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