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annotate src/file/SDL_rwops.c @ 4038:eeb0862b9697 SDL-1.2

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Simplified Win32 file opening code
author Sam Lantinga <slouken@libsdl.org>
date Tue, 10 Jul 2007 16:01:46 +0000 (2007-07-10)
parents 3ccd06fc22e5
children 7fd9a811efc7
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* This file provides a general interface for SDL to read and write
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25 data sources. It can easily be extended to files, memory, etc.
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26 */
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27
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28 #include "SDL_endian.h"
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29 #include "SDL_rwops.h"
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30
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31
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32 #if defined(__WIN32__) && !defined(__SYMBIAN32__)
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33
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34 /* Functions to read/write Win32 API file pointers */
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35 /* Will not use it on WinCE because stdio is buffered, it means
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36 faster, and all stdio functions anyway are embedded in coredll.dll -
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37 the main wince dll*/
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38
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39 #define WINDOWS_LEAN_AND_MEAN
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40 #include <windows.h>
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41
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42 #ifndef INVALID_SET_FILE_POINTER
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43 #define INVALID_SET_FILE_POINTER 0xFFFFFFFF
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44 #endif
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45
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46 #define READAHEAD_BUFFER_SIZE 1024
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47
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48 static int SDLCALL win32_file_open(SDL_RWops *context, const char *filename, const char *mode)
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49 {
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50 #ifndef _WIN32_WCE
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51 UINT old_error_mode;
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52 #endif
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53 HANDLE h;
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54 DWORD r_right, w_right;
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55 DWORD must_exist, truncate;
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56 int a_mode;
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57
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58 if (!context)
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59 return -1; /* failed (invalid call) */
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60
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61 /* "r" = reading, file must exist */
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62 /* "w" = writing, truncate existing, file may not exist */
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63 /* "r+"= reading or writing, file must exist */
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64 /* "a" = writing, append file may not exist */
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65 /* "a+"= append + read, file may not exist */
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66 /* "w+" = read, write, truncate. file may not exist */
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67
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68 must_exist = ( SDL_strchr(mode,'r') != NULL ) ? OPEN_EXISTING : 0;
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69 truncate = ( SDL_strchr(mode,'w') != NULL ) ? CREATE_ALWAYS : 0;
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70 r_right = ( SDL_strchr(mode,'+') != NULL || must_exist ) ? GENERIC_READ : 0;
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71 a_mode = ( SDL_strchr(mode,'a') != NULL ) ? OPEN_ALWAYS : 0;
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72 w_right = ( a_mode || SDL_strchr(mode,'+') || truncate ) ? GENERIC_WRITE : 0;
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73
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74 if (!r_right && !w_right) /* inconsistent mode */
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75 return -1; /* failed (invalid call) */
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76
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77 #ifdef _WIN32_WCE
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78 {
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79 size_t size = SDL_strlen(filename)+1;
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80 wchar_t *filenameW = SDL_stack_alloc(wchar_t, size);
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81
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82 if ( MultiByteToWideChar(CP_UTF8, 0, filename, -1, filenameW, size) == 0 ) {
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83 SDL_SetError("Unable to convert filename to Unicode");
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84 SDL_stack_free(filenameW);
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85 return -1;
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86 }
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87 h = CreateFile(filenameW, (w_right|r_right), (w_right)? 0 : FILE_SHARE_READ,
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88 NULL, (must_exist|truncate|a_mode), FILE_ATTRIBUTE_NORMAL,NULL);
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89 SDL_stack_free(filenameW);
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90 }
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91 #else
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92 /* Do not open a dialog box if failure */
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93 old_error_mode = SetErrorMode(SEM_NOOPENFILEERRORBOX|SEM_FAILCRITICALERRORS);
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94
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95 h = CreateFile(filename, (w_right|r_right), (w_right)? 0 : FILE_SHARE_READ,
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96 NULL, (must_exist|truncate|a_mode), FILE_ATTRIBUTE_NORMAL,NULL);
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97
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98 /* restore old behaviour */
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99 SetErrorMode(old_error_mode);
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100 #endif /* _WIN32_WCE */
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101
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102 if (h==INVALID_HANDLE_VALUE) {
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103 SDL_SetError("Couldn't open %s",filename);
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104 return -2; /* failed (CreateFile) */
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105 }
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106 context->hidden.win32io.h = h;
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107 context->hidden.win32io.append = a_mode;
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108
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109 context->hidden.win32io.buffer.data = (char *)SDL_malloc(READAHEAD_BUFFER_SIZE);
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110 if (!context->hidden.win32io.buffer.data) {
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111 SDL_OutOfMemory();
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112 CloseHandle(context->hidden.win32io.h);
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113 return -1;
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114 }
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115 context->hidden.win32io.buffer.size = 0;
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116 context->hidden.win32io.buffer.left = 0;
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117
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118 return 0; /* ok */
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119 }
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120 static int SDLCALL win32_file_seek(SDL_RWops *context, int offset, int whence)
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121 {
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122 DWORD win32whence;
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123 int file_pos;
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124
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125 if (!context || context->hidden.win32io.h == INVALID_HANDLE_VALUE) {
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126 SDL_SetError("win32_file_seek: invalid context/file not opened");
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127 return -1;
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128 }
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129
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130 /* FIXME: We may be able to satisfy the seek within buffered data */
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
131 if (whence == RW_SEEK_CUR && context->hidden.win32io.buffer.left) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
132 offset -= context->hidden.win32io.buffer.left;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
133 }
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
134 context->hidden.win32io.buffer.left = 0;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
135
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
136 switch (whence) {
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
137 case RW_SEEK_SET:
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
138 win32whence = FILE_BEGIN; break;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
139 case RW_SEEK_CUR:
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
140 win32whence = FILE_CURRENT; break;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
141 case RW_SEEK_END:
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
142 win32whence = FILE_END; break;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
143 default:
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
144 SDL_SetError("win32_file_seek: Unknown value for 'whence'");
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
145 return -1;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
146 }
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
147
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
148 file_pos = SetFilePointer(context->hidden.win32io.h,offset,NULL,win32whence);
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
149
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
150 if ( file_pos != INVALID_SET_FILE_POINTER )
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
151 return file_pos; /* success */
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
152
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
153 SDL_Error(SDL_EFSEEK);
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
154 return -1; /* error */
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
155 }
1769
290b5baf2fca Fixed bug #215
Sam Lantinga <slouken@libsdl.org>
parents: 1465
diff changeset
156 static int SDLCALL win32_file_read(SDL_RWops *context, void *ptr, int size, int maxnum)
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
157 {
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
158 int total_need;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
159 int total_read = 0;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
160 int read_ahead;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
161 DWORD byte_read;
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
162
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
163 total_need = size*maxnum;
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
164
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
165 if (!context || context->hidden.win32io.h == INVALID_HANDLE_VALUE || total_need<=0 || !size)
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
166 return 0;
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
167
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
168 if (context->hidden.win32io.buffer.left > 0) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
169 void *data = (char *)context->hidden.win32io.buffer.data +
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
170 context->hidden.win32io.buffer.size -
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
171 context->hidden.win32io.buffer.left;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
172 read_ahead = SDL_min(total_need, context->hidden.win32io.buffer.left);
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
173 SDL_memcpy(ptr, data, read_ahead);
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
174 context->hidden.win32io.buffer.left -= read_ahead;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
175
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
176 if (read_ahead == total_need) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
177 return maxnum;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
178 }
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
179 ptr = (char *)ptr + read_ahead;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
180 total_need -= read_ahead;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
181 total_read += read_ahead;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
182 }
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
183
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
184 if (total_need < READAHEAD_BUFFER_SIZE) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
185 if (!ReadFile(context->hidden.win32io.h,context->hidden.win32io.buffer.data,READAHEAD_BUFFER_SIZE,&byte_read,NULL)) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
186 SDL_Error(SDL_EFREAD);
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
187 return 0;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
188 }
4027
407ecf3ad3b3 Fixed signed/unsigned mismatch ... hmm, limited to 2 GB reads? Fix in SDL 1.3
Sam Lantinga <slouken@libsdl.org>
parents: 4026
diff changeset
189 read_ahead = SDL_min(total_need, (int)byte_read);
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
190 SDL_memcpy(ptr, context->hidden.win32io.buffer.data, read_ahead);
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
191 context->hidden.win32io.buffer.size = byte_read;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
192 context->hidden.win32io.buffer.left = byte_read-read_ahead;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
193 total_read += read_ahead;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
194 } else {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
195 if (!ReadFile(context->hidden.win32io.h,ptr,total_need,&byte_read,NULL)) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
196 SDL_Error(SDL_EFREAD);
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
197 return 0;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
198 }
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
199 total_read += byte_read;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
200 }
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
201 return (total_read/size);
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
202 }
1769
290b5baf2fca Fixed bug #215
Sam Lantinga <slouken@libsdl.org>
parents: 1465
diff changeset
203 static int SDLCALL win32_file_write(SDL_RWops *context, const void *ptr, int size, int num)
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
204 {
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
205
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
206 int total_bytes;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
207 DWORD byte_written,nwritten;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
208
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
209 total_bytes = size*num;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
210
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
211 if (!context || context->hidden.win32io.h==INVALID_HANDLE_VALUE || total_bytes<=0 || !size)
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
212 return 0;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
213
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
214 if (context->hidden.win32io.buffer.left) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
215 SetFilePointer(context->hidden.win32io.h,-context->hidden.win32io.buffer.left,NULL,FILE_CURRENT);
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
216 context->hidden.win32io.buffer.left = 0;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
217 }
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
218
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
219 /* if in append mode, we must go to the EOF before write */
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
220 if (context->hidden.win32io.append) {
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
221 if ( SetFilePointer(context->hidden.win32io.h,0L,NULL,FILE_END) == INVALID_SET_FILE_POINTER ) {
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
222 SDL_Error(SDL_EFWRITE);
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
223 return 0;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
224 }
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
225 }
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
226
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
227 if (!WriteFile(context->hidden.win32io.h,ptr,total_bytes,&byte_written,NULL)) {
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
228 SDL_Error(SDL_EFWRITE);
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
229 return 0;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
230 }
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
231
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
232 nwritten = byte_written/size;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
233 return nwritten;
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
234 }
1769
290b5baf2fca Fixed bug #215
Sam Lantinga <slouken@libsdl.org>
parents: 1465
diff changeset
235 static int SDLCALL win32_file_close(SDL_RWops *context)
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
236 {
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
237
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
238 if ( context ) {
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
239 if (context->hidden.win32io.h != INVALID_HANDLE_VALUE) {
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
240 CloseHandle(context->hidden.win32io.h);
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
241 context->hidden.win32io.h = INVALID_HANDLE_VALUE; /* to be sure */
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
242 }
4026
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
243 if (context->hidden.win32io.buffer.data) {
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
244 SDL_free(context->hidden.win32io.buffer.data);
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
245 context->hidden.win32io.buffer.data = NULL;
255b0469ca83 Added read-ahead support for Win32 file IO
Sam Lantinga <slouken@libsdl.org>
parents: 3975
diff changeset
246 }
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
247 SDL_FreeRW(context);
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
248 }
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
249 return(0);
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
250 }
1447
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
251 #endif /* __WIN32__ */
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
252
1447
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
253 #ifdef HAVE_STDIO_H
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
254
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
255 /* Functions to read/write stdio file pointers */
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
256
1769
290b5baf2fca Fixed bug #215
Sam Lantinga <slouken@libsdl.org>
parents: 1465
diff changeset
257 static int SDLCALL stdio_seek(SDL_RWops *context, int offset, int whence)
1447
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
258 {
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
259 if ( fseek(context->hidden.stdio.fp, offset, whence) == 0 ) {
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
260 return(ftell(context->hidden.stdio.fp));
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
261 } else {
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
262 SDL_Error(SDL_EFSEEK);
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
263 return(-1);
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
264 }
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
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265 }
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266 static int SDLCALL stdio_read(SDL_RWops *context, void *ptr, int size, int maxnum)
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267 {
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268 size_t nread;
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269
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270 nread = fread(ptr, size, maxnum, context->hidden.stdio.fp);
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271 if ( nread == 0 && ferror(context->hidden.stdio.fp) ) {
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272 SDL_Error(SDL_EFREAD);
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273 }
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274 return(nread);
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275 }
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276 static int SDLCALL stdio_write(SDL_RWops *context, const void *ptr, int size, int num)
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277 {
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278 size_t nwrote;
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279
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280 nwrote = fwrite(ptr, size, num, context->hidden.stdio.fp);
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281 if ( nwrote == 0 && ferror(context->hidden.stdio.fp) ) {
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282 SDL_Error(SDL_EFWRITE);
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283 }
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284 return(nwrote);
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285 }
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286 static int SDLCALL stdio_close(SDL_RWops *context)
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287 {
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288 if ( context ) {
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289 if ( context->hidden.stdio.autoclose ) {
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290 /* WARNING: Check the return value here! */
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291 fclose(context->hidden.stdio.fp);
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292 }
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293 SDL_FreeRW(context);
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294 }
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295 return(0);
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296 }
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297 #endif /* !HAVE_STDIO_H */
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298
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299 /* Functions to read/write memory pointers */
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300
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301 static int SDLCALL mem_seek(SDL_RWops *context, int offset, int whence)
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302 {
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303 Uint8 *newpos;
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304
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305 switch (whence) {
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306 case RW_SEEK_SET:
0
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307 newpos = context->hidden.mem.base+offset;
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308 break;
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309 case RW_SEEK_CUR:
0
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310 newpos = context->hidden.mem.here+offset;
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311 break;
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312 case RW_SEEK_END:
0
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313 newpos = context->hidden.mem.stop+offset;
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314 break;
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315 default:
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316 SDL_SetError("Unknown value for 'whence'");
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317 return(-1);
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318 }
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319 if ( newpos < context->hidden.mem.base ) {
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320 newpos = context->hidden.mem.base;
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diff changeset
321 }
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322 if ( newpos > context->hidden.mem.stop ) {
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diff changeset
323 newpos = context->hidden.mem.stop;
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diff changeset
324 }
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325 context->hidden.mem.here = newpos;
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326 return(context->hidden.mem.here-context->hidden.mem.base);
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327 }
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diff changeset
328 static int SDLCALL mem_read(SDL_RWops *context, void *ptr, int size, int maxnum)
0
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329 {
1456
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diff changeset
330 size_t total_bytes;
84de7511f79f Fixed a bunch of 64-bit compatibility problems
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diff changeset
331 size_t mem_available;
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332
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333 total_bytes = (maxnum * size);
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
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diff changeset
334 if ( (maxnum <= 0) || (size <= 0) || ((total_bytes / maxnum) != (size_t) size) ) {
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335 return 0;
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336 }
0
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diff changeset
337
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diff changeset
338 mem_available = (context->hidden.mem.stop - context->hidden.mem.here);
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339 if (total_bytes > mem_available) {
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340 total_bytes = mem_available;
0
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diff changeset
341 }
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342
1336
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343 SDL_memcpy(ptr, context->hidden.mem.here, total_bytes);
1078
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344 context->hidden.mem.here += total_bytes;
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345
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346 return (total_bytes / size);
0
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diff changeset
347 }
1769
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diff changeset
348 static int SDLCALL mem_write(SDL_RWops *context, const void *ptr, int size, int num)
0
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349 {
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350 if ( (context->hidden.mem.here + (num*size)) > context->hidden.mem.stop ) {
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351 num = (context->hidden.mem.stop-context->hidden.mem.here)/size;
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352 }
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353 SDL_memcpy(context->hidden.mem.here, ptr, num*size);
0
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354 context->hidden.mem.here += num*size;
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355 return(num);
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diff changeset
356 }
1769
290b5baf2fca Fixed bug #215
Sam Lantinga <slouken@libsdl.org>
parents: 1465
diff changeset
357 static int SDLCALL mem_writeconst(SDL_RWops *context, const void *ptr, int size, int num)
764
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
358 {
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
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diff changeset
359 SDL_SetError("Can't write to read-only memory");
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
360 return(-1);
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
361 }
1769
290b5baf2fca Fixed bug #215
Sam Lantinga <slouken@libsdl.org>
parents: 1465
diff changeset
362 static int SDLCALL mem_close(SDL_RWops *context)
0
74212992fb08 Initial revision
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parents:
diff changeset
363 {
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parents:
diff changeset
364 if ( context ) {
1202
0748fbb272e7 Matched SDL_AllowRW and SDL_FreeRW calls in SDL_rwops.c ...
Ryan C. Gordon <icculus@icculus.org>
parents: 1078
diff changeset
365 SDL_FreeRW(context);
0
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parents:
diff changeset
366 }
74212992fb08 Initial revision
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diff changeset
367 return(0);
74212992fb08 Initial revision
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parents:
diff changeset
368 }
74212992fb08 Initial revision
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parents:
diff changeset
369
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diff changeset
370
0
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diff changeset
371 /* Functions to create SDL_RWops structures from various data sources */
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parents:
diff changeset
372
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
373 #ifdef __MACOS__
0
74212992fb08 Initial revision
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parents:
diff changeset
374 /*
74212992fb08 Initial revision
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parents:
diff changeset
375 * translate unix-style slash-separated filename to mac-style colon-separated
74212992fb08 Initial revision
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parents:
diff changeset
376 * name; return malloced string
74212992fb08 Initial revision
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parents:
diff changeset
377 */
74212992fb08 Initial revision
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parents:
diff changeset
378 static char *unix_to_mac(const char *file)
74212992fb08 Initial revision
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parents:
diff changeset
379 {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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diff changeset
380 int flen = SDL_strlen(file);
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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diff changeset
381 char *path = SDL_malloc(flen + 2);
0
74212992fb08 Initial revision
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parents:
diff changeset
382 const char *src = file;
74212992fb08 Initial revision
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parents:
diff changeset
383 char *dst = path;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
384 if(*src == '/') {
74212992fb08 Initial revision
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parents:
diff changeset
385 /* really depends on filesystem layout, hope for the best */
74212992fb08 Initial revision
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parents:
diff changeset
386 src++;
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parents:
diff changeset
387 } else {
74212992fb08 Initial revision
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parents:
diff changeset
388 /* Check if this is a MacOS path to begin with */
74212992fb08 Initial revision
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parents:
diff changeset
389 if(*src != ':')
74212992fb08 Initial revision
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parents:
diff changeset
390 *dst++ = ':'; /* relative paths begin with ':' */
74212992fb08 Initial revision
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parents:
diff changeset
391 }
74212992fb08 Initial revision
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parents:
diff changeset
392 while(src < file + flen) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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parents: 1330
diff changeset
393 const char *end = SDL_strchr(src, '/');
0
74212992fb08 Initial revision
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parents:
diff changeset
394 int len;
74212992fb08 Initial revision
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parents:
diff changeset
395 if(!end)
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parents:
diff changeset
396 end = file + flen; /* last component */
74212992fb08 Initial revision
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parents:
diff changeset
397 len = end - src;
74212992fb08 Initial revision
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parents:
diff changeset
398 if(len == 0 || (len == 1 && src[0] == '.')) {
74212992fb08 Initial revision
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parents:
diff changeset
399 /* remove repeated slashes and . */
74212992fb08 Initial revision
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parents:
diff changeset
400 } else {
74212992fb08 Initial revision
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parents:
diff changeset
401 if(len == 2 && src[0] == '.' && src[1] == '.') {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 /* replace .. with the empty string */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 } else {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
404 SDL_memcpy(dst, src, len);
0
74212992fb08 Initial revision
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parents:
diff changeset
405 dst += len;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 }
74212992fb08 Initial revision
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parents:
diff changeset
407 if(end < file + flen)
74212992fb08 Initial revision
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parents:
diff changeset
408 *dst++ = ':';
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 src = end + 1;
74212992fb08 Initial revision
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parents:
diff changeset
411 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412 *dst++ = '\0';
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 return path;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 }
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
415 #endif /* __MACOS__ */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 SDL_RWops *SDL_RWFromFile(const char *file, const char *mode)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 {
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
419 SDL_RWops *rwops = NULL;
1465
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
420 #ifdef HAVE_STDIO_H
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
421 FILE *fp = NULL;
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
Sam Lantinga <slouken@libsdl.org>
parents: 1456
diff changeset
422 #endif
1455
f487bb150acc Hah, standard stdio code crashed on the test case.
Sam Lantinga <slouken@libsdl.org>
parents: 1453
diff changeset
423 if ( !file || !*file || !mode || !*mode ) {
f487bb150acc Hah, standard stdio code crashed on the test case.
Sam Lantinga <slouken@libsdl.org>
parents: 1453
diff changeset
424 SDL_SetError("SDL_RWFromFile(): No file or no mode specified");
f487bb150acc Hah, standard stdio code crashed on the test case.
Sam Lantinga <slouken@libsdl.org>
parents: 1453
diff changeset
425 return NULL;
f487bb150acc Hah, standard stdio code crashed on the test case.
Sam Lantinga <slouken@libsdl.org>
parents: 1453
diff changeset
426 }
f487bb150acc Hah, standard stdio code crashed on the test case.
Sam Lantinga <slouken@libsdl.org>
parents: 1453
diff changeset
427
3975
e85e65aec22f Added S60 port.
Ryan C. Gordon <icculus@icculus.org>
parents: 1769
diff changeset
428 #if defined(__WIN32__) && !defined(__SYMBIAN32__)
1447
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
429 rwops = SDL_AllocRW();
1453
2eb75f8a32ca Date: Mon, 27 Feb 2006 17:01:43 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1447
diff changeset
430 if (!rwops)
2eb75f8a32ca Date: Mon, 27 Feb 2006 17:01:43 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1447
diff changeset
431 return NULL; /* SDL_SetError already setup by SDL_AllocRW() */
4038
eeb0862b9697 Simplified Win32 file opening code
Sam Lantinga <slouken@libsdl.org>
parents: 4035
diff changeset
432 if (win32_file_open(rwops,file,mode) < 0) {
1447
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
433 SDL_FreeRW(rwops);
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
434 return NULL;
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
435 }
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
436 rwops->seek = win32_file_seek;
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
437 rwops->read = win32_file_read;
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
438 rwops->write = win32_file_write;
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
439 rwops->close = win32_file_close;
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
440
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
441 #elif HAVE_STDIO_H
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
443 #ifdef __MACOS__
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 char *mpath = unix_to_mac(file);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 fp = fopen(mpath, mode);
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
447 SDL_free(mpath);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 fp = fopen(file, mode);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 if ( fp == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 SDL_SetError("Couldn't open %s", file);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 rwops = SDL_RWFromFP(fp, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 }
1447
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
457 #else
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
458 SDL_SetError("SDL not compiled with stdio support");
1446
47bf1767c4ca Date: Mon, 27 Feb 2006 02:17:29 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
459 #endif /* !HAVE_STDIO_H */
1447
515df0086eb7 Prefer the raw Win32 API over stdio for file RWops
Sam Lantinga <slouken@libsdl.org>
parents: 1446
diff changeset
460
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 return(rwops);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
464 #ifdef HAVE_STDIO_H
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 SDL_RWops *SDL_RWFromFP(FILE *fp, int autoclose)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 {
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
467 SDL_RWops *rwops = NULL;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 rwops = SDL_AllocRW();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 if ( rwops != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 rwops->seek = stdio_seek;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 rwops->read = stdio_read;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 rwops->write = stdio_write;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 rwops->close = stdio_close;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 rwops->hidden.stdio.fp = fp;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 rwops->hidden.stdio.autoclose = autoclose;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 return(rwops);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 }
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
480 #endif /* HAVE_STDIO_H */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 SDL_RWops *SDL_RWFromMem(void *mem, int size)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 SDL_RWops *rwops;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 rwops = SDL_AllocRW();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 if ( rwops != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 rwops->seek = mem_seek;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489 rwops->read = mem_read;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 rwops->write = mem_write;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 rwops->close = mem_close;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 rwops->hidden.mem.base = (Uint8 *)mem;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
493 rwops->hidden.mem.here = rwops->hidden.mem.base;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 rwops->hidden.mem.stop = rwops->hidden.mem.base+size;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 return(rwops);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498
764
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
499 SDL_RWops *SDL_RWFromConstMem(const void *mem, int size)
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
500 {
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
501 SDL_RWops *rwops;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
502
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
503 rwops = SDL_AllocRW();
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
504 if ( rwops != NULL ) {
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
505 rwops->seek = mem_seek;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
506 rwops->read = mem_read;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
507 rwops->write = mem_writeconst;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
508 rwops->close = mem_close;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
509 rwops->hidden.mem.base = (Uint8 *)mem;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
510 rwops->hidden.mem.here = rwops->hidden.mem.base;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
511 rwops->hidden.mem.stop = rwops->hidden.mem.base+size;
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
512 }
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
513 return(rwops);
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
514 }
974c0fb74bf8 Added function to create RWops from const memory: SDL_RWFromConstMem()
Sam Lantinga <slouken@libsdl.org>
parents: 543
diff changeset
515
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 SDL_RWops *SDL_AllocRW(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518 SDL_RWops *area;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
520 area = (SDL_RWops *)SDL_malloc(sizeof *area);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521 if ( area == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
522 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
523 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524 return(area);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 void SDL_FreeRW(SDL_RWops *area)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528 {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
529 SDL_free(area);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 }
1354
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
531
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
532 /* Functions for dynamically reading and writing endian-specific values */
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
533
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
534 Uint16 SDL_ReadLE16 (SDL_RWops *src)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
535 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
536 Uint16 value;
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
537
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
538 SDL_RWread(src, &value, (sizeof value), 1);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
539 return(SDL_SwapLE16(value));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
540 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
541 Uint16 SDL_ReadBE16 (SDL_RWops *src)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
542 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
543 Uint16 value;
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
544
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
545 SDL_RWread(src, &value, (sizeof value), 1);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
546 return(SDL_SwapBE16(value));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
547 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
548 Uint32 SDL_ReadLE32 (SDL_RWops *src)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
549 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
550 Uint32 value;
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
551
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
552 SDL_RWread(src, &value, (sizeof value), 1);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
553 return(SDL_SwapLE32(value));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
554 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
555 Uint32 SDL_ReadBE32 (SDL_RWops *src)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
556 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
557 Uint32 value;
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
558
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
559 SDL_RWread(src, &value, (sizeof value), 1);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
560 return(SDL_SwapBE32(value));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
561 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
562 Uint64 SDL_ReadLE64 (SDL_RWops *src)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
563 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
564 Uint64 value;
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
565
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
566 SDL_RWread(src, &value, (sizeof value), 1);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
567 return(SDL_SwapLE64(value));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
568 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
569 Uint64 SDL_ReadBE64 (SDL_RWops *src)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
570 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
571 Uint64 value;
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
572
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
573 SDL_RWread(src, &value, (sizeof value), 1);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
574 return(SDL_SwapBE64(value));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
575 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
576
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
577 int SDL_WriteLE16 (SDL_RWops *dst, Uint16 value)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
578 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
579 value = SDL_SwapLE16(value);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
580 return(SDL_RWwrite(dst, &value, (sizeof value), 1));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
581 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
582 int SDL_WriteBE16 (SDL_RWops *dst, Uint16 value)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
583 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
584 value = SDL_SwapBE16(value);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
585 return(SDL_RWwrite(dst, &value, (sizeof value), 1));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
586 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
587 int SDL_WriteLE32 (SDL_RWops *dst, Uint32 value)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
588 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
589 value = SDL_SwapLE32(value);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
590 return(SDL_RWwrite(dst, &value, (sizeof value), 1));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
591 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
592 int SDL_WriteBE32 (SDL_RWops *dst, Uint32 value)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
593 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
594 value = SDL_SwapBE32(value);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
595 return(SDL_RWwrite(dst, &value, (sizeof value), 1));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
596 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
597 int SDL_WriteLE64 (SDL_RWops *dst, Uint64 value)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
598 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
599 value = SDL_SwapLE64(value);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
600 return(SDL_RWwrite(dst, &value, (sizeof value), 1));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
601 }
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
602 int SDL_WriteBE64 (SDL_RWops *dst, Uint64 value)
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
603 {
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
604 value = SDL_SwapBE64(value);
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
605 return(SDL_RWwrite(dst, &value, (sizeof value), 1));
22f39393668a Fixed build problem with SDL_string.c
Sam Lantinga <slouken@libsdl.org>
parents: 1338
diff changeset
606 }