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Annotation of src/usr.bin/window/context.c, Revision 1.5

1.5     ! millert     1: /*     $OpenBSD: context.c,v 1.4 2001/11/19 19:02:18 mpech Exp $       */
1.1       deraadt     2: /*     $NetBSD: context.c,v 1.3 1995/09/28 10:34:15 tls Exp $  */
                      3:
                      4: /*
                      5:  * Copyright (c) 1983, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Edward Wang at The University of California, Berkeley.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
1.5     ! millert    19:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #ifndef lint
                     37: #if 0
                     38: static char sccsid[] = "@(#)context.c  8.1 (Berkeley) 6/6/93";
                     39: #else
1.5     ! millert    40: static char rcsid[] = "$OpenBSD: context.c,v 1.4 2001/11/19 19:02:18 mpech Exp $";
1.1       deraadt    41: #endif
                     42: #endif /* not lint */
                     43:
                     44: #include "value.h"
                     45: #include "string.h"
                     46: #include "context.h"
                     47: #include <fcntl.h>
                     48:
                     49: /*
                     50:  * Context push/pop for nested command files.
                     51:  */
                     52:
                     53: char *malloc();
                     54:
                     55: cx_alloc()
                     56: {
1.4       mpech      57:        struct context *xp;
1.1       deraadt    58:
                     59:        if (cx.x_type != 0) {
                     60:                xp = (struct context *)
                     61:                        malloc((unsigned) sizeof (struct context));
                     62:                if (xp == 0)
                     63:                        return -1;
                     64:                *xp = cx;
                     65:                cx.x_link = xp;
                     66:                cx.x_type = 0;
                     67:        }
                     68:        cx.x_erred = 0;
                     69:        cx.x_synerred = 0;
                     70:        cx.x_abort = 0;
                     71:        return 0;
                     72: }
                     73:
                     74: cx_free()
                     75: {
                     76:        struct context *xp;
                     77:
                     78:        if ((xp = cx.x_link) != 0) {
                     79:                cx = *xp;
                     80:                free((char *)xp);
                     81:        } else
                     82:                cx.x_type = 0;
                     83: }
                     84:
                     85: cx_beginfile(filename)
                     86: char *filename;
                     87: {
                     88:        if (cx_alloc() < 0)
                     89:                return -1;
                     90:        cx.x_type = X_FILE;
                     91:        if ((cx.x_filename = str_cpy(filename)) == 0)
                     92:                goto bad;
                     93:        cx.x_fp = fopen(filename, "r");
                     94:        if (cx.x_fp == 0)
                     95:                goto bad;
                     96:        (void) fcntl(fileno(cx.x_fp), F_SETFD, 1);
                     97:        cx.x_bol = 1;
                     98:        cx.x_lineno = 0;
                     99:        cx.x_errwin = 0;
                    100:        cx.x_noerr = 0;
                    101:        return 0;
                    102: bad:
                    103:        if (cx.x_filename != 0)
                    104:                str_free(cx.x_filename);
                    105:        cx_free();
                    106:        return -1;
                    107: }
                    108:
                    109: cx_beginbuf(buf, arg, narg)
                    110: char *buf;
                    111: struct value *arg;
                    112: int narg;
                    113: {
                    114:        if (cx_alloc() < 0)
                    115:                return -1;
                    116:        cx.x_type = X_BUF;
                    117:        cx.x_bufp = cx.x_buf = buf;
                    118:        cx.x_arg = arg;
                    119:        cx.x_narg = narg;
                    120:        return 0;
                    121: }
                    122:
                    123: cx_end()
                    124: {
                    125:        switch (cx.x_type) {
                    126:        case X_BUF:
                    127:                break;
                    128:        case X_FILE:
                    129:                (void) fclose(cx.x_fp);
                    130:                str_free(cx.x_filename);
                    131:                break;
                    132:        }
                    133:        cx_free();
                    134: }