Mercurial > sdl-ios-xcode
annotate include/SDL_rwops.h @ 571:8e3ce997621c
Date: Thu, 16 Jan 2003 13:48:31 +0200
From: "Mike Gorchak"
Subject: All QNX patches
whole patches concerning QNX. Almost all code has been rewritten by Julian
and me. Added initial support for hw overlays in QNX and many many others
fixes.
P.S. This patches has been reviewed by Dave Rempel from QSSL and included in
SDL 1.2.5 distribution, which coming on 3rd party CD for newest 6.2.1
version of QNX, which will be available soon.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 20 Jan 2003 01:38:37 +0000 |
| parents | 9154ec9ca3d2 |
| children | 974c0fb74bf8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* This file provides a general interface for SDL to read and write | |
| 29 data sources. It can easily be extended to files, memory, etc. | |
| 30 */ | |
| 31 | |
| 32 #ifndef _SDL_RWops_h | |
| 33 #define _SDL_RWops_h | |
| 34 | |
| 35 #include <stdio.h> | |
| 36 | |
| 37 #include "SDL_types.h" | |
| 38 | |
| 39 #include "begin_code.h" | |
| 40 /* Set up for C function definitions, even when using C++ */ | |
| 41 #ifdef __cplusplus | |
| 42 extern "C" { | |
| 43 #endif | |
| 44 | |
| 45 /* This is the read/write operation structure -- very basic */ | |
| 46 | |
| 47 typedef struct SDL_RWops { | |
| 48 /* Seek to 'offset' relative to whence, one of stdio's whence values: | |
| 49 SEEK_SET, SEEK_CUR, SEEK_END | |
| 50 Returns the final offset in the data source. | |
| 51 */ | |
| 52 int (*seek)(struct SDL_RWops *context, int offset, int whence); | |
| 53 | |
| 54 /* Read up to 'num' objects each of size 'objsize' from the data | |
| 55 source to the area pointed at by 'ptr'. | |
| 56 Returns the number of objects read, or -1 if the read failed. | |
| 57 */ | |
| 58 int (*read)(struct SDL_RWops *context, void *ptr, int size, int maxnum); | |
| 59 | |
| 60 /* Write exactly 'num' objects each of size 'objsize' from the area | |
| 61 pointed at by 'ptr' to data source. | |
| 62 Returns 'num', or -1 if the write failed. | |
| 63 */ | |
| 64 int (*write)(struct SDL_RWops *context, const void *ptr, int size, int num); | |
| 65 | |
| 66 /* Close and free an allocated SDL_FSops structure */ | |
| 67 int (*close)(struct SDL_RWops *context); | |
| 68 | |
| 69 Uint32 type; | |
| 70 union { | |
| 71 struct { | |
| 72 int autoclose; | |
| 73 FILE *fp; | |
| 74 } stdio; | |
| 75 struct { | |
| 76 Uint8 *base; | |
| 77 Uint8 *here; | |
| 78 Uint8 *stop; | |
| 79 } mem; | |
| 80 struct { | |
| 81 void *data1; | |
| 82 } unknown; | |
| 83 } hidden; | |
| 84 | |
| 85 } SDL_RWops; | |
| 86 | |
| 87 | |
| 88 /* Functions to create SDL_RWops structures from various data sources */ | |
| 89 | |
|
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90 extern DECLSPEC SDL_RWops * SDLCALL SDL_RWFromFile(const char *file, const char *mode); |
| 0 | 91 |
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92 extern DECLSPEC SDL_RWops * SDLCALL SDL_RWFromFP(FILE *fp, int autoclose); |
| 0 | 93 |
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94 extern DECLSPEC SDL_RWops * SDLCALL SDL_RWFromMem(void *mem, int size); |
| 0 | 95 |
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96 extern DECLSPEC SDL_RWops * SDLCALL SDL_AllocRW(void); |
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Explicitly specify the SDL API calling convention (C by default)
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parents:
297
diff
changeset
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97 extern DECLSPEC void SDLCALL SDL_FreeRW(SDL_RWops *area); |
| 0 | 98 |
| 99 /* Macros to easily read and write from an SDL_RWops structure */ | |
| 100 #define SDL_RWseek(ctx, offset, whence) (ctx)->seek(ctx, offset, whence) | |
| 101 #define SDL_RWtell(ctx) (ctx)->seek(ctx, 0, SEEK_CUR) | |
| 102 #define SDL_RWread(ctx, ptr, size, n) (ctx)->read(ctx, ptr, size, n) | |
| 103 #define SDL_RWwrite(ctx, ptr, size, n) (ctx)->write(ctx, ptr, size, n) | |
| 104 #define SDL_RWclose(ctx) (ctx)->close(ctx) | |
| 105 | |
| 106 | |
| 107 /* Ends C function definitions when using C++ */ | |
| 108 #ifdef __cplusplus | |
| 109 } | |
| 110 #endif | |
| 111 #include "close_code.h" | |
| 112 | |
| 113 #endif /* _SDL_RWops_h */ |