deal with different versions of gcc/clang handling pragmas inconsiste…

…ntly

js0n.c

@@ -1,14 +1,20 @@
 // by jeremie miller - 2010
 // public domain, contributions/improvements welcome via github at https://github.com/quartzjer/js0n
 
-// gcc started warning for the init syntax used here, is not helpful so don't generate the spam
+// gcc started warning for the init syntax used here, is not helpful so don't generate the spam, supressing the warning is really inconsistently supported across versions
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
 #pragma GCC diagnostic push
+#endif
+#pragma GCC diagnostic ignored "-Wunknown-pragmas"
+#pragma GCC diagnostic ignored "-Wpragmas"
 #pragma GCC diagnostic ignored "-Winitializer-overrides"
+#pragma GCC diagnostic ignored "-Woverride-init"
 
 // opportunity to further optimize would be having different jump tables for higher depths
 #define PUSH(i) if(depth == 1) prev = *out++ = ((cur+i) - js)
 #define CAP(i) if(depth == 1) prev = *out++ = ((cur+i) - (js + prev) + 1)
 
+// this makes a single pass across the json bytes, using each byte as an index into a jump table to build an index and transition state
 int js0n(const unsigned char *js, unsigned int len, unsigned short *out, unsigned int olen)
 {
 	unsigned short prev = 0, *oend;
@@ -131,4 +137,6 @@ int js0n(const unsigned char *js, unsigned int len, unsigned short *out, unsigne
 
 }
 
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
 #pragma GCC diagnostic pop
+#endif