home *** CD-ROM | disk | FTP | other *** search
- /*
- * fgets.c --
- *
- * Source code for the "fgets" 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: fgets.c,v 1.1 88/06/10 16:23:44 ouster Exp $ SPRITE (Berkeley)";
- #endif not lint
-
- #include "stdio.h"
-
- /*
- *----------------------------------------------------------------------
- *
- * fgets --
- *
- * Reads a line from a stream.
- *
- * Results:
- * Characters are read from stream and placed at buf until a
- * newline is encountered or maxChars-1 characters have been
- * processed or an end of file or error is encountered. 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 before reading any characters.
- *
- * Side effects:
- * Characters are removed from stream.
- *
- *----------------------------------------------------------------------
- */
-
- char *
- fgets(bufferPtr, maxChars, stream)
- char *bufferPtr; /* Where to place characters. Must have
- * at least maxChars bytes of storage. */
- register int maxChars; /* Maximum number of characters to read
- * from stream. */
- register FILE *stream; /* Stream from which to read characters. */
- {
- register char *destPtr = bufferPtr;
- register int c;
-
- for (maxChars--; maxChars > 0; maxChars--) {
- c = getc(stream);
- if (c < 0) {
- *destPtr = 0;
- return NULL;
- }
- *destPtr = c;
- destPtr++;
- if (c == '\n') {
- break;
- }
- }
- *destPtr = 0;
- return bufferPtr;
- }
-