/*************************************************************************** imageutl.h Image related utilities **************************************************************************** Copyright Aaron Giles All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * 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. * Neither the name 'MAME' 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 AARON GILES ''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 AARON GILES 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. ***************************************************************************/ #pragma once #ifndef __IMAGEUTL_H__ #define __IMAGEUTL_H__ #include "osdcore.h" /* ----------------------------------------------------------------------- * CRC stuff * ----------------------------------------------------------------------- */ unsigned short ccitt_crc16(unsigned short crc, const unsigned char *buffer, size_t buffer_len); unsigned short ccitt_crc16_one( unsigned short crc, const unsigned char data ); /* ----------------------------------------------------------------------- * Alignment-friendly integer placement * ----------------------------------------------------------------------- */ INLINE void place_integer_be(void *ptr, size_t offset, size_t size, UINT64 value) { UINT8 *byte_ptr = ((UINT8 *) ptr) + offset; UINT16 val16; UINT32 val32; switch(size) { case 2: val16 = BIG_ENDIANIZE_INT16((UINT16) value); memcpy(byte_ptr, &val16, sizeof(val16)); break; case 4: val32 = BIG_ENDIANIZE_INT32((UINT32) value); memcpy(byte_ptr, &val32, sizeof(val32)); break; default: if (size >= 1) byte_ptr[0] = (UINT8) (value >> ((size - 1) * 8)); if (size >= 2) byte_ptr[1] = (UINT8) (value >> ((size - 2) * 8)); if (size >= 3) byte_ptr[2] = (UINT8) (value >> ((size - 3) * 8)); if (size >= 4) byte_ptr[3] = (UINT8) (value >> ((size - 4) * 8)); if (size >= 5) byte_ptr[4] = (UINT8) (value >> ((size - 5) * 8)); if (size >= 6) byte_ptr[5] = (UINT8) (value >> ((size - 6) * 8)); if (size >= 7) byte_ptr[6] = (UINT8) (value >> ((size - 7) * 8)); if (size >= 8) byte_ptr[7] = (UINT8) (value >> ((size - 8) * 8)); break; } } INLINE UINT64 pick_integer_be(const void *ptr, size_t offset, size_t size) { UINT64 result = 0; const UINT8 *byte_ptr = ((const UINT8 *) ptr) + offset; UINT16 val16; UINT32 val32; switch(size) { case 1: result = *byte_ptr; break; case 2: memcpy(&val16, byte_ptr, sizeof(val16)); result = BIG_ENDIANIZE_INT16(val16); break; case 4: memcpy(&val32, byte_ptr, sizeof(val32)); result = BIG_ENDIANIZE_INT32(val32); break; default: if (size >= 1) result |= ((UINT64) byte_ptr[0]) << ((size - 1) * 8); if (size >= 2) result |= ((UINT64) byte_ptr[1]) << ((size - 2) * 8); if (size >= 3) result |= ((UINT64) byte_ptr[2]) << ((size - 3) * 8); if (size >= 4) result |= ((UINT64) byte_ptr[3]) << ((size - 4) * 8); if (size >= 5) result |= ((UINT64) byte_ptr[4]) << ((size - 5) * 8); if (size >= 6) result |= ((UINT64) byte_ptr[5]) << ((size - 6) * 8); if (size >= 7) result |= ((UINT64) byte_ptr[6]) << ((size - 7) * 8); if (size >= 8) result |= ((UINT64) byte_ptr[7]) << ((size - 8) * 8); break; } return result; } INLINE void place_integer_le(void *ptr, size_t offset, size_t size, UINT64 value) { UINT8 *byte_ptr = ((UINT8 *) ptr) + offset; UINT16 val16; UINT32 val32; switch(size) { case 2: val16 = LITTLE_ENDIANIZE_INT16((UINT16) value); memcpy(byte_ptr, &val16, sizeof(val16)); break; case 4: val32 = LITTLE_ENDIANIZE_INT32((UINT32) value); memcpy(byte_ptr, &val32, sizeof(val32)); break; default: if (size >= 1) byte_ptr[0] = (UINT8) (value >> (0 * 8)); if (size >= 2) byte_ptr[1] = (UINT8) (value >> (1 * 8)); if (size >= 3) byte_ptr[2] = (UINT8) (value >> (2 * 8)); if (size >= 4) byte_ptr[3] = (UINT8) (value >> (3 * 8)); if (size >= 5) byte_ptr[4] = (UINT8) (value >> (4 * 8)); if (size >= 6) byte_ptr[5] = (UINT8) (value >> (5 * 8)); if (size >= 7) byte_ptr[6] = (UINT8) (value >> (6 * 8)); if (size >= 8) byte_ptr[7] = (UINT8) (value >> (7 * 8)); break; } } INLINE UINT64 pick_integer_le(const void *ptr, size_t offset, size_t size) { UINT64 result = 0; const UINT8 *byte_ptr = ((const UINT8 *) ptr) + offset; UINT16 val16; UINT32 val32; switch(size) { case 1: result = *byte_ptr; break; case 2: memcpy(&val16, byte_ptr, sizeof(val16)); result = LITTLE_ENDIANIZE_INT16(val16); break; case 4: memcpy(&val32, byte_ptr, sizeof(val32)); result = LITTLE_ENDIANIZE_INT32(val32); break; default: if (size >= 1) result |= ((UINT64) byte_ptr[0]) << (0 * 8); if (size >= 2) result |= ((UINT64) byte_ptr[1]) << (1 * 8); if (size >= 3) result |= ((UINT64) byte_ptr[2]) << (2 * 8); if (size >= 4) result |= ((UINT64) byte_ptr[3]) << (3 * 8); if (size >= 5) result |= ((UINT64) byte_ptr[4]) << (4 * 8); if (size >= 6) result |= ((UINT64) byte_ptr[5]) << (5 * 8); if (size >= 7) result |= ((UINT64) byte_ptr[6]) << (6 * 8); if (size >= 8) result |= ((UINT64) byte_ptr[7]) << (7 * 8); break; } return result; } /* ----------------------------------------------------------------------- * Miscellaneous * ----------------------------------------------------------------------- */ /* miscellaneous functions */ int compute_log2(int val); /* ----------------------------------------------------------------------- * Extension list handling * ----------------------------------------------------------------------- */ int image_find_extension(const char *extensions, const char *ext); void image_specify_extension(char *buffer, size_t buffer_len, const char *extension); #endif /* __IMAGEUTL_H__ */