]> asedeno.scripts.mit.edu Git - git.git/blobdiff - grep.c
Merge branch 'jn/gitweb-return-or-exit-cleanup'
[git.git] / grep.c
diff --git a/grep.c b/grep.c
index a0864f1cbbe5fcc6f28eb57a08ebfd9a76c87da6..82fb349be6f6ef8211d4828101cd8e88bcbb304f 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -7,20 +7,28 @@ void append_header_grep_pattern(struct grep_opt *opt, enum grep_header_field fie
 {
        struct grep_pat *p = xcalloc(1, sizeof(*p));
        p->pattern = pat;
+       p->patternlen = strlen(pat);
        p->origin = "header";
        p->no = 0;
        p->token = GREP_PATTERN_HEAD;
        p->field = field;
-       *opt->pattern_tail = p;
-       opt->pattern_tail = &p->next;
+       *opt->header_tail = p;
+       opt->header_tail = &p->next;
        p->next = NULL;
 }
 
 void append_grep_pattern(struct grep_opt *opt, const char *pat,
                         const char *origin, int no, enum grep_pat_token t)
+{
+       append_grep_pat(opt, pat, strlen(pat), origin, no, t);
+}
+
+void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
+                    const char *origin, int no, enum grep_pat_token t)
 {
        struct grep_pat *p = xcalloc(1, sizeof(*p));
        p->pattern = pat;
+       p->patternlen = patlen;
        p->origin = origin;
        p->no = no;
        p->token = t;
@@ -44,8 +52,8 @@ struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
                        append_header_grep_pattern(ret, pat->field,
                                                   pat->pattern);
                else
-                       append_grep_pattern(ret, pat->pattern, pat->origin,
-                                           pat->no, pat->token);
+                       append_grep_pat(ret, pat->pattern, pat->patternlen,
+                                       pat->origin, pat->no, pat->token);
        }
 
        return ret;
@@ -184,9 +192,26 @@ static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
 void compile_grep_patterns(struct grep_opt *opt)
 {
        struct grep_pat *p;
-
-       if (opt->all_match)
-               opt->extended = 1;
+       struct grep_expr *header_expr = NULL;
+
+       if (opt->header_list) {
+               p = opt->header_list;
+               header_expr = compile_pattern_expr(&p);
+               if (p)
+                       die("incomplete pattern expression: %s", p->pattern);
+               for (p = opt->header_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;
+                       }
+               }
+       }
 
        for (p = opt->pattern_list; p; p = p->next) {
                switch (p->token) {
@@ -201,7 +226,9 @@ void compile_grep_patterns(struct grep_opt *opt)
                }
        }
 
-       if (!opt->extended)
+       if (opt->all_match || header_expr)
+               opt->extended = 1;
+       else if (!opt->extended)
                return;
 
        /* Then bundle them up in an expression.
@@ -212,6 +239,21 @@ void compile_grep_patterns(struct grep_opt *opt)
                opt->pattern_expression = compile_pattern_expr(&p);
        if (p)
                die("incomplete pattern expression: %s", p->pattern);
+
+       if (!header_expr)
+               return;
+
+       if (opt->pattern_expression) {
+               struct grep_expr *z;
+               z = xcalloc(1, sizeof(*z));
+               z->node = GREP_NODE_OR;
+               z->u.binary.left = opt->pattern_expression;
+               z->u.binary.right = header_expr;
+               opt->pattern_expression = z;
+       } else {
+               opt->pattern_expression = header_expr;
+       }
+       opt->all_match = 1;
 }
 
 static void free_pattern_expr(struct grep_expr *x)
@@ -270,20 +312,46 @@ 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 (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)
 {
-       opt->output(opt, name, strlen(name));
+       output_color(opt, name, strlen(name), opt->color_filename);
        opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
 }
 
-
-static int fixmatch(const char *pattern, char *line, int ignore_case, regmatch_t *match)
+static int fixmatch(struct grep_pat *p, char *line, char *eol,
+                   regmatch_t *match)
 {
        char *hit;
-       if (ignore_case)
-               hit = strcasestr(line, pattern);
-       else
-               hit = strstr(line, pattern);
+
+       if (p->ignore_case) {
+               char *s = line;
+               do {
+                       hit = strcasestr(s, p->pattern);
+                       if (hit)
+                               break;
+                       s += strlen(s) + 1;
+               } while (s < eol);
+       } else
+               hit = memmem(line, eol - line, p->pattern, p->patternlen);
 
        if (!hit) {
                match->rm_so = match->rm_eo = -1;
@@ -291,11 +359,22 @@ static int fixmatch(const char *pattern, char *line, int ignore_case, regmatch_t
        }
        else {
                match->rm_so = hit - line;
-               match->rm_eo = match->rm_so + strlen(pattern);
+               match->rm_eo = match->rm_so + p->patternlen;
                return 0;
        }
 }
 
+static int regmatch(const regex_t *preg, char *line, char *eol,
+                   regmatch_t *match, int eflags)
+{
+#ifdef REG_STARTEND
+       match->rm_so = 0;
+       match->rm_eo = eol - line;
+       eflags |= REG_STARTEND;
+#endif
+       return regexec(preg, line, 1, match, eflags);
+}
+
 static int strip_timestamp(char *bol, char **eol_p)
 {
        char *eol = *eol_p;
@@ -346,9 +425,9 @@ static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
 
  again:
        if (p->fixed)
-               hit = !fixmatch(p->pattern, bol, p->ignore_case, pmatch);
+               hit = !fixmatch(p, bol, eol, pmatch);
        else
-               hit = !regexec(&p->regexp, bol, 1, pmatch, eflags);
+               hit = !regmatch(&p->regexp, bol, eol, pmatch, eflags);
 
        if (hit && p->word_regexp) {
                if ((pmatch[0].rm_so < 0) ||
@@ -510,31 +589,30 @@ 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];
+       char *line_color = NULL;
 
-       sign_str[0] = sign;
        if (opt->pre_context || opt->post_context) {
                if (opt->last_shown == 0) {
-                       if (opt->show_hunk_mark)
-                               opt->output(opt, "--\n", 3);
-                       else
-                               opt->show_hunk_mark = 1;
-               } else if (lno > opt->last_shown + 1)
-                       opt->output(opt, "--\n", 3);
+                       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);
+               }
        }
        opt->last_shown = lno;
 
-       if (opt->null_following_name)
-               sign_str[0] = '\0';
        if (opt->pathname) {
-               opt->output(opt, name, strlen(name));
-               opt->output(opt, sign_str, 1);
+               output_color(opt, name, strlen(name), opt->color_filename);
+               output_sep(opt, sign);
        }
        if (opt->linenum) {
                char buf[32];
                snprintf(buf, sizeof(buf), "%d", lno);
-               opt->output(opt, buf, strlen(buf));
-               opt->output(opt, sign_str, 1);
+               output_color(opt, buf, strlen(buf), opt->color_lineno);
+               output_sep(opt, sign);
        }
        if (opt->color) {
                regmatch_t match;
@@ -542,25 +620,28 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
                int ch = *eol;
                int eflags = 0;
 
+               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;
 
-                       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));
+                       output_color(opt, bol, match.rm_so, line_color);
+                       output_color(opt, bol + match.rm_so,
+                                    match.rm_eo - match.rm_so,
+                                    opt->color_match);
                        bol += match.rm_eo;
                        rest -= match.rm_eo;
                        eflags = REG_NOTBOL;
                }
                *eol = ch;
        }
-       opt->output(opt, bol, rest);
+       output_color(opt, bol, rest, line_color);
        opt->output(opt, "\n", 1);
 }
 
@@ -671,16 +752,9 @@ static int look_ahead(struct grep_opt *opt,
                regmatch_t m;
 
                if (p->fixed)
-                       hit = !fixmatch(p->pattern, bol, p->ignore_case, &m);
-               else {
-#ifdef REG_STARTEND
-                       m.rm_so = 0;
-                       m.rm_eo = *left_p;
-                       hit = !regexec(&p->regexp, bol, 1, &m, REG_STARTEND);
-#else
-                       hit = !regexec(&p->regexp, bol, 1, &m, 0);
-#endif
-               }
+                       hit = !fixmatch(p, bol, bol + *left_p, &m);
+               else
+                       hit = !regmatch(&p->regexp, bol, bol + *left_p, &m, 0);
                if (!hit || m.rm_so < 0 || m.rm_eo < 0)
                        continue;
                if (earliest < 0 || m.rm_so < earliest)
@@ -716,14 +790,6 @@ int grep_threads_ok(const struct grep_opt *opt)
            !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;
 }
 
@@ -745,22 +811,27 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name,
        enum grep_context ctx = GREP_CONTEXT_HEAD;
        xdemitconf_t xecfg;
 
-       opt->last_shown = 0;
-
        if (!opt->output)
                opt->output = std_output;
 
-       if (buffer_is_binary(buf, size)) {
-               switch (opt->binary) {
-               case GREP_BINARY_DEFAULT:
+       if (opt->last_shown && (opt->pre_context || opt->post_context) &&
+           opt->output == std_output)
+               opt->show_hunk_mark = 1;
+       opt->last_shown = 0;
+
+       switch (opt->binary) {
+       case GREP_BINARY_DEFAULT:
+               if (buffer_is_binary(buf, size))
                        binary_match_only = 1;
-                       break;
-               case GREP_BINARY_NOMATCH:
+               break;
+       case GREP_BINARY_NOMATCH:
+               if (buffer_is_binary(buf, size))
                        return 0; /* Assume unmatch */
-                       break;
-               default:
-                       break;
-               }
+               break;
+       case GREP_BINARY_TEXT:
+               break;
+       default:
+               die("bug: unknown binary handling mode");
        }
 
        memset(&xecfg, 0, sizeof(xecfg));
@@ -821,28 +892,27 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name,
                        count++;
                        if (opt->status_only)
                                return 1;
+                       if (opt->name_only) {
+                               show_name(opt, name);
+                               return 1;
+                       }
+                       if (opt->count)
+                               goto next_line;
                        if (binary_match_only) {
                                opt->output(opt, "Binary file ", 12);
-                               opt->output(opt, name, strlen(name));
+                               output_color(opt, name, strlen(name),
+                                            opt->color_filename);
                                opt->output(opt, " matches\n", 9);
                                return 1;
                        }
-                       if (opt->name_only) {
-                               show_name(opt, name);
-                               return 1;
-                       }
                        /* Hit at this line.  If we haven't shown the
                         * pre-context lines, we would need to show them.
-                        * When asked to do "count", this still show
-                        * the context which is nonsense, but the user
-                        * deserves to get that ;-).
                         */
                        if (opt->pre_context)
                                show_pre_context(opt, name, buf, bol, lno);
                        else if (opt->funcname)
                                show_funcname_line(opt, name, buf, bol, lno);
-                       if (!opt->count)
-                               show_line(opt, bol, eol, name, lno, ':');
+                       show_line(opt, bol, eol, name, lno, ':');
                        last_hit = lno;
                }
                else if (last_hit &&
@@ -882,10 +952,11 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name,
         */
        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);
+               output_color(opt, name, strlen(name), opt->color_filename);
+               output_sep(opt, ':');
+               snprintf(buf, sizeof(buf), "%u\n", count);
                opt->output(opt, buf, strlen(buf));
+               return 1;
        }
        return !!last_hit;
 }