Mercurial > sdl-ios-xcode
diff src/file/SDL_rwops.c @ 764:974c0fb74bf8
Added function to create RWops from const memory: SDL_RWFromConstMem()
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 04 Jan 2004 15:18:08 +0000 |
| parents | 522e5202014d |
| children | b8d311d90021 |
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--- a/src/file/SDL_rwops.c Sun Jan 04 15:11:35 2004 +0000 +++ b/src/file/SDL_rwops.c Sun Jan 04 15:18:08 2004 +0000 @@ -129,6 +129,11 @@ context->hidden.mem.here += num*size; return(num); } +static int mem_writeconst(SDL_RWops *context, const void *ptr, int size, int num) +{ + SDL_SetError("Can't write to read-only memory"); + return(-1); +} static int mem_close(SDL_RWops *context) { if ( context ) { @@ -258,6 +263,23 @@ return(rwops); } +SDL_RWops *SDL_RWFromConstMem(const void *mem, int size) +{ + SDL_RWops *rwops; + + rwops = SDL_AllocRW(); + if ( rwops != NULL ) { + rwops->seek = mem_seek; + rwops->read = mem_read; + rwops->write = mem_writeconst; + rwops->close = mem_close; + rwops->hidden.mem.base = (Uint8 *)mem; + rwops->hidden.mem.here = rwops->hidden.mem.base; + rwops->hidden.mem.stop = rwops->hidden.mem.base+size; + } + return(rwops); +} + SDL_RWops *SDL_AllocRW(void) { SDL_RWops *area;