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![Ævar Arnfjörð Bjarmason](/assets/img/avatar_default.png)
Remove the redundant REG_NEWLINE regcomp() flag from the code that compiles a fixed-string regular-expression. The REG_NEWLINE causes metacharacters such as "." to match a newline, since the basic_regex_quote_buf() function being called here escapes all metacharacters using REG_NEWLINE is confusing and redundant. The use of this flag was introduced as an unintended emergent property of793dc676e0
("grep/icase: avoid kwsset when -F is specified", 2016-06-25). That change amended the existing regflags, which were initialized to REG_NEWLINE in init_grep_defaults() assuming a subsequent non-fixed regcomp(). Manual testing reveals that this was always redundant, since no flags of any use were inherited from opt->regflags even back then.793dc676e0
passes all tests with this on top: diff --git a/grep.c b/grep.c index 627ae3e3e8..89e84ed7fd 100644 --- a/grep.c +++ b/grep.c @@ -407,3 +407,3 @@ static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt) basic_regex_quote_buf(&sb, p->pattern); - regflags = opt->regflags & ~REG_EXTENDED; + regflags = 0; if (opt->ignore_case) Since this isn't used for anything and never was, remove it to reduce confusion when reading this code. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2063 lines
49 KiB
C
2063 lines
49 KiB
C
#include "cache.h"
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#include "config.h"
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#include "grep.h"
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#include "userdiff.h"
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#include "xdiff-interface.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "commit.h"
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#include "quote.h"
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static int grep_source_load(struct grep_source *gs);
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static int grep_source_is_binary(struct grep_source *gs);
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static struct grep_opt grep_defaults;
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static void std_output(struct grep_opt *opt, const void *buf, size_t size)
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{
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fwrite(buf, size, 1, stdout);
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}
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/*
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* Initialize the grep_defaults template with hardcoded defaults.
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* We could let the compiler do this, but without C99 initializers
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* the code gets unwieldy and unreadable, so...
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*/
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void init_grep_defaults(void)
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{
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struct grep_opt *opt = &grep_defaults;
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static int run_once;
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if (run_once)
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return;
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run_once++;
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memset(opt, 0, sizeof(*opt));
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opt->relative = 1;
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opt->pathname = 1;
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opt->max_depth = -1;
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opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED;
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color_set(opt->color_context, "");
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color_set(opt->color_filename, "");
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color_set(opt->color_function, "");
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color_set(opt->color_lineno, "");
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color_set(opt->color_match_context, GIT_COLOR_BOLD_RED);
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color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED);
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color_set(opt->color_selected, "");
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color_set(opt->color_sep, GIT_COLOR_CYAN);
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opt->color = -1;
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opt->output = std_output;
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}
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static int parse_pattern_type_arg(const char *opt, const char *arg)
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{
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if (!strcmp(arg, "default"))
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return GREP_PATTERN_TYPE_UNSPECIFIED;
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else if (!strcmp(arg, "basic"))
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return GREP_PATTERN_TYPE_BRE;
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else if (!strcmp(arg, "extended"))
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return GREP_PATTERN_TYPE_ERE;
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else if (!strcmp(arg, "fixed"))
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return GREP_PATTERN_TYPE_FIXED;
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else if (!strcmp(arg, "perl"))
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return GREP_PATTERN_TYPE_PCRE;
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die("bad %s argument: %s", opt, arg);
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}
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/*
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* Read the configuration file once and store it in
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* the grep_defaults template.
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*/
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int grep_config(const char *var, const char *value, void *cb)
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{
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struct grep_opt *opt = &grep_defaults;
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char *color = NULL;
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if (userdiff_config(var, value) < 0)
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return -1;
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if (!strcmp(var, "grep.extendedregexp")) {
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opt->extended_regexp_option = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "grep.patterntype")) {
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opt->pattern_type_option = parse_pattern_type_arg(var, value);
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return 0;
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}
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if (!strcmp(var, "grep.linenumber")) {
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opt->linenum = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "grep.fullname")) {
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opt->relative = !git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "color.grep"))
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opt->color = git_config_colorbool(var, value);
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else if (!strcmp(var, "color.grep.context"))
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color = opt->color_context;
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else if (!strcmp(var, "color.grep.filename"))
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color = opt->color_filename;
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else if (!strcmp(var, "color.grep.function"))
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color = opt->color_function;
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else if (!strcmp(var, "color.grep.linenumber"))
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color = opt->color_lineno;
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else if (!strcmp(var, "color.grep.matchcontext"))
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color = opt->color_match_context;
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else if (!strcmp(var, "color.grep.matchselected"))
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color = opt->color_match_selected;
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else if (!strcmp(var, "color.grep.selected"))
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color = opt->color_selected;
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else if (!strcmp(var, "color.grep.separator"))
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color = opt->color_sep;
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else if (!strcmp(var, "color.grep.match")) {
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int rc = 0;
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if (!value)
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return config_error_nonbool(var);
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rc |= color_parse(value, opt->color_match_context);
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rc |= color_parse(value, opt->color_match_selected);
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return rc;
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}
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if (color) {
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if (!value)
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return config_error_nonbool(var);
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return color_parse(value, color);
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}
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return 0;
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}
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/*
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* Initialize one instance of grep_opt and copy the
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* default values from the template we read the configuration
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* information in an earlier call to git_config(grep_config).
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*/
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void grep_init(struct grep_opt *opt, const char *prefix)
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{
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struct grep_opt *def = &grep_defaults;
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memset(opt, 0, sizeof(*opt));
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opt->prefix = prefix;
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opt->prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
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opt->pattern_tail = &opt->pattern_list;
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opt->header_tail = &opt->header_list;
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opt->color = def->color;
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opt->extended_regexp_option = def->extended_regexp_option;
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opt->pattern_type_option = def->pattern_type_option;
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opt->linenum = def->linenum;
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opt->max_depth = def->max_depth;
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opt->pathname = def->pathname;
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opt->relative = def->relative;
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opt->output = def->output;
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color_set(opt->color_context, def->color_context);
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color_set(opt->color_filename, def->color_filename);
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color_set(opt->color_function, def->color_function);
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color_set(opt->color_lineno, def->color_lineno);
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color_set(opt->color_match_context, def->color_match_context);
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color_set(opt->color_match_selected, def->color_match_selected);
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color_set(opt->color_selected, def->color_selected);
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color_set(opt->color_sep, def->color_sep);
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}
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static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, struct grep_opt *opt)
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{
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/*
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* When committing to the pattern type by setting the relevant
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* fields in grep_opt it's generally not necessary to zero out
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* the fields we're not choosing, since they won't have been
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* set by anything. The extended_regexp_option field is the
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* only exception to this.
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*
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* This is because in the process of parsing grep.patternType
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* & grep.extendedRegexp we set opt->pattern_type_option and
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* opt->extended_regexp_option, respectively. We then
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* internally use opt->extended_regexp_option to see if we're
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* compiling an ERE. It must be unset if that's not actually
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* the case.
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*/
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if (pattern_type != GREP_PATTERN_TYPE_ERE &&
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opt->extended_regexp_option)
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opt->extended_regexp_option = 0;
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switch (pattern_type) {
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case GREP_PATTERN_TYPE_UNSPECIFIED:
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/* fall through */
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case GREP_PATTERN_TYPE_BRE:
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break;
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case GREP_PATTERN_TYPE_ERE:
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opt->extended_regexp_option = 1;
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break;
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case GREP_PATTERN_TYPE_FIXED:
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opt->fixed = 1;
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break;
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case GREP_PATTERN_TYPE_PCRE:
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#ifdef USE_LIBPCRE2
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opt->pcre2 = 1;
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#else
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/*
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* It's important that pcre1 always be assigned to
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* even when there's no USE_LIBPCRE* defined. We still
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* call the PCRE stub function, it just dies with
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* "cannot use Perl-compatible regexes[...]".
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*/
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opt->pcre1 = 1;
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#endif
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break;
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}
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}
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void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)
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{
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if (pattern_type != GREP_PATTERN_TYPE_UNSPECIFIED)
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grep_set_pattern_type_option(pattern_type, opt);
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else if (opt->pattern_type_option != GREP_PATTERN_TYPE_UNSPECIFIED)
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grep_set_pattern_type_option(opt->pattern_type_option, opt);
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else if (opt->extended_regexp_option)
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/*
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* This branch *must* happen after setting from the
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* opt->pattern_type_option above, we don't want
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* grep.extendedRegexp to override grep.patternType!
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*/
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grep_set_pattern_type_option(GREP_PATTERN_TYPE_ERE, opt);
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}
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static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
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const char *origin, int no,
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enum grep_pat_token t,
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enum grep_header_field field)
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{
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struct grep_pat *p = xcalloc(1, sizeof(*p));
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p->pattern = xmemdupz(pat, patlen);
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p->patternlen = patlen;
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p->origin = origin;
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p->no = no;
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p->token = t;
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p->field = field;
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return p;
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}
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static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
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{
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**tail = p;
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*tail = &p->next;
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p->next = NULL;
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switch (p->token) {
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case GREP_PATTERN: /* atom */
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case GREP_PATTERN_HEAD:
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case GREP_PATTERN_BODY:
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for (;;) {
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struct grep_pat *new_pat;
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size_t len = 0;
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char *cp = p->pattern + p->patternlen, *nl = NULL;
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while (++len <= p->patternlen) {
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if (*(--cp) == '\n') {
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nl = cp;
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break;
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}
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}
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if (!nl)
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break;
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new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
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p->no, p->token, p->field);
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new_pat->next = p->next;
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if (!p->next)
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*tail = &new_pat->next;
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p->next = new_pat;
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*nl = '\0';
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p->patternlen -= len;
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}
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break;
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default:
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break;
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}
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}
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void append_header_grep_pattern(struct grep_opt *opt,
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enum grep_header_field field, const char *pat)
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{
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struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
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GREP_PATTERN_HEAD, field);
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if (field == GREP_HEADER_REFLOG)
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opt->use_reflog_filter = 1;
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do_append_grep_pat(&opt->header_tail, p);
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}
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void append_grep_pattern(struct grep_opt *opt, const char *pat,
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const char *origin, int no, enum grep_pat_token t)
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{
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append_grep_pat(opt, pat, strlen(pat), origin, no, t);
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}
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void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
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const char *origin, int no, enum grep_pat_token t)
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{
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struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
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do_append_grep_pat(&opt->pattern_tail, p);
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}
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struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
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{
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struct grep_pat *pat;
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struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
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*ret = *opt;
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ret->pattern_list = NULL;
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ret->pattern_tail = &ret->pattern_list;
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for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
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{
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if(pat->token == GREP_PATTERN_HEAD)
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append_header_grep_pattern(ret, pat->field,
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pat->pattern);
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else
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append_grep_pat(ret, pat->pattern, pat->patternlen,
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pat->origin, pat->no, pat->token);
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}
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return ret;
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}
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static NORETURN void compile_regexp_failed(const struct grep_pat *p,
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const char *error)
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{
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char where[1024];
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if (p->no)
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xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no);
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else if (p->origin)
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xsnprintf(where, sizeof(where), "%s, ", p->origin);
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else
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where[0] = 0;
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die("%s'%s': %s", where, p->pattern, error);
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}
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static int is_fixed(const char *s, size_t len)
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{
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size_t i;
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for (i = 0; i < len; i++) {
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if (is_regex_special(s[i]))
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return 0;
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}
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return 1;
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}
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static int has_null(const char *s, size_t len)
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{
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/*
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* regcomp cannot accept patterns with NULs so when using it
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* we consider any pattern containing a NUL fixed.
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*/
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if (memchr(s, 0, len))
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return 1;
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return 0;
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}
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#ifdef USE_LIBPCRE1
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static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
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{
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const char *error;
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int erroffset;
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int options = PCRE_MULTILINE;
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if (opt->ignore_case) {
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if (has_non_ascii(p->pattern))
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p->pcre1_tables = pcre_maketables();
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options |= PCRE_CASELESS;
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}
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if (is_utf8_locale() && has_non_ascii(p->pattern))
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options |= PCRE_UTF8;
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p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
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p->pcre1_tables);
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if (!p->pcre1_regexp)
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compile_regexp_failed(p, error);
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p->pcre1_extra_info = pcre_study(p->pcre1_regexp, PCRE_STUDY_JIT_COMPILE, &error);
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if (!p->pcre1_extra_info && error)
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die("%s", error);
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#ifdef GIT_PCRE1_USE_JIT
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pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on);
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if (p->pcre1_jit_on == 1) {
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p->pcre1_jit_stack = pcre_jit_stack_alloc(1, 1024 * 1024);
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if (!p->pcre1_jit_stack)
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die("Couldn't allocate PCRE JIT stack");
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pcre_assign_jit_stack(p->pcre1_extra_info, NULL, p->pcre1_jit_stack);
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} else if (p->pcre1_jit_on != 0) {
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die("BUG: The pcre1_jit_on variable should be 0 or 1, not %d",
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p->pcre1_jit_on);
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}
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#endif
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}
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static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
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regmatch_t *match, int eflags)
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{
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int ovector[30], ret, flags = 0;
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if (eflags & REG_NOTBOL)
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flags |= PCRE_NOTBOL;
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#ifdef GIT_PCRE1_USE_JIT
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if (p->pcre1_jit_on) {
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ret = pcre_jit_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
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eol - line, 0, flags, ovector,
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ARRAY_SIZE(ovector), p->pcre1_jit_stack);
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} else
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#endif
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{
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ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line,
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eol - line, 0, flags, ovector,
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ARRAY_SIZE(ovector));
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}
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if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
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die("pcre_exec failed with error code %d", ret);
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if (ret > 0) {
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ret = 0;
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match->rm_so = ovector[0];
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match->rm_eo = ovector[1];
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}
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return ret;
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}
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static void free_pcre1_regexp(struct grep_pat *p)
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{
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pcre_free(p->pcre1_regexp);
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#ifdef GIT_PCRE1_USE_JIT
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if (p->pcre1_jit_on) {
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pcre_free_study(p->pcre1_extra_info);
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pcre_jit_stack_free(p->pcre1_jit_stack);
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} else
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#endif
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{
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pcre_free(p->pcre1_extra_info);
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}
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pcre_free((void *)p->pcre1_tables);
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}
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#else /* !USE_LIBPCRE1 */
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static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
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{
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die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
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}
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static int pcre1match(struct grep_pat *p, const char *line, const char *eol,
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regmatch_t *match, int eflags)
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{
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return 1;
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}
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static void free_pcre1_regexp(struct grep_pat *p)
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{
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}
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#endif /* !USE_LIBPCRE1 */
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|
|
#ifdef USE_LIBPCRE2
|
|
static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
|
|
{
|
|
int error;
|
|
PCRE2_UCHAR errbuf[256];
|
|
PCRE2_SIZE erroffset;
|
|
int options = PCRE2_MULTILINE;
|
|
const uint8_t *character_tables = NULL;
|
|
int jitret;
|
|
|
|
assert(opt->pcre2);
|
|
|
|
p->pcre2_compile_context = NULL;
|
|
|
|
if (opt->ignore_case) {
|
|
if (has_non_ascii(p->pattern)) {
|
|
character_tables = pcre2_maketables(NULL);
|
|
p->pcre2_compile_context = pcre2_compile_context_create(NULL);
|
|
pcre2_set_character_tables(p->pcre2_compile_context, character_tables);
|
|
}
|
|
options |= PCRE2_CASELESS;
|
|
}
|
|
if (is_utf8_locale() && has_non_ascii(p->pattern))
|
|
options |= PCRE2_UTF;
|
|
|
|
p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
|
|
p->patternlen, options, &error, &erroffset,
|
|
p->pcre2_compile_context);
|
|
|
|
if (p->pcre2_pattern) {
|
|
p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, NULL);
|
|
if (!p->pcre2_match_data)
|
|
die("Couldn't allocate PCRE2 match data");
|
|
} else {
|
|
pcre2_get_error_message(error, errbuf, sizeof(errbuf));
|
|
compile_regexp_failed(p, (const char *)&errbuf);
|
|
}
|
|
|
|
pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
|
|
if (p->pcre2_jit_on == 1) {
|
|
jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
|
|
if (jitret)
|
|
die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret);
|
|
p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL);
|
|
if (!p->pcre2_jit_stack)
|
|
die("Couldn't allocate PCRE2 JIT stack");
|
|
p->pcre2_match_context = pcre2_match_context_create(NULL);
|
|
if (!p->pcre2_match_context)
|
|
die("Couldn't allocate PCRE2 match context");
|
|
pcre2_jit_stack_assign(p->pcre2_match_context, NULL, p->pcre2_jit_stack);
|
|
} else if (p->pcre2_jit_on != 0) {
|
|
die("BUG: The pcre2_jit_on variable should be 0 or 1, not %d",
|
|
p->pcre1_jit_on);
|
|
}
|
|
}
|
|
|
|
static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
|
|
regmatch_t *match, int eflags)
|
|
{
|
|
int ret, flags = 0;
|
|
PCRE2_SIZE *ovector;
|
|
PCRE2_UCHAR errbuf[256];
|
|
|
|
if (eflags & REG_NOTBOL)
|
|
flags |= PCRE2_NOTBOL;
|
|
|
|
if (p->pcre2_jit_on)
|
|
ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line,
|
|
eol - line, 0, flags, p->pcre2_match_data,
|
|
NULL);
|
|
else
|
|
ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line,
|
|
eol - line, 0, flags, p->pcre2_match_data,
|
|
NULL);
|
|
|
|
if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) {
|
|
pcre2_get_error_message(ret, errbuf, sizeof(errbuf));
|
|
die("%s failed with error code %d: %s",
|
|
(p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret,
|
|
errbuf);
|
|
}
|
|
if (ret > 0) {
|
|
ovector = pcre2_get_ovector_pointer(p->pcre2_match_data);
|
|
ret = 0;
|
|
match->rm_so = (int)ovector[0];
|
|
match->rm_eo = (int)ovector[1];
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void free_pcre2_pattern(struct grep_pat *p)
|
|
{
|
|
pcre2_compile_context_free(p->pcre2_compile_context);
|
|
pcre2_code_free(p->pcre2_pattern);
|
|
pcre2_match_data_free(p->pcre2_match_data);
|
|
pcre2_jit_stack_free(p->pcre2_jit_stack);
|
|
pcre2_match_context_free(p->pcre2_match_context);
|
|
}
|
|
#else /* !USE_LIBPCRE2 */
|
|
static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
|
|
{
|
|
/*
|
|
* Unreachable until USE_LIBPCRE2 becomes synonymous with
|
|
* USE_LIBPCRE. See the sibling comment in
|
|
* grep_set_pattern_type_option().
|
|
*/
|
|
die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
|
|
}
|
|
|
|
static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
|
|
regmatch_t *match, int eflags)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void free_pcre2_pattern(struct grep_pat *p)
|
|
{
|
|
}
|
|
#endif /* !USE_LIBPCRE2 */
|
|
|
|
static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
|
|
{
|
|
struct strbuf sb = STRBUF_INIT;
|
|
int err;
|
|
int regflags = 0;
|
|
|
|
basic_regex_quote_buf(&sb, p->pattern);
|
|
if (opt->ignore_case)
|
|
regflags |= REG_ICASE;
|
|
err = regcomp(&p->regexp, sb.buf, regflags);
|
|
if (opt->debug)
|
|
fprintf(stderr, "fixed %s\n", sb.buf);
|
|
strbuf_release(&sb);
|
|
if (err) {
|
|
char errbuf[1024];
|
|
regerror(err, &p->regexp, errbuf, sizeof(errbuf));
|
|
regfree(&p->regexp);
|
|
compile_regexp_failed(p, errbuf);
|
|
}
|
|
}
|
|
|
|
static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
|
|
{
|
|
int ascii_only;
|
|
int err;
|
|
int regflags = REG_NEWLINE;
|
|
|
|
p->word_regexp = opt->word_regexp;
|
|
p->ignore_case = opt->ignore_case;
|
|
ascii_only = !has_non_ascii(p->pattern);
|
|
|
|
/*
|
|
* Even when -F (fixed) asks us to do a non-regexp search, we
|
|
* may not be able to correctly case-fold when -i
|
|
* (ignore-case) is asked (in which case, we'll synthesize a
|
|
* regexp to match the pattern that matches regexp special
|
|
* characters literally, while ignoring case differences). On
|
|
* the other hand, even without -F, if the pattern does not
|
|
* have any regexp special characters and there is no need for
|
|
* case-folding search, we can internally turn it into a
|
|
* simple string match using kws. p->fixed tells us if we
|
|
* want to use kws.
|
|
*/
|
|
if (opt->fixed ||
|
|
has_null(p->pattern, p->patternlen) ||
|
|
is_fixed(p->pattern, p->patternlen))
|
|
p->fixed = !p->ignore_case || ascii_only;
|
|
|
|
if (p->fixed) {
|
|
p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL);
|
|
kwsincr(p->kws, p->pattern, p->patternlen);
|
|
kwsprep(p->kws);
|
|
return;
|
|
} else if (opt->fixed) {
|
|
/*
|
|
* We come here when the pattern has the non-ascii
|
|
* characters we cannot case-fold, and asked to
|
|
* ignore-case.
|
|
*/
|
|
compile_fixed_regexp(p, opt);
|
|
return;
|
|
}
|
|
|
|
if (opt->pcre2) {
|
|
compile_pcre2_pattern(p, opt);
|
|
return;
|
|
}
|
|
|
|
if (opt->pcre1) {
|
|
compile_pcre1_regexp(p, opt);
|
|
return;
|
|
}
|
|
|
|
if (p->ignore_case)
|
|
regflags |= REG_ICASE;
|
|
if (opt->extended_regexp_option)
|
|
regflags |= REG_EXTENDED;
|
|
err = regcomp(&p->regexp, p->pattern, regflags);
|
|
if (err) {
|
|
char errbuf[1024];
|
|
regerror(err, &p->regexp, errbuf, 1024);
|
|
regfree(&p->regexp);
|
|
compile_regexp_failed(p, errbuf);
|
|
}
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_or(struct grep_pat **);
|
|
static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x;
|
|
|
|
p = *list;
|
|
if (!p)
|
|
return NULL;
|
|
switch (p->token) {
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
x = xcalloc(1, sizeof (struct grep_expr));
|
|
x->node = GREP_NODE_ATOM;
|
|
x->u.atom = p;
|
|
*list = p->next;
|
|
return x;
|
|
case GREP_OPEN_PAREN:
|
|
*list = p->next;
|
|
x = compile_pattern_or(list);
|
|
if (!*list || (*list)->token != GREP_CLOSE_PAREN)
|
|
die("unmatched parenthesis");
|
|
*list = (*list)->next;
|
|
return x;
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_not(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x;
|
|
|
|
p = *list;
|
|
if (!p)
|
|
return NULL;
|
|
switch (p->token) {
|
|
case GREP_NOT:
|
|
if (!p->next)
|
|
die("--not not followed by pattern expression");
|
|
*list = p->next;
|
|
x = xcalloc(1, sizeof (struct grep_expr));
|
|
x->node = GREP_NODE_NOT;
|
|
x->u.unary = compile_pattern_not(list);
|
|
if (!x->u.unary)
|
|
die("--not followed by non pattern expression");
|
|
return x;
|
|
default:
|
|
return compile_pattern_atom(list);
|
|
}
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_and(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x, *y, *z;
|
|
|
|
x = compile_pattern_not(list);
|
|
p = *list;
|
|
if (p && p->token == GREP_AND) {
|
|
if (!p->next)
|
|
die("--and not followed by pattern expression");
|
|
*list = p->next;
|
|
y = compile_pattern_and(list);
|
|
if (!y)
|
|
die("--and not followed by pattern expression");
|
|
z = xcalloc(1, sizeof (struct grep_expr));
|
|
z->node = GREP_NODE_AND;
|
|
z->u.binary.left = x;
|
|
z->u.binary.right = y;
|
|
return z;
|
|
}
|
|
return x;
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_or(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x, *y, *z;
|
|
|
|
x = compile_pattern_and(list);
|
|
p = *list;
|
|
if (x && p && p->token != GREP_CLOSE_PAREN) {
|
|
y = compile_pattern_or(list);
|
|
if (!y)
|
|
die("not a pattern expression %s", p->pattern);
|
|
z = xcalloc(1, sizeof (struct grep_expr));
|
|
z->node = GREP_NODE_OR;
|
|
z->u.binary.left = x;
|
|
z->u.binary.right = y;
|
|
return z;
|
|
}
|
|
return x;
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
|
|
{
|
|
return compile_pattern_or(list);
|
|
}
|
|
|
|
static void indent(int in)
|
|
{
|
|
while (in-- > 0)
|
|
fputc(' ', stderr);
|
|
}
|
|
|
|
static void dump_grep_pat(struct grep_pat *p)
|
|
{
|
|
switch (p->token) {
|
|
case GREP_AND: fprintf(stderr, "*and*"); break;
|
|
case GREP_OPEN_PAREN: fprintf(stderr, "*(*"); break;
|
|
case GREP_CLOSE_PAREN: fprintf(stderr, "*)*"); break;
|
|
case GREP_NOT: fprintf(stderr, "*not*"); break;
|
|
case GREP_OR: fprintf(stderr, "*or*"); break;
|
|
|
|
case GREP_PATTERN: fprintf(stderr, "pattern"); break;
|
|
case GREP_PATTERN_HEAD: fprintf(stderr, "pattern_head"); break;
|
|
case GREP_PATTERN_BODY: fprintf(stderr, "pattern_body"); break;
|
|
}
|
|
|
|
switch (p->token) {
|
|
default: break;
|
|
case GREP_PATTERN_HEAD:
|
|
fprintf(stderr, "<head %d>", p->field); break;
|
|
case GREP_PATTERN_BODY:
|
|
fprintf(stderr, "<body>"); break;
|
|
}
|
|
switch (p->token) {
|
|
default: break;
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
case GREP_PATTERN:
|
|
fprintf(stderr, "%.*s", (int)p->patternlen, p->pattern);
|
|
break;
|
|
}
|
|
fputc('\n', stderr);
|
|
}
|
|
|
|
static void dump_grep_expression_1(struct grep_expr *x, int in)
|
|
{
|
|
indent(in);
|
|
switch (x->node) {
|
|
case GREP_NODE_TRUE:
|
|
fprintf(stderr, "true\n");
|
|
break;
|
|
case GREP_NODE_ATOM:
|
|
dump_grep_pat(x->u.atom);
|
|
break;
|
|
case GREP_NODE_NOT:
|
|
fprintf(stderr, "(not\n");
|
|
dump_grep_expression_1(x->u.unary, in+1);
|
|
indent(in);
|
|
fprintf(stderr, ")\n");
|
|
break;
|
|
case GREP_NODE_AND:
|
|
fprintf(stderr, "(and\n");
|
|
dump_grep_expression_1(x->u.binary.left, in+1);
|
|
dump_grep_expression_1(x->u.binary.right, in+1);
|
|
indent(in);
|
|
fprintf(stderr, ")\n");
|
|
break;
|
|
case GREP_NODE_OR:
|
|
fprintf(stderr, "(or\n");
|
|
dump_grep_expression_1(x->u.binary.left, in+1);
|
|
dump_grep_expression_1(x->u.binary.right, in+1);
|
|
indent(in);
|
|
fprintf(stderr, ")\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void dump_grep_expression(struct grep_opt *opt)
|
|
{
|
|
struct grep_expr *x = opt->pattern_expression;
|
|
|
|
if (opt->all_match)
|
|
fprintf(stderr, "[all-match]\n");
|
|
dump_grep_expression_1(x, 0);
|
|
fflush(NULL);
|
|
}
|
|
|
|
static struct grep_expr *grep_true_expr(void)
|
|
{
|
|
struct grep_expr *z = xcalloc(1, sizeof(*z));
|
|
z->node = GREP_NODE_TRUE;
|
|
return z;
|
|
}
|
|
|
|
static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
|
|
{
|
|
struct grep_expr *z = xcalloc(1, sizeof(*z));
|
|
z->node = GREP_NODE_OR;
|
|
z->u.binary.left = left;
|
|
z->u.binary.right = right;
|
|
return z;
|
|
}
|
|
|
|
static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *header_expr;
|
|
struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
|
|
enum grep_header_field fld;
|
|
|
|
if (!opt->header_list)
|
|
return NULL;
|
|
|
|
for (p = opt->header_list; p; p = p->next) {
|
|
if (p->token != GREP_PATTERN_HEAD)
|
|
die("BUG: a non-header pattern in grep header list.");
|
|
if (p->field < GREP_HEADER_FIELD_MIN ||
|
|
GREP_HEADER_FIELD_MAX <= p->field)
|
|
die("BUG: unknown header field %d", p->field);
|
|
compile_regexp(p, opt);
|
|
}
|
|
|
|
for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
|
|
header_group[fld] = NULL;
|
|
|
|
for (p = opt->header_list; p; p = p->next) {
|
|
struct grep_expr *h;
|
|
struct grep_pat *pp = p;
|
|
|
|
h = compile_pattern_atom(&pp);
|
|
if (!h || pp != p->next)
|
|
die("BUG: malformed header expr");
|
|
if (!header_group[p->field]) {
|
|
header_group[p->field] = h;
|
|
continue;
|
|
}
|
|
header_group[p->field] = grep_or_expr(h, header_group[p->field]);
|
|
}
|
|
|
|
header_expr = NULL;
|
|
|
|
for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
|
|
if (!header_group[fld])
|
|
continue;
|
|
if (!header_expr)
|
|
header_expr = grep_true_expr();
|
|
header_expr = grep_or_expr(header_group[fld], header_expr);
|
|
}
|
|
return header_expr;
|
|
}
|
|
|
|
static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
|
|
{
|
|
struct grep_expr *z = x;
|
|
|
|
while (x) {
|
|
assert(x->node == GREP_NODE_OR);
|
|
if (x->u.binary.right &&
|
|
x->u.binary.right->node == GREP_NODE_TRUE) {
|
|
x->u.binary.right = y;
|
|
break;
|
|
}
|
|
x = x->u.binary.right;
|
|
}
|
|
return z;
|
|
}
|
|
|
|
static void compile_grep_patterns_real(struct grep_opt *opt)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *header_expr = prep_header_patterns(opt);
|
|
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
switch (p->token) {
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
compile_regexp(p, opt);
|
|
break;
|
|
default:
|
|
opt->extended = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (opt->all_match || header_expr)
|
|
opt->extended = 1;
|
|
else if (!opt->extended && !opt->debug)
|
|
return;
|
|
|
|
p = opt->pattern_list;
|
|
if (p)
|
|
opt->pattern_expression = compile_pattern_expr(&p);
|
|
if (p)
|
|
die("incomplete pattern expression: %s", p->pattern);
|
|
|
|
if (!header_expr)
|
|
return;
|
|
|
|
if (!opt->pattern_expression)
|
|
opt->pattern_expression = header_expr;
|
|
else if (opt->all_match)
|
|
opt->pattern_expression = grep_splice_or(header_expr,
|
|
opt->pattern_expression);
|
|
else
|
|
opt->pattern_expression = grep_or_expr(opt->pattern_expression,
|
|
header_expr);
|
|
opt->all_match = 1;
|
|
}
|
|
|
|
void compile_grep_patterns(struct grep_opt *opt)
|
|
{
|
|
compile_grep_patterns_real(opt);
|
|
if (opt->debug)
|
|
dump_grep_expression(opt);
|
|
}
|
|
|
|
static void free_pattern_expr(struct grep_expr *x)
|
|
{
|
|
switch (x->node) {
|
|
case GREP_NODE_TRUE:
|
|
case GREP_NODE_ATOM:
|
|
break;
|
|
case GREP_NODE_NOT:
|
|
free_pattern_expr(x->u.unary);
|
|
break;
|
|
case GREP_NODE_AND:
|
|
case GREP_NODE_OR:
|
|
free_pattern_expr(x->u.binary.left);
|
|
free_pattern_expr(x->u.binary.right);
|
|
break;
|
|
}
|
|
free(x);
|
|
}
|
|
|
|
void free_grep_patterns(struct grep_opt *opt)
|
|
{
|
|
struct grep_pat *p, *n;
|
|
|
|
for (p = opt->pattern_list; p; p = n) {
|
|
n = p->next;
|
|
switch (p->token) {
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
if (p->kws)
|
|
kwsfree(p->kws);
|
|
else if (p->pcre1_regexp)
|
|
free_pcre1_regexp(p);
|
|
else if (p->pcre2_pattern)
|
|
free_pcre2_pattern(p);
|
|
else
|
|
regfree(&p->regexp);
|
|
free(p->pattern);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
free(p);
|
|
}
|
|
|
|
if (!opt->extended)
|
|
return;
|
|
free_pattern_expr(opt->pattern_expression);
|
|
}
|
|
|
|
static char *end_of_line(char *cp, unsigned long *left)
|
|
{
|
|
unsigned long l = *left;
|
|
while (l && *cp != '\n') {
|
|
l--;
|
|
cp++;
|
|
}
|
|
*left = l;
|
|
return cp;
|
|
}
|
|
|
|
static int word_char(char ch)
|
|
{
|
|
return isalnum(ch) || ch == '_';
|
|
}
|
|
|
|
static void output_color(struct grep_opt *opt, const void *data, size_t size,
|
|
const char *color)
|
|
{
|
|
if (want_color(opt->color) && color && color[0]) {
|
|
opt->output(opt, color, strlen(color));
|
|
opt->output(opt, data, size);
|
|
opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
|
|
} else
|
|
opt->output(opt, data, size);
|
|
}
|
|
|
|
static void output_sep(struct grep_opt *opt, char sign)
|
|
{
|
|
if (opt->null_following_name)
|
|
opt->output(opt, "\0", 1);
|
|
else
|
|
output_color(opt, &sign, 1, opt->color_sep);
|
|
}
|
|
|
|
static void show_name(struct grep_opt *opt, const char *name)
|
|
{
|
|
output_color(opt, name, strlen(name), opt->color_filename);
|
|
opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
|
|
}
|
|
|
|
static int fixmatch(struct grep_pat *p, char *line, char *eol,
|
|
regmatch_t *match)
|
|
{
|
|
struct kwsmatch kwsm;
|
|
size_t offset = kwsexec(p->kws, line, eol - line, &kwsm);
|
|
if (offset == -1) {
|
|
match->rm_so = match->rm_eo = -1;
|
|
return REG_NOMATCH;
|
|
} else {
|
|
match->rm_so = offset;
|
|
match->rm_eo = match->rm_so + kwsm.size[0];
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int patmatch(struct grep_pat *p, char *line, char *eol,
|
|
regmatch_t *match, int eflags)
|
|
{
|
|
int hit;
|
|
|
|
if (p->fixed)
|
|
hit = !fixmatch(p, line, eol, match);
|
|
else if (p->pcre1_regexp)
|
|
hit = !pcre1match(p, line, eol, match, eflags);
|
|
else if (p->pcre2_pattern)
|
|
hit = !pcre2match(p, line, eol, match, eflags);
|
|
else
|
|
hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
|
|
eflags);
|
|
|
|
return hit;
|
|
}
|
|
|
|
static int strip_timestamp(char *bol, char **eol_p)
|
|
{
|
|
char *eol = *eol_p;
|
|
int ch;
|
|
|
|
while (bol < --eol) {
|
|
if (*eol != '>')
|
|
continue;
|
|
*eol_p = ++eol;
|
|
ch = *eol;
|
|
*eol = '\0';
|
|
return ch;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct {
|
|
const char *field;
|
|
size_t len;
|
|
} header_field[] = {
|
|
{ "author ", 7 },
|
|
{ "committer ", 10 },
|
|
{ "reflog ", 7 },
|
|
};
|
|
|
|
static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
|
|
enum grep_context ctx,
|
|
regmatch_t *pmatch, int eflags)
|
|
{
|
|
int hit = 0;
|
|
int saved_ch = 0;
|
|
const char *start = bol;
|
|
|
|
if ((p->token != GREP_PATTERN) &&
|
|
((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
|
|
return 0;
|
|
|
|
if (p->token == GREP_PATTERN_HEAD) {
|
|
const char *field;
|
|
size_t len;
|
|
assert(p->field < ARRAY_SIZE(header_field));
|
|
field = header_field[p->field].field;
|
|
len = header_field[p->field].len;
|
|
if (strncmp(bol, field, len))
|
|
return 0;
|
|
bol += len;
|
|
switch (p->field) {
|
|
case GREP_HEADER_AUTHOR:
|
|
case GREP_HEADER_COMMITTER:
|
|
saved_ch = strip_timestamp(bol, &eol);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
again:
|
|
hit = patmatch(p, bol, eol, pmatch, eflags);
|
|
|
|
if (hit && p->word_regexp) {
|
|
if ((pmatch[0].rm_so < 0) ||
|
|
(eol - bol) < pmatch[0].rm_so ||
|
|
(pmatch[0].rm_eo < 0) ||
|
|
(eol - bol) < pmatch[0].rm_eo)
|
|
die("regexp returned nonsense");
|
|
|
|
/* Match beginning must be either beginning of the
|
|
* line, or at word boundary (i.e. the last char must
|
|
* not be a word char). Similarly, match end must be
|
|
* either end of the line, or at word boundary
|
|
* (i.e. the next char must not be a word char).
|
|
*/
|
|
if ( ((pmatch[0].rm_so == 0) ||
|
|
!word_char(bol[pmatch[0].rm_so-1])) &&
|
|
((pmatch[0].rm_eo == (eol-bol)) ||
|
|
!word_char(bol[pmatch[0].rm_eo])) )
|
|
;
|
|
else
|
|
hit = 0;
|
|
|
|
/* Words consist of at least one character. */
|
|
if (pmatch->rm_so == pmatch->rm_eo)
|
|
hit = 0;
|
|
|
|
if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
|
|
/* There could be more than one match on the
|
|
* line, and the first match might not be
|
|
* strict word match. But later ones could be!
|
|
* Forward to the next possible start, i.e. the
|
|
* next position following a non-word char.
|
|
*/
|
|
bol = pmatch[0].rm_so + bol + 1;
|
|
while (word_char(bol[-1]) && bol < eol)
|
|
bol++;
|
|
eflags |= REG_NOTBOL;
|
|
if (bol < eol)
|
|
goto again;
|
|
}
|
|
}
|
|
if (p->token == GREP_PATTERN_HEAD && saved_ch)
|
|
*eol = saved_ch;
|
|
if (hit) {
|
|
pmatch[0].rm_so += bol - start;
|
|
pmatch[0].rm_eo += bol - start;
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static int match_expr_eval(struct grep_expr *x, char *bol, char *eol,
|
|
enum grep_context ctx, int collect_hits)
|
|
{
|
|
int h = 0;
|
|
regmatch_t match;
|
|
|
|
if (!x)
|
|
die("Not a valid grep expression");
|
|
switch (x->node) {
|
|
case GREP_NODE_TRUE:
|
|
h = 1;
|
|
break;
|
|
case GREP_NODE_ATOM:
|
|
h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0);
|
|
break;
|
|
case GREP_NODE_NOT:
|
|
h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0);
|
|
break;
|
|
case GREP_NODE_AND:
|
|
if (!match_expr_eval(x->u.binary.left, bol, eol, ctx, 0))
|
|
return 0;
|
|
h = match_expr_eval(x->u.binary.right, bol, eol, ctx, 0);
|
|
break;
|
|
case GREP_NODE_OR:
|
|
if (!collect_hits)
|
|
return (match_expr_eval(x->u.binary.left,
|
|
bol, eol, ctx, 0) ||
|
|
match_expr_eval(x->u.binary.right,
|
|
bol, eol, ctx, 0));
|
|
h = match_expr_eval(x->u.binary.left, bol, eol, ctx, 0);
|
|
x->u.binary.left->hit |= h;
|
|
h |= match_expr_eval(x->u.binary.right, bol, eol, ctx, 1);
|
|
break;
|
|
default:
|
|
die("Unexpected node type (internal error) %d", x->node);
|
|
}
|
|
if (collect_hits)
|
|
x->hit |= h;
|
|
return h;
|
|
}
|
|
|
|
static int match_expr(struct grep_opt *opt, char *bol, char *eol,
|
|
enum grep_context ctx, int collect_hits)
|
|
{
|
|
struct grep_expr *x = opt->pattern_expression;
|
|
return match_expr_eval(x, bol, eol, ctx, collect_hits);
|
|
}
|
|
|
|
static int match_line(struct grep_opt *opt, char *bol, char *eol,
|
|
enum grep_context ctx, int collect_hits)
|
|
{
|
|
struct grep_pat *p;
|
|
regmatch_t match;
|
|
|
|
if (opt->extended)
|
|
return match_expr(opt, bol, eol, ctx, collect_hits);
|
|
|
|
/* we do not call with collect_hits without being extended */
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
if (match_one_pattern(p, bol, eol, ctx, &match, 0))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int match_next_pattern(struct grep_pat *p, char *bol, char *eol,
|
|
enum grep_context ctx,
|
|
regmatch_t *pmatch, int eflags)
|
|
{
|
|
regmatch_t match;
|
|
|
|
if (!match_one_pattern(p, bol, eol, ctx, &match, eflags))
|
|
return 0;
|
|
if (match.rm_so < 0 || match.rm_eo < 0)
|
|
return 0;
|
|
if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
|
|
if (match.rm_so > pmatch->rm_so)
|
|
return 1;
|
|
if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
|
|
return 1;
|
|
}
|
|
pmatch->rm_so = match.rm_so;
|
|
pmatch->rm_eo = match.rm_eo;
|
|
return 1;
|
|
}
|
|
|
|
static int next_match(struct grep_opt *opt, char *bol, char *eol,
|
|
enum grep_context ctx, regmatch_t *pmatch, int eflags)
|
|
{
|
|
struct grep_pat *p;
|
|
int hit = 0;
|
|
|
|
pmatch->rm_so = pmatch->rm_eo = -1;
|
|
if (bol < eol) {
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
switch (p->token) {
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
hit |= match_next_pattern(p, bol, eol, ctx,
|
|
pmatch, eflags);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static void show_line(struct grep_opt *opt, char *bol, char *eol,
|
|
const char *name, unsigned lno, char sign)
|
|
{
|
|
int rest = eol - bol;
|
|
const char *match_color, *line_color = NULL;
|
|
|
|
if (opt->file_break && opt->last_shown == 0) {
|
|
if (opt->show_hunk_mark)
|
|
opt->output(opt, "\n", 1);
|
|
} else if (opt->pre_context || opt->post_context || opt->funcbody) {
|
|
if (opt->last_shown == 0) {
|
|
if (opt->show_hunk_mark) {
|
|
output_color(opt, "--", 2, opt->color_sep);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
} else if (lno > opt->last_shown + 1) {
|
|
output_color(opt, "--", 2, opt->color_sep);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
}
|
|
if (opt->heading && opt->last_shown == 0) {
|
|
output_color(opt, name, strlen(name), opt->color_filename);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
opt->last_shown = lno;
|
|
|
|
if (!opt->heading && opt->pathname) {
|
|
output_color(opt, name, strlen(name), opt->color_filename);
|
|
output_sep(opt, sign);
|
|
}
|
|
if (opt->linenum) {
|
|
char buf[32];
|
|
xsnprintf(buf, sizeof(buf), "%d", lno);
|
|
output_color(opt, buf, strlen(buf), opt->color_lineno);
|
|
output_sep(opt, sign);
|
|
}
|
|
if (opt->color) {
|
|
regmatch_t match;
|
|
enum grep_context ctx = GREP_CONTEXT_BODY;
|
|
int ch = *eol;
|
|
int eflags = 0;
|
|
|
|
if (sign == ':')
|
|
match_color = opt->color_match_selected;
|
|
else
|
|
match_color = opt->color_match_context;
|
|
if (sign == ':')
|
|
line_color = opt->color_selected;
|
|
else if (sign == '-')
|
|
line_color = opt->color_context;
|
|
else if (sign == '=')
|
|
line_color = opt->color_function;
|
|
*eol = '\0';
|
|
while (next_match(opt, bol, eol, ctx, &match, eflags)) {
|
|
if (match.rm_so == match.rm_eo)
|
|
break;
|
|
|
|
output_color(opt, bol, match.rm_so, line_color);
|
|
output_color(opt, bol + match.rm_so,
|
|
match.rm_eo - match.rm_so, match_color);
|
|
bol += match.rm_eo;
|
|
rest -= match.rm_eo;
|
|
eflags = REG_NOTBOL;
|
|
}
|
|
*eol = ch;
|
|
}
|
|
output_color(opt, bol, rest, line_color);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
|
|
#ifndef NO_PTHREADS
|
|
int grep_use_locks;
|
|
|
|
/*
|
|
* This lock protects access to the gitattributes machinery, which is
|
|
* not thread-safe.
|
|
*/
|
|
pthread_mutex_t grep_attr_mutex;
|
|
|
|
static inline void grep_attr_lock(void)
|
|
{
|
|
if (grep_use_locks)
|
|
pthread_mutex_lock(&grep_attr_mutex);
|
|
}
|
|
|
|
static inline void grep_attr_unlock(void)
|
|
{
|
|
if (grep_use_locks)
|
|
pthread_mutex_unlock(&grep_attr_mutex);
|
|
}
|
|
|
|
/*
|
|
* Same as git_attr_mutex, but protecting the thread-unsafe object db access.
|
|
*/
|
|
pthread_mutex_t grep_read_mutex;
|
|
|
|
#else
|
|
#define grep_attr_lock()
|
|
#define grep_attr_unlock()
|
|
#endif
|
|
|
|
static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol)
|
|
{
|
|
xdemitconf_t *xecfg = opt->priv;
|
|
if (xecfg && !xecfg->find_func) {
|
|
grep_source_load_driver(gs);
|
|
if (gs->driver->funcname.pattern) {
|
|
const struct userdiff_funcname *pe = &gs->driver->funcname;
|
|
xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
|
|
} else {
|
|
xecfg = opt->priv = NULL;
|
|
}
|
|
}
|
|
|
|
if (xecfg) {
|
|
char buf[1];
|
|
return xecfg->find_func(bol, eol - bol, buf, 1,
|
|
xecfg->find_func_priv) >= 0;
|
|
}
|
|
|
|
if (bol == eol)
|
|
return 0;
|
|
if (isalpha(*bol) || *bol == '_' || *bol == '$')
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
|
|
char *bol, unsigned lno)
|
|
{
|
|
while (bol > gs->buf) {
|
|
char *eol = --bol;
|
|
|
|
while (bol > gs->buf && bol[-1] != '\n')
|
|
bol--;
|
|
lno--;
|
|
|
|
if (lno <= opt->last_shown)
|
|
break;
|
|
|
|
if (match_funcname(opt, gs, bol, eol)) {
|
|
show_line(opt, bol, eol, gs->name, lno, '=');
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
|
|
char *bol, char *end, unsigned lno)
|
|
{
|
|
unsigned cur = lno, from = 1, funcname_lno = 0;
|
|
int funcname_needed = !!opt->funcname;
|
|
|
|
if (opt->funcbody && !match_funcname(opt, gs, bol, end))
|
|
funcname_needed = 2;
|
|
|
|
if (opt->pre_context < lno)
|
|
from = lno - opt->pre_context;
|
|
if (from <= opt->last_shown)
|
|
from = opt->last_shown + 1;
|
|
|
|
/* Rewind. */
|
|
while (bol > gs->buf &&
|
|
cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) {
|
|
char *eol = --bol;
|
|
|
|
while (bol > gs->buf && bol[-1] != '\n')
|
|
bol--;
|
|
cur--;
|
|
if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
|
|
funcname_lno = cur;
|
|
funcname_needed = 0;
|
|
}
|
|
}
|
|
|
|
/* We need to look even further back to find a function signature. */
|
|
if (opt->funcname && funcname_needed)
|
|
show_funcname_line(opt, gs, bol, cur);
|
|
|
|
/* Back forward. */
|
|
while (cur < lno) {
|
|
char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
|
|
|
|
while (*eol != '\n')
|
|
eol++;
|
|
show_line(opt, bol, eol, gs->name, cur, sign);
|
|
bol = eol + 1;
|
|
cur++;
|
|
}
|
|
}
|
|
|
|
static int should_lookahead(struct grep_opt *opt)
|
|
{
|
|
struct grep_pat *p;
|
|
|
|
if (opt->extended)
|
|
return 0; /* punt for too complex stuff */
|
|
if (opt->invert)
|
|
return 0;
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
if (p->token != GREP_PATTERN)
|
|
return 0; /* punt for "header only" and stuff */
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int look_ahead(struct grep_opt *opt,
|
|
unsigned long *left_p,
|
|
unsigned *lno_p,
|
|
char **bol_p)
|
|
{
|
|
unsigned lno = *lno_p;
|
|
char *bol = *bol_p;
|
|
struct grep_pat *p;
|
|
char *sp, *last_bol;
|
|
regoff_t earliest = -1;
|
|
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
int hit;
|
|
regmatch_t m;
|
|
|
|
hit = patmatch(p, bol, bol + *left_p, &m, 0);
|
|
if (!hit || m.rm_so < 0 || m.rm_eo < 0)
|
|
continue;
|
|
if (earliest < 0 || m.rm_so < earliest)
|
|
earliest = m.rm_so;
|
|
}
|
|
|
|
if (earliest < 0) {
|
|
*bol_p = bol + *left_p;
|
|
*left_p = 0;
|
|
return 1;
|
|
}
|
|
for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
|
|
; /* find the beginning of the line */
|
|
last_bol = sp;
|
|
|
|
for (sp = bol; sp < last_bol; sp++) {
|
|
if (*sp == '\n')
|
|
lno++;
|
|
}
|
|
*left_p -= last_bol - bol;
|
|
*bol_p = last_bol;
|
|
*lno_p = lno;
|
|
return 0;
|
|
}
|
|
|
|
static int fill_textconv_grep(struct userdiff_driver *driver,
|
|
struct grep_source *gs)
|
|
{
|
|
struct diff_filespec *df;
|
|
char *buf;
|
|
size_t size;
|
|
|
|
if (!driver || !driver->textconv)
|
|
return grep_source_load(gs);
|
|
|
|
/*
|
|
* The textconv interface is intimately tied to diff_filespecs, so we
|
|
* have to pretend to be one. If we could unify the grep_source
|
|
* and diff_filespec structs, this mess could just go away.
|
|
*/
|
|
df = alloc_filespec(gs->path);
|
|
switch (gs->type) {
|
|
case GREP_SOURCE_OID:
|
|
fill_filespec(df, gs->identifier, 1, 0100644);
|
|
break;
|
|
case GREP_SOURCE_FILE:
|
|
fill_filespec(df, &null_oid, 0, 0100644);
|
|
break;
|
|
default:
|
|
die("BUG: attempt to textconv something without a path?");
|
|
}
|
|
|
|
/*
|
|
* fill_textconv is not remotely thread-safe; it may load objects
|
|
* behind the scenes, and it modifies the global diff tempfile
|
|
* structure.
|
|
*/
|
|
grep_read_lock();
|
|
size = fill_textconv(driver, df, &buf);
|
|
grep_read_unlock();
|
|
free_filespec(df);
|
|
|
|
/*
|
|
* The normal fill_textconv usage by the diff machinery would just keep
|
|
* the textconv'd buf separate from the diff_filespec. But much of the
|
|
* grep code passes around a grep_source and assumes that its "buf"
|
|
* pointer is the beginning of the thing we are searching. So let's
|
|
* install our textconv'd version into the grep_source, taking care not
|
|
* to leak any existing buffer.
|
|
*/
|
|
grep_source_clear_data(gs);
|
|
gs->buf = buf;
|
|
gs->size = size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int is_empty_line(const char *bol, const char *eol)
|
|
{
|
|
while (bol < eol && isspace(*bol))
|
|
bol++;
|
|
return bol == eol;
|
|
}
|
|
|
|
static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
|
|
{
|
|
char *bol;
|
|
char *peek_bol = NULL;
|
|
unsigned long left;
|
|
unsigned lno = 1;
|
|
unsigned last_hit = 0;
|
|
int binary_match_only = 0;
|
|
unsigned count = 0;
|
|
int try_lookahead = 0;
|
|
int show_function = 0;
|
|
struct userdiff_driver *textconv = NULL;
|
|
enum grep_context ctx = GREP_CONTEXT_HEAD;
|
|
xdemitconf_t xecfg;
|
|
|
|
if (!opt->output)
|
|
opt->output = std_output;
|
|
|
|
if (opt->pre_context || opt->post_context || opt->file_break ||
|
|
opt->funcbody) {
|
|
/* Show hunk marks, except for the first file. */
|
|
if (opt->last_shown)
|
|
opt->show_hunk_mark = 1;
|
|
/*
|
|
* If we're using threads then we can't easily identify
|
|
* the first file. Always put hunk marks in that case
|
|
* and skip the very first one later in work_done().
|
|
*/
|
|
if (opt->output != std_output)
|
|
opt->show_hunk_mark = 1;
|
|
}
|
|
opt->last_shown = 0;
|
|
|
|
if (opt->allow_textconv) {
|
|
grep_source_load_driver(gs);
|
|
/*
|
|
* We might set up the shared textconv cache data here, which
|
|
* is not thread-safe.
|
|
*/
|
|
grep_attr_lock();
|
|
textconv = userdiff_get_textconv(gs->driver);
|
|
grep_attr_unlock();
|
|
}
|
|
|
|
/*
|
|
* We know the result of a textconv is text, so we only have to care
|
|
* about binary handling if we are not using it.
|
|
*/
|
|
if (!textconv) {
|
|
switch (opt->binary) {
|
|
case GREP_BINARY_DEFAULT:
|
|
if (grep_source_is_binary(gs))
|
|
binary_match_only = 1;
|
|
break;
|
|
case GREP_BINARY_NOMATCH:
|
|
if (grep_source_is_binary(gs))
|
|
return 0; /* Assume unmatch */
|
|
break;
|
|
case GREP_BINARY_TEXT:
|
|
break;
|
|
default:
|
|
die("BUG: unknown binary handling mode");
|
|
}
|
|
}
|
|
|
|
memset(&xecfg, 0, sizeof(xecfg));
|
|
opt->priv = &xecfg;
|
|
|
|
try_lookahead = should_lookahead(opt);
|
|
|
|
if (fill_textconv_grep(textconv, gs) < 0)
|
|
return 0;
|
|
|
|
bol = gs->buf;
|
|
left = gs->size;
|
|
while (left) {
|
|
char *eol, ch;
|
|
int hit;
|
|
|
|
/*
|
|
* look_ahead() skips quickly to the line that possibly
|
|
* has the next hit; don't call it if we need to do
|
|
* something more than just skipping the current line
|
|
* in response to an unmatch for the current line. E.g.
|
|
* inside a post-context window, we will show the current
|
|
* line as a context around the previous hit when it
|
|
* doesn't hit.
|
|
*/
|
|
if (try_lookahead
|
|
&& !(last_hit
|
|
&& (show_function ||
|
|
lno <= last_hit + opt->post_context))
|
|
&& look_ahead(opt, &left, &lno, &bol))
|
|
break;
|
|
eol = end_of_line(bol, &left);
|
|
ch = *eol;
|
|
*eol = 0;
|
|
|
|
if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
|
|
ctx = GREP_CONTEXT_BODY;
|
|
|
|
hit = match_line(opt, bol, eol, ctx, collect_hits);
|
|
*eol = ch;
|
|
|
|
if (collect_hits)
|
|
goto next_line;
|
|
|
|
/* "grep -v -e foo -e bla" should list lines
|
|
* that do not have either, so inversion should
|
|
* be done outside.
|
|
*/
|
|
if (opt->invert)
|
|
hit = !hit;
|
|
if (opt->unmatch_name_only) {
|
|
if (hit)
|
|
return 0;
|
|
goto next_line;
|
|
}
|
|
if (hit) {
|
|
count++;
|
|
if (opt->status_only)
|
|
return 1;
|
|
if (opt->name_only) {
|
|
show_name(opt, gs->name);
|
|
return 1;
|
|
}
|
|
if (opt->count)
|
|
goto next_line;
|
|
if (binary_match_only) {
|
|
opt->output(opt, "Binary file ", 12);
|
|
output_color(opt, gs->name, strlen(gs->name),
|
|
opt->color_filename);
|
|
opt->output(opt, " matches\n", 9);
|
|
return 1;
|
|
}
|
|
/* Hit at this line. If we haven't shown the
|
|
* pre-context lines, we would need to show them.
|
|
*/
|
|
if (opt->pre_context || opt->funcbody)
|
|
show_pre_context(opt, gs, bol, eol, lno);
|
|
else if (opt->funcname)
|
|
show_funcname_line(opt, gs, bol, lno);
|
|
show_line(opt, bol, eol, gs->name, lno, ':');
|
|
last_hit = lno;
|
|
if (opt->funcbody)
|
|
show_function = 1;
|
|
goto next_line;
|
|
}
|
|
if (show_function && (!peek_bol || peek_bol < bol)) {
|
|
unsigned long peek_left = left;
|
|
char *peek_eol = eol;
|
|
|
|
/*
|
|
* Trailing empty lines are not interesting.
|
|
* Peek past them to see if they belong to the
|
|
* body of the current function.
|
|
*/
|
|
peek_bol = bol;
|
|
while (is_empty_line(peek_bol, peek_eol)) {
|
|
peek_bol = peek_eol + 1;
|
|
peek_eol = end_of_line(peek_bol, &peek_left);
|
|
}
|
|
|
|
if (match_funcname(opt, gs, peek_bol, peek_eol))
|
|
show_function = 0;
|
|
}
|
|
if (show_function ||
|
|
(last_hit && lno <= last_hit + opt->post_context)) {
|
|
/* If the last hit is within the post context,
|
|
* we need to show this line.
|
|
*/
|
|
show_line(opt, bol, eol, gs->name, lno, '-');
|
|
}
|
|
|
|
next_line:
|
|
bol = eol + 1;
|
|
if (!left)
|
|
break;
|
|
left--;
|
|
lno++;
|
|
}
|
|
|
|
if (collect_hits)
|
|
return 0;
|
|
|
|
if (opt->status_only)
|
|
return 0;
|
|
if (opt->unmatch_name_only) {
|
|
/* We did not see any hit, so we want to show this */
|
|
show_name(opt, gs->name);
|
|
return 1;
|
|
}
|
|
|
|
xdiff_clear_find_func(&xecfg);
|
|
opt->priv = NULL;
|
|
|
|
/* NEEDSWORK:
|
|
* The real "grep -c foo *.c" gives many "bar.c:0" lines,
|
|
* which feels mostly useless but sometimes useful. Maybe
|
|
* make it another option? For now suppress them.
|
|
*/
|
|
if (opt->count && count) {
|
|
char buf[32];
|
|
if (opt->pathname) {
|
|
output_color(opt, gs->name, strlen(gs->name),
|
|
opt->color_filename);
|
|
output_sep(opt, ':');
|
|
}
|
|
xsnprintf(buf, sizeof(buf), "%u\n", count);
|
|
opt->output(opt, buf, strlen(buf));
|
|
return 1;
|
|
}
|
|
return !!last_hit;
|
|
}
|
|
|
|
static void clr_hit_marker(struct grep_expr *x)
|
|
{
|
|
/* All-hit markers are meaningful only at the very top level
|
|
* OR node.
|
|
*/
|
|
while (1) {
|
|
x->hit = 0;
|
|
if (x->node != GREP_NODE_OR)
|
|
return;
|
|
x->u.binary.left->hit = 0;
|
|
x = x->u.binary.right;
|
|
}
|
|
}
|
|
|
|
static int chk_hit_marker(struct grep_expr *x)
|
|
{
|
|
/* Top level nodes have hit markers. See if they all are hits */
|
|
while (1) {
|
|
if (x->node != GREP_NODE_OR)
|
|
return x->hit;
|
|
if (!x->u.binary.left->hit)
|
|
return 0;
|
|
x = x->u.binary.right;
|
|
}
|
|
}
|
|
|
|
int grep_source(struct grep_opt *opt, struct grep_source *gs)
|
|
{
|
|
/*
|
|
* we do not have to do the two-pass grep when we do not check
|
|
* buffer-wide "all-match".
|
|
*/
|
|
if (!opt->all_match)
|
|
return grep_source_1(opt, gs, 0);
|
|
|
|
/* Otherwise the toplevel "or" terms hit a bit differently.
|
|
* We first clear hit markers from them.
|
|
*/
|
|
clr_hit_marker(opt->pattern_expression);
|
|
grep_source_1(opt, gs, 1);
|
|
|
|
if (!chk_hit_marker(opt->pattern_expression))
|
|
return 0;
|
|
|
|
return grep_source_1(opt, gs, 0);
|
|
}
|
|
|
|
int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
|
|
{
|
|
struct grep_source gs;
|
|
int r;
|
|
|
|
grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL);
|
|
gs.buf = buf;
|
|
gs.size = size;
|
|
|
|
r = grep_source(opt, &gs);
|
|
|
|
grep_source_clear(&gs);
|
|
return r;
|
|
}
|
|
|
|
void grep_source_init(struct grep_source *gs, enum grep_source_type type,
|
|
const char *name, const char *path,
|
|
const void *identifier)
|
|
{
|
|
gs->type = type;
|
|
gs->name = xstrdup_or_null(name);
|
|
gs->path = xstrdup_or_null(path);
|
|
gs->buf = NULL;
|
|
gs->size = 0;
|
|
gs->driver = NULL;
|
|
|
|
switch (type) {
|
|
case GREP_SOURCE_FILE:
|
|
gs->identifier = xstrdup(identifier);
|
|
break;
|
|
case GREP_SOURCE_SUBMODULE:
|
|
if (!identifier) {
|
|
gs->identifier = NULL;
|
|
break;
|
|
}
|
|
/*
|
|
* FALL THROUGH
|
|
* If the identifier is non-NULL (in the submodule case) it
|
|
* will be a SHA1 that needs to be copied.
|
|
*/
|
|
case GREP_SOURCE_OID:
|
|
gs->identifier = oiddup(identifier);
|
|
break;
|
|
case GREP_SOURCE_BUF:
|
|
gs->identifier = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void grep_source_clear(struct grep_source *gs)
|
|
{
|
|
FREE_AND_NULL(gs->name);
|
|
FREE_AND_NULL(gs->path);
|
|
FREE_AND_NULL(gs->identifier);
|
|
grep_source_clear_data(gs);
|
|
}
|
|
|
|
void grep_source_clear_data(struct grep_source *gs)
|
|
{
|
|
switch (gs->type) {
|
|
case GREP_SOURCE_FILE:
|
|
case GREP_SOURCE_OID:
|
|
case GREP_SOURCE_SUBMODULE:
|
|
FREE_AND_NULL(gs->buf);
|
|
gs->size = 0;
|
|
break;
|
|
case GREP_SOURCE_BUF:
|
|
/* leave user-provided buf intact */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int grep_source_load_oid(struct grep_source *gs)
|
|
{
|
|
enum object_type type;
|
|
|
|
grep_read_lock();
|
|
gs->buf = read_sha1_file(gs->identifier, &type, &gs->size);
|
|
grep_read_unlock();
|
|
|
|
if (!gs->buf)
|
|
return error(_("'%s': unable to read %s"),
|
|
gs->name,
|
|
oid_to_hex(gs->identifier));
|
|
return 0;
|
|
}
|
|
|
|
static int grep_source_load_file(struct grep_source *gs)
|
|
{
|
|
const char *filename = gs->identifier;
|
|
struct stat st;
|
|
char *data;
|
|
size_t size;
|
|
int i;
|
|
|
|
if (lstat(filename, &st) < 0) {
|
|
err_ret:
|
|
if (errno != ENOENT)
|
|
error_errno(_("failed to stat '%s'"), filename);
|
|
return -1;
|
|
}
|
|
if (!S_ISREG(st.st_mode))
|
|
return -1;
|
|
size = xsize_t(st.st_size);
|
|
i = open(filename, O_RDONLY);
|
|
if (i < 0)
|
|
goto err_ret;
|
|
data = xmallocz(size);
|
|
if (st.st_size != read_in_full(i, data, size)) {
|
|
error_errno(_("'%s': short read"), filename);
|
|
close(i);
|
|
free(data);
|
|
return -1;
|
|
}
|
|
close(i);
|
|
|
|
gs->buf = data;
|
|
gs->size = size;
|
|
return 0;
|
|
}
|
|
|
|
static int grep_source_load(struct grep_source *gs)
|
|
{
|
|
if (gs->buf)
|
|
return 0;
|
|
|
|
switch (gs->type) {
|
|
case GREP_SOURCE_FILE:
|
|
return grep_source_load_file(gs);
|
|
case GREP_SOURCE_OID:
|
|
return grep_source_load_oid(gs);
|
|
case GREP_SOURCE_BUF:
|
|
return gs->buf ? 0 : -1;
|
|
case GREP_SOURCE_SUBMODULE:
|
|
break;
|
|
}
|
|
die("BUG: invalid grep_source type to load");
|
|
}
|
|
|
|
void grep_source_load_driver(struct grep_source *gs)
|
|
{
|
|
if (gs->driver)
|
|
return;
|
|
|
|
grep_attr_lock();
|
|
if (gs->path)
|
|
gs->driver = userdiff_find_by_path(gs->path);
|
|
if (!gs->driver)
|
|
gs->driver = userdiff_find_by_name("default");
|
|
grep_attr_unlock();
|
|
}
|
|
|
|
static int grep_source_is_binary(struct grep_source *gs)
|
|
{
|
|
grep_source_load_driver(gs);
|
|
if (gs->driver->binary != -1)
|
|
return gs->driver->binary;
|
|
|
|
if (!grep_source_load(gs))
|
|
return buffer_is_binary(gs->buf, gs->size);
|
|
|
|
return 0;
|
|
}
|