1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
|
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@devolution.com
*/
/* This file provides a general interface for SDL to read and write
data sources. It can easily be extended to files, memory, etc.
*/
import SDL_types;
extern(C):
/* This is the read/write operation structure -- very basic */
struct SDL_RWops {
/* Seek to 'offset' relative to whence, one of stdio's whence values:
SEEK_SET, SEEK_CUR, SEEK_END
Returns the final offset in the data source.
*/
int function(SDL_RWops *context, int offset, int whence) seek;
/* Read up to 'num' objects each of size 'objsize' from the data
source to the area pointed at by 'ptr'.
Returns the number of objects read, or -1 if the read failed.
*/
int function(SDL_RWops *context, void *ptr, int size, int maxnum) read;
/* Write exactly 'num' objects each of size 'objsize' from the area
pointed at by 'ptr' to data source.
Returns 'num', or -1 if the write failed.
*/
int function(SDL_RWops *context, void *ptr, int size, int num) write;
/* Close and free an allocated SDL_FSops structure */
int function(SDL_RWops *context) close;
Uint32 type;
union {
struct {
int autoclose;
void *fp; // was FILE
} // stdio;
struct {
Uint8 *base;
Uint8 *here;
Uint8 *stop;
} // mem;
struct {
void *data1;
} // unknown;
} // hidden;
}
/* Functions to create SDL_RWops structures from various data sources */
SDL_RWops * SDL_RWFromFile(const(char)* file, const(char)* mode);
SDL_RWops * SDL_RWFromFP(void *fp, int autoclose);
SDL_RWops * SDL_RWFromMem(void *mem, int size);
SDL_RWops * SDL_AllocRW();
void SDL_FreeRW(SDL_RWops *area);
/* Macros to easily read and write from an SDL_RWops structure */
int SDL_RWseek(SDL_RWops *ctx, int offset, int whence)
{
return ctx.seek(ctx, offset, whence);
}
int SDL_RWtell(SDL_RWops *ctx)
{
return ctx.seek(ctx, 0, 1);
}
int SDL_RWread(SDL_RWops *ctx, void* ptr, int size, int n)
{
return ctx.read(ctx, ptr, size, n);
}
int SDL_RWwrite(SDL_RWops *ctx, void* ptr, int size, int n)
{
return ctx.write(ctx, ptr, size, n);
}
int SDL_RWclose(SDL_RWops *ctx)
{
return ctx.close(ctx);
}
|