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/* $Id$ */
#include "stdafx.h"
#include "openttd.h"
#include "driver.h"
#include "functions.h"
#include "hal.h"
#include "string.h"
typedef struct {
const DriverDesc *descs;
const char *name;
void *var;
} DriverClass;
static DriverClass _driver_classes[] = {
{_video_driver_descs, "video", &_video_driver},
{_sound_driver_descs, "sound", &_sound_driver},
{_music_driver_descs, "music", &_music_driver},
};
enum {
DF_PRIORITY_MASK = 0xF,
};
static const DriverDesc* GetDriverByName(const DriverDesc* dd, const char* name)
{
for (; dd->name != NULL; dd++) {
if (strcmp(dd->name, name) == 0) return dd;
}
return NULL;
}
static const DriverDesc* ChooseDefaultDriver(const DriverDesc* dd)
{
byte os_version = GetOSVersion();
const DriverDesc *best = NULL;
int best_pri = -1;
for (; dd->name != NULL; dd++) {
if ((int)(dd->flags & DF_PRIORITY_MASK) > best_pri && os_version >= (byte)dd->flags) {
best_pri = dd->flags & DF_PRIORITY_MASK;
best = dd;
}
}
return best;
}
void LoadDriver(int driver, const char *name)
{
const DriverClass *dc = &_driver_classes[driver];
const DriverDesc *dd;
const void **var;
const void *drv;
const char *err;
char *parm;
char buffer[256];
const char *parms[32];
parms[0] = NULL;
if (!*name) {
dd = ChooseDefaultDriver(dc->descs);
} else {
// Extract the driver name and put parameter list in parm
ttd_strlcpy(buffer, name, sizeof(buffer));
parm = strchr(buffer, ':');
if (parm) {
uint np = 0;
// Tokenize the parm.
do {
*parm++ = 0;
if (np < lengthof(parms) - 1)
parms[np++] = parm;
while (*parm != 0 && *parm != ',')
parm++;
} while (*parm == ',');
parms[np] = NULL;
}
dd = GetDriverByName(dc->descs, buffer);
if (dd == NULL)
error("No such %s driver: %s\n", dc->name, buffer);
}
var = dc->var;
if (*var != NULL) ((const HalCommonDriver*)*var)->stop();
*var = NULL;
drv = dd->drv;
err = ((const HalCommonDriver*)drv)->start(parms);
if (err != NULL)
error("Unable to load driver %s(%s). The error was: %s\n", dd->name, dd->longname, err);
*var = drv;
}
static const char* GetDriverParam(const char* const* parm, const char* name)
{
uint len = strlen(name);
for (; *parm != NULL; parm++) {
const char* p = *parm;
if (strncmp(p, name, len) == 0) {
if (p[len] == '=') return p + len + 1;
if (p[len] == '\0') return p + len;
}
}
return NULL;
}
bool GetDriverParamBool(const char* const* parm, const char* name)
{
return GetDriverParam(parm, name) != NULL;
}
int GetDriverParamInt(const char* const* parm, const char* name, int def)
{
const char* p = GetDriverParam(parm, name);
return p != NULL ? atoi(p) : def;
}
void GetDriverList(char* p)
{
const DriverClass* dc;
for (dc = _driver_classes; dc != endof(_driver_classes); dc++) {
const DriverDesc* dd;
p += sprintf(p, "List of %s drivers:\n", dc->name);
for (dd = dc->descs; dd->name != NULL; dd++) {
p += sprintf(p, "%10s: %s\n", dd->name, dd->longname);
}
}
}
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