/* Generated by re2c */ // re2c $INPUT -o $OUTPUT -i #include <stdint.h> #include <limits.h> #include <assert.h> static const uint64_t ERROR = ~0lu; enum YYCONDTYPE { }; template<int BASE> static void adddgt(uint64_t &u, unsigned int d) { u = u * BASE + d; if (u > UINT32_MAX) u = ERROR; } static uint64_t parse_u32(const char *s) { const char *YYMARKER; uint64_t u = 0; { char yych; yych = *s; switch (yych) { case '0': goto yy4; case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy6; default: goto yy2; } yy2: ++s; { return ERROR; } yy4: yych = *(YYMARKER = ++s); switch (yych) { case 'B': case 'b': goto yy8; case 'X': case 'x': goto yy10; default: goto yy5; } yy5: { goto oct; } yy6: ++s; s -= 1; { goto dec; } yy8: yych = *++s; switch (yych) { case '0': case '1': goto yy11; default: goto yy9; } yy9: s = YYMARKER; goto yy5; yy10: yych = *++s; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': goto yy13; default: goto yy9; } yy11: ++s; s -= 1; { goto bin; } yy13: ++s; s -= 1; { goto hex; } } bin: { char yych; yych = *s; switch (yych) { case 0x00: goto yy17; case '0': case '1': goto yy21; default: goto yy19; } yy17: ++s; { return u; } yy19: ++s; { return ERROR; } yy21: ++s; { adddgt<2>(u, s[-1] - '0'); goto bin; } } oct: { char yych; yych = *s; switch (yych) { case 0x00: goto yy25; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': goto yy29; default: goto yy27; } yy25: ++s; { return u; } yy27: ++s; { return ERROR; } yy29: ++s; { adddgt<8>(u, s[-1] - '0'); goto oct; } } dec: { char yych; yych = *s; switch (yych) { case 0x00: goto yy33; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy37; default: goto yy35; } yy33: ++s; { return u; } yy35: ++s; { return ERROR; } yy37: ++s; { adddgt<10>(u, s[-1] - '0'); goto dec; } } hex: { char yych; yych = *s; switch (yych) { case 0x00: goto yy41; case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy45; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': goto yy47; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': goto yy49; default: goto yy43; } yy41: ++s; { return u; } yy43: ++s; { return ERROR; } yy45: ++s; { adddgt<16>(u, s[-1] - '0'); goto hex; } yy47: ++s; { adddgt<16>(u, s[-1] - 'A' + 10); goto hex; } yy49: ++s; { adddgt<16>(u, s[-1] - 'a' + 10); goto hex; } } } int main() { assert(parse_u32("1234567890") == 1234567890); assert(parse_u32("0b1101") == 13); assert(parse_u32("0x7Fe") == 2046); assert(parse_u32("0644") == 420); assert(parse_u32("9999999999") == ERROR); assert(parse_u32("") == ERROR); return 0; } c/conditions/parse_u32_blocks.re:29:23: warning: rule matches empty string [-Wmatch-empty-string]