Mercurial > hg > dmlib
changeset 1645:262300a0359b
Add helper functions dmReverse{Get,Put}Byte().
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Wed, 30 May 2018 00:57:21 +0300 |
| parents | 9d9a0e852b3d |
| children | 415c732dc14c |
| files | tools/lib64gfx.c tools/lib64gfx.h |
| diffstat | 2 files changed, 26 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/tools/lib64gfx.c Wed May 30 00:56:32 2018 +0300 +++ b/tools/lib64gfx.c Wed May 30 00:57:21 2018 +0300 @@ -100,6 +100,30 @@ } +BOOL dmReverseGetByte(const Uint8 *buf, size_t *offs, Uint8 *data) +{ + if (*offs > 0) + { + *data = buf[--(*offs)]; + return TRUE; + } + else + return FALSE; +} + + +BOOL dmReversePutByte(Uint8 *buf, size_t *offs, const Uint8 data) +{ + if (*offs > 0) + { + buf[--(*offs)] = data; + return TRUE; + } + else + return FALSE; +} + + int dmC64MemBlockAlloc(DMC64MemBlock *blk, const size_t size) { if ((blk->data = dmMalloc0(size)) == NULL)
--- a/tools/lib64gfx.h Wed May 30 00:56:32 2018 +0300 +++ b/tools/lib64gfx.h Wed May 30 00:57:21 2018 +0300 @@ -234,6 +234,8 @@ void dmSetDefaultC64Palette(DMImage *img); BOOL dmCompareAddr16(const Uint8 *buf, const size_t offs, const Uint16 addr); int dmC64ImageGetNumBanks(const DMC64ImageFormat *fmt); +BOOL dmReverseGetByte(const Uint8 *buf, size_t *offs, Uint8 *data); +BOOL dmReversePutByte(Uint8 *buf, size_t *offs, const Uint8 data); // C64 bitmap image allocation/freeing int dmC64MemBlockAlloc(DMC64MemBlock *blk, const size_t size);