move code size benchmark to separate directory

code-size-benchmark/posint-dec-to-hex-optimal.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdint.h>
+
+__attribute__((noinline))
+int morph_posint_radix( char * in, char * out ) {
+    uint64_t value = 0;
+        while( *in ) {
+            if( *in >= '0' && *in <= '9' ) {
+                value *= 10;
+                value += *in - '0';
+            }
+            else
+                return -1;
+
+            in++;
+        }
+
+        uint64_t v = value;
+        while( v ) {
+            out ++;
+            v /= 16;
+        }
+
+        *out-- = '\0';
+        while( value ) {
+            unsigned digit = value % 16;
+            if( digit < 10 ) {
+                *out-- = digit + '0';
+            } else if( digit < 16 ) {
+                *out-- = digit + 'a' - 10;
+            } else {
+                return -1;
+            }
+            value /= 16;
+        }
+
+    return 0;
+}
+
+int main() {
+    char bufA[1024];
+    char bufB[1024];
+
+    char * in = bufA;
+    char * out = bufB;
+
+    scanf("%s", in);
+    morph_posint_radix( in, out );
+    printf("%s\n", out);
+
+    return 0;
+}