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Diffstat (limited to 'newlib/libc/stdio/fgets.c')
| -rw-r--r-- | newlib/libc/stdio/fgets.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/newlib/libc/stdio/fgets.c b/newlib/libc/stdio/fgets.c deleted file mode 100644 index f5dde4903..000000000 --- a/newlib/libc/stdio/fgets.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by the University of California, Berkeley. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* -FUNCTION -<<fgets>>---get character string from a file or stream - -INDEX - fgets - -ANSI_SYNOPSIS - #include <stdio.h> - char *fgets(char *<[buf]>, int <[n]>, FILE *<[fp]>); - -TRAD_SYNOPSIS - #include <stdio.h> - char *fgets(<[buf]>,<[n]>,<[fp]>) - char *<[buf]>; - int <[n]>; - FILE *<[fp]>; - -DESCRIPTION - Reads at most <[n-1]> characters from <[fp]> until a newline - is found. The characters including to the newline are stored - in <[buf]>. The buffer is terminated with a 0. - - -RETURNS - <<fgets>> returns the buffer passed to it, with the data - filled in. If end of file occurs with some data already - accumulated, the data is returned with no other indication. If - no data are read, NULL is returned instead. - -PORTABILITY - <<fgets>> should replace all uses of <<gets>>. Note however - that <<fgets>> returns all of the data, while <<gets>> removes - the trailing newline (with no indication that it has done so.) - -Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, -<<lseek>>, <<read>>, <<sbrk>>, <<write>>. -*/ - -#include <_ansi.h> -#include <stdio.h> -#include <string.h> -#include "local.h" - -/* - * Read at most n-1 characters from the given file. - * Stop when a newline has been read, or the count runs out. - * Return first argument, or NULL if no characters were read. - */ - -char * -_DEFUN(fgets, (buf, n, fp), - char *buf _AND - int n _AND - FILE * fp) -{ - size_t len; - char *s; - unsigned char *p, *t; - - if (n < 2) /* sanity check */ - return 0; - - s = buf; - - CHECK_INIT(_REENT); - - _flockfile (fp); -#ifdef __SCLE - if (fp->_flags & __SCLE) - { - int c; - /* Sorry, have to do it the slow way */ - while (--n > 0 && (c = __sgetc (fp)) != EOF) - { - *s++ = c; - if (c == '\n') - break; - } - if (c == EOF && s == buf) - { - _funlockfile (fp); - return NULL; - } - *s = 0; - _funlockfile (fp); - return buf; - } -#endif - - n--; /* leave space for NUL */ - do - { - /* - * If the buffer is empty, refill it. - */ - if ((len = fp->_r) <= 0) - { - if (__srefill (fp)) - { - /* EOF: stop with partial or no line */ - if (s == buf) - { - _funlockfile (fp); - return 0; - } - break; - } - len = fp->_r; - } - p = fp->_p; - - /* - * Scan through at most n bytes of the current buffer, - * looking for '\n'. If found, copy up to and including - * newline, and stop. Otherwise, copy entire chunk - * and loop. - */ - if (len > n) - len = n; - t = (unsigned char *) memchr ((_PTR) p, '\n', len); - if (t != 0) - { - len = ++t - p; - fp->_r -= len; - fp->_p = t; - _CAST_VOID memcpy ((_PTR) s, (_PTR) p, len); - s[len] = 0; - _funlockfile (fp); - return (buf); - } - fp->_r -= len; - fp->_p += len; - _CAST_VOID memcpy ((_PTR) s, (_PTR) p, len); - s += len; - } - while ((n -= len) != 0); - *s = 0; - _funlockfile (fp); - return buf; -} |