282 lines
6.8 KiB
C
282 lines
6.8 KiB
C
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/* Install modified versions of certain ANSI-incompatible system header
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files which are fixed to work correctly with ANSI C and placed in a
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directory that GCC will search.
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Copyright (C) 1999, 2000, 2001, 2004 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "fixlib.h"
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/* * * * * * * * * * * * *
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load_file_data loads all the contents of a file into malloc-ed memory.
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Its argument is the file pointer of the file to read in; the returned
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result is the NUL terminated contents of the file. The file
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is presumed to be an ASCII text file containing no NULs. */
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char *
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load_file_data (FILE* fp)
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{
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char *pz_data = (char*)NULL;
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int space_left = -1; /* allow for terminating NUL */
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size_t space_used = 0;
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if (fp == (FILE*)NULL)
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return pz_data;
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do
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{
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size_t size_read;
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if (space_left < 1024)
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{
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space_left += 4096;
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pz_data = XRESIZEVEC (char, pz_data, space_left + space_used + 1 );
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}
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size_read = fread (pz_data + space_used, 1, space_left, fp);
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if (size_read == 0)
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{
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if (feof (fp))
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break;
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if (ferror (fp))
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{
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int err = errno;
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if (err != EISDIR)
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fprintf (stderr, "error %d (%s) reading input\n", err,
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xstrerror (err));
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free ((void *) pz_data);
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return (char *) NULL;
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}
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}
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space_left -= size_read;
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space_used += size_read;
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} while (! feof (fp));
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pz_data = XRESIZEVEC (char, pz_data, space_used+1 );
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pz_data[ space_used ] = NUL;
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return pz_data;
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}
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#ifdef IS_CXX_HEADER_NEEDED
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t_bool
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is_cxx_header (tCC* fname, tCC* text)
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{
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/* First, check to see if the file is in a C++ directory */
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for (;;)
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{
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switch (*(fname++))
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{
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case 'C': /* check for "CC/" */
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if ((fname[0] == 'C') && (fname[1] == '/'))
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return BOOL_TRUE;
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break;
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case 'x': /* check for "xx/" */
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if ((fname[0] == 'x') && (fname[1] == '/'))
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return BOOL_TRUE;
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break;
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case '+': /* check for "++" */
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if (fname[0] == '+')
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return BOOL_TRUE;
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break;
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case NUL:
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goto not_cxx_name;
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}
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} not_cxx_name:;
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/* Or it might contain one of several phrases which indicate C++ code.
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Currently recognized are:
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extern "C++"
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-*- (Mode: )? C++ -*- (emacs mode marker)
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template <
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*/
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{
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tSCC cxxpat[] = "\
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extern[ \t]*\"C\\+\\+\"|\
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-\\*-[ \t]*([mM]ode:[ \t]*)?[cC]\\+\\+[; \t]*-\\*-|\
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template[ \t]*<|\
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^[ \t]*class[ \t]|\
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(public|private|protected):|\
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^[ \t]*#[ \t]*pragma[ \t]+(interface|implementation)\
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";
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static regex_t cxxre;
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static int compiled;
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if (!compiled)
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compile_re (cxxpat, &cxxre, 0, "contents check", "is_cxx_header");
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if (xregexec (&cxxre, text, 0, 0, 0) == 0)
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return BOOL_TRUE;
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}
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return BOOL_FALSE;
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}
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#endif /* CXX_TYPE_NEEDED */
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#ifdef SKIP_QUOTE_NEEDED
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/*
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* Skip over a quoted string. Single quote strings may
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* contain multiple characters if the first character is
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* a backslash. Especially a backslash followed by octal digits.
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* We are not doing a correctness syntax check here.
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*/
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tCC*
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skip_quote(char q, char* text )
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{
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for (;;)
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{
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char ch = *(text++);
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switch (ch)
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{
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case '\\':
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text++; /* skip over whatever character follows */
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break;
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case '"':
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case '\'':
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if (ch != q)
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break;
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/*FALLTHROUGH*/
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case '\n':
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case NUL:
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goto skip_done;
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}
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} skip_done:;
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return text;
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}
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#endif /* SKIP_QUOTE_NEEDED */
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/* * * * * * * * * * * * *
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Compile one regular expression pattern for later use. PAT contains
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the pattern, RE points to a regex_t structure (which should have
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been bzeroed). MATCH is 1 if we need to know where the regex
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matched, 0 if not. If xregcomp fails, prints an error message and
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aborts; E1 and E2 are strings to shove into the error message.
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The patterns we search for are all egrep patterns.
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REG_EXTENDED|REG_NEWLINE produces identical regex syntax/semantics
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to egrep (verified from 4.4BSD Programmer's Reference Manual). */
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void
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compile_re( tCC* pat, regex_t* re, int match, tCC* e1, tCC* e2 )
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{
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tSCC z_bad_comp[] = "fixincl ERROR: cannot compile %s regex for %s\n\
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\texpr = `%s'\n\terror %s\n";
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int flags, err;
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flags = (match ? REG_EXTENDED|REG_NEWLINE
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: REG_EXTENDED|REG_NEWLINE|REG_NOSUB);
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err = xregcomp (re, pat, flags);
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if (err)
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{
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char rerrbuf[1024];
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regerror (err, re, rerrbuf, 1024);
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fprintf (stderr, z_bad_comp, e1, e2, pat, rerrbuf);
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exit (EXIT_FAILURE);
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}
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}
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/* * * * * * * * * * * * *
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Helper routine and data for the machine_name test and fix. */
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tSCC mn_label_pat[] = "^[ \t]*#[ \t]*(if|ifdef|ifndef)[ \t]+";
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static regex_t mn_label_re;
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static regex_t mn_name_re;
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static int mn_compiled = 0;
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t_bool
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mn_get_regexps(regex_t** label_re, regex_t** name_re, tCC* who )
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{
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if (! pz_mn_name_pat)
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return BOOL_FALSE;
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if (! mn_compiled)
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{
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compile_re (mn_label_pat, &mn_label_re, 1, "label pattern", who);
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compile_re (pz_mn_name_pat, &mn_name_re, 1, "name pattern", who);
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mn_compiled++;
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}
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*label_re = &mn_label_re;
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*name_re = &mn_name_re;
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return BOOL_TRUE;
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}
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#ifdef SEPARATE_FIX_PROC
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char*
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make_raw_shell_str( char* pz_d, tCC* pz_s, size_t smax )
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{
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tSCC zQ[] = "'\\''";
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size_t dtaSize;
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char* pz_d_start = pz_d;
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smax--; /* adjust for trailing NUL */
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dtaSize = strlen( pz_s ) + 3;
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{
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const char* pz = pz_s - 1;
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for (;;) {
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pz = strchr( pz+1, '\'' );
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if (pz == (char*)NULL)
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break;
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dtaSize += sizeof( zQ )-1;
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}
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}
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if (dtaSize > smax)
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return (char*)NULL;
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*(pz_d++) = '\'';
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for (;;) {
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if ((size_t) (pz_d - pz_d_start) >= smax)
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return (char*)NULL;
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switch (*(pz_d++) = *(pz_s++)) {
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case NUL:
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goto loopDone;
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case '\'':
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if ((size_t) (pz_d - pz_d_start) >= smax - sizeof( zQ )-1)
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return (char*)NULL;
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strcpy( pz_d-1, zQ );
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pz_d += sizeof( zQ )-2;
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}
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} loopDone:;
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pz_d[-1] = '\'';
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*pz_d = NUL;
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return pz_d;
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}
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#endif
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