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grep: fix EXTRA_COMPAT grep to honor -E and -i

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This commit is contained in:
Denis Vlasenko 2008-09-19 21:29:21 +00:00
parent 72fa70af4c
commit c110b7d61f
1 changed files with 30 additions and 1 deletions
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31
findutils/grep.c
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@ -87,7 +87,11 @@ enum {
struct globals {
int max_matches;
#if !ENABLE_EXTRA_COMPAT
int reflags;
#else
RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */
#endif
smalluint invert_search;
smalluint print_filename;
smalluint open_errors;
@ -110,7 +114,19 @@ struct globals {
}; \
} while (0)
#define max_matches (G.max_matches )
#if !ENABLE_EXTRA_COMPAT
#define reflags (G.reflags )
#else
#define case_fold (G.case_fold )
/* http://www.delorie.com/gnu/docs/regex/regex_46.html */
#define reflags re_syntax_options
#undef REG_NOSUB
#undef REG_EXTENDED
#undef REG_ICASE
#define REG_NOSUB bug:is:here /* should not be used */
#define REG_EXTENDED RE_SYNTAX_EGREP
#define REG_ICASE bug:is:here /* should not be used */
#endif
#define invert_search (G.invert_search )
#define print_filename (G.print_filename )
#define open_errors (G.open_errors )
@ -240,6 +256,7 @@ static int grep_file(FILE *file)
xregcomp(&gl->compiled_regex, gl->pattern, reflags);
#else
memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex));
gl->compiled_regex.translate = case_fold; /* for -i */
if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex))
bb_error_msg_and_die("bad regex '%s'", gl->pattern);
#endif
@ -532,8 +549,10 @@ int grep_main(int argc, char **argv)
if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
option_mask32 |= OPT_F;
#if !ENABLE_EXTRA_COMPAT
if (!(option_mask32 & (OPT_o | OPT_w)))
reflags = REG_NOSUB;
#endif
if (ENABLE_FEATURE_GREP_EGREP_ALIAS
&& (applet_name[0] == 'e' || (option_mask32 & OPT_E))
@ -541,8 +560,18 @@ int grep_main(int argc, char **argv)
reflags |= REG_EXTENDED;
}
if (option_mask32 & OPT_i)
if (option_mask32 & OPT_i) {
#if !ENABLE_EXTRA_COMPAT
reflags |= REG_ICASE;
#else
int i;
case_fold = xmalloc(256);
for (i = 0; i < 256; i++)
case_fold[i] = (unsigned char)i;
for (i = 'a'; i <= 'z'; i++)
case_fold[i] = (unsigned char)(i - ('a' - 'A'));
#endif
}
argv += optind;
argc -= optind;