diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/nds/libnds/source/common/gbfs.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/nds/libnds/source/common/gbfs.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/c/src/lib/libbsp/arm/nds/libnds/source/common/gbfs.c b/c/src/lib/libbsp/arm/nds/libnds/source/common/gbfs.c deleted file mode 100644 index 7f174e4c84..0000000000 --- a/c/src/lib/libbsp/arm/nds/libnds/source/common/gbfs.c +++ /dev/null @@ -1,202 +0,0 @@ -/*--------------------------------------------------------------------------------- - access object in a GBFS file - - Copyright 2002-2005 Damian Yerrick - - Additional code Dave Murphy - - Permission is hereby granted, free of charge, to any person obtaining - a copy of this software and associated documentation files (the - "Software"), to deal in the Software without restriction, including - without limitation the rights to use, copy, modify, merge, publish, - distribute, sublicense, and/or sell copies of the Software, and to - permit persons to whom the Software is furnished to do so, subject to - the following conditions: - - The above copyright notice and this permission notice shall be - included in all copies or substantial portions of the Software. - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF - OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS - IN THE SOFTWARE. - ----------------------------------------------------------------------------------*/ - - -/*--------------------------------------------------------------------------------- - This code assumes a LITTLE ENDIAN target. It'll need a boatload - of itohs and itohl calls if converted to run on Sega Genesis. It - also assumes that the target uses 16-bit short and 32-bit longs. ----------------------------------------------------------------------------------*/ - -#include <stdlib.h> -#include <string.h> -#include <nds/jtypes.h> -#include "gbfs.h" - -/*--------------------------------------------------------------------------------- - change this to the end of your ROM, - or to 0x02040000 for gba multiboot - or to 0x24000000 for nds main ram ----------------------------------------------------------------------------------*/ - -static const u32 * GBFS_1ST_SEARCH_LIMIT = (const u32 *)0x02400000; -static const u32 * GBFS_2ND_SEARCH_START = (const u32 *)0x08000000; -static const u32 * GBFS_2ND_SEARCH_LIMIT = (const u32 *)0x0a000000; -/*--------------------------------------------------------------------------------- - a power of two, less than or equal to the argument passed to - padbin. Increasing the stride makes find_first_gbfs_file() - faster at the cost of a slightly larger binary. ----------------------------------------------------------------------------------*/ -static int GBFS_STRIDE = 256; - -/*--------------------------------------------------------------------------------- - Set the search limits and stride for searching ----------------------------------------------------------------------------------*/ -void gbfs_search_range( - u32 gbfs_1st_limit, - u32 gbfs_2nd_start, u32 gbfs_2nd_limit, - u32 gbfs_stride -) { -//--------------------------------------------------------------------------------- - if ( 0 != gbfs_1st_limit ) GBFS_1ST_SEARCH_LIMIT = (u32 *)gbfs_1st_limit; - if ( 0 != gbfs_2nd_limit ) GBFS_2ND_SEARCH_LIMIT = (u32 *)gbfs_2nd_limit; - if ( 0 != gbfs_2nd_start ) GBFS_2ND_SEARCH_START = (u32 *)gbfs_2nd_start; - if ( 0 != gbfs_stride ) GBFS_STRIDE = gbfs_stride; - -} - -//--------------------------------------------------------------------------------- -const GBFS_FILE * find_first_gbfs_file(const void *start) { -//--------------------------------------------------------------------------------- - /* align the pointer */ - const u32 *here = (const u32 *) - ((unsigned long)start & (-GBFS_STRIDE)); - const char rest_of_magic[] = "ightGBFS\r\n\x1a\n"; - - /* Linear-search first in multiboot space. */ - while(here < GBFS_1ST_SEARCH_LIMIT) - { - /* We have to keep the magic code in two pieces; otherwise, - this function may find itself and think it's a GBFS file. - This obviously won't work if your compiler stores this - numeric literal just before the literal string, but Devkit - Advance R4 and R5 seem to keep numeric constant pools - separate enough from string pools for this to work. - */ - if(*here == 0x456e6950) { /* ASCII code for little endian "PinE" */ - /* We've matched the first four bytes. - If the rest of the magic matches, then we've found a file. */ - if(!memcmp(here + 1, rest_of_magic, 12)) - return (const GBFS_FILE *)here; - } - here += GBFS_STRIDE / sizeof(here); - } - - /* Now search in ROM space. */ - if(here < GBFS_2ND_SEARCH_START) - here = GBFS_2ND_SEARCH_START; - while(here < GBFS_2ND_SEARCH_LIMIT) { - /* Search loop same as above. */ - if(*here == 0x456e6950) { /* ASCII code for little endian "PinE" */ - if(!memcmp(here + 1, rest_of_magic, 12)) - return (const GBFS_FILE *)here; - } - here += GBFS_STRIDE / sizeof(*here); - } - return 0; -} - - -//--------------------------------------------------------------------------------- -const void *skip_gbfs_file(const GBFS_FILE *file) { -//--------------------------------------------------------------------------------- - return ((char *)file + file->total_len); -} - - -//--------------------------------------------------------------------------------- -static int namecmp(const void *a, const void *b) { -//--------------------------------------------------------------------------------- - return memcmp(a, b, 24); -} - - -//--------------------------------------------------------------------------------- -const void *gbfs_get_obj( const GBFS_FILE *file, - const char *name, - u32 *len) { -//--------------------------------------------------------------------------------- - char key[24] = {0}; - - const GBFS_ENTRY *dirbase = (const GBFS_ENTRY *)((const char *)file + file->dir_off); - size_t n_entries = file->dir_nmemb; - const GBFS_ENTRY *here; - - strncpy(key, name, 24); - - here = bsearch( key, dirbase, - n_entries, sizeof(GBFS_ENTRY), - namecmp); - if(!here) - return NULL; - - if(len) - *len = here->len; - return (char *)file + here->data_offset; -} - - -//--------------------------------------------------------------------------------- -const void *gbfs_get_nth_obj( const GBFS_FILE *file, - size_t n, - char *name, - u32 *len) -//--------------------------------------------------------------------------------- -{ - const GBFS_ENTRY *dirbase = (const GBFS_ENTRY *)((const char *)file + file->dir_off); - size_t n_entries = file->dir_nmemb; - const GBFS_ENTRY *here = dirbase + n; - - if(n >= n_entries) - return NULL; - - if(name) { - strncpy(name, here->name, 24); - name[24] = 0; - } - - if(len) - *len = here->len; - - return (char *)file + here->data_offset; -} - - -//--------------------------------------------------------------------------------- -void *gbfs_copy_obj( void *dst, - const GBFS_FILE *file, - const char *name) { -//--------------------------------------------------------------------------------- - u32 len; - const void *src = gbfs_get_obj(file, name, &len); - - if(!src) - return NULL; - - memcpy(dst, src, len); - return dst; -} - - -//--------------------------------------------------------------------------------- -size_t gbfs_count_objs(const GBFS_FILE *file) { -//--------------------------------------------------------------------------------- - return file ? file->dir_nmemb : 0; -} - |