clean-up uc_support() API

- rename to more obviously-named uc_arch_supported()
- remove UC_ARCH_ALL and associated test -- There's no point in having this
  API, and it was improperly implemented anyway.
- remove now unneeded archs_enable() and all_arch
- add UNICORN_HAS_PPC test -- This seems to be only partially implemented

include/unicorn/unicorn.h

@@ -78,7 +78,6 @@ typedef enum uc_arch {
     UC_ARCH_SPARC,      // Sparc architecture
     UC_ARCH_M68K,       // M68K architecture
     UC_ARCH_MAX,
-    UC_ARCH_ALL = 0xFFFF, // All architectures - for uc_support()
 } uc_arch;
 
 // Mode type
@@ -203,16 +202,14 @@ unsigned int uc_version(unsigned int *major, unsigned int *minor);
 
 
 /*
- This API can be used to either ask for archs supported by this library.
+ Determine if the given architecture is supported by this library.
 
- To check if a particular arch is supported by this library, set @query to
+ @arch: architecture type (UC_ARCH_*)
- arch mode (UC_ARCH_* value).
- To verify if this library supports all the archs, use UC_ARCH_ALL.
 
  @return True if this library supports the given arch.
 */
 UNICORN_EXPORT
-bool uc_support(int query);
+bool uc_arch_supported(uc_arch arch);
 
 
 /*

uc.c

@@ -36,43 +36,9 @@ static uint64_t map_begin[32], map_end[32];
 static int map_count = 0;
 
 
-static unsigned int all_arch = 0;
-
-static void archs_enable(void)
-{
-    static bool initialized = false;
-
-    if (initialized)
-        return;
-
-#ifdef UNICORN_HAS_ARM
-    all_arch = all_arch + (1 << UC_ARCH_ARM);
-#endif
-#ifdef UNICORN_HAS_ARM64
-    all_arch = all_arch + (1 << UC_ARCH_ARM64);
-#endif
-#ifdef UNICORN_HAS_MIPS
-    all_arch = all_arch + (1 << UC_ARCH_MIPS);
-#endif
-#ifdef UNICORN_HAS_SPARC
-    all_arch = all_arch + (1 << UC_ARCH_SPARC);
-#endif
-#ifdef UNICORN_HAS_M68K
-    all_arch = all_arch + (1 << UC_ARCH_M68K);
-#endif
-#ifdef UNICORN_HAS_X86
-    all_arch = all_arch + (1 << UC_ARCH_X86);
-#endif
-
-    initialized = true;
-}
-
-
 UNICORN_EXPORT
 unsigned int uc_version(unsigned int *major, unsigned int *minor)
 {
-    archs_enable();
-
     if (major != NULL && minor != NULL) {
         *major = UC_API_MAJOR;
         *minor = UC_API_MINOR;
@@ -131,20 +97,34 @@ const char *uc_strerror(uc_err code)
 
 
 UNICORN_EXPORT
-bool uc_support(int query)
+bool uc_arch_supported(uc_arch arch)
 {
-    archs_enable();
+    switch (arch) {
+#ifdef UNICORN_HAS_ARM
+        case UC_ARCH_ARM:   return true;
+#endif
+#ifdef UNICORN_HAS_ARM64
+        case UC_ARCH_ARM64: return true;
+#endif
+#ifdef UNICORN_HAS_M68K
+        case UC_ARCH_M68K:  return true;
+#endif
+#ifdef UNICORN_HAS_MIPS
+        case UC_ARCH_MIPS:  return true;
+#endif
+#ifdef UNICORN_HAS_PPC
+        case UC_ARCH_PPC:   return true;
+#endif
+#ifdef UNICORN_HAS_SPARC
+        case UC_ARCH_SPARC: return true;
+#endif
+#ifdef UNICORN_HAS_X86
+        case UC_ARCH_X86:   return true;
+#endif
 
-    if (query == UC_ARCH_ALL)
+        /* Invalid or disabled arch */
-        return all_arch == ((1 << UC_ARCH_ARM) | (1 << UC_ARCH_ARM64) |
+        default:            return false;
-                (1 << UC_ARCH_MIPS) | (1 << UC_ARCH_X86) |
+    }
-                (1 << UC_ARCH_M68K) | (1 << UC_ARCH_SPARC));
-
-    if ((unsigned int)query < UC_ARCH_MAX)
-        return ((all_arch & (1 << query)) != 0);
-
-    // unsupported query
-    return false;
 }
 
 
@@ -153,8 +133,6 @@ uc_err uc_open(uc_arch arch, uc_mode mode, uch *handle)
 {
     struct uc_struct *uc;
 
-    archs_enable();
-
     if (arch < UC_ARCH_MAX) {
         uc = calloc(1, sizeof(*uc));
         if (!uc) {