/*- * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char sccsid[] = "@(#)ex_util.c 8.1 (Berkeley) 6/9/93"; #endif /* not lint */ #include <sys/types.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include "vi.h" /* * ex_getline -- * Return a line from the terminal. */ int ex_getline(sp, fp, lenp) SCR *sp; FILE *fp; size_t *lenp; { size_t off; int ch; char *p; for (off = 0, p = sp->ibp;; ++off) { ch = getc(fp); if (off >= sp->ibp_len) { BINC(sp, sp->ibp, sp->ibp_len, off + 1); p = sp->ibp + off; } if (ch == EOF || ch == '\n') { if (ch == EOF && !off) return (1); *lenp = off; return (0); } *p++ = ch; } /* NOTREACHED */ } /* * set_altfname -- * Set the alternate file name. * * Swap the alternate file name. The reason it's a routine is that I wanted * some place to hang this comment. The alternate file name (normally * referenced using the special character '#' during file expansion) is set * by a large number of operations. In the historic vi, the commands "ex", * "edit" and "next file" obviously set the alternate file name because they * switched the underlying file. Less obviously, the "read", "file", "write" * and "wq" commands set it as well. In this implementation, the new * commands "previous", "split", and "mkexrc" have been added to the list. * Where it gets interesting is that the alternate file name is set multiple * times by some commands. If an edit attempt fails (for whatever reason, * like the current file is modified but as yet unwritten), it is set to the * file name that the user didn't get to edit. If the edit succeeds, it is * set to the last file name that was edited. Good fun. * * XXX: add errlist if it doesn't get ripped out. */ void set_altfname(sp, altfname) SCR *sp; char *altfname; { if (sp->altfname != NULL) FREE(sp->altfname, strlen(sp->altfname)); if ((sp->altfname = strdup(altfname)) == NULL) msgq(sp, M_ERR, "Error: %s", strerror(errno)); }