text: // Copyright 2019 The Wuffs Authors.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //    https://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  // ----------------
  
  #include <inttypes.h>
  #include <stdio.h>
  #include <string.h>
  uint32_t parse(char *, size_t);
  
  void run(char* p) {
    size_t n = strlen(p) + 1;  // +1 for the trailing NUL that ends a C string.
    uint32_t i = parse(p, n);
    printf("%" PRIu32 "\n", i);
  }
  
  int main(int argc, char** argv) {
    run("0");
    run("12");
    run("56789");
    run("4294967295");  // (1<<32) - 1, aka UINT32_MAX.
    run("4294967296");  // (1<<32).
    run("123456789012");
    return 0;
  }
  