-/* CPP main program, using CPP Library.
- Copyright (C) 1995, 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Preprocess only, using cpplib.
+ 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
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding! */
-#ifndef EMACS
#include "config.h"
#include "system.h"
-#else
-#include <stdio.h>
+#include "cpplib.h"
+#include "cpphash.h"
-extern char *getenv ();
-#endif /* not EMACS */
+static void setup_callbacks PARAMS ((cpp_reader *));
-#include "cpplib.h"
-#include "intl.h"
+/* General output routines. */
+static void scan_translation_unit PARAMS ((cpp_reader *));
+static void scan_translation_unit_trad PARAMS ((cpp_reader *));
+static void account_for_newlines PARAMS ((cpp_reader *, const uchar *,
+ size_t));
+static int dump_macro PARAMS ((cpp_reader *, cpp_hashnode *, void *));
+
+static void print_line PARAMS ((cpp_reader *, const struct line_map *,
+ unsigned int, const char *));
+static void maybe_print_line PARAMS ((cpp_reader *, 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));
+
+/* Preprocess and output. */
+void
+cpp_preprocess_file (pfile, in_fname, out_stream)
+ cpp_reader *pfile;
+ const char *in_fname;
+ FILE *out_stream;
+{
+ /* 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. */
+ pfile->print.line = (unsigned int) -1;
+ pfile->print.printed = 0;
+ pfile->print.prev = 0;
+ pfile->print.map = 0;
+ pfile->print.outf = out_stream;
+
+ setup_callbacks (pfile);
+
+ if (cpp_read_main_file (pfile, in_fname, NULL))
+ {
+ cpp_options *options = &pfile->opts;
+ 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 if (options->traditional)
+ scan_translation_unit_trad (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);
+ }
+
+ /* Flush any pending output. */
+ if (pfile->print.printed)
+ putc ('\n', pfile->print.outf);
+}
+
+/* Set up the callbacks as appropriate. */
+static void
+setup_callbacks (pfile)
+ cpp_reader *pfile;
+{
+ cpp_options *options = &pfile->opts;
+ 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;
-const char *progname;
+ pfile->print.source = NULL;
+ for (;;)
+ {
+ const cpp_token *token = cpp_get_token (pfile);
+
+ if (token->type == CPP_PADDING)
+ {
+ avoid_paste = true;
+ if (pfile->print.source == NULL
+ || (!(pfile->print.source->flags & PREV_WHITE)
+ && token->val.source == NULL))
+ pfile->print.source = token->val.source;
+ continue;
+ }
-cpp_reader parse_in;
-cpp_options options;
+ if (token->type == CPP_EOF)
+ break;
-\f
-extern int main PARAMS ((int, char **));
-int
-main (argc, argv)
- int argc;
- char **argv;
+ /* Subtle logic to output a space if and only if necessary. */
+ if (avoid_paste)
+ {
+ if (pfile->print.source == NULL)
+ pfile->print.source = token;
+ if (pfile->print.source->flags & PREV_WHITE
+ || (pfile->print.prev
+ && cpp_avoid_paste (pfile, pfile->print.prev, token))
+ || (pfile->print.prev == NULL && token->type == CPP_HASH))
+ putc (' ', pfile->print.outf);
+ }
+ else if (token->flags & PREV_WHITE)
+ putc (' ', pfile->print.outf);
+
+ avoid_paste = false;
+ pfile->print.source = NULL;
+ pfile->print.prev = token;
+ cpp_output_token (token, pfile->print.outf);
+
+ if (token->type == CPP_COMMENT)
+ account_for_newlines (pfile, token->val.str.text, token->val.str.len);
+ }
+}
+
+/* Adjust pfile->print.line for newlines embedded in output. */
+static void
+account_for_newlines (pfile, str, len)
+ cpp_reader *pfile;
+ const uchar *str;
+ size_t len;
+{
+ while (len--)
+ if (*str++ == '\n')
+ pfile->print.line++;
+}
+
+/* Writes out a traditionally preprocessed file. */
+static void
+scan_translation_unit_trad (pfile)
+ cpp_reader *pfile;
+{
+ while (_cpp_read_logical_line_trad (pfile))
+ {
+ size_t len = pfile->out.cur - pfile->out.base;
+ maybe_print_line (pfile, pfile->print.map, pfile->out.first_line);
+ fwrite (pfile->out.base, 1, len, pfile->print.outf);
+ pfile->print.printed = 1;
+ if (!CPP_OPTION (pfile, discard_comments))
+ account_for_newlines (pfile, pfile->out.base, len);
+ }
+}
+
+/* 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 (pfile, map, line)
+ cpp_reader *pfile;
+ const struct line_map *map;
+ unsigned int line;
{
- char *p;
- int argi = 1; /* Next argument to handle. */
- struct cpp_options *opts = &options;
- enum cpp_token kind;
-
- p = argv[0] + strlen (argv[0]);
- while (p != argv[0] && p[-1] != '/') --p;
- progname = p;
-
-#ifdef HAVE_LC_MESSAGES
- setlocale (LC_MESSAGES, "");
-#endif
- (void) bindtextdomain (PACKAGE, localedir);
- (void) textdomain (PACKAGE);
-
- cpp_reader_init (&parse_in);
- parse_in.opts = opts;
-
- cpp_options_init (opts);
-
- argi += cpp_handle_options (&parse_in, argc - argi , argv + argi);
- if (argi < argc && ! CPP_FATAL_ERRORS (&parse_in))
- cpp_fatal (&parse_in, "Invalid option `%s'", argv[argi]);
- if (CPP_FATAL_ERRORS (&parse_in))
- return (FATAL_EXIT_CODE);
-
- parse_in.show_column = 1;
-
- if (! cpp_start_read (&parse_in, opts->in_fname))
- return (FATAL_EXIT_CODE);
-
- /* Now that we know the input file is valid, open the output. */
-
- if (!opts->out_fname || !strcmp (opts->out_fname, ""))
- opts->out_fname = "stdout";
- else if (! freopen (opts->out_fname, "w", stdout))
- cpp_pfatal_with_name (&parse_in, opts->out_fname);
-
- if (! opts->no_output)
+ /* End the previous line of text. */
+ if (pfile->print.printed)
+ {
+ putc ('\n', pfile->print.outf);
+ pfile->print.line++;
+ pfile->print.printed = 0;
+ }
+
+ if (line >= pfile->print.line && line < pfile->print.line + 8)
{
- do
+ while (line > pfile->print.line)
{
- kind = cpp_get_token (&parse_in);
- if (CPP_WRITTEN (&parse_in) >= BUFSIZ || kind == CPP_EOF)
- {
- size_t rem, count = CPP_WRITTEN (&parse_in);
-
- rem = fwrite (parse_in.token_buffer, 1, count, stdout);
- if (rem < count)
- /* Write error. */
- cpp_pfatal_with_name (&parse_in, opts->out_fname);
-
- CPP_SET_WRITTEN (&parse_in, 0);
- }
+ putc ('\n', pfile->print.outf);
+ pfile->print.line++;
}
- while (kind != CPP_EOF);
}
else
+ print_line (pfile, 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 (pfile, map, line, special_flags)
+ cpp_reader *pfile;
+ const struct line_map *map;
+ unsigned int line;
+ const char *special_flags;
+{
+ /* End any previous line of text. */
+ if (pfile->print.printed)
+ putc ('\n', pfile->print.outf);
+ pfile->print.printed = 0;
+
+ pfile->print.line = line;
+ if (! CPP_OPTION (pfile, no_line_commands))
{
- do
+ 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 (pfile->print.outf, "# %u \"%s\"%s",
+ SOURCE_LINE (map, pfile->print.line),
+ to_file_quoted, special_flags);
+
+ if (map->sysp == 2)
+ fputs (" 3 4", pfile->print.outf);
+ else if (map->sysp == 1)
+ fputs (" 3", pfile->print.outf);
+
+ putc ('\n', pfile->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;
+ const cpp_token *token;
+ int parsing_args;
+{
+ if (token->type == CPP_EOF || parsing_args)
+ return;
+
+ maybe_print_line (pfile, pfile->print.map, token->line);
+ pfile->print.prev = 0;
+ pfile->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 (!CPP_OPTION (pfile, traditional))
+ {
+ pfile->print.printed = 1;
+ if (token->col > 2)
{
- cpp_scan_buffer (&parse_in);
- kind = cpp_get_token (&parse_in);
+ unsigned int spaces = token->col - 2;
+
+ while (spaces--)
+ putc (' ', pfile->print.outf);
}
- while (kind != CPP_EOF);
- CPP_SET_WRITTEN (&parse_in, 0);
}
+}
+
+static void
+cb_ident (pfile, line, str)
+ cpp_reader *pfile;
+ unsigned int line;
+ const cpp_string * str;
+{
+ maybe_print_line (pfile, pfile->print.map, line);
+ fprintf (pfile->print.outf, "#ident \"%s\"\n", str->text);
+ pfile->print.line++;
+}
+
+static void
+cb_define (pfile, line, node)
+ cpp_reader *pfile;
+ unsigned int line;
+ cpp_hashnode *node;
+{
+ maybe_print_line (pfile, pfile->print.map, line);
+ fputs ("#define ", pfile->print.outf);
+
+ /* -dD command line option. */
+ if (CPP_OPTION (pfile, dump_macros) == dump_definitions)
+ fputs ((const char *) cpp_macro_definition (pfile, node),
+ pfile->print.outf);
+ else
+ fputs ((const char *) NODE_NAME (node), pfile->print.outf);
+
+ putc ('\n', pfile->print.outf);
+ pfile->print.line++;
+}
- cpp_finish (&parse_in);
- if (fwrite (parse_in.token_buffer, 1, CPP_WRITTEN (&parse_in), stdout)
- < CPP_WRITTEN (&parse_in))
- cpp_pfatal_with_name (&parse_in, opts->out_fname);
+static void
+cb_undef (pfile, line, node)
+ cpp_reader *pfile;
+ unsigned int line;
+ cpp_hashnode *node;
+{
+ maybe_print_line (pfile, pfile->print.map, line);
+ fprintf (pfile->print.outf, "#undef %s\n", NODE_NAME (node));
+ pfile->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 (pfile, pfile->print.map, line);
+ fprintf (pfile->print.outf, "#%s %s\n", dir,
+ cpp_token_as_text (pfile, header));
+ pfile->print.line++;
+}
+
+/* The file name, line number or system header flags have changed, as
+ described in MAP. From this point on, the old pfile->print.map might be
+ pointing to freed memory, and so must not be dereferenced. */
+
+static void
+cb_file_change (pfile, map)
+ cpp_reader *pfile;
+ const struct line_map *map;
+{
+ const char *flags = "";
+
+ /* First time? */
+ if (pfile->print.map == NULL)
+ {
+ /* Avoid printing foo.i when the main file is foo.c. */
+ if (!CPP_OPTION (pfile, preprocessed))
+ print_line (pfile, 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 (pfile, map - 1, map->from_line - 1);
+
+ if (map->reason == LC_ENTER)
+ flags = " 1";
+ else if (map->reason == LC_LEAVE)
+ flags = " 2";
+ print_line (pfile, map, map->from_line, flags);
+ }
+
+ pfile->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 (pfile, pfile->print.map, line);
+ fputs ("#pragma ", pfile->print.outf);
+ cpp_output_line (pfile, pfile->print.outf);
+ pfile->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 ", pfile->print.outf);
+ fputs ((const char *) cpp_macro_definition (pfile, node),
+ pfile->print.outf);
+ putc ('\n', pfile->print.outf);
+ pfile->print.line++;
+ }
- if (parse_in.errors)
- return (FATAL_EXIT_CODE);
- return (SUCCESS_EXIT_CODE);
+ return 1;
}
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