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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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gets.c
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C/C++ Source or Header
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1988-06-10
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/*
* gets.c --
*
* Source code for the "gets" library procedure.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: gets.c,v 1.1 88/06/10 16:23:54 ouster Exp $ SPRITE (Berkeley)";
#endif not lint
#include "stdio.h"
/*
*----------------------------------------------------------------------
*
* gets --
*
* Read a line from stdin.
*
* Results:
* Characters are read from stdin and placed at buf until a
* newline is encountered or an end of file or error is encountered.
* The newline is read and discarded, and the string at buf is left
* null-terminated. The return value is a pointer to buf if
* all went well, or NULL if an end of file or error was encountered.
*
* Side effects:
* Characters are removed from stream.
*
*----------------------------------------------------------------------
*/
char *
gets(bufferPtr)
char *bufferPtr; /* Where to place characters. */
{
register char *destPtr = bufferPtr;
register int c;
register FILE *stream = stdin;
while (1) {
c = getc(stream);
if (c == EOF) {
*destPtr = 0;
return NULL;
}
if (c == '\n') {
break;
}
*destPtr = c;
destPtr++;
}
*destPtr = 0;
return bufferPtr;
}