diff options
Diffstat (limited to 'driver.c')
-rw-r--r-- | driver.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/driver.c b/driver.c new file mode 100644 index 000000000..e8bd81c8f --- /dev/null +++ b/driver.c @@ -0,0 +1,133 @@ +#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); + } + } +} |