ruapu_rua() returns all supported features (#52)

README.md

@@ -20,6 +20,14 @@ int main()
     // now, tell me if this cpu has avx2
     int has_avx2 = ruapu_supports("avx2");
 
+    // loop all supported features
+    const char* const* supported = ruapu_rua();
+    while (*supported)
+    {
+        fprintf(stderr, "%s\n", *supported);
+        supported++;
+    }
+
     return 0;
 }
 ```

main.c

@@ -113,5 +113,12 @@ int main()
 
 #endif
 
+    const char* const* supported = ruapu_rua();
+    while (*supported)
+    {
+        fprintf(stderr, "%s\n", *supported);
+        supported++;
+    }
+
     return 0;
 }

ruapu.h

@@ -15,6 +15,8 @@ void ruapu_init();
 
 int ruapu_supports(const char* isa);
 
+const char* const* ruapu_rua();
+
 #ifdef RUAPU_IMPLEMENTATION
 
 #include <setjmp.h>
@@ -261,10 +263,9 @@ struct ruapu_isa_entry
 {
     const char* isa;
     ruapu_some_inst inst;
-    int capable;
 };
 
-#define RUAPU_ISAENTRY(isa) { #isa, (ruapu_some_inst)ruapu_some_##isa, 0 },
+#define RUAPU_ISAENTRY(isa) { #isa, (ruapu_some_inst)ruapu_some_##isa },
 
 struct ruapu_isa_entry g_ruapu_isa_map[] = {
 
@@ -370,26 +371,42 @@ RUAPU_ISAENTRY(orvdx64)
 
 #undef RUAPU_ISAENTRY
 
+const char* g_ruapu_isa_supported[sizeof(g_ruapu_isa_map) / sizeof(g_ruapu_isa_map[0]) + 1] = { 0 };
+
 #if defined __openrisc__
 static void ruapu_detect_openrisc_isa()
 {
     uint32_t value;
     uint16_t addr = U(0x0000);
     asm volatile ("l.mfspr %0, r0, %1" : "=r" (value) : "K" (addr));
+    size_t j = 0;
     for (size_t i = 0; i < sizeof(g_ruapu_isa_map) / sizeof(g_ruapu_isa_map[0]); i++)
     {
-        g_ruapu_isa_map[0].capable = ((value) >> (5 + i)) & 0x1;
+        int capable = ((value) >> (5 + i)) & 0x1;
+        if (capable)
+        {
+            g_ruapu_isa_supported[j] = g_ruapu_isa_map[i].isa;
+            j++;
+        }
     }
+    g_ruapu_isa_supported[j] = 0;
 }
 #endif
 
 void ruapu_init()
 {
 #if defined _WIN32 || defined __ANDROID__ || defined __linux__ || defined __APPLE__ || defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__
+    size_t j = 0;
     for (size_t i = 0; i < sizeof(g_ruapu_isa_map) / sizeof(g_ruapu_isa_map[0]); i++)
     {
-        g_ruapu_isa_map[i].capable = ruapu_detect_isa(g_ruapu_isa_map[i].inst);
+        int capable = ruapu_detect_isa(g_ruapu_isa_map[i].inst);
+        if (capable)
+        {
+            g_ruapu_isa_supported[j] = g_ruapu_isa_map[i].isa;
+            j++;
+        }
     }
+    g_ruapu_isa_supported[j] = 0;
 #elif defined __openrisc__
     ruapu_detect_openrisc_isa();
 #else 
@@ -402,17 +419,23 @@ void ruapu_init()
 
 int ruapu_supports(const char* isa)
 {
-    for (size_t i = 0; i < sizeof(g_ruapu_isa_map) / sizeof(g_ruapu_isa_map[0]); i++)
+    const char* const* isa_supported = g_ruapu_isa_supported;
+    while (*isa_supported)
     {
-        if (strcmp(g_ruapu_isa_map[i].isa, isa) == 0)
-        {
-            return g_ruapu_isa_map[i].capable;
-        }
+        if (strcmp(*isa_supported, isa) == 0)
+            return 1;
+
+        isa_supported++;
     }
 
     return 0;
 }
 
+const char* const* ruapu_rua()
+{
+    return g_ruapu_isa_supported;
+}
+
 #endif // RUAPU_IMPLEMENTATION
 
 #ifdef __cplusplus