Make builtin-rerere use of strbuf nicer and more efficient.

diff --git a/builtin-for-each-ref.c b/builtin-for-each-ref.c
index b11ca928d6ac353de888f0e80d24578c5803d769..e868a4b6d7f2fe59437ccab12ea7a9b16f4a2163 100644 (file)
--- a/builtin-for-each-ref.c
+++ b/builtin-for-each-ref.c
@@ -1,3 +1,4 @@
+#include "builtin.h"
 #include "cache.h"
 #include "refs.h"
 #include "object.h"
@@ -86,7 +87,6 @@ static int used_atom_cnt, sort_atom_limit, need_tagged;
 static int parse_atom(const char *atom, const char *ep)
 {
        const char *sp;
-       char *n;
        int i, at;
 
        sp = atom;
@@ -119,10 +119,7 @@ static int parse_atom(const char *atom, const char *ep)
                             (sizeof *used_atom) * used_atom_cnt);
        used_atom_type = xrealloc(used_atom_type,
                                  (sizeof(*used_atom_type) * used_atom_cnt));
-       n = xmalloc(ep - atom + 1);
-       memcpy(n, atom, ep - atom);
-       n[ep-atom] = 0;
-       used_atom[at] = n;
+       used_atom[at] = xmemdupz(atom, ep - atom);
        used_atom_type[at] = valid_atom[i].cmp_type;
        return at;
 }
@@ -301,49 +298,31 @@ static const char *find_wholine(const char *who, int wholen, const char *buf, un
        return "";
 }
 
-static char *copy_line(const char *buf)
+static const char *copy_line(const char *buf)
 {
        const char *eol = strchr(buf, '\n');
-       char *line;
-       int len;
        if (!eol)
                return "";
-       len = eol - buf;
-       line = xmalloc(len + 1);
-       memcpy(line, buf, len);
-       line[len] = 0;
-       return line;
+       return xmemdupz(buf, eol - buf);
 }
 
-static char *copy_name(const char *buf)
+static const char *copy_name(const char *buf)
 {
-       const char *eol = strchr(buf, '\n');
-       const char *eoname = strstr(buf, " <");
-       char *line;
-       int len;
-       if (!(eoname && eol && eoname < eol))
-               return "";
-       len = eoname - buf;
-       line = xmalloc(len + 1);
-       memcpy(line, buf, len);
-       line[len] = 0;
-       return line;
+       const char *cp;
+       for (cp = buf; *cp && *cp != '\n'; cp++) {
+               if (!strncmp(cp, " <", 2))
+                       return xmemdupz(buf, cp - buf);
+       }
+       return "";
 }
 
-static char *copy_email(const char *buf)
+static const char *copy_email(const char *buf)
 {
        const char *email = strchr(buf, '<');
        const char *eoemail = strchr(email, '>');
-       char *line;
-       int len;
        if (!email || !eoemail)
                return "";
-       eoemail++;
-       len = eoemail - email;
-       line = xmalloc(len + 1);
-       memcpy(line, email, len);
-       line[len] = 0;
-       return line;
+       return xmemdupz(email, eoemail + 1 - email);
 }
 
 static void grab_date(const char *buf, struct atom_value *v)
@@ -796,7 +775,7 @@ static struct ref_sort *default_sort(void)
        return sort;
 }
 
-int cmd_for_each_ref(int ac, const char **av, char *prefix)
+int cmd_for_each_ref(int ac, const char **av, const char *prefix)
 {
        int i, num_refs;
        const char *format = NULL;