/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include <git2.h>
#include "common.h"
#include <stdarg.h>
#include <stdio.h>
#include <ctype.h>
#include "posix.h"
#include "fileops.h"
#include "cache.h"
#ifdef _MSC_VER
# include <Shlwapi.h>
#endif
void git_libgit2_version(int *major, int *minor, int *rev)
{
*major = LIBGIT2_VER_MAJOR;
*minor = LIBGIT2_VER_MINOR;
*rev = LIBGIT2_VER_REVISION;
}
int git_libgit2_capabilities()
{
return 0
#ifdef GIT_THREADS
| GIT_CAP_THREADS
#endif
#if defined(GIT_SSL) || defined(GIT_WINHTTP)
| GIT_CAP_HTTPS
#endif
;
}
/* Declarations for tuneable settings */
extern size_t git_mwindow__window_size;
extern size_t git_mwindow__mapped_limit;
static int config_level_to_futils_dir(int config_level)
{
int val = -1;
switch (config_level) {
case GIT_CONFIG_LEVEL_SYSTEM: val = GIT_FUTILS_DIR_SYSTEM; break;
case GIT_CONFIG_LEVEL_XDG: val = GIT_FUTILS_DIR_XDG; break;
case GIT_CONFIG_LEVEL_GLOBAL: val = GIT_FUTILS_DIR_GLOBAL; break;
default:
giterr_set(
GITERR_INVALID, "Invalid config path selector %d", config_level);
}
return val;
}
int git_libgit2_opts(int key, ...)
{
int error = 0;
va_list ap;
va_start(ap, key);
switch (key) {
case GIT_OPT_SET_MWINDOW_SIZE:
git_mwindow__window_size = va_arg(ap, size_t);
break;
case GIT_OPT_GET_MWINDOW_SIZE:
*(va_arg(ap, size_t *)) = git_mwindow__window_size;
break;
case GIT_OPT_SET_MWINDOW_MAPPED_LIMIT:
git_mwindow__mapped_limit = va_arg(ap, size_t);
break;
case GIT_OPT_GET_MWINDOW_MAPPED_LIMIT:
*(va_arg(ap, size_t *)) = git_mwindow__mapped_limit;
break;
case GIT_OPT_GET_SEARCH_PATH:
if ((error = config_level_to_futils_dir(va_arg(ap, int))) >= 0) {
char *out = va_arg(ap, char *);
size_t outlen = va_arg(ap, size_t);
error = git_futils_dirs_get_str(out, outlen, error);
}
break;
case GIT_OPT_SET_SEARCH_PATH:
if ((error = config_level_to_futils_dir(va_arg(ap, int))) >= 0)
error = git_futils_dirs_set(error, va_arg(ap, const char *));
break;
case GIT_OPT_SET_CACHE_OBJECT_LIMIT:
{
git_otype type = (git_otype)va_arg(ap, int);
size_t size = va_arg(ap, size_t);
error = git_cache_set_max_object_size(type, size);
break;
}
case GIT_OPT_SET_CACHE_MAX_SIZE:
git_cache__max_storage = va_arg(ap, ssize_t);
break;
case GIT_OPT_ENABLE_CACHING:
git_cache__enabled = (va_arg(ap, int) != 0);
break;
case GIT_OPT_GET_CACHED_MEMORY:
*(va_arg(ap, ssize_t *)) = git_cache__current_storage.val;
*(va_arg(ap, ssize_t *)) = git_cache__max_storage;
break;
}
va_end(ap);
return error;
}
void git_strarray_free(git_strarray *array)
{
size_t i;
for (i = 0; i < array->count; ++i)
git__free(array->strings[i]);
git__free(array->strings);
memset(array, 0, sizeof(*array));
}
int git_strarray_copy(git_strarray *tgt, const git_strarray *src)
{
size_t i;
assert(tgt && src);
memset(tgt, 0, sizeof(*tgt));
if (!src->count)
return 0;
tgt->strings = git__calloc(src->count, sizeof(char *));
GITERR_CHECK_ALLOC(tgt->strings);
for (i = 0; i < src->count; ++i) {
if (!src->strings[i])
continue;
tgt->strings[tgt->count] = git__strdup(src->strings[i]);
if (!tgt->strings[tgt->count]) {
git_strarray_free(tgt);
memset(tgt, 0, sizeof(*tgt));
return -1;
}
tgt->count++;
}
return 0;
}
int git__strtol64(int64_t *result, const char *nptr, const char **endptr, int base)
{
const char *p;
int64_t n, nn;
int c, ovfl, v, neg, ndig;
p = nptr;
neg = 0;
n = 0;
ndig = 0;
ovfl = 0;
/*
* White space
*/
while (git__isspace(*p))
p++;
/*
* Sign
*/
if (*p == '-' || *p == '+')
if (*p++ == '-')
neg = 1;
/*
* Base
*/
if (base == 0) {
if (*p != '0')
base = 10;
else {
base = 8;
if (p[1] == 'x' || p[1] == 'X') {
p += 2;
base = 16;
}
}
} else if (base == 16 && *p == '0') {
if (p[1] == 'x' || p[1] == 'X')
p += 2;
} else if (base < 0 || 36 < base)
goto Return;
/*
* Non-empty sequence of digits
*/
for (;; p++,ndig++) {
c = *p;
v = base;
if ('0'<=c && c<='9')
v = c - '0';
else if ('a'<=c && c<='z')
v = c - 'a' + 10;
else if ('A'<=c && c<='Z')
v = c - 'A' + 10;
if (v >= base)
break;
nn = n*base + v;
if (nn < n)
ovfl = 1;
n = nn;
}
Return:
if (ndig == 0) {
giterr_set(GITERR_INVALID, "Failed to convert string to long. Not a number");
return -1;
}
if (endptr)
*endptr = p;
if (ovfl) {
giterr_set(GITERR_INVALID, "Failed to convert string to long. Overflow error");
return -1;
}
*result = neg ? -n : n;
return 0;
}
int git__strtol32(int32_t *result, const char *nptr, const char **endptr, int base)
{
int error;
int32_t tmp_int;
int64_t tmp_long;
if ((error = git__strtol64(&tmp_long, nptr, endptr, base)) < 0)
return error;
tmp_int = tmp_long & 0xFFFFFFFF;
if (tmp_int != tmp_long) {
giterr_set(GITERR_INVALID, "Failed to convert. '%s' is too large", nptr);
return -1;
}
*result = tmp_int;
return error;
}
int git__strcmp(const char *a, const char *b)
{
while (*a && *b && *a == *b)
++a, ++b;
return (int)(*(const unsigned char *)a) - (int)(*(const unsigned char *)b);
}
int git__strcasecmp(const char *a, const char *b)
{
while (*a && *b && tolower(*a) == tolower(*b))
++a, ++b;
return (tolower(*a) - tolower(*b));
}
int git__strcasesort_cmp(const char *a, const char *b)
{
int cmp = 0;
while (*a && *b) {
if (*a != *b) {
if (tolower(*a) != tolower(*b))
break;
/* use case in sort order even if not in equivalence */
if (!cmp)
cmp = (int)(*(const uint8_t *)a) - (int)(*(const uint8_t *)b);
}
++a, ++b;
}
if (*a || *b)
return tolower(*a) - tolower(*b);
return cmp;
}
int git__strncmp(const char *a, const char *b, size_t sz)
{
while (sz && *a && *b && *a == *b)
--sz, ++a, ++b;
if (!sz)
return 0;
return (int)(*(const unsigned char *)a) - (int)(*(const unsigned char *)b);
}
int git__strncasecmp(const char *a, const char *b, size_t sz)
{
int al, bl;
do {
al = (unsigned char)tolower(*a);
bl = (unsigned char)tolower(*b);
++a, ++b;
} while (--sz && al && al == bl);
return al - bl;
}
void git__strntolower(char *str, size_t len)
{
size_t i;
for (i = 0; i < len; ++i) {
str[i] = (char) tolower(str[i]);
}
}
void git__strtolower(char *str)
{
git__strntolower(str, strlen(str));
}
int git__prefixcmp(const char *str, const char *prefix)
{
for (;;) {
unsigned char p = *(prefix++), s;
if (!p)
return 0;
if ((s = *(str++)) != p)
return s - p;
}
}
int git__prefixcmp_icase(const char *str, const char *prefix)
{
return strncasecmp(str, prefix, strlen(prefix));
}
int git__suffixcmp(const char *str, const char *suffix)
{
size_t a = strlen(str);
size_t b = strlen(suffix);
if (a < b)
return -1;
return strcmp(str + (a - b), suffix);
}
char *git__strtok(char **end, const char *sep)
{
char *ptr = *end;
while (*ptr && strchr(sep, *ptr))
++ptr;
if (*ptr) {
char *start = ptr;
*end = start + 1;
while (**end && !strchr(sep, **end))
++*end;
if (**end) {
**end = '\0';
++*end;
}
return start;
}
return NULL;
}
/* Similar to strtok, but does not collapse repeated tokens. */
char *git__strsep(char **end, const char *sep)
{
char *start = *end, *ptr = *end;
while (*ptr && !strchr(sep, *ptr))
++ptr;
if (*ptr) {
*end = ptr + 1;
*ptr = '\0';
return start;
}
return NULL;
}
void git__hexdump(const char *buffer, size_t len)
{
static const size_t LINE_WIDTH = 16;
size_t line_count, last_line, i, j;
const char *line;
line_count = (len / LINE_WIDTH);
last_line = (len % LINE_WIDTH);
for (i = 0; i < line_count; ++i) {
line = buffer + (i * LINE_WIDTH);
for (j = 0; j < LINE_WIDTH; ++j, ++line)
printf("%02X ", (unsigned char)*line & 0xFF);
printf("| ");
line = buffer + (i * LINE_WIDTH);
for (j = 0; j < LINE_WIDTH; ++j, ++line)
printf("%c", (*line >= 32 && *line <= 126) ? *line : '.');
printf("\n");
}
if (last_line > 0) {
line = buffer + (line_count * LINE_WIDTH);
for (j = 0; j < last_line; ++j, ++line)
printf("%02X ", (unsigned char)*line & 0xFF);
for (j = 0; j < (LINE_WIDTH - last_line); ++j)
printf(" ");
printf("| ");
line = buffer + (line_count * LINE_WIDTH);
for (j = 0; j < last_line; ++j, ++line)
printf("%c", (*line >= 32 && *line <= 126) ? *line : '.');
printf("\n");
}
printf("\n");
}
#ifdef GIT_LEGACY_HASH
uint32_t git__hash(const void *key, int len, unsigned int seed)
{
const uint32_t m = 0x5bd1e995;
const int r = 24;
uint32_t h = seed ^ len;
const unsigned char *data = (const unsigned char *)key;
while(len >= 4) {
uint32_t k = *(uint32_t *)data;
k *= m;
k ^= k >> r;
k *= m;
h *= m;
h ^= k;
data += 4;
len -= 4;
}
switch(len) {
case 3: h ^= data[2] << 16;
case 2: h ^= data[1] << 8;
case 1: h ^= data[0];
h *= m;
};
h ^= h >> 13;
h *= m;
h ^= h >> 15;
return h;
}
#else
/*
Cross-platform version of Murmurhash3
http://code.google.com/p/smhasher/wiki/MurmurHash3
by Austin Appleby (aappleby@gmail.com)
This code is on the public domain.
*/
uint32_t git__hash(const void *key, int len, uint32_t seed)
{
#define MURMUR_BLOCK() {\
k1 *= c1; \
k1 = git__rotl(k1,11);\
k1 *= c2;\
h1 ^= k1;\
h1 = h1*3 + 0x52dce729;\
c1 = c1*5 + 0x7b7d159c;\
c2 = c2*5 + 0x6bce6396;\
}
const uint8_t *data = (const uint8_t*)key;
const int nblocks = len / 4;
const uint32_t *blocks = (const uint32_t *)(data + nblocks * 4);
const uint8_t *tail = (const uint8_t *)(data + nblocks * 4);
uint32_t h1 = 0x971e137b ^ seed;
uint32_t k1;
uint32_t c1 = 0x95543787;
uint32_t c2 = 0x2ad7eb25;
int i;
for (i = -nblocks; i; i++) {
k1 = blocks[i];
MURMUR_BLOCK();
}
k1 = 0;
switch(len & 3) {
case 3: k1 ^= tail[2] << 16;
case 2: k1 ^= tail[1] << 8;
case 1: k1 ^= tail[0];
MURMUR_BLOCK();
}
h1 ^= len;
h1 ^= h1 >> 16;
h1 *= 0x85ebca6b;
h1 ^= h1 >> 13;
h1 *= 0xc2b2ae35;
h1 ^= h1 >> 16;
return h1;
}
#endif
/**
* A modified `bsearch` from the BSD glibc.
*
* Copyright (c) 1990 Regents of the University of California.
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. [rescinded 22 July 1999]
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
int git__bsearch(
void **array,
size_t array_len,
const void *key,
int (*compare)(const void *, const void *),
size_t *position)
{
size_t lim;
int cmp = -1;
void **part, **base = array;
for (lim = array_len; lim != 0; lim >>= 1) {
part = base + (lim >> 1);
cmp = (*compare)(key, *part);
if (cmp == 0) {
base = part;
break;
}
if (cmp > 0) { /* key > p; take right partition */
base = part + 1;
lim--;
} /* else take left partition */
}
if (position)
*position = (base - array);
return (cmp == 0) ? 0 : GIT_ENOTFOUND;
}
int git__bsearch_r(
void **array,
size_t array_len,
const void *key,
int (*compare_r)(const void *, const void *, void *),
void *payload,
size_t *position)
{
size_t lim;
int cmp = -1;
void **part, **base = array;
for (lim = array_len; lim != 0; lim >>= 1) {
part = base + (lim >> 1);
cmp = (*compare_r)(key, *part, payload);
if (cmp == 0) {
base = part;
break;
}
if (cmp > 0) { /* key > p; take right partition */
base = part + 1;
lim--;
} /* else take left partition */
}
if (position)
*position = (base - array);
return (cmp == 0) ? 0 : GIT_ENOTFOUND;
}
/**
* A strcmp wrapper
*
* We don't want direct pointers to the CRT on Windows, we may
* get stdcall conflicts.
*/
int git__strcmp_cb(const void *a, const void *b)
{
const char *stra = (const char *)a;
const char *strb = (const char *)b;
return strcmp(stra, strb);
}
int git__parse_bool(int *out, const char *value)
{
/* A missing value means true */
if (value == NULL ||
!strcasecmp(value, "true") ||
!strcasecmp(value, "yes") ||
!strcasecmp(value, "on")) {
*out = 1;
return 0;
}
if (!strcasecmp(value, "false") ||
!strcasecmp(value, "no") ||
!strcasecmp(value, "off") ||
value[0] == '\0') {
*out = 0;
return 0;
}
return -1;
}
size_t git__unescape(char *str)
{
char *scan, *pos = str;
for (scan = str; *scan; pos++, scan++) {
if (*scan == '\\' && *(scan + 1) != '\0')
scan++; /* skip '\' but include next char */
if (pos != scan)
*pos = *scan;
}
if (pos != scan) {
*pos = '\0';
}
return (pos - str);
}
#if defined(GIT_WIN32) || defined(BSD)
typedef struct {
git__sort_r_cmp cmp;
void *payload;
} git__qsort_r_glue;
static int GIT_STDLIB_CALL git__qsort_r_glue_cmp(
void *payload, const void *a, const void *b)
{
git__qsort_r_glue *glue = payload;
return glue->cmp(a, b, glue->payload);
}
#endif
void git__qsort_r(
void *els, size_t nel, size_t elsize, git__sort_r_cmp cmp, void *payload)
{
#if defined(__MINGW32__) || defined(__OpenBSD__) || defined(AMIGA) || \
defined(__gnu_hurd__) || \
(__GLIBC__ == 2 && __GLIBC_MINOR__ < 8)
git__insertsort_r(els, nel, elsize, NULL, cmp, payload);
#elif defined(GIT_WIN32)
git__qsort_r_glue glue = { cmp, payload };
qsort_s(els, nel, elsize, git__qsort_r_glue_cmp, &glue);
#elif defined(BSD)
git__qsort_r_glue glue = { cmp, payload };
qsort_r(els, nel, elsize, &glue, git__qsort_r_glue_cmp);
#else
qsort_r(els, nel, elsize, cmp, payload);
#endif
}
void git__insertsort_r(
void *els, size_t nel, size_t elsize, void *swapel,
git__sort_r_cmp cmp, void *payload)
{
uint8_t *base = els;
uint8_t *end = base + nel * elsize;
uint8_t *i, *j;
bool freeswap = !swapel;
if (freeswap)
swapel = git__malloc(elsize);
for (i = base + elsize; i < end; i += elsize)
for (j = i; j > base && cmp(j, j - elsize, payload) < 0; j -= elsize) {
memcpy(swapel, j, elsize);
memcpy(j, j - elsize, elsize);
memcpy(j - elsize, swapel, elsize);
}
if (freeswap)
git__free(swapel);
}
