static void ensureConfig()
{
if(!g_config)
{
g_config = new MediaConfiguration;
*g_config = getDefaultConfiguration();
}
}
ConfigurationInstance::ConfigurationInstance(
boost::optional<std::string> const &customPath)
: instanceHandle(getConfigurationIdentifier(),
getDefaultConfiguration(), customPath)
{
}
/* ParseConfigurationFile - parse a configuration file */
BoardConfig *BoardConfig::parseConfigurationFile(const char *name)
{
char path[PATH_MAX];
BoardConfig *baseConfig, *config;
const char *src;
char *tag, *dst;
LineBuf buf;
FILE *fp;
int ch;
/* make a local copy of the name in lowercase */
src = name; dst = path;
while ((*dst++ = tolower(*src++)) != '\0')
;
/* check for a request for the default configuration */
if (strcmp(path, DEF_BOARD) == 0)
return getDefaultConfiguration();
/* make the configuration file name */
strcat(path, ".cfg");
/* open the configuration file */
if (!(fp = fopen(path, "r")))
return NULL;
/* create a new board configuration */
baseConfig = config = newBoardConfig(getDefaultConfiguration(), name);
/* initialize the line number */
buf.lineNumber = 0;
/* process each line in the configuration file */
while (fgets(buf.lineBuf, sizeof(buf.lineBuf), fp)) {
char *p;
int len;
/* check for a comment at the end of the line */
if ((p = strchr(buf.lineBuf, '#')) != NULL)
*p = '\0';
/* trim any trailing newline and spaces */
for (len = strlen(buf.lineBuf); len > 0; --len)
if (!isspace(buf.lineBuf[len-1]))
break;
buf.lineBuf[len] = '\0';
/* initialize token parser */
buf.linePtr = buf.lineBuf;
++buf.lineNumber;
/* look for the first token on the line */
switch (SkipSpaces(&buf)) {
case '\0': /* blank line */
case '#': /* comment */
// ignore blank lines and comments
break;
case '[': /* configuration tag */
/* get the configuration name */
++buf.linePtr;
if (!(tag = NextToken(&buf, "]", &ch)))
ParseError(&buf, "missing configuration tag");
if (ch != ']') {
if (SkipSpaces(&buf) != ']')
ParseError(&buf, "missing close bracket after configuration tag");
++buf.linePtr;
}
if (SkipSpaces(&buf) != '\0')
ParseError(&buf, "missing end of line");
/* add a new board configuration */
config = newBoardConfig(baseConfig, tag);
break;
default: /* tag:value pair */
/* get the tag */
if (!(tag = NextToken(&buf, ":", &ch)))
ParseError(&buf, "missing tag");
/* check for the colon separator */
if (ch != ':') {
if (SkipSpaces(&buf) != ':')
ParseError(&buf, "missing colon");
++buf.linePtr;
}
/* skip leading spaces before the value */
SkipSpaces(&buf);
/* set the configuration value */
config->setConfigField(tag, buf.linePtr);
break;
}
}
/* close the board configuration file */
fclose(fp);
//DumpBoardConfiguration(baseConfig);
/* return the board configuration */
return baseConfig;
}
