/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org> * * GNU Library General Public License (LGPL) version 2 or later. * * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details. */ #include "_stdio.h" #ifdef __DO_UNLOCKED weak_alias(__fgets_unlocked,fgets_unlocked); #ifndef __UCLIBC_HAS_THREADS__ weak_alias(__fgets_unlocked,fgets); #endif char *__fgets_unlocked(char *__restrict s, int n, register FILE * __restrict stream) { register char *p; int c; __STDIO_STREAM_VALIDATE(stream); #ifdef __UCLIBC_MJN3_ONLY__ #warning CONSIDER: What should fgets do if n <= 0? #endif /* __UCLIBC_MJN3_ONLY__ */ /* Should we assert here? Or set errno? Or just fail... */ if (n <= 0) { /* __set_errno(EINVAL); */ goto ERROR; } p = s; while (--n) { if (__STDIO_STREAM_CAN_USE_BUFFER_GET(stream)) { if ((*p++ = __STDIO_STREAM_BUFFER_GET(stream)) == '\n') { break; } } else { if ((c = __fgetc_unlocked(stream)) == EOF) { if (__FERROR_UNLOCKED(stream)) { goto ERROR; } break; } if ((*p++ = c) == '\n') { break; } } } #ifdef __UCLIBC_MJN3_ONLY__ #warning CONSIDER: If n==1 and not at EOF, should fgets return an empty string? #endif /* __UCLIBC_MJN3_ONLY__ */ if (p > s) { *p = 0; return s; } ERROR: return NULL; } #elif defined __UCLIBC_HAS_THREADS__ char *fgets(char *__restrict s, int n, register FILE * __restrict stream) { char *retval; __STDIO_AUTO_THREADLOCK_VAR; __STDIO_AUTO_THREADLOCK(stream); retval = __fgets_unlocked(s, n, stream); __STDIO_AUTO_THREADUNLOCK(stream); return retval; } #endif