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util: add git__fromhex()

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nulltoken 2011-12-28 20:24:58 +01:00
parent 06fcf057b6
commit eb8de7476b
7 changed files with 66 additions and 51 deletions
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28
src/oid.c
View File

@ -11,24 +11,6 @@
#include <string.h>
#include <limits.h>
static signed char from_hex[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 00 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 10 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 20 */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, /* 30 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 40 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 50 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 60 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 70 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 80 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 90 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* a0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* b0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* c0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* d0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* e0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* f0 */
};
static char to_hex[] = "0123456789abcdef";
int git_oid_fromstrn(git_oid *out, const char *str, size_t length)
@ -43,8 +25,8 @@ int git_oid_fromstrn(git_oid *out, const char *str, size_t length)
length = GIT_OID_HEXSZ;
for (p = 0; p < length - 1; p += 2) {
v = (from_hex[(unsigned char)str[p + 0]] << 4)
| from_hex[(unsigned char)str[p + 1]];
v = (git__fromhex(str[p + 0]) << 4)
| git__fromhex(str[p + 1]);
if (v < 0)
return git__throw(GIT_ENOTOID, "Failed to generate sha1. Given string is not a valid sha1 hash");
@ -53,7 +35,7 @@ int git_oid_fromstrn(git_oid *out, const char *str, size_t length)
}
if (length % 2) {
v = (from_hex[(unsigned char)str[p + 0]] << 4);
v = (git__fromhex(str[p + 0]) << 4);
if (v < 0)
return git__throw(GIT_ENOTOID, "Failed to generate sha1. Given string is not a valid sha1 hash");
@ -346,7 +328,7 @@ int git_oid_shorten_add(git_oid_shorten *os, const char *text_oid)
is_leaf = 0;
for (i = 0; i < GIT_OID_HEXSZ; ++i) {
int c = from_hex[(int)text_oid[i]];
int c = git__fromhex(text_oid[i]);
trie_node *node;
if (c == -1)
@ -360,7 +342,7 @@ int git_oid_shorten_add(git_oid_shorten *os, const char *text_oid)
tail = node->tail;
node->tail = NULL;
node = push_leaf(os, idx, from_hex[(int)tail[0]], &tail[1]);
node = push_leaf(os, idx, git__fromhex(tail[0]), &tail[1]);
if (node == NULL)
return GIT_ENOMEM;
}

23
src/util.h
View File

@ -133,5 +133,28 @@ typedef void (*git_refcount_freeptr)(void *r);
#define GIT_REFCOUNT_OWNER(r) (((git_refcount *)(r))->owner)
static signed char from_hex[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 00 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 10 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 20 */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, /* 30 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 40 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 50 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 60 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 70 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 80 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 90 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* a0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* b0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* c0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* d0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* e0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* f0 */
};
GIT_INLINE(int) git__fromhex(char h)
{
return from_hex[(unsigned char) h];
}
#endif /* INCLUDE_util_h__ */

1
tests-clay/clay.h
View File

@ -106,6 +106,7 @@ extern void test_core_filebuf__2(void);
extern void test_core_filebuf__3(void);
extern void test_core_filebuf__4(void);
extern void test_core_filebuf__5(void);
extern void test_core_hex__fromhex(void);
extern void test_core_oid__initialize(void);
extern void test_core_oid__streq(void);
extern void test_core_path__0_dirname(void);

13
tests-clay/clay_main.c
View File

@ -167,6 +167,9 @@ static const struct clay_func _clay_cb_core_filebuf[] = {
{"4", &test_core_filebuf__4},
{"5", &test_core_filebuf__5}
};
static const struct clay_func _clay_cb_core_hex[] = {
{"fromhex", &test_core_hex__fromhex}
};
static const struct clay_func _clay_cb_core_oid[] = {
{"streq", &test_core_oid__streq}
};
@ -361,6 +364,12 @@ static const struct clay_suite _clay_suites[] = {
{NULL, NULL},
{NULL, NULL},
_clay_cb_core_filebuf, 6
},
{
"core::hex",
{NULL, NULL},
{NULL, NULL},
_clay_cb_core_hex, 1
},
{
"core::oid",
@ -538,8 +547,8 @@ static const struct clay_suite _clay_suites[] = {
}
};
static size_t _clay_suite_count = 38;
static size_t _clay_callback_count = 122;
static size_t _clay_suite_count = 39;
static size_t _clay_callback_count = 123;
/* Core test functions */
static void

22
tests-clay/core/hex.c Normal file
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@ -0,0 +1,22 @@
#include "clay_libgit2.h"
#include "util.h"
void test_core_hex__fromhex(void)
{
/* Passing cases */
cl_assert(git__fromhex('0') == 0x0);
cl_assert(git__fromhex('1') == 0x1);
cl_assert(git__fromhex('3') == 0x3);
cl_assert(git__fromhex('9') == 0x9);
cl_assert(git__fromhex('A') == 0xa);
cl_assert(git__fromhex('C') == 0xc);
cl_assert(git__fromhex('F') == 0xf);
cl_assert(git__fromhex('a') == 0xa);
cl_assert(git__fromhex('c') == 0xc);
cl_assert(git__fromhex('f') == 0xf);
/* Failing cases */
cl_assert(git__fromhex('g') == -1);
cl_assert(git__fromhex('z') == -1);
cl_assert(git__fromhex('X') == -1);
}

15
tests-clay/object/raw/chars.c
View File

@ -3,17 +3,6 @@
#include "odb.h"
static int from_hex(unsigned int i)
{
if (i >= '0' && i <= '9')
return i - '0';
if (i >= 'a' && i <= 'f')
return 10 + (i - 'a');
if (i >= 'A' && i <= 'F')
return 10 + (i - 'A');
return -1;
}
void test_object_raw_chars__find_invalid_chars_in_oid(void)
{
git_oid out;
@ -28,8 +17,8 @@ void test_object_raw_chars__find_invalid_chars_in_oid(void)
for (i = 0; i < 256; i++) {
in[38] = (char)i;
if (from_hex(i) >= 0) {
exp[19] = (unsigned char)(from_hex(i) << 4);
if (git__fromhex(i) >= 0) {
exp[19] = (unsigned char)(git__fromhex(i) << 4);
cl_git_pass(git_oid_fromstr(&out, in));
cl_assert(memcmp(out.id, exp, sizeof(out.id)) == 0);
} else {

15
tests/t01-rawobj.c
View File

@ -52,17 +52,6 @@ BEGIN_TEST(oid2, "fail when parsing an invalid string as oid")
must_fail(git_oid_fromstr(&out, "moo"));
END_TEST
static int from_hex(unsigned int i)
{
if (i >= '0' && i <= '9')
return i - '0';
if (i >= 'a' && i <= 'f')
return 10 + (i - 'a');
if (i >= 'A' && i <= 'F')
return 10 + (i - 'A');
return -1;
}
BEGIN_TEST(oid3, "find all invalid characters when parsing an oid")
git_oid out;
unsigned char exp[] = {
@ -77,8 +66,8 @@ BEGIN_TEST(oid3, "find all invalid characters when parsing an oid")
for (i = 0; i < 256; i++) {
in[38] = (char)i;
if (from_hex(i) >= 0) {
exp[19] = (unsigned char)(from_hex(i) << 4);
if (git__fromhex(i) >= 0) {
exp[19] = (unsigned char)(git__fromhex(i) << 4);
must_pass(git_oid_fromstr(&out, in));
must_be_true(memcmp(out.id, exp, sizeof(out.id)) == 0);
} else {