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Added an API to get the size of a file - WARNING! ABI CHANGE!

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This commit is contained in:
Sam Lantinga 2012-11-03 18:43:36 -07:00
parent 732a5d8165
commit 9bd6a89040
7 changed files with 102 additions and 38 deletions
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2
include/SDL_config.h.in
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@ -139,6 +139,8 @@
#undef HAVE_SIN
#undef HAVE_SINF
#undef HAVE_SQRT
#undef HAVE_FSEEKO
#undef HAVE_FSEEKO64
#undef HAVE_SIGACTION
#undef HAVE_SA_SIGACTION
#undef HAVE_SETJMP

18
include/SDL_rwops.h
View file

@ -45,14 +45,19 @@ extern "C" {
*/
typedef struct SDL_RWops
{
/**
* Return the size of the file in this rwops, or -1 if unknown
*/
Sint64 (SDLCALL * size) (struct SDL_RWops * context);
/**
* Seek to \c offset relative to \c whence, one of stdio's whence values:
* RW_SEEK_SET, RW_SEEK_CUR, RW_SEEK_END
*
* \return the final offset in the data stream.
*/
long (SDLCALL * seek) (struct SDL_RWops * context, long offset,
int whence);
Sint64 (SDLCALL * seek) (struct SDL_RWops * context, Sint64 offset,
int whence);
/**
* Read up to \c maxnum objects each of size \c size from the data
@ -60,8 +65,8 @@ typedef struct SDL_RWops
*
* \return the number of objects read, or 0 at error or end of file.
*/
size_t(SDLCALL * read) (struct SDL_RWops * context, void *ptr,
size_t size, size_t maxnum);
size_t (SDLCALL * read) (struct SDL_RWops * context, void *ptr,
size_t size, size_t maxnum);
/**
* Write exactly \c num objects each of size \c size from the area
@ -69,8 +74,8 @@ typedef struct SDL_RWops
*
* \return the number of objects written, or 0 at error or end of file.
*/
size_t(SDLCALL * write) (struct SDL_RWops * context, const void *ptr,
size_t size, size_t num);
size_t (SDLCALL * write) (struct SDL_RWops * context, const void *ptr,
size_t size, size_t num);
/**
* Close and free an allocated SDL_RWops structure.
@ -166,6 +171,7 @@ extern DECLSPEC void SDLCALL SDL_FreeRW(SDL_RWops * area);
* Macros to easily read and write from an SDL_RWops structure.
*/
/*@{*/
#define SDL_RWsize(ctx) (ctx)->size(ctx)
#define SDL_RWseek(ctx, offset, whence) (ctx)->seek(ctx, offset, whence)
#define SDL_RWtell(ctx) (ctx)->seek(ctx, 0, RW_SEEK_CUR)
#define SDL_RWread(ctx, ptr, size, n) (ctx)->read(ctx, ptr, size, n)