Merge branch 'ml/maint-grep-doc'

[thirdparty/git.git] / grep.c

diff --git a/grep.c b/grep.c
index 452c2cbae4c4b706c867574c437490cdf7ac9bd5..a0864f1cbbe5fcc6f28eb57a08ebfd9a76c87da6 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -29,17 +29,36 @@ void append_grep_pattern(struct grep_opt *opt, const char *pat,
        p->next = NULL;
 }
 
+struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
+{
+       struct grep_pat *pat;
+       struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
+       *ret = *opt;
+
+       ret->pattern_list = NULL;
+       ret->pattern_tail = &ret->pattern_list;
+
+       for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
+       {
+               if(pat->token == GREP_PATTERN_HEAD)
+                       append_header_grep_pattern(ret, pat->field,
+                                                  pat->pattern);
+               else
+                       append_grep_pattern(ret, pat->pattern, pat->origin,
+                                           pat->no, pat->token);
+       }
+
+       return ret;
+}
+
 static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
 {
        int err;
 
        p->word_regexp = opt->word_regexp;
        p->ignore_case = opt->ignore_case;
+       p->fixed = opt->fixed;
 
-       if (opt->fixed)
-               p->fixed = 1;
-       if (opt->regflags & REG_ICASE)
-               p->fixed = 0;
        if (p->fixed)
                return;
 
@@ -253,7 +272,8 @@ static int word_char(char ch)
 
 static void show_name(struct grep_opt *opt, const char *name)
 {
-       printf("%s%c", name, opt->null_following_name ? '\0' : '\n');
+       opt->output(opt, name, strlen(name));
+       opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
 }
 
 
@@ -490,24 +510,32 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
                      const char *name, unsigned lno, char sign)
 {
        int rest = eol - bol;
+       char sign_str[1];
 
+       sign_str[0] = sign;
        if (opt->pre_context || opt->post_context) {
                if (opt->last_shown == 0) {
                        if (opt->show_hunk_mark)
-                               fputs("--\n", stdout);
+                               opt->output(opt, "--\n", 3);
                        else
                                opt->show_hunk_mark = 1;
                } else if (lno > opt->last_shown + 1)
-                       fputs("--\n", stdout);
+                       opt->output(opt, "--\n", 3);
        }
        opt->last_shown = lno;
 
        if (opt->null_following_name)
-               sign = '\0';
-       if (opt->pathname)
-               printf("%s%c", name, sign);
-       if (opt->linenum)
-               printf("%d%c", lno, sign);
+               sign_str[0] = '\0';
+       if (opt->pathname) {
+               opt->output(opt, name, strlen(name));
+               opt->output(opt, sign_str, 1);
+       }
+       if (opt->linenum) {
+               char buf[32];
+               snprintf(buf, sizeof(buf), "%d", lno);
+               opt->output(opt, buf, strlen(buf));
+               opt->output(opt, sign_str, 1);
+       }
        if (opt->color) {
                regmatch_t match;
                enum grep_context ctx = GREP_CONTEXT_BODY;
@@ -518,18 +546,22 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
                while (next_match(opt, bol, eol, ctx, &match, eflags)) {
                        if (match.rm_so == match.rm_eo)
                                break;
-                       printf("%.*s%s%.*s%s",
-                              (int)match.rm_so, bol,
-                              opt->color_match,
-                              (int)(match.rm_eo - match.rm_so), bol + match.rm_so,
-                              GIT_COLOR_RESET);
+
+                       opt->output(opt, bol, match.rm_so);
+                       opt->output(opt, opt->color_match,
+                                   strlen(opt->color_match));
+                       opt->output(opt, bol + match.rm_so,
+                                   (int)(match.rm_eo - match.rm_so));
+                       opt->output(opt, GIT_COLOR_RESET,
+                                   strlen(GIT_COLOR_RESET));
                        bol += match.rm_eo;
                        rest -= match.rm_eo;
                        eflags = REG_NOTBOL;
                }
                *eol = ch;
        }
-       printf("%.*s\n", rest, bol);
+       opt->output(opt, bol, rest);
+       opt->output(opt, "\n", 1);
 }
 
 static int match_funcname(struct grep_opt *opt, char *bol, char *eol)
@@ -674,6 +706,32 @@ static int look_ahead(struct grep_opt *opt,
        return 0;
 }
 
+int grep_threads_ok(const struct grep_opt *opt)
+{
+       /* If this condition is true, then we may use the attribute
+        * machinery in grep_buffer_1. The attribute code is not
+        * thread safe, so we disable the use of threads.
+        */
+       if (opt->funcname && !opt->unmatch_name_only && !opt->status_only &&
+           !opt->name_only)
+               return 0;
+
+       /* If we are showing hunk marks, we should not do it for the
+        * first match. The synchronization problem we get for this
+        * constraint is not yet solved, so we disable threading in
+        * this case.
+        */
+       if (opt->pre_context || opt->post_context)
+               return 0;
+
+       return 1;
+}
+
+static void std_output(struct grep_opt *opt, const void *buf, size_t size)
+{
+       fwrite(buf, size, 1, stdout);
+}
+
 static int grep_buffer_1(struct grep_opt *opt, const char *name,
                         char *buf, unsigned long size, int collect_hits)
 {
@@ -689,6 +747,9 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name,
 
        opt->last_shown = 0;
 
+       if (!opt->output)
+               opt->output = std_output;
+
        if (buffer_is_binary(buf, size)) {
                switch (opt->binary) {
                case GREP_BINARY_DEFAULT:
@@ -761,7 +822,9 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name,
                        if (opt->status_only)
                                return 1;
                        if (binary_match_only) {
-                               printf("Binary file %s matches\n", name);
+                               opt->output(opt, "Binary file ", 12);
+                               opt->output(opt, name, strlen(name));
+                               opt->output(opt, " matches\n", 9);
                                return 1;
                        }
                        if (opt->name_only) {
@@ -817,9 +880,13 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name,
         * which feels mostly useless but sometimes useful.  Maybe
         * make it another option?  For now suppress them.
         */
-       if (opt->count && count)
-               printf("%s%c%u\n", name,
-                      opt->null_following_name ? '\0' : ':', count);
+       if (opt->count && count) {
+               char buf[32];
+               opt->output(opt, name, strlen(name));
+               snprintf(buf, sizeof(buf), "%c%u\n",
+                        opt->null_following_name ? '\0' : ':', count);
+               opt->output(opt, buf, strlen(buf));
+       }
        return !!last_hit;
 }