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authorChristian Couder <chriscool@tuxfamily.org>2013-12-01 08:49:16 +0100
committerJunio C Hamano <gitster@pobox.com>2013-12-05 14:12:52 -0800
commit956623157f828b2b4fd91a9bc5e78ba8e42437d9 (patch)
treeb081b8ea3eb225110374f985ca322bbb3a078156
parent3fb5aead2971c6181dbf143295c427175b8bf082 (diff)
downloadgit-956623157f828b2b4fd91a9bc5e78ba8e42437d9.tar.gz
git-956623157f828b2b4fd91a9bc5e78ba8e42437d9.tar.xz
strbuf: introduce starts_with() and ends_with()
prefixcmp() and suffixcmp() share the common "cmp" suffix that typically are used to name functions that can be used for ordering, but they can't, because they are not antisymmetric: prefixcmp("foo", "foobar") < 0 prefixcmp("foobar", "foo") == 0 We in fact do not use these functions for ordering. Replace them with functions that just check for equality. Add starts_with() and end_with() that will be used to replace prefixcmp() and suffixcmp(), respectively, as the first step. These are named after corresponding functions/methods in programming languages, like Java, Python and Ruby. In vcs-svn/fast_export.c, there was already an ends_with() function that did the same thing. Let's use the new one instead while at it. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--git-compat-util.h2
-rw-r--r--strbuf.c18
-rw-r--r--vcs-svn/fast_export.c11
3 files changed, 21 insertions, 10 deletions
diff --git a/git-compat-util.h b/git-compat-util.h
index 7776f126d..b73916bbc 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -350,7 +350,9 @@ extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_lis
extern void set_error_routine(void (*routine)(const char *err, va_list params));
extern void set_die_is_recursing_routine(int (*routine)(void));
+extern int starts_with(const char *str, const char *prefix);
extern int prefixcmp(const char *str, const char *prefix);
+extern int ends_with(const char *str, const char *suffix);
extern int suffixcmp(const char *str, const char *suffix);
static inline const char *skip_prefix(const char *str, const char *prefix)
diff --git a/strbuf.c b/strbuf.c
index 1170d01c4..83caf4a91 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -1,6 +1,15 @@
#include "cache.h"
#include "refs.h"
+int starts_with(const char *str, const char *prefix)
+{
+ for (; ; str++, prefix++)
+ if (!*prefix)
+ return 1;
+ else if (*str != *prefix)
+ return 0;
+}
+
int prefixcmp(const char *str, const char *prefix)
{
for (; ; str++, prefix++)
@@ -10,6 +19,15 @@ int prefixcmp(const char *str, const char *prefix)
return (unsigned char)*prefix - (unsigned char)*str;
}
+int ends_with(const char *str, const char *suffix)
+{
+ int len = strlen(str), suflen = strlen(suffix);
+ if (len < suflen)
+ return 0;
+ else
+ return !strcmp(str + len - suflen, suffix);
+}
+
int suffixcmp(const char *str, const char *suffix)
{
int len = strlen(str), suflen = strlen(suffix);
diff --git a/vcs-svn/fast_export.c b/vcs-svn/fast_export.c
index f2b23c81d..bd0f2c2b8 100644
--- a/vcs-svn/fast_export.c
+++ b/vcs-svn/fast_export.c
@@ -162,22 +162,13 @@ static void die_short_read(struct line_buffer *input)
die("invalid dump: unexpected end of file");
}
-static int ends_with(const char *s, size_t len, const char *suffix)
-{
- const size_t suffixlen = strlen(suffix);
- if (len < suffixlen)
- return 0;
- return !memcmp(s + len - suffixlen, suffix, suffixlen);
-}
-
static int parse_cat_response_line(const char *header, off_t *len)
{
- size_t headerlen = strlen(header);
uintmax_t n;
const char *type;
const char *end;
- if (ends_with(header, headerlen, " missing"))
+ if (ends_with(header, " missing"))
return error("cat-blob reports missing blob: %s", header);
type = strstr(header, " blob ");
if (!type)