DRAFT |
SDL_RWwrite
Use this function to write to a data source -or- *call the write function in an SDL_RWops structure.*
Contents
Syntax
size_t SDL_RWwrite(struct SDL_RWops* context,
const void* ptr,
size_t size,
size_t num)
Function Parameters
context |
an SDL_RWops structure containing the write function |
ptr |
*a pointer to an area in memory to read data from* |
size |
*the size of the memory blocks to write* |
num |
*the exact number of memory blocks to write* |
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Return Value
Returns the number of objects written, or 0 at error or end of file; call SDL_GetError() for more information.
-or-
*>>On success,>> it returns the number of memory blocks you told it to write >> >>. If it couldn't write that exact number of blocks, or the write didn't work at all, it returns -1 a negative error code*; call SDL_GetError() for more information.
Code Examples
*
#include <stdio.h>
#include <string.h>
#include "SDL_rwops.h"
int main()
{
int written;
char *str="Hello World";
SDL_RWops *rw=SDL_RWFromFile("test.bin","wb");
if(rw==NULL)
{
fprintf(stderr,"Couldn't open test.bin\n");
return(1);
}
written=SDL_RWwrite(rw,str,1,strlen(str));
SDL_RWclose(rw);
if(written<0)
{
fprintf(stderr,"Couldn't write to test.bin\n");
return(2);
}
fprintf(stderr,"Wrote %d 1-byte blocks\n",written);
return(0);
}
*
Remarks
*
This is not a built-in function. This is a macro that calls whatever write function happens to be in the SDL_RWops structure.
*
SDL_RWwrite writes exactly num objects each of size size from the area pointed at by ptr to data source. green
Related Functions
SDL_RWclose (Macro) *
SDL_RWread (Macro) *
SDL_RWseek(Macro) *
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