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author | 2015-11-08 12:56:12 +0100 | |
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committer | 2015-11-08 12:56:12 +0100 | |
commit | 7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch) | |
tree | f310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/lib/util/hashing.c | |
parent | a57b46ae933badd7441ce1644711dbb851e2b504 (diff) |
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/lib/util/hashing.c')
-rw-r--r-- | src/lib/util/hashing.c | 291 |
1 files changed, 0 insertions, 291 deletions
diff --git a/src/lib/util/hashing.c b/src/lib/util/hashing.c deleted file mode 100644 index e7f315ecc53..00000000000 --- a/src/lib/util/hashing.c +++ /dev/null @@ -1,291 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - hashing.c - - Hashing helper classes. - -***************************************************************************/ - -#include "hashing.h" -#include <zlib.h> - - -//************************************************************************** -// CONSTANTS -//************************************************************************** - -const crc16_t crc16_t::null = { 0 }; -const crc32_t crc32_t::null = { 0 }; -const md5_t md5_t::null = { { 0 } }; -const sha1_t sha1_t::null = { { 0 } }; - - - -//************************************************************************** -// INLINE FUNCTIONS -//************************************************************************** - -//------------------------------------------------- -// char_to_hex - return the hex value of a -// character -//------------------------------------------------- - -inline int char_to_hex(char c) -{ - if (c >= '0' && c <= '9') - return c - '0'; - if (c >= 'a' && c <= 'f') - return 10 + c - 'a'; - if (c >= 'A' && c <= 'F') - return 10 + c - 'A'; - return -1; -} - - - -//************************************************************************** -// SHA-1 HELPERS -//************************************************************************** - -//------------------------------------------------- -// from_string - convert from a string -//------------------------------------------------- - -bool sha1_t::from_string(const char *string, int length) -{ - // must be at least long enough to hold everything - memset(m_raw, 0, sizeof(m_raw)); - if (length == -1) - length = strlen(string); - if (length < 2 * sizeof(m_raw)) - return false; - - // iterate through our raw buffer - for (int bytenum = 0; bytenum < sizeof(m_raw); bytenum++) - { - int upper = char_to_hex(*string++); - int lower = char_to_hex(*string++); - if (upper == -1 || lower == -1) - return false; - m_raw[bytenum] = (upper << 4) | lower; - } - return true; -} - - -//------------------------------------------------- -// as_string - convert to a string -//------------------------------------------------- - -const char *sha1_t::as_string(std::string &buffer) const -{ - buffer.clear(); - for (int i = 0; i < ARRAY_LENGTH(m_raw); i++) - strcatprintf(buffer, "%02x", m_raw[i]); - return buffer.c_str(); -} - - -//************************************************************************** -// MD-5 HELPERS -//************************************************************************** - -//------------------------------------------------- -// from_string - convert from a string -//------------------------------------------------- - -bool md5_t::from_string(const char *string, int length) -{ - // must be at least long enough to hold everything - memset(m_raw, 0, sizeof(m_raw)); - if (length == -1) - length = strlen(string); - if (length < 2 * sizeof(m_raw)) - return false; - - // iterate through our raw buffer - for (int bytenum = 0; bytenum < sizeof(m_raw); bytenum++) - { - int upper = char_to_hex(*string++); - int lower = char_to_hex(*string++); - if (upper == -1 || lower == -1) - return false; - m_raw[bytenum] = (upper << 4) | lower; - } - return true; -} - - -//------------------------------------------------- -// as_string - convert to a string -//------------------------------------------------- - -const char *md5_t::as_string(std::string &buffer) const -{ - buffer.clear(); - for (int i = 0; i < ARRAY_LENGTH(m_raw); i++) - strcatprintf(buffer, "%02x", m_raw[i]); - return buffer.c_str(); -} - - - -//************************************************************************** -// CRC-32 HELPERS -//************************************************************************** - -//------------------------------------------------- -// from_string - convert from a string -//------------------------------------------------- - -bool crc32_t::from_string(const char *string, int length) -{ - // must be at least long enough to hold everything - m_raw = 0; - if (length == -1) - length = strlen(string); - if (length < 2 * sizeof(m_raw)) - return false; - - // iterate through our raw buffer - m_raw = 0; - for (int bytenum = 0; bytenum < sizeof(m_raw) * 2; bytenum++) - { - int nibble = char_to_hex(*string++); - if (nibble == -1) - return false; - m_raw = (m_raw << 4) | nibble; - } - return true; -} - - -//------------------------------------------------- -// as_string - convert to a string -//------------------------------------------------- - -const char *crc32_t::as_string(std::string &buffer) const -{ - strprintf(buffer, "%08x", m_raw); - return buffer.c_str(); -} - - -//------------------------------------------------- -// append - hash a block of data, appending to -// the currently-accumulated value -//------------------------------------------------- - -void crc32_creator::append(const void *data, UINT32 length) -{ - m_accum.m_raw = crc32(m_accum, reinterpret_cast<const Bytef *>(data), length); -} - - - -//************************************************************************** -// CRC-16 HELPERS -//************************************************************************** - -//------------------------------------------------- -// from_string - convert from a string -//------------------------------------------------- - -bool crc16_t::from_string(const char *string, int length) -{ - // must be at least long enough to hold everything - m_raw = 0; - if (length == -1) - length = strlen(string); - if (length < 2 * sizeof(m_raw)) - return false; - - // iterate through our raw buffer - m_raw = 0; - for (int bytenum = 0; bytenum < sizeof(m_raw) * 2; bytenum++) - { - int nibble = char_to_hex(*string++); - if (nibble == -1) - return false; - m_raw = (m_raw << 4) | nibble; - } - return true; -} - -/** - * @fn const char *crc16_t::as_string(std::string &buffer) const - * - * @brief ------------------------------------------------- - * as_string - convert to a string - * -------------------------------------------------. - * - * @param [in,out] buffer The buffer. - * - * @return null if it fails, else a char*. - */ - -const char *crc16_t::as_string(std::string &buffer) const -{ - strprintf(buffer, "%04x", m_raw); - return buffer.c_str(); -} - -/** - * @fn void crc16_creator::append(const void *data, UINT32 length) - * - * @brief ------------------------------------------------- - * append - hash a block of data, appending to the currently-accumulated value - * -------------------------------------------------. - * - * @param data The data. - * @param length The length. - */ - -void crc16_creator::append(const void *data, UINT32 length) -{ - static const UINT16 s_table[256] = - { - 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, - 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, - 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, - 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, - 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, - 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, - 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, - 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc, - 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, - 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, - 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, - 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, - 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, - 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, - 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, - 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, - 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, - 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067, - 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, - 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, - 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, - 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, - 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, - 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, - 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, - 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, - 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, - 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, - 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, - 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, - 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, - 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0 - }; - - const UINT8 *src = reinterpret_cast<const UINT8 *>(data); - - // fetch the current value into a local and rip through the source data - UINT16 crc = m_accum.m_raw; - while (length-- != 0) - crc = (crc << 8) ^ s_table[(crc >> 8) ^ *src++]; - m_accum.m_raw = crc; -} |