if (map->reason == LC_ENTER)
- maybe_print_line (map - 1, map->from_line - 1);
-
- if (map->reason == LC_ENTER)
- flags = " 1";
- else if (map->reason == LC_LEAVE)
- flags = " 2";
- print_line (map, map->from_line, flags);
- }
-
- print.map = map;
-}
-
-/* Copy a #pragma directive to the preprocessed output. */
-static void
-cb_def_pragma (pfile, line)
- cpp_reader *pfile;
- unsigned int line;
-{
- maybe_print_line (print.map, line);
- fputs ("#pragma ", print.outf);
- cpp_output_line (pfile, print.outf);
- print.line++;
-}
-
-/* Dump out the hash table. */
-static int
-dump_macro (pfile, node, v)
- cpp_reader *pfile;
- cpp_hashnode *node;
- void *v ATTRIBUTE_UNUSED;
-{
- if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN))
- {
- fputs ("#define ", print.outf);
- fputs ((const char *) cpp_macro_definition (pfile, node), print.outf);
- putc ('\n', print.outf);
- print.line++;
- }
-
- return 1;
-}
projects / msp430-gcc.git / blobdiff