getline/getline.c

   1 /* getdelim() and getline() from dietlibc. GPLv2 */
   2
   3 #ifdef NEED_GETLINE
   4
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7 #include <errno.h>
   8 #include <sys/types.h>
   9
  10 #include "getline.h"
  11
  12 ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream) {
  13   size_t i;
  14   int x, tmp;
  15   char *new;
  16
  17   if (!lineptr || !n) {
  18     errno=EINVAL;
  19     return -1;
  20   }
  21   if (!*lineptr) *n=0;
  22   for (i=0; ; ) {
  23     x=fgetc(stream);
  24     if (i>=*n) {
  25       tmp=*n+100;
  26       new=realloc(*lineptr,tmp);
  27       if (!new) return -1;
  28       *lineptr=new; *n=tmp;
  29     }
  30     if (x==EOF) { if (!i) return -1; (*lineptr)[i]=0; return i; }
  31     (*lineptr)[i]=x;
  32     ++i;
  33     if (x==delim) break;
  34   }
  35   (*lineptr)[i]=0;
  36   return i;
  37 }
  38
  39 ssize_t getline(char **lineptr, size_t *n, FILE *stream) {
  40   return getdelim(lineptr,n,'\n',stream);
  41 }
  42
  43 #endif /* NEED_GETLINE */
  44
  45