Mercurial > sdl-ios-xcode
annotate docs/html/sdlcdstatus.html @ 4327:2b6e3b42f80f SDL-1.2
Simplify and improve dynamic library detection, taken from SDL_image
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 13 Oct 2009 05:20:09 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_CDStatus</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="CD-ROM" | |
| 14 HREF="cdrom.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_CDOpen" | |
| 17 HREF="sdlcdopen.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CDPlay" | |
| 20 HREF="sdlcdplay.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
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31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
| 48 HREF="sdlcdopen.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 ></TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="sdlcdplay.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><H1 | |
| 72 ><A | |
| 73 NAME="SDLCDSTATUS" | |
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74 ></A |
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75 >SDL_CDStatus</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN7308" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_CDStatus -- Returns the current status of the given drive.</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN7311" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN7312" |
| 0 | 95 ></A |
| 96 ><P | |
| 97 ></P | |
| 98 ><PRE | |
| 99 CLASS="FUNCSYNOPSISINFO" | |
| 100 >#include "SDL.h"</PRE | |
| 101 ><P | |
| 102 ><CODE | |
| 103 ><CODE | |
| 104 CLASS="FUNCDEF" | |
| 105 >CDstatus <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_CDStatus</B | |
| 108 ></CODE | |
| 109 >(SDL_CD *cdrom);</CODE | |
| 110 ></P | |
| 111 ><PRE | |
| 112 CLASS="FUNCSYNOPSISINFO" | |
| 113 >/* Given a status, returns true if there's a disk in the drive */ | |
| 114 #define CD_INDRIVE(status) ((int)status > 0)</PRE | |
| 115 ><P | |
| 116 ></P | |
| 117 ></DIV | |
| 118 ></DIV | |
| 119 ><DIV | |
| 120 CLASS="REFSECT1" | |
| 121 ><A | |
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122 NAME="AEN7319" |
| 0 | 123 ></A |
| 124 ><H2 | |
| 125 >Description</H2 | |
| 126 ><P | |
| 127 >This function returns the current status of the given drive. Status is described like so: | |
| 128 <PRE | |
| 129 CLASS="PROGRAMLISTING" | |
| 130 >typedef enum { | |
| 131 CD_TRAYEMPTY, | |
| 132 CD_STOPPED, | |
| 133 CD_PLAYING, | |
| 134 CD_PAUSED, | |
| 135 CD_ERROR = -1 | |
| 136 } CDstatus;</PRE | |
| 137 ></P | |
| 138 ><P | |
| 139 >If the drive has a CD in it, the table of contents of the CD and current | |
| 140 play position of the CD will be stored in the SDL_CD structure.</P | |
| 141 ><P | |
| 142 >The macro <TT | |
| 143 CLASS="LITERAL" | |
| 144 >CD_INDRIVE</TT | |
| 145 > is provided for convenience, | |
| 146 and given a status returns true if there's a disk in the drive.</P | |
| 147 ><DIV | |
| 148 CLASS="NOTE" | |
| 149 ><BLOCKQUOTE | |
| 150 CLASS="NOTE" | |
| 151 ><P | |
| 152 ><B | |
| 153 >Note: </B | |
| 154 ><TT | |
| 155 CLASS="FUNCTION" | |
| 156 >SDL_CDStatus</TT | |
| 157 > also updates the <A | |
| 158 HREF="sdlcd.html" | |
| 159 ><SPAN | |
| 160 CLASS="STRUCTNAME" | |
| 161 >SDL_CD</SPAN | |
| 162 ></A | |
| 163 > structure passed to it.</P | |
| 164 ></BLOCKQUOTE | |
| 165 ></DIV | |
| 166 ></DIV | |
| 167 ><DIV | |
| 168 CLASS="REFSECT1" | |
| 169 ><A | |
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170 NAME="AEN7331" |
| 0 | 171 ></A |
| 172 ><H2 | |
| 173 >Example</H2 | |
| 174 ><PRE | |
| 175 CLASS="PROGRAMLISTING" | |
| 176 >int playTrack(int track) | |
| 177 { | |
| 178 int playing = 0; | |
| 179 | |
| 180 if ( CD_INDRIVE(SDL_CDStatus(cdrom)) ) { | |
| 181 /* clamp to the actual number of tracks on the CD */ | |
| 182 if (track >= cdrom->numtracks) { | |
| 183 track = cdrom->numtracks-1; | |
| 184 } | |
| 185 | |
| 186 if ( SDL_CDPlayTracks(cdrom, track, 0, 1, 0) == 0 ) { | |
| 187 playing = 1; | |
| 188 } | |
| 189 } | |
| 190 return playing; | |
| 191 }</PRE | |
| 192 ></DIV | |
| 193 ><DIV | |
| 194 CLASS="REFSECT1" | |
| 195 ><A | |
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parents:
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196 NAME="AEN7334" |
| 0 | 197 ></A |
| 198 ><H2 | |
| 199 >See Also</H2 | |
| 200 ><P | |
| 201 ><A | |
| 202 HREF="sdlcd.html" | |
| 203 ><TT | |
| 204 CLASS="FUNCTION" | |
| 205 >SDL_CD</TT | |
| 206 ></A | |
| 207 ></P | |
| 208 ></DIV | |
| 209 ><DIV | |
| 210 CLASS="NAVFOOTER" | |
| 211 ><HR | |
| 212 ALIGN="LEFT" | |
| 213 WIDTH="100%"><TABLE | |
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parents:
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214 SUMMARY="Footer navigation table" |
| 0 | 215 WIDTH="100%" |
| 216 BORDER="0" | |
| 217 CELLPADDING="0" | |
| 218 CELLSPACING="0" | |
| 219 ><TR | |
| 220 ><TD | |
| 221 WIDTH="33%" | |
| 222 ALIGN="left" | |
| 223 VALIGN="top" | |
| 224 ><A | |
| 225 HREF="sdlcdopen.html" | |
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parents:
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226 ACCESSKEY="P" |
| 0 | 227 >Prev</A |
| 228 ></TD | |
| 229 ><TD | |
| 230 WIDTH="34%" | |
| 231 ALIGN="center" | |
| 232 VALIGN="top" | |
| 233 ><A | |
| 234 HREF="index.html" | |
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parents:
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235 ACCESSKEY="H" |
| 0 | 236 >Home</A |
| 237 ></TD | |
| 238 ><TD | |
| 239 WIDTH="33%" | |
| 240 ALIGN="right" | |
| 241 VALIGN="top" | |
| 242 ><A | |
| 243 HREF="sdlcdplay.html" | |
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355632dca928
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parents:
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diff
changeset
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244 ACCESSKEY="N" |
| 0 | 245 >Next</A |
| 246 ></TD | |
| 247 ></TR | |
| 248 ><TR | |
| 249 ><TD | |
| 250 WIDTH="33%" | |
| 251 ALIGN="left" | |
| 252 VALIGN="top" | |
| 253 >SDL_CDOpen</TD | |
| 254 ><TD | |
| 255 WIDTH="34%" | |
| 256 ALIGN="center" | |
| 257 VALIGN="top" | |
| 258 ><A | |
| 259 HREF="cdrom.html" | |
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parents:
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260 ACCESSKEY="U" |
| 0 | 261 >Up</A |
| 262 ></TD | |
| 263 ><TD | |
| 264 WIDTH="33%" | |
| 265 ALIGN="right" | |
| 266 VALIGN="top" | |
| 267 >SDL_CDPlay</TD | |
| 268 ></TR | |
| 269 ></TABLE | |
| 270 ></DIV | |
| 271 ></BODY | |
| 272 ></HTML | |
| 273 > |