#include "io.h"

uint8_t* read_file(const char* path, size_t* size) {
  // Read the contents of the file specified by path into a heap-allocated
  // buffer and return a pointer to that buffer.
  FILE* f = fopen(path, "r");
  if (f == NULL) {
    printf("Fopen error: %d\n", errno);
    fclose(f);
    return NULL;
  }

  struct stat statOfFile;
  int status = fstat(fileno(f), &statOfFile);
  if (status == -1) {
    printf("Fstat error: %d\n", errno);
    fclose(f);
    return NULL;
  };

  if ((statOfFile.st_mode & S_IFMT) != S_IFREG) {
    printf("File is not a regular file!\n");
    fclose(f);
    return NULL;
  }

  uint8_t* data = malloc(statOfFile.st_size);

  size_t bytesRead =
      fread(data, statOfFile.st_blksize, statOfFile.st_blocks, f);
  // Or: size_t bytesRead = fread(data, sizeof(char), statOfFile.st_size, f);
  if (bytesRead != 0 && !feof(f)) {
    printf("Error reading file!\n");
    fclose(f);
    return NULL;
  }

  fclose(f);

  (*size) = bytesRead;
  return data;
}