itoa_gen.py


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with open("itoa_lut.h", "w") as f:
    f.write("#include <stdint.h>\n")
    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))
        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};")