/*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rodney Ruddock of the University of Guelph. * * 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[] = "@(#)filename.c 8.1 (Berkeley) 5/31/93"; #endif /* not lint */ #include <sys/types.h> #include <limits.h> #include <regex.h> #include <setjmp.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #ifdef DBI #include <db.h> #endif #include "ed.h" #include "extern.h" /* * A central function for any command that has to deal with a filename * (to be or not to be remembered). */ char * filename(inputt, errnum) FILE *inputt; int *errnum; { register int l_cnt = 0; char *l_fname; int l_esc = 0, l_bang_flag = 0; l_fname = calloc(FILENAME_LEN+2, sizeof(char)); if (l_fname == NULL) { *errnum = -1; strcpy(help_msg, "out of memory error"); return (NULL); } if ((ss = getc(inputt)) != ' ') { if (ss == '\n') { ungetc(ss, inputt); /* * It's not really an error, but to flag remembered * filename is to be used. */ *errnum = -2; } else { *errnum = -1; strcpy(help_msg, "space required before filename given"); } return (NULL); } while (ss = getc(inputt)) if (ss != ' ') { ungetc(ss, inputt); break; } for (;;) { ss = getc(inputt); if ((ss == '\\') && (l_esc == 0)) { ss = getchar(); l_esc = 1; } else l_esc = 0; if ((ss == '\n') || (ss == EOF)) { l_fname[l_cnt] = '\0'; break; } else if ((ss == '!') && (l_esc == 0) && (l_cnt < 2)) l_bang_flag = 1; else if ((ss != ' ') || (l_bang_flag)) l_fname[l_cnt++] = ss; else { *errnum = -1; return (NULL); } if (l_cnt >= FILENAME_LEN) { strcpy(help_msg, "filename+path length too long"); *errnum = -1; ungetc('\n', inputt); return (NULL); } } if (l_fname[0] == '\0') { sigspecial++; strcpy(l_fname, filename_current); sigspecial--; if (sigint_flag && (!sigspecial)) SIGINT_ACTION; } *errnum = 1; l_fname[FILENAME_LEN+1] = l_bang_flag; return (l_fname); }