rg_utils: Added rg_extension_match

components/retro-go/rg_utils.c

@@ -1,6 +1,7 @@
 #include "rg_system.h"
 #include "rg_utils.h"
 
+#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -57,18 +58,33 @@ const char *rg_basename(const char *path)
     return name ? name + 1 : path;
 }
 
-const char *rg_extension(const char *path)
+const char *rg_extension(const char *filename)
 {
-    if (!path)
+    if (!filename)
         return NULL;
 
-    const char *ptr = rg_basename(path);
+    const char *ptr = rg_basename(filename);
     const char *ext = strrchr(ptr, '.');
     if (!ext)
         return ptr + strlen(ptr);
     return ext + 1;
 }
 
+bool rg_extension_match(const char *filename, const char *extension)
+{
+    const char *fileext = rg_extension(filename);
+    if (!fileext || !extension)
+        return false;
+
+    while (*fileext && *extension)
+    {
+        if (toupper(*fileext++) != toupper(*extension++))
+            return false;
+    }
+
+    return *fileext == 0 && *extension == 0;
+}
+
 const char *rg_relpath(const char *path)
 {
     if (!path)

components/retro-go/rg_utils.h

@@ -61,7 +61,8 @@ char *rg_strtolower(char *str);
 char *rg_strtoupper(char *str);
 const char *rg_dirname(const char *path);
 const char *rg_basename(const char *path);
-const char *rg_extension(const char *path);
+const char *rg_extension(const char *filename);
+bool rg_extension_match(const char *filename, const char *extension);
 const char *rg_relpath(const char *path);
 uint32_t rg_crc32(uint32_t crc, const uint8_t *buf, size_t len);
 uint32_t rg_hash(const char *buf, size_t len);

fmsx/main/main.c

@@ -484,7 +484,7 @@ void app_main(void)
     };
     int argc = RG_COUNT(argv) - 3;
 
-    if (strcasecmp(rg_extension(app->romPath), "dsk") == 0)
+    if (rg_extension_match(app->romPath, "dsk"))
     {
         argv[argc++] = "-diska";
     }

retro-core/main/main_sms.c

@@ -118,7 +118,7 @@ void sms_main(void)
     option.extra_gg = 0;
     option.tms_pal = rg_settings_get_number(NS_APP, SETTING_PALETTE, 0);
 
-    if (strcmp(rg_extension(app->romPath), "sg") == 0)
+    if (rg_extension_match(app->romPath, "sg"))
         option.console = 5;
     else if (strcmp(app->configNs, "col") == 0)
         option.console = 6;