grep: rip out pessimization to use fixmatch()

diff --git a/diff.c b/diff.c
index b0c7e616a6dc41cc9052cba381ea534a72759211..08bbd3e9070996b38f4d34cedf7640d93aa5808d 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -13,6 +13,7 @@
 #include "utf8.h"
 #include "userdiff.h"
 #include "sigchain.h"
+#include "submodule.h"
 
 #ifdef NO_FAST_WORKING_DIRECTORY
 #define FAST_WORKING_DIRECTORY 0
@@ -38,6 +39,7 @@ static char diff_colors[][COLOR_MAXLEN] = {
        GIT_COLOR_GREEN,        /* NEW */
        GIT_COLOR_YELLOW,       /* COMMIT */
        GIT_COLOR_BG_RED,       /* WHITESPACE */
+       GIT_COLOR_NORMAL,       /* FUNCINFO */
 };
 
 static void diff_filespec_load_driver(struct diff_filespec *one);
@@ -59,7 +61,9 @@ static int parse_diff_color_slot(const char *var, int ofs)
                return DIFF_COMMIT;
        if (!strcasecmp(var+ofs, "whitespace"))
                return DIFF_WHITESPACE;
-       die("bad config variable '%s'", var);
+       if (!strcasecmp(var+ofs, "func"))
+               return DIFF_FUNCINFO;
+       return -1;
 }
 
 static int git_config_rename(const char *var, const char *value)
@@ -118,6 +122,8 @@ int git_diff_basic_config(const char *var, const char *value, void *cb)
 
        if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) {
                int slot = parse_diff_color_slot(var, 11);
+               if (slot < 0)
+                       return 0;
                if (!value)
                        return config_error_nonbool(var);
                color_parse(value, var, diff_colors[slot]);
@@ -294,12 +300,13 @@ static void emit_line_0(FILE *file, const char *set, const char *reset,
                nofirst = 0;
        }
 
-       fputs(set, file);
-
-       if (!nofirst)
-               fputc(first, file);
-       fwrite(line, len, 1, file);
-       fputs(reset, file);
+       if (len || !nofirst) {
+               fputs(set, file);
+               if (!nofirst)
+                       fputc(first, file);
+               fwrite(line, len, 1, file);
+               fputs(reset, file);
+       }
        if (has_trailing_carriage_return)
                fputc('\r', file);
        if (has_trailing_newline)
@@ -343,6 +350,42 @@ static void emit_add_line(const char *reset,
        }
 }
 
+static void emit_hunk_header(struct emit_callback *ecbdata,
+                            const char *line, int len)
+{
+       const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN);
+       const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO);
+       const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO);
+       const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
+       static const char atat[2] = { '@', '@' };
+       const char *cp, *ep;
+
+       /*
+        * As a hunk header must begin with "@@ -<old>, +<new> @@",
+        * it always is at least 10 bytes long.
+        */
+       if (len < 10 ||
+           memcmp(line, atat, 2) ||
+           !(ep = memmem(line + 2, len - 2, atat, 2))) {
+               emit_line(ecbdata->file, plain, reset, line, len);
+               return;
+       }
+       ep += 2; /* skip over @@ */
+
+       /* The hunk header in fraginfo color */
+       emit_line(ecbdata->file, frag, reset, line, ep - line);
+
+       /* blank before the func header */
+       for (cp = ep; ep - line < len; ep++)
+               if (*ep != ' ' && *ep != '\t')
+                       break;
+       if (ep != cp)
+               emit_line(ecbdata->file, plain, reset, cp, ep - cp);
+
+       if (ep < line + len)
+               emit_line(ecbdata->file, func, reset, ep, line + len - ep);
+}
+
 static struct diff_tempfile *claim_diff_tempfile(void) {
        int i;
        for (i = 0; i < ARRAY_SIZE(diff_temp); i++)
@@ -685,14 +728,18 @@ static void diff_words_show(struct diff_words_data *diff_words)
        diff_words->minus.text.size = diff_words->plus.text.size = 0;
 }
 
+/* In "color-words" mode, show word-diff of words accumulated in the buffer */
+static void diff_words_flush(struct emit_callback *ecbdata)
+{
+       if (ecbdata->diff_words->minus.text.size ||
+           ecbdata->diff_words->plus.text.size)
+               diff_words_show(ecbdata->diff_words);
+}
+
 static void free_diff_words_data(struct emit_callback *ecbdata)
 {
        if (ecbdata->diff_words) {
-               /* flush buffers */
-               if (ecbdata->diff_words->minus.text.size ||
-                               ecbdata->diff_words->plus.text.size)
-                       diff_words_show(ecbdata->diff_words);
-
+               diff_words_flush(ecbdata);
                free (ecbdata->diff_words->minus.text.ptr);
                free (ecbdata->diff_words->minus.orig);
                free (ecbdata->diff_words->plus.text.ptr);
@@ -772,11 +819,11 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
        }
 
        if (line[0] == '@') {
+               if (ecbdata->diff_words)
+                       diff_words_flush(ecbdata);
                len = sane_truncate_line(ecbdata, line, len);
                find_lno(line, ecbdata);
-               emit_line(ecbdata->file,
-                         diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO),
-                         reset, line, len);
+               emit_hunk_header(ecbdata, line, len);
                if (line[len-1] != '\n')
                        putc('\n', ecbdata->file);
                return;
@@ -797,9 +844,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
                                          &ecbdata->diff_words->plus);
                        return;
                }
-               if (ecbdata->diff_words->minus.text.size ||
-                   ecbdata->diff_words->plus.text.size)
-                       diff_words_show(ecbdata->diff_words);
+               diff_words_flush(ecbdata);
                line++;
                len--;
                emit_line(ecbdata->file, plain, reset, line, len);
@@ -1557,6 +1602,17 @@ static void builtin_diff(const char *name_a,
        const char *a_prefix, *b_prefix;
        const char *textconv_one = NULL, *textconv_two = NULL;
 
+       if (DIFF_OPT_TST(o, SUBMODULE_LOG) &&
+                       (!one->mode || S_ISGITLINK(one->mode)) &&
+                       (!two->mode || S_ISGITLINK(two->mode))) {
+               const char *del = diff_get_color_opt(o, DIFF_FILE_OLD);
+               const char *add = diff_get_color_opt(o, DIFF_FILE_NEW);
+               show_submodule_summary(o->file, one ? one->path : two->path,
+                               one->sha1, two->sha1,
+                               del, add, reset);
+               return;
+       }
+
        if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) {
                textconv_one = get_textconv(one);
                textconv_two = get_textconv(two);
@@ -2757,6 +2813,12 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
                DIFF_OPT_CLR(options, ALLOW_TEXTCONV);
        else if (!strcmp(arg, "--ignore-submodules"))
                DIFF_OPT_SET(options, IGNORE_SUBMODULES);
+       else if (!strcmp(arg, "--submodule"))
+               DIFF_OPT_SET(options, SUBMODULE_LOG);
+       else if (!prefixcmp(arg, "--submodule=")) {
+               if (!strcmp(arg + 12, "log"))
+                       DIFF_OPT_SET(options, SUBMODULE_LOG);
+       }
 
        /* misc options */
        else if (!strcmp(arg, "-z"))