cleanup lut ~800ms

1 files changed, 8 insertions, 9 deletions

diff --git a/itoa_gen.py b/itoa_gen.py
index 0437c62..2c62ed5 100644
--- a/itoa_gen.py
+++ b/itoa_gen.py
@@ -1,15 +1,14 @@
 with open("itoa_lut.h", "w") as f:
     f.write("#include <stdint.h>\n")
-    f.write("typedef union { struct { char chars[3]; uint8_t len; } fields; uint32_t bits; } LutEntry;\n")
-    f.write("const uint32_t itoa_lut[256] = {")
+    f.write("typedef struct { char chars[3]; uint8_t len; } LutEntry;\n")
+    f.write("const LutEntry itoa_lut[256] = {\n")
     out = []
     for i in range(0, 256):
         running=len(str(i))
-        for j in reversed(range(3)):
-            running = running << 8
-            if j < len(str(i)):
-                running += ord(str(i)[j])
-        out.append(hex(running))
-    f.write(", ".join(out))
-    f.write("};")
+        s = str(i)
+        while len(s) < 3:
+            s=s+chr(69)
+        out.append("{{"+",".join(map(lambda x: f"'{x}'", s))+"}, "+str(len(str(i)))+"}")
+    f.write(",\n".join(out))
+    f.write("\n};")