Parsing exprs, enum_decls, Introduce intern table, symbol table

common.c

@@ -0,0 +1,57 @@
+
+function S64
+clamp_top_s64(S64 val, S64 max){
+  if(val>max)return max;
+  return val;
+}
+
+function SizeU
+get_align_offset(SizeU size, SizeU align){
+  SizeU mask = align - 1;
+  SizeU val = size & mask;
+  if(val){
+    val = align - val;
+  }
+  return val;
+}
+
+function SizeU
+align_up(SizeU size, SizeU align){
+  SizeU result = size + get_align_offset(size, align);
+  return result;
+}
+
+function U64 
+hash_fnv(String string) {
+  U64 hash = (U64)14695981039346656037ULL;
+  for (U64 i = 0; i < string.len; i++) {
+    hash = hash ^ (U64)(string.str[i]);
+    hash = hash * (U64)1099511628211ULL;
+  }
+  return hash;
+}
+
+function U64
+is_pow2(U64 x) {
+  assert(x != 0);
+  B32 result = (x & (x - 1llu)) == 0;
+  return result;
+}
+
+function U64 
+wrap_around_pow2(U64 x, U64 power_of_2) {
+  assert(is_pow2(power_of_2));
+  U64 r = (((x)&((power_of_2)-1llu)));
+  return r;
+}
+
+function B32
+string_compare(String a, String b){
+  if(a.len != b.len)
+    return false;
+  for(S64 i = 0; i < a.len; i++){
+    if(a.str[i] != b.str[i])
+      return false;
+  }
+  return true;
+}