string_utils.c

   1 #include <stddef.h>
   2
   3 int unescape_newlines(char *dest, const char *src, size_t n) {
   4         int i = 0, j = 0;
   5         while (i < n) {
   6                 if (i == n - 1) {
   7                         /* last byte is \, next invalid read contains n -> don't read the n */
   8                         dest[j] = src[i];
   9                 }
  10                 else if (src[i] == '\\' && src[i+1] == 'n' ) {
  11                         ++i;
  12                         dest[j] = '\n';
  13                 }
  14                 else if (src[i] == '\\' && src[i+1] == '\\') {
  15                         dest[j] = src[++i];
  16                 }
  17                 else {
  18                         dest[j] = src[i];
  19                 }
  20                 ++j;
  21                 ++i;
  22         }
  23         return j;
  24 }