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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [fixincludes/] [fixfixes.c] - Rev 438
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/* Test to see if a particular fix should be applied to a header file. Copyright (C) 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2009 Free Software Foundation, Inc. = = = = = = = = = = = = = = = = = = = = = = = = = NOTE TO DEVELOPERS The routines you write here must work closely with fixincl.c. Here are the rules: 1. Every test procedure name must be suffixed with "_fix". These routines will be referenced from inclhack.def, sans the suffix. 2. Use the "FIX_PROC_HEAD()" macro _with_ the "_fix" suffix (I cannot use the ## magic from ANSI C) for defining your entry point. 3. Put your test name into the FIXUP_TABLE. 4. Do not read anything from stdin. It is closed. 5. Write to stderr only in the event of a reportable error In such an event, call "exit (EXIT_FAILURE)". 6. You have access to the fixDescList entry for the fix in question. This may be useful, for example, if there are interesting strings or pre-compiled regular expressions stored there. = = = = = = = = = = = = = = = = = = = = = = = = = This file is part of GCC. GCC 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 3, or (at your option) any later version. GCC 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 GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #include "fixlib.h" #define GTYPE_SE_CT 1 #ifdef SEPARATE_FIX_PROC #include "fixincl.x" #endif tSCC zNeedsArg[] = "fixincl error: `%s' needs %s argument (c_fix_arg[%d])\n"; typedef void t_fix_proc (const char *, const char *, tFixDesc *) ; typedef struct { const char* fix_name; t_fix_proc* fix_proc; } fix_entry_t; #define FIXUP_TABLE \ _FT_( "char_macro_def", char_macro_def_fix ) \ _FT_( "char_macro_use", char_macro_use_fix ) \ _FT_( "format", format_fix ) \ _FT_( "machine_name", machine_name_fix ) \ _FT_( "wrap", wrap_fix ) \ _FT_( "gnu_type", gnu_type_fix ) #define FIX_PROC_HEAD( fix ) \ static void fix (const char* filname ATTRIBUTE_UNUSED , \ const char* text ATTRIBUTE_UNUSED , \ tFixDesc* p_fixd ATTRIBUTE_UNUSED ) #ifdef NEED_PRINT_QUOTE /* * Skip over a quoted string. Single quote strings may * contain multiple characters if the first character is * a backslash. Especially a backslash followed by octal digits. * We are not doing a correctness syntax check here. */ static char* print_quote(char q, char* text ) { fputc( q, stdout ); for (;;) { char ch = *(text++); fputc( ch, stdout ); switch (ch) { case '\\': if (*text == NUL) goto quote_done; fputc( *(text++), stdout ); break; case '"': case '\'': if (ch != q) break; /*FALLTHROUGH*/ case '\n': case NUL: goto quote_done; } } quote_done:; return text; } #endif /* NEED_PRINT_QUOTE */ /* * Emit the GNU standard type wrapped up in such a way that * this thing can be encountered countless times during a compile * and not cause even a warning. */ static const char* emit_gnu_type (const char* text, regmatch_t* rm ) { char z_TYPE[ 64 ]; char z_type[ 64 ]; fwrite (text, rm[0].rm_so, 1, stdout); { const char* ps = text + rm[1].rm_so; const char* pe = text + rm[1].rm_eo; char* pd = z_type; char* pD = z_TYPE; while (ps < pe) *(pD++) = TOUPPER( *(pd++) = *(ps++) ); *pD = *pd = NUL; } /* * Now print out the reformed typedef, * with a C++ guard for WCHAR */ { tSCC z_fmt[] = "\ #if !defined(_GCC_%s_T)%s\n\ #define _GCC_%s_T\n\ typedef __%s_TYPE__ %s_t;\n\ #endif\n"; const char *const pz_guard = (strcmp (z_type, "wchar") == 0) ? " && ! defined(__cplusplus)" : ""; printf (z_fmt, z_TYPE, pz_guard, z_TYPE, z_TYPE, z_type); } return text += rm[0].rm_eo; } /* * Copy the `format' string to std out, replacing `%n' expressions * with the matched text from a regular expression evaluation. * Doubled '%' characters will be replaced with a single copy. * '%' characters in other contexts and all other characters are * copied out verbatim. */ static void format_write (tCC* format, tCC* text, regmatch_t av[] ) { int c; while ((c = (unsigned)*(format++)) != NUL) { if (c != '%') { putchar(c); continue; } c = (unsigned)*(format++); /* * IF the character following a '%' is not a digit, * THEN we will always emit a '%' and we may or may * not emit the following character. We will end on * a NUL and we will emit only one of a pair of '%'. */ if (! ISDIGIT ( c )) { putchar( '%' ); switch (c) { case NUL: return; case '%': break; default: putchar(c); } } /* * Emit the matched subexpression numbered 'c'. * IF, of course, there was such a match... */ else { regmatch_t* pRM = av + (c - (unsigned)'0'); size_t len; if (pRM->rm_so < 0) continue; len = pRM->rm_eo - pRM->rm_so; if (len > 0) fwrite(text + pRM->rm_so, len, 1, stdout); } } } /* * Search for multiple copies of a regular expression. Each block * of matched text is replaced with the format string, as described * above in `format_write'. */ FIX_PROC_HEAD( format_fix ) { tCC* pz_pat = p_fixd->patch_args[2]; tCC* pz_fmt = p_fixd->patch_args[1]; regex_t re; regmatch_t rm[10]; IGNORE_ARG(filname); /* * We must have a format */ if (pz_fmt == (tCC*)NULL) { fprintf( stderr, zNeedsArg, p_fixd->fix_name, "replacement format", 0 ); exit (EXIT_BROKEN); } /* * IF we don't have a search text, then go find the first * regular expression among the tests. */ if (pz_pat == (tCC*)NULL) { tTestDesc* pTD = p_fixd->p_test_desc; int ct = p_fixd->test_ct; for (;;) { if (ct-- <= 0) { fprintf( stderr, zNeedsArg, p_fixd->fix_name, "search text", 1 ); exit (EXIT_BROKEN); } if (pTD->type == TT_EGREP) { pz_pat = pTD->pz_test_text; break; } pTD++; } } /* * Replace every copy of the text we find */ compile_re (pz_pat, &re, 1, "format search-text", "format_fix" ); while (xregexec (&re, text, 10, rm, 0) == 0) { fwrite( text, rm[0].rm_so, 1, stdout ); format_write( pz_fmt, text, rm ); text += rm[0].rm_eo; } /* * Dump out the rest of the file */ fputs (text, stdout); } /* Scan the input file for all occurrences of text like this: #define TIOCCONS _IO(T, 12) and change them to read like this: #define TIOCCONS _IO('T', 12) which is the required syntax per the C standard. (The definition of _IO also has to be tweaked - see below.) 'IO' is actually whatever you provide as the `c_fix_arg' argument. */ FIX_PROC_HEAD( char_macro_use_fix ) { /* This regexp looks for a traditional-syntax #define (# in column 1) of an object-like macro. */ static const char pat[] = "^#[ \t]*define[ \t]+[_A-Za-z][_A-Za-z0-9]*[ \t]+"; static regex_t re; const char* str = p_fixd->patch_args[1]; regmatch_t rm[1]; const char *p, *limit; size_t len; IGNORE_ARG(filname); if (str == NULL) { fprintf (stderr, zNeedsArg, p_fixd->fix_name, "ioctl type", 0); exit (EXIT_BROKEN); } len = strlen (str); compile_re (pat, &re, 1, "macro pattern", "char_macro_use_fix"); for (p = text; xregexec (&re, p, 1, rm, 0) == 0; p = limit + 1) { /* p + rm[0].rm_eo is the first character of the macro replacement. Find the end of the macro replacement, and the STR we were sent to look for within the replacement. */ p += rm[0].rm_eo; limit = p - 1; do { limit = strchr (limit + 1, '\n'); if (!limit) goto done; } while (limit[-1] == '\\'); do { if (*p == str[0] && !strncmp (p+1, str+1, len-1)) goto found; } while (++p < limit - len); /* Hit end of line. */ continue; found: /* Found STR on this line. If the macro needs fixing, the next few chars will be whitespace or uppercase, then an open paren, then a single letter. */ while ((ISSPACE (*p) || ISUPPER (*p)) && p < limit) p++; if (*p++ != '(') continue; if (!ISALPHA (*p)) continue; if (ISIDNUM (p[1])) continue; /* Splat all preceding text into the output buffer, quote the character at p, then proceed. */ fwrite (text, 1, p - text, stdout); putchar ('\''); putchar (*p); putchar ('\''); text = p + 1; } done: fputs (text, stdout); } /* Scan the input file for all occurrences of text like this: #define xxxIOxx(x, y) (....'x'<<16....) and change them to read like this: #define xxxIOxx(x, y) (....x<<16....) which is the required syntax per the C standard. (The uses of _IO also has to be tweaked - see above.) 'IO' is actually whatever you provide as the `c_fix_arg' argument. */ FIX_PROC_HEAD( char_macro_def_fix ) { /* This regexp looks for any traditional-syntax #define (# in column 1). */ static const char pat[] = "^#[ \t]*define[ \t]+"; static regex_t re; const char* str = p_fixd->patch_args[1]; regmatch_t rm[1]; const char *p, *limit; char arg; size_t len; IGNORE_ARG(filname); if (str == NULL) { fprintf (stderr, zNeedsArg, p_fixd->fix_name, "ioctl type", 0); exit (EXIT_BROKEN); } len = strlen (str); compile_re (pat, &re, 1, "macro pattern", "fix_char_macro_defines"); for (p = text; xregexec (&re, p, 1, rm, 0) == 0; p = limit + 1) { /* p + rm[0].rm_eo is the first character of the macro name. Find the end of the macro replacement, and the STR we were sent to look for within the name. */ p += rm[0].rm_eo; limit = p - 1; do { limit = strchr (limit + 1, '\n'); if (!limit) goto done; } while (limit[-1] == '\\'); do { if (*p == str[0] && !strncmp (p+1, str+1, len-1)) goto found; p++; } while (ISIDNUM (*p)); /* Hit end of macro name without finding the string. */ continue; found: /* Found STR in this macro name. If the macro needs fixing, there may be a few uppercase letters, then there will be an open paren with _no_ intervening whitespace, and then a single letter. */ while (ISUPPER (*p) && p < limit) p++; if (*p++ != '(') continue; if (!ISALPHA (*p)) continue; if (ISIDNUM (p[1])) continue; /* The character at P is the one to look for in the following text. */ arg = *p; p += 2; while (p < limit) { if (p[-1] == '\'' && p[0] == arg && p[1] == '\'') { /* Remove the quotes from this use of ARG. */ p--; fwrite (text, 1, p - text, stdout); putchar (arg); p += 3; text = p; } else p++; } } done: fputs (text, stdout); } /* Fix for machine name #ifdefs that are not in the namespace reserved by the C standard. They won't be defined if compiling with -ansi, and the headers will break. We go to some trouble to only change #ifdefs where the macro is defined by GCC in non-ansi mode; this minimizes the number of headers touched. */ #define SCRATCHSZ 64 /* hopefully long enough */ FIX_PROC_HEAD( machine_name_fix ) { regmatch_t match[2]; const char *line, *base, *limit, *p, *q; regex_t *label_re, *name_re; char scratch[SCRATCHSZ]; size_t len; IGNORE_ARG(filname); IGNORE_ARG(p_fixd); if (!mn_get_regexps (&label_re, &name_re, "machine_name_fix")) { fputs( "The target machine has no needed machine name fixes\n", stderr ); goto done; } scratch[0] = '_'; scratch[1] = '_'; for (base = text; xregexec (label_re, base, 2, match, 0) == 0; base = limit) { base += match[0].rm_eo; /* We're looking at an #if or #ifdef. Scan forward for the next non-escaped newline. */ line = limit = base; do { limit++; limit = strchr (limit, '\n'); if (!limit) goto done; } while (limit[-1] == '\\'); /* If the 'name_pat' matches in between base and limit, we have a bogon. It is not worth the hassle of excluding comments because comments on #if/#ifdef lines are rare, and strings on such lines are illegal. REG_NOTBOL means 'base' is not at the beginning of a line, which shouldn't matter since the name_re has no ^ anchor, but let's be accurate anyway. */ for (;;) { again: if (base == limit) break; if (xregexec (name_re, base, 1, match, REG_NOTBOL)) goto done; /* No remaining match in this file */ /* Match; is it on the line? */ if (match[0].rm_eo > limit - base) break; p = base + match[0].rm_so; base += match[0].rm_eo; /* One more test: if on the same line we have the same string with the appropriate underscores, then leave it alone. We want exactly two leading and trailing underscores. */ if (*p == '_') { len = base - p - ((*base == '_') ? 2 : 1); q = p + 1; } else { len = base - p - ((*base == '_') ? 1 : 0); q = p; } if (len + 4 > SCRATCHSZ) abort (); memcpy (&scratch[2], q, len); len += 2; scratch[len++] = '_'; scratch[len++] = '_'; for (q = line; q <= limit - len; q++) if (*q == '_' && !strncmp (q, scratch, len)) goto again; fwrite (text, 1, p - text, stdout); fwrite (scratch, 1, len, stdout); text = base; } } done: fputs (text, stdout); } FIX_PROC_HEAD( wrap_fix ) { tSCC z_no_wrap_pat[] = "^#if.*__need_"; static regex_t no_wrapping_re; /* assume zeroed data */ tCC* pz_name = NULL; if (no_wrapping_re.allocated == 0) compile_re( z_no_wrap_pat, &no_wrapping_re, 0, "no-wrap pattern", "wrap-fix" ); /* * IF we do *not* match the no-wrap re, then we have a double negative. * A double negative means YES. */ if (xregexec( &no_wrapping_re, text, 0, NULL, 0 ) != 0) { /* * A single file can get wrapped more than once by different fixes. * A single fix can wrap multiple files. Therefore, guard with * *both* the fix name and the file name. */ size_t ln = strlen( filname ) + strlen( p_fixd->fix_name ) + 14; char* pz = XNEWVEC (char, ln); pz_name = pz; sprintf( pz, "FIXINC_WRAP_%s-%s", filname, p_fixd->fix_name ); for (pz += 12; 1; pz++) { char ch = *pz; if (ch == NUL) break; if (! ISALNUM( ch )) { *pz = '_'; } else { *pz = TOUPPER( ch ); } } printf( "#ifndef %s\n", pz_name ); printf( "#define %s 1\n\n", pz_name ); } if (p_fixd->patch_args[1] == (tCC*)NULL) fputs( text, stdout ); else { fputs( p_fixd->patch_args[1], stdout ); fputs( text, stdout ); if (p_fixd->patch_args[2] != (tCC*)NULL) fputs( p_fixd->patch_args[2], stdout ); } if (pz_name != NULL) { printf( "\n#endif /* %s */\n", pz_name ); free( (void*)pz_name ); } } /* * Search for multiple copies of a regular expression. Each block * of matched text is replaced with the format string, as described * above in `format_write'. */ FIX_PROC_HEAD( gnu_type_fix ) { const char* pz_pat; regex_t re; regmatch_t rm[GTYPE_SE_CT+1]; IGNORE_ARG(filname); { tTestDesc* pTD = p_fixd->p_test_desc; int ct = p_fixd->test_ct; for (;;) { if (ct-- <= 0) { fprintf (stderr, zNeedsArg, p_fixd->fix_name, "search text", 1); exit (EXIT_BROKEN); } if (pTD->type == TT_EGREP) { pz_pat = pTD->pz_test_text; break; } pTD++; } } compile_re (pz_pat, &re, 1, "gnu type typedef", "gnu_type_fix"); while (xregexec (&re, text, GTYPE_SE_CT+1, rm, 0) == 0) { text = emit_gnu_type (text, rm); } /* * Dump out the rest of the file */ fputs (text, stdout); } /* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = test for fix selector THIS IS THE ONLY EXPORTED ROUTINE */ void apply_fix( tFixDesc* p_fixd, tCC* filname ) { #define _FT_(n,p) { n, p }, static fix_entry_t fix_table[] = { FIXUP_TABLE { NULL, NULL }}; #undef _FT_ #define FIX_TABLE_CT (ARRAY_SIZE (fix_table)-1) tCC* fixname = p_fixd->patch_args[0]; char* buf; int ct = FIX_TABLE_CT; fix_entry_t* pfe = fix_table; for (;;) { if (strcmp (pfe->fix_name, fixname) == 0) break; if (--ct <= 0) { fprintf (stderr, "fixincl error: the `%s' fix is unknown\n", fixname ); exit (EXIT_BROKEN); } pfe++; } buf = load_file_data (stdin); (*pfe->fix_proc)( filname, buf, p_fixd ); } #ifdef SEPARATE_FIX_PROC tSCC z_usage[] = "USAGE: applyfix <fix-name> <file-to-fix> <file-source> <file-destination>\n"; tSCC z_reopen[] = "FS error %d (%s) reopening %s as std%s\n"; int main( int argc, char** argv ) { tFixDesc* pFix; char* pz_tmptmp; char* pz_tmp_base; char* pz_tmp_dot; if (argc != 5) { usage_failure: fputs (z_usage, stderr); return EXIT_FAILURE; } initialize_opts (); { char* pz = argv[1]; long idx; if (! ISDIGIT ( *pz )) goto usage_failure; idx = strtol (pz, &pz, 10); if ((*pz != NUL) || ((unsigned)idx >= FIX_COUNT)) goto usage_failure; pFix = fixDescList + idx; } if (freopen (argv[3], "r", stdin) != stdin) { fprintf (stderr, z_reopen, errno, strerror( errno ), argv[3], "in"); return EXIT_FAILURE; } pz_tmptmp = XNEWVEC (char, strlen (argv[4]) + 5); strcpy( pz_tmptmp, argv[4] ); /* Don't lose because "12345678" and "12345678X" map to the same file under DOS restricted 8+3 file namespace. Note that DOS doesn't allow more than one dot in the trunk of a file name. */ pz_tmp_base = basename( pz_tmptmp ); pz_tmp_dot = strchr( pz_tmp_base, '.' ); #ifdef _PC_NAME_MAX if (pathconf( pz_tmptmp, _PC_NAME_MAX ) <= 12 /* is this DOS or Windows9X? */ && pz_tmp_dot != (char*)NULL) strcpy (pz_tmp_dot+1, "X"); /* nuke the original extension */ else #endif /* _PC_NAME_MAX */ strcat (pz_tmptmp, ".X"); if (freopen (pz_tmptmp, "w", stdout) != stdout) { fprintf (stderr, z_reopen, errno, strerror( errno ), pz_tmptmp, "out"); return EXIT_FAILURE; } apply_fix (pFix, argv[1]); fclose (stdout); fclose (stdin); unlink (argv[4]); if (rename (pz_tmptmp, argv[4]) != 0) { fprintf (stderr, "error %d (%s) renaming %s to %s\n", errno, strerror( errno ), pz_tmptmp, argv[4]); return EXIT_FAILURE; } return EXIT_SUCCESS; } #endif
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