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Diffstat (limited to 'trunk/src/lib/formats/imageutl.h')
-rw-r--r-- | trunk/src/lib/formats/imageutl.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/trunk/src/lib/formats/imageutl.h b/trunk/src/lib/formats/imageutl.h new file mode 100644 index 00000000000..1822b72a17a --- /dev/null +++ b/trunk/src/lib/formats/imageutl.h @@ -0,0 +1,207 @@ +/*************************************************************************** + + 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__ */ |