gitweb: Simplify snapshot format detection logic in evaluate_path_info

diff --git a/strbuf.c b/strbuf.c
index bdf49544d47b97475800b104ed9efe8f846db265..a88496030b7053a543173c299bd9f54b923db2ec 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "refs.h"
 
 int prefixcmp(const char *str, const char *prefix)
 {
@@ -139,14 +140,11 @@ void strbuf_list_free(struct strbuf **sbs)
 
 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
 {
-       int cmp;
-       if (a->len < b->len) {
-               cmp = memcmp(a->buf, b->buf, a->len);
-               return cmp ? cmp : -1;
-       } else {
-               cmp = memcmp(a->buf, b->buf, b->len);
-               return cmp ? cmp : a->len != b->len;
-       }
+       int len = a->len < b->len ? a->len: b->len;
+       int cmp = memcmp(a->buf, b->buf, len);
+       if (cmp)
+               return cmp;
+       return a->len < b->len ? -1: a->len != b->len;
 }
 
 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
@@ -256,18 +254,21 @@ size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
 {
        size_t res;
+       size_t oldalloc = sb->alloc;
 
        strbuf_grow(sb, size);
        res = fread(sb->buf + sb->len, 1, size, f);
-       if (res > 0) {
+       if (res > 0)
                strbuf_setlen(sb, sb->len + res);
-       }
+       else if (res < 0 && oldalloc == 0)
+               strbuf_release(sb);
        return res;
 }
 
 ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
 {
        size_t oldlen = sb->len;
+       size_t oldalloc = sb->alloc;
 
        strbuf_grow(sb, hint ? hint : 8192);
        for (;;) {
@@ -275,7 +276,10 @@ ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
 
                cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
                if (cnt < 0) {
-                       strbuf_setlen(sb, oldlen);
+                       if (oldalloc == 0)
+                               strbuf_release(sb);
+                       else
+                               strbuf_setlen(sb, oldlen);
                        return -1;
                }
                if (!cnt)
@@ -292,6 +296,8 @@ ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
 
 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
 {
+       size_t oldalloc = sb->alloc;
+
        if (hint < 32)
                hint = 32;
 
@@ -311,7 +317,8 @@ int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
                /* .. the buffer was too small - try again */
                hint *= 2;
        }
-       strbuf_release(sb);
+       if (oldalloc == 0)
+               strbuf_release(sb);
        return -1;
 }
 
@@ -351,3 +358,19 @@ int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
 
        return len;
 }
+
+int strbuf_branchname(struct strbuf *sb, const char *name)
+{
+       int len = strlen(name);
+       if (interpret_branch_name(name, sb) == len)
+               return 0;
+       strbuf_add(sb, name, len);
+       return len;
+}
+
+int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
+{
+       strbuf_branchname(sb, name);
+       strbuf_splice(sb, 0, 0, "refs/heads/", 11);
+       return check_ref_format(sb->buf);
+}