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annotate src/cdrom/beos/SDL_syscdrom.cc @ 1668:4da1ee79c9af SDL-1.3

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more tweaking indent options
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 04:04:35 +0000
parents 782fd950bd46
children
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 #ifdef SDL_CDROM_BEOS
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25
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26 /* Functions for system-level CD-ROM audio control on BeOS
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27 (not completely implemented yet)
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28 */
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29
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30 #include <sys/types.h>
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31 #include <sys/stat.h>
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32 #include <unistd.h>
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33
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34 #include <scsi.h>
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35 #include <Directory.h>
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36 #include <Entry.h>
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37 #include <Path.h>
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38
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39 #include "SDL_cdrom.h"
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40 extern "C"
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41 {
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42 #include "../SDL_syscdrom.h"
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43 }
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44
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45 /* Constants to help us get at the SCSI table-of-contents info */
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46 #define CD_NUMTRACKS(toc) toc.toc_data[3]
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47 #define CD_TRACK(toc, track) (&toc.toc_data[6+(track)*8])
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48 #define CD_TRACK_N(toc, track) CD_TRACK(toc, track)[0]
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49 #define CD_TRACK_M(toc, track) CD_TRACK(toc, track)[3]
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50 #define CD_TRACK_S(toc, track) CD_TRACK(toc, track)[4]
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51 #define CD_TRACK_F(toc, track) CD_TRACK(toc, track)[5]
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52
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53 /* Constants to help us get at the SCSI position info */
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54 #define POS_TRACK(pos) pos.position[6]
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55 #define POS_ABS_M(pos) pos.position[9]
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56 #define POS_ABS_S(pos) pos.position[10]
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57 #define POS_ABS_F(pos) pos.position[11]
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58 #define POS_REL_M(pos) pos.position[13]
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59 #define POS_REL_S(pos) pos.position[14]
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60 #define POS_REL_F(pos) pos.position[15]
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61
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62 /* The maximum number of CD-ROM drives we'll detect */
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63 #define MAX_DRIVES 16
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64
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65 /* A list of available CD-ROM drives */
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66 static char *SDL_cdlist[MAX_DRIVES];
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67
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68 /* The system-dependent CD control functions */
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69 static const char *SDL_SYS_CDName(int drive);
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70 static int SDL_SYS_CDOpen(int drive);
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71 static int SDL_SYS_CDGetTOC(SDL_CD * cdrom);
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72 static CDstatus SDL_SYS_CDStatus(SDL_CD * cdrom, int *position);
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73 static int SDL_SYS_CDPlay(SDL_CD * cdrom, int start, int length);
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74 static int SDL_SYS_CDPause(SDL_CD * cdrom);
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75 static int SDL_SYS_CDResume(SDL_CD * cdrom);
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76 static int SDL_SYS_CDStop(SDL_CD * cdrom);
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77 static int SDL_SYS_CDEject(SDL_CD * cdrom);
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78 static void SDL_SYS_CDClose(SDL_CD * cdrom);
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79 int try_dir(const char *directory);
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80
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81
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82 /* Check a drive to see if it is a CD-ROM */
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83 static int
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84 CheckDrive(char *drive)
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85 {
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86 struct stat stbuf;
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87 int is_cd, cdfd;
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88 device_geometry info;
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89
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90 /* If it doesn't exist, return -1 */
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91 if (stat(drive, &stbuf) < 0) {
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92 return (-1);
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93 }
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94
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95 /* If it does exist, verify that it's an available CD-ROM */
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96 is_cd = 0;
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97 cdfd = open(drive, 0);
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98 if (cdfd >= 0) {
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99 if (ioctl(cdfd, B_GET_GEOMETRY, &info) == B_NO_ERROR) {
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100 if (info.device_type == B_CD) {
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101 is_cd = 1;
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102 }
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103 }
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104 close(cdfd);
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105 } else {
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106 /* This can happen when the drive is open .. (?) */ ;
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107 is_cd = 1;
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108 }
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109 return (is_cd);
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110 }
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111
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112 /* Add a CD-ROM drive to our list of valid drives */
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113 static void
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114 AddDrive(char *drive)
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115 {
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116 int i;
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117 size_t len;
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118
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119 if (SDL_numcds < MAX_DRIVES) {
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120 /* Add this drive to our list */
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121 i = SDL_numcds;
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122 len = SDL_strlen(drive) + 1;
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123 SDL_cdlist[i] = (char *) SDL_malloc(len);
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124 if (SDL_cdlist[i] == NULL) {
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125 SDL_OutOfMemory();
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126 return;
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127 }
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128 SDL_strlcpy(SDL_cdlist[i], drive, len);
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129 ++SDL_numcds;
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130 #ifdef CDROM_DEBUG
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131 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
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132 #endif
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133 }
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134 }
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135
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136 /* IDE bus scanning magic */
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137 enum
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138 {
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139 IDE_GET_DEVICES_INFO = B_DEVICE_OP_CODES_END + 50,
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140 };
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141 struct ide_ctrl_info
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142 {
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143 bool ide_0_present;
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144 bool ide_0_master_present;
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145 bool ide_0_slave_present;
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146 int ide_0_master_type;
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147 int ide_0_slave_type;
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148 bool ide_1_present;
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149 bool ide_1_master_present;
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150 bool ide_1_slave_present;
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151 int ide_1_master_type;
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152 int ide_1_slave_type;
153
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153 };
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154
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155 int
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156 SDL_SYS_CDInit(void)
153
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157 {
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158 char *SDLcdrom;
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159 int raw_fd;
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160 struct ide_ctrl_info info;
153
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161
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162 /* Fill in our driver capabilities */
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163 SDL_CDcaps.Name = SDL_SYS_CDName;
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164 SDL_CDcaps.Open = SDL_SYS_CDOpen;
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165 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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166 SDL_CDcaps.Status = SDL_SYS_CDStatus;
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167 SDL_CDcaps.Play = SDL_SYS_CDPlay;
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168 SDL_CDcaps.Pause = SDL_SYS_CDPause;
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169 SDL_CDcaps.Resume = SDL_SYS_CDResume;
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170 SDL_CDcaps.Stop = SDL_SYS_CDStop;
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171 SDL_CDcaps.Eject = SDL_SYS_CDEject;
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172 SDL_CDcaps.Close = SDL_SYS_CDClose;
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173
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174 /* Look in the environment for our CD-ROM drive list */
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175 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */
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176 if (SDLcdrom != NULL) {
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177 char *cdpath, *delim;
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178 size_t len = SDL_strlen(SDLcdrom) + 1;
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179 cdpath = SDL_stack_alloc(char, len);
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180 if (cdpath != NULL) {
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181 SDL_strlcpy(cdpath, SDLcdrom, len);
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182 SDLcdrom = cdpath;
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183 do {
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184 delim = SDL_strchr(SDLcdrom, ':');
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185 if (delim) {
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186 *delim++ = '\0';
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187 }
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188 if (CheckDrive(SDLcdrom) > 0) {
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189 AddDrive(SDLcdrom);
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190 }
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191 if (delim) {
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192 SDLcdrom = delim;
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193 } else {
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194 SDLcdrom = NULL;
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195 }
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196 }
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197 while (SDLcdrom);
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198 SDL_stack_free(cdpath);
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199 }
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200
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201 /* If we found our drives, there's nothing left to do */
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202 if (SDL_numcds > 0) {
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203 return (0);
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204 }
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205 }
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206
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207 /* Scan the system for CD-ROM drives */
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208 try_dir("/dev/disk");
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209 return 0;
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210 }
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211
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212
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213 int
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214 try_dir(const char *directory)
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215 {
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216 BDirectory dir;
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217 dir.SetTo(directory);
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218 if (dir.InitCheck() != B_NO_ERROR) {
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219 return false;
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220 }
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221 dir.Rewind();
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222 BEntry entry;
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223 while (dir.GetNextEntry(&entry) >= 0) {
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224 BPath path;
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225 const char *name;
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226 entry_ref e;
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227
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228 if (entry.GetPath(&path) != B_NO_ERROR)
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229 continue;
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230 name = path.Path();
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231
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232 if (entry.GetRef(&e) != B_NO_ERROR)
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233 continue;
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234
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235 if (entry.IsDirectory()) {
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236 if (SDL_strcmp(e.name, "floppy") == 0)
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237 continue; /* ignore floppy (it is not silent) */
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238 int devfd = try_dir(name);
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239 if (devfd >= 0)
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240 return devfd;
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241 } else {
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242 int devfd;
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243 device_geometry g;
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244
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245 if (SDL_strcmp(e.name, "raw") != 0)
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246 continue; /* ignore partitions */
153
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247
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248 devfd = open(name, O_RDONLY);
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249 if (devfd < 0)
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250 continue;
153
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251
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252 if (ioctl(devfd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0) {
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253 if (g.device_type == B_CD) {
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254 AddDrive(strdup(name));
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255 }
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256 }
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257 close(devfd);
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258 }
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259 }
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260 return B_ERROR;
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261 }
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262
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263
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264 /* General ioctl() CD-ROM command function */
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265 static int
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266 SDL_SYS_CDioctl(int index, int command, void *arg)
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267 {
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268 int okay;
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269 int fd;
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270
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271 okay = 0;
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272 fd = open(SDL_cdlist[index], 0);
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273 if (fd >= 0) {
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274 if (ioctl(fd, command, arg) == B_NO_ERROR) {
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275 okay = 1;
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276 }
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277 close(fd);
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278 }
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279 return (okay ? 0 : -1);
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280 }
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281
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282 static const char *
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283 SDL_SYS_CDName(int drive)
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284 {
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285 return (SDL_cdlist[drive]);
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286 }
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287
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288 static int
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289 SDL_SYS_CDOpen(int drive)
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290 {
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291 return (drive);
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292 }
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293
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294 static int
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295 SDL_SYS_CDGetTOC(SDL_CD * cdrom)
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296 {
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297 int i;
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298 scsi_toc toc;
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299
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300 if (SDL_SYS_CDioctl(cdrom->id, B_SCSI_GET_TOC, &toc) == 0) {
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301 cdrom->numtracks = CD_NUMTRACKS(toc);
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302 if (cdrom->numtracks > SDL_MAX_TRACKS) {
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303 cdrom->numtracks = SDL_MAX_TRACKS;
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304 }
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305 for (i = 0; i <= cdrom->numtracks; ++i) {
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306 cdrom->track[i].id = CD_TRACK_N(toc, i);
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307 /* FIXME: How do we tell on BeOS? */
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308 cdrom->track[i].type = SDL_AUDIO_TRACK;
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309 cdrom->track[i].offset = MSF_TO_FRAMES(CD_TRACK_M(toc, i),
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310 CD_TRACK_S(toc, i),
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311 CD_TRACK_F(toc, i));
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312 cdrom->track[i].length = 0;
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313 if (i > 0) {
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314 cdrom->track[i - 1].length =
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315 cdrom->track[i].offset - cdrom->track[i - 1].offset;
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316 }
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317 }
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318 return (0);
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319 } else {
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320 return (-1);
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321 }
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322 }
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323
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324 /* Get CD-ROM status */
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325 static CDstatus
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326 SDL_SYS_CDStatus(SDL_CD * cdrom, int *position)
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327 {
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328 CDstatus status;
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329 int fd;
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330 int cur_frame;
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331 scsi_position pos;
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332
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333 fd = open(SDL_cdlist[cdrom->id], 0);
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334 cur_frame = 0;
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335 if (fd >= 0) {
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336 if (ioctl(fd, B_SCSI_GET_POSITION, &pos) == B_NO_ERROR) {
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337 cur_frame =
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338 MSF_TO_FRAMES(POS_ABS_M(pos), POS_ABS_S(pos), POS_ABS_F(pos));
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339 }
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340 if (!pos.position[1] || (pos.position[1] >= 0x13) ||
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341 ((pos.position[1] == 0x12) && (!pos.position[6]))) {
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342 status = CD_STOPPED;
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343 } else if (pos.position[1] == 0x11) {
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344 status = CD_PLAYING;
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345 } else {
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346 status = CD_PAUSED;
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347 }
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348 close(fd);
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349 } else {
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350 status = CD_TRAYEMPTY;
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351 }
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352 if (position) {
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353 *position = cur_frame;
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354 }
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355 return (status);
153
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356 }
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357
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358 /* Start play */
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359 static int
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360 SDL_SYS_CDPlay(SDL_CD * cdrom, int start, int length)
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361 {
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362 int okay;
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363 int fd;
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364 scsi_play_position pos;
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365
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366 okay = 0;
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367 fd = open(SDL_cdlist[cdrom->id], 0);
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368 if (fd >= 0) {
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369 FRAMES_TO_MSF(start, &pos.start_m, &pos.start_s, &pos.start_f);
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370 FRAMES_TO_MSF(start + length, &pos.end_m, &pos.end_s, &pos.end_f);
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371 if (ioctl(fd, B_SCSI_PLAY_POSITION, &pos) == B_NO_ERROR) {
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372 okay = 1;
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373 }
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374 close(fd);
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375 }
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376 return (okay ? 0 : -1);
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377 }
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378
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379 /* Pause play */
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380 static int
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381 SDL_SYS_CDPause(SDL_CD * cdrom)
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382 {
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383 return (SDL_SYS_CDioctl(cdrom->id, B_SCSI_PAUSE_AUDIO, 0));
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384 }
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385
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386 /* Resume play */
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387 static int
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388 SDL_SYS_CDResume(SDL_CD * cdrom)
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389 {
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390 return (SDL_SYS_CDioctl(cdrom->id, B_SCSI_RESUME_AUDIO, 0));
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391 }
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392
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393 /* Stop play */
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394 static int
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395 SDL_SYS_CDStop(SDL_CD * cdrom)
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396 {
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397 return (SDL_SYS_CDioctl(cdrom->id, B_SCSI_STOP_AUDIO, 0));
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398 }
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399
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400 /* Eject the CD-ROM */
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401 static int
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402 SDL_SYS_CDEject(SDL_CD * cdrom)
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403 {
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404 return (SDL_SYS_CDioctl(cdrom->id, B_SCSI_EJECT, 0));
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405 }
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406
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407 /* Close the CD-ROM handle */
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408 static void
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409 SDL_SYS_CDClose(SDL_CD * cdrom)
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410 {
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411 close(cdrom->id);
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412 }
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413
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414 void
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415 SDL_SYS_CDQuit(void)
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416 {
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417 int i;
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418
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419 if (SDL_numcds > 0) {
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420 for (i = 0; i < SDL_numcds; ++i) {
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421 SDL_free(SDL_cdlist[i]);
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422 }
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423 SDL_numcds = 0;
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424 }
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425 }
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426
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427 #endif /* SDL_CDROM_BEOS */
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428 /* vi: set ts=4 sw=4 expandtab: */