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owntone-server/src/misc.c

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/*
* Copyright (C) 2009-2010 Julien BLACHE <jb@jblache.org>
*
* Some code included below is in the public domain, check comments
* in the file.
*
* Pieces of code adapted from mt-daapd:
* Copyright (C) 2003-2007 Ron Pedde (ron@pedde.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <limits.h>
#include <sys/param.h>
#include <unistr.h>
#include <uniconv.h>
#include "logger.h"
#include "misc.h"
int
safe_atoi32(const char *str, int32_t *val)
{
char *end;
long intval;
errno = 0;
intval = strtol(str, &end, 10);
if (((errno == ERANGE) && ((intval == LONG_MAX) || (intval == LONG_MIN)))
|| ((errno != 0) && (intval == 0)))
{
DPRINTF(E_DBG, L_MISC, "Invalid integer in string (%s): %s\n", str, strerror(errno));
return -1;
}
if (end == str)
{
DPRINTF(E_DBG, L_MISC, "No integer found in string (%s)\n", str);
return -1;
}
if (intval > INT32_MAX)
{
DPRINTF(E_DBG, L_MISC, "Integer value too large (%s)\n", str);
return -1;
}
*val = (int32_t)intval;
return 0;
}
int
safe_atou32(const char *str, uint32_t *val)
{
char *end;
unsigned long intval;
errno = 0;
intval = strtoul(str, &end, 10);
if (((errno == ERANGE) && (intval == ULONG_MAX))
|| ((errno != 0) && (intval == 0)))
{
DPRINTF(E_DBG, L_MISC, "Invalid integer in string (%s): %s\n", str, strerror(errno));
return -1;
}
if (end == str)
{
DPRINTF(E_DBG, L_MISC, "No integer found in string (%s)\n", str);
return -1;
}
if (intval > UINT32_MAX)
{
DPRINTF(E_DBG, L_MISC, "Integer value too large (%s)\n", str);
return -1;
}
*val = (uint32_t)intval;
return 0;
}
int
safe_hextou32(const char *str, uint32_t *val)
{
char *end;
unsigned long intval;
errno = 0;
intval = strtoul(str, &end, 16);
if (((errno == ERANGE) && (intval == ULONG_MAX))
|| ((errno != 0) && (intval == 0)))
{
DPRINTF(E_DBG, L_MISC, "Invalid integer in string (%s): %s\n", str, strerror(errno));
return -1;
}
if (end == str)
{
DPRINTF(E_DBG, L_MISC, "No integer found in string (%s)\n", str);
return -1;
}
if (intval > UINT32_MAX)
{
DPRINTF(E_DBG, L_MISC, "Integer value too large (%s)\n", str);
return -1;
}
*val = (uint32_t)intval;
return 0;
}
int
safe_atoi64(const char *str, int64_t *val)
{
char *end;
long long intval;
errno = 0;
intval = strtoll(str, &end, 10);
if (((errno == ERANGE) && ((intval == LLONG_MAX) || (intval == LLONG_MIN)))
|| ((errno != 0) && (intval == 0)))
{
DPRINTF(E_DBG, L_MISC, "Invalid integer in string (%s): %s\n", str, strerror(errno));
return -1;
}
if (end == str)
{
DPRINTF(E_DBG, L_MISC, "No integer found in string (%s)\n", str);
return -1;
}
if (intval > INT64_MAX)
{
DPRINTF(E_DBG, L_MISC, "Integer value too large (%s)\n", str);
return -1;
}
*val = (int64_t)intval;
return 0;
}
int
safe_atou64(const char *str, uint64_t *val)
{
char *end;
unsigned long long intval;
errno = 0;
intval = strtoull(str, &end, 10);
if (((errno == ERANGE) && (intval == ULLONG_MAX))
|| ((errno != 0) && (intval == 0)))
{
DPRINTF(E_DBG, L_MISC, "Invalid integer in string (%s): %s\n", str, strerror(errno));
return -1;
}
if (end == str)
{
DPRINTF(E_DBG, L_MISC, "No integer found in string (%s)\n", str);
return -1;
}
if (intval > UINT64_MAX)
{
DPRINTF(E_DBG, L_MISC, "Integer value too large (%s)\n", str);
return -1;
}
*val = (uint64_t)intval;
return 0;
}
int
safe_hextou64(const char *str, uint64_t *val)
{
char *end;
unsigned long long intval;
errno = 0;
intval = strtoull(str, &end, 16);
if (((errno == ERANGE) && (intval == ULLONG_MAX))
|| ((errno != 0) && (intval == 0)))
{
DPRINTF(E_DBG, L_MISC, "Invalid integer in string (%s): %s\n", str, strerror(errno));
return -1;
}
if (end == str)
{
DPRINTF(E_DBG, L_MISC, "No integer found in string (%s)\n", str);
return -1;
}
if (intval > UINT64_MAX)
{
DPRINTF(E_DBG, L_MISC, "Integer value too large (%s)\n", str);
return -1;
}
*val = (uint64_t)intval;
return 0;
}
/* Key/value functions */
int
keyval_add_size(struct keyval *kv, const char *name, const char *value, size_t size)
{
struct onekeyval *okv;
const char *val;
/* Check for duplicate key names */
val = keyval_get(kv, name);
if (val)
{
/* Same value, fine */
if (strcmp(val, value) == 0)
return 0;
else /* Different value, bad */
return -1;
}
okv = (struct onekeyval *)malloc(sizeof(struct onekeyval));
if (!okv)
{
DPRINTF(E_LOG, L_MISC, "Out of memory for new keyval\n");
return -1;
}
okv->name = strdup(name);
if (!okv->name)
{
DPRINTF(E_LOG, L_MISC, "Out of memory for new keyval name\n");
free(okv);
return -1;
}
okv->value = (char *)malloc(size + 1);
if (!okv->value)
{
DPRINTF(E_LOG, L_MISC, "Out of memory for new keyval value\n");
free(okv->name);
free(okv);
return -1;
}
memcpy(okv->value, value, size);
okv->value[size] = '\0';
okv->next = NULL;
if (!kv->head)
kv->head = okv;
if (kv->tail)
kv->tail->next = okv;
kv->tail = okv;
return 0;
}
int
keyval_add(struct keyval *kv, const char *name, const char *value)
{
return keyval_add_size(kv, name, value, strlen(value));
}
void
keyval_remove(struct keyval *kv, const char *name)
{
struct onekeyval *okv;
struct onekeyval *pokv;
for (pokv = NULL, okv = kv->head; okv; pokv = okv, okv = okv->next)
{
if (strcasecmp(okv->name, name) == 0)
break;
}
if (!okv)
return;
if (okv == kv->head)
kv->head = okv->next;
if (okv == kv->tail)
kv->tail = pokv;
if (pokv)
pokv->next = okv->next;
free(okv->name);
free(okv->value);
free(okv);
}
const char *
keyval_get(struct keyval *kv, const char *name)
{
struct onekeyval *okv;
for (okv = kv->head; okv; okv = okv->next)
{
if (strcasecmp(okv->name, name) == 0)
return okv->value;
}
return NULL;
}
void
keyval_clear(struct keyval *kv)
{
struct onekeyval *hokv;
struct onekeyval *okv;
hokv = kv->head;
for (okv = hokv; hokv; okv = hokv)
{
hokv = okv->next;
free(okv->name);
free(okv->value);
free(okv);
}
kv->head = NULL;
kv->tail = NULL;
}
char *
m_realpath(const char *pathname)
{
char buf[PATH_MAX];
char *ret;
ret = realpath(pathname, buf);
if (!ret)
return NULL;
ret = strdup(buf);
if (!ret)
{
DPRINTF(E_LOG, L_MISC, "Out of memory for realpath\n");
return NULL;
}
return ret;
}
char *
unicode_fixup_string(char *str)
{
uint8_t *ret;
size_t len;
if (!str)
return NULL;
len = strlen(str);
/* String is valid UTF-8 */
if (!u8_check((uint8_t *)str, len))
{
if (len >= 3)
{
/* Check for and strip byte-order mark */
if (memcmp("\xef\xbb\xbf", str, 3) == 0)
memmove(str, str + 3, len - 3 + 1);
}
return str;
}
ret = u8_conv_from_encoding("ascii", iconveh_question_mark, str, len, NULL, NULL, &len);
if (!ret)
{
DPRINTF(E_LOG, L_MISC, "Could not convert string '%s' to UTF-8: %s\n", str, strerror(errno));
return NULL;
}
return (char *)ret;
}
uint32_t
djb_hash(void *data, size_t len)
{
unsigned char *bytes = data;
uint32_t hash = 5381;
while (len--)
{
hash = ((hash << 5) + hash) + *bytes;
bytes++;
}
return hash;
}
static unsigned char b64_decode_table[256];
char *
b64_decode(const char *b64)
{
char *str;
const unsigned char *iptr;
unsigned char *optr;
unsigned char c;
int len;
int i;
if (b64_decode_table[0] == 0)
{
memset(b64_decode_table, 0xff, sizeof(b64_decode_table));
/* Base64 encoding: A-Za-z0-9+/ */
for (i = 0; i < 26; i++)
{
b64_decode_table['A' + i] = i;
b64_decode_table['a' + i] = i + 26;
}
for (i = 0; i < 10; i++)
b64_decode_table['0' + i] = i + 52;
b64_decode_table['+'] = 62;
b64_decode_table['/'] = 63;
/* Stop on '=' */
b64_decode_table['='] = 100; /* > 63 */
}
len = strlen(b64);
str = (char *)malloc(len);
if (!str)
return NULL;
memset(str, 0, len);
iptr = (const unsigned char *)b64;
optr = (unsigned char *)str;
i = 0;
while (len)
{
if (*iptr == '=')
break;
c = b64_decode_table[*iptr];
if (c > 63)
{
iptr++;
len--;
continue;
}
switch (i)
{
case 0:
optr[0] = c << 2;
break;
case 1:
optr[0] |= c >> 4;
optr[1] = c << 4;
break;
case 2:
optr[1] |= c >> 2;
optr[2] = c << 6;
break;
case 3:
optr[2] |= c;
break;
}
i++;
if (i == 4)
{
optr += 3;
i = 0;
}
len--;
iptr++;
}
return str;
}
static const char b64_encode_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static void
b64_encode_block(uint8_t *in, char *out, int len)
{
out[0] = b64_encode_table[in[0] >> 2];
out[2] = out[3] = '=';
if (len == 1)
out[1] = b64_encode_table[((in[0] & 0x03) << 4)];
else
{
out[1] = b64_encode_table[((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4)];
if (len == 2)
out[2] = b64_encode_table[((in[1] & 0x0f) << 2)];
else
{
out[2] = b64_encode_table[((in[1] & 0x0f) << 2) | ((in[2] & 0xc0) >> 6)];
out[3] = b64_encode_table[in[2] & 0x3f];
}
}
}
static void
b64_encode_full_block(uint8_t *in, char *out)
{
out[0] = b64_encode_table[in[0] >> 2];
out[1] = b64_encode_table[((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4)];
out[2] = b64_encode_table[((in[1] & 0x0f) << 2) | ((in[2] & 0xc0) >> 6)];
out[3] = b64_encode_table[in[2] & 0x3f];
}
char *
b64_encode(uint8_t *in, size_t len)
{
char *encoded;
char *out;
/* 3 in chars -> 4 out chars */
encoded = (char *)malloc(len + (len / 3) + 4 + 1);
if (!encoded)
return NULL;
out = encoded;
while (len >= 3)
{
b64_encode_full_block(in, out);
len -= 3;
in += 3;
out += 4;
}
if (len > 0)
{
b64_encode_block(in, out, len);
out += 4;
}
out[0] = '\0';
return encoded;
}
/*
* MurmurHash2, 64-bit versions, by Austin Appleby
*
* Code released under the public domain, as per
* <http://murmurhash.googlepages.com/>
* as of 2010-01-03.
*/
#if SIZEOF_VOID_P == 8 /* 64bit platforms */
uint64_t
murmur_hash64(const void *key, int len, uint32_t seed)
{
const int r = 47;
const uint64_t m = 0xc6a4a7935bd1e995;
const uint64_t *data;
const uint64_t *end;
const unsigned char *data_tail;
uint64_t h;
uint64_t k;
h = seed ^ (len * m);
data = (const uint64_t *)key;
end = data + (len / 8);
while (data != end)
{
k = *data++;
k *= m;
k ^= k >> r;
k *= m;
h ^= k;
h *= m;
}
data_tail = (const unsigned char *)data;
switch (len & 7)
{
case 7:
h ^= (uint64_t)(data_tail[6]) << 48;
case 6:
h ^= (uint64_t)(data_tail[5]) << 40;
case 5:
h ^= (uint64_t)(data_tail[4]) << 32;
case 4:
h ^= (uint64_t)(data_tail[3]) << 24;
case 3:
h ^= (uint64_t)(data_tail[2]) << 16;
case 2:
h ^= (uint64_t)(data_tail[1]) << 8;
case 1:
h ^= (uint64_t)(data_tail[0]);
h *= m;
}
h ^= h >> r;
h *= m;
h ^= h >> r;
return h;
}
#elif SIZEOF_VOID_P == 4 /* 32bit platforms */
uint64_t
murmur_hash64(const void *key, int len, uint32_t seed)
{
const int r = 24;
const uint32_t m = 0x5bd1e995;
const uint32_t *data;
const unsigned char *data_tail;
uint32_t k1;
uint32_t h1;
uint32_t k2;
uint32_t h2;
uint64_t h;
h1 = seed ^ len;
h2 = 0;
data = (const uint32_t *)key;
while (len >= 8)
{
k1 = *data++;
k1 *= m; k1 ^= k1 >> r; k1 *= m;
h1 *= m; h1 ^= k1;
k2 = *data++;
k2 *= m; k2 ^= k2 >> r; k2 *= m;
h2 *= m; h2 ^= k2;
len -= 8;
}
if (len >= 4)
{
k1 = *data++;
k1 *= m; k1 ^= k1 >> r; k1 *= m;
h1 *= m; h1 ^= k1;
len -= 4;
}
data_tail = (const unsigned char *)data;
switch(len)
{
case 3:
h2 ^= (uint32_t)(data_tail[2]) << 16;
case 2:
h2 ^= (uint32_t)(data_tail[1]) << 8;
case 1:
h2 ^= (uint32_t)(data_tail[0]);
h2 *= m;
};
h1 ^= h2 >> 18; h1 *= m;
h2 ^= h1 >> 22; h2 *= m;
h1 ^= h2 >> 17; h1 *= m;
h2 ^= h1 >> 19; h2 *= m;
h = h1;
h = (h << 32) | h2;
return h;
}
#else
# error Platform not supported
#endif
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