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/* Install modified versions of certain ANSI-incompatible system header
files which are fixed to work correctly with ANSI C and placed in a
directory that GNU C will search.
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC 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.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "fixlib.h"
/* * * * * * * * * * * * *
load_file_data loads all the contents of a file into malloc-ed memory.
Its argument is the file pointer of the file to read in; the returned
result is the NUL terminated contents of the file. The file
is presumed to be an ASCII text file containing no NULs. */
char *
load_file_data (fp)
FILE* fp;
{
char *pz_data = (char*)NULL;
int space_left = -1; /* allow for terminating NUL */
size_t space_used = 0;
do
{
size_t size_read;
if (space_left < 1024)
{
space_left += 4096;
if (pz_data)
pz_data = realloc ((void*)pz_data, space_left + space_used + 1 );
else
pz_data = malloc (space_left + space_used + 1 );
}
size_read = fread (pz_data + space_used, 1, space_left, fp);
if (size_read == 0)
{
if (feof (fp))
break;
if (ferror (fp))
{
int err = errno;
if (err != EISDIR)
fprintf (stderr, "error %d (%s) reading input\n", err,
strerror (err));
free ((void *) pz_data);
fclose (fp);
return (char *) NULL;
}
}
space_left -= size_read;
space_used += size_read;
} while (! feof (fp));
pz_data = realloc ((void*)pz_data, space_used+1 );
pz_data[ space_used ] = NUL;
fclose (fp);
return pz_data;
}
t_bool
is_cxx_header (fname, text)
tCC *fname;
tCC *text;
{
/* First, check to see if the file is in a C++ directory */
for (;;)
{
switch (*(fname++))
{
case 'C': /* check for "CC/" */
if ((fname[0] == 'C') && (fname[1] == '/'))
return BOOL_TRUE;
break;
case 'x': /* check for "xx/" */
if ((fname[0] == 'x') && (fname[1] == '/'))
return BOOL_TRUE;
break;
case '+': /* check for "++" */
if (fname[0] == '+')
return BOOL_TRUE;
break;
case NUL:
goto not_cxx_name;
}
} not_cxx_name:;
/* Or it might contain the phrase 'extern "C++"' */
for (;;)
{
tSCC zExtern[] = "extern";
tSCC zExtCxx[] = "\"C++\"";
tSCC zTemplate[] = "template";
switch (*(text++))
{
case 'e':
/* Check for "extern \"C++\"" */
if (strncmp (text, zExtern+1, sizeof( zExtern )-2) != 0)
break;
text += sizeof( zExtern )-2;
if (! isspace( *(text++)) )
break;
while (isspace( *text )) text++;
if (strncmp (text, zExtCxx, sizeof (zExtCxx) -1) == 0)
return BOOL_TRUE;
break;
case 't':
/* Check for "template<" */
if (strncmp (text, zTemplate+1, sizeof( zTemplate )-2) != 0)
break;
text += sizeof( zTemplate )-2;
while (isspace( *text )) text++;
if (*text == '<')
return BOOL_TRUE;
break;
case NUL:
goto text_done;
break;
}
} text_done:;
return BOOL_FALSE;
}
/* * * * * * * * * * * * *
Compile one regular expression pattern for later use. PAT contains
the pattern, RE points to a regex_t structure (which should have
been bzeroed). MATCH is 1 if we need to know where the regex
matched, 0 if not. If regcomp fails, prints an error message and
aborts; E1 and E2 are strings to shove into the error message.
The patterns we search for are all egrep patterns.
REG_EXTENDED|REG_NEWLINE produces identical regex syntax/semantics
to egrep (verified from 4.4BSD Programmer's Reference Manual). */
void
compile_re( pat, re, match, e1, e2 )
tCC *pat;
regex_t *re;
int match;
tCC *e1;
tCC *e2;
{
tSCC z_bad_comp[] = "fixincl ERROR: cannot compile %s regex for %s\n\
\texpr = `%s'\n\terror %s\n";
int flags, err;
flags = (match ? REG_EXTENDED|REG_NEWLINE
: REG_EXTENDED|REG_NEWLINE|REG_NOSUB);
err = regcomp (re, pat, flags);
if (err)
{
char rerrbuf[1024];
regerror (err, re, rerrbuf, 1024);
fprintf (stderr, z_bad_comp, e1, e2, pat, rerrbuf);
exit (EXIT_FAILURE);
}
}
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