1 /* $OpenBSD: io.c,v 1.15 2009/10/28 15:40:47 deraadt Exp $ */
2 /* $NetBSD: io.c,v 1.2 1995/03/21 09:04:43 cgd Exp $ */
3
4 /* io.c: This file contains the i/o routines for the ed line editor */
5 /*-
6 * Copyright (c) 1993 Andrew Moore, Talke Studio.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include "ed.h"
32
33 __RCSID("$MirOS: src/bin/ed/io.c,v 1.5 2012/01/04 21:57:44 tg Exp $");
34
35 extern int scripted;
36
37 /* read_file: read a named file/pipe into the buffer; return line count */
38 int
read_file(char * fn,int n)39 read_file(char *fn, int n)
40 {
41 FILE *fp;
42 int size;
43
44
45 fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r");
46 if (fp == NULL) {
47 perror(fn);
48 seterrmsg("cannot open input file");
49 return ERR;
50 } else if ((size = read_stream(fp, n)) < 0)
51 return ERR;
52 else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
53 perror(fn);
54 seterrmsg("cannot close input file");
55 return ERR;
56 }
57 fprintf(stderr, !scripted ? "%d\n" : "", size);
58 return current_addr - n;
59 }
60
61
62 #ifdef DES
63 extern int des;
64 #define DESGETCHAR(fp) (des ? get_des_char((fp)) : getc((fp)))
65 #define DESPUTCHAR(c, fp) (des ? put_des_char((c), (fp)) : fputc((c), (fp)))
66 #else
67 #define DESGETCHAR(fp) (getc((fp)))
68 #define DESPUTCHAR(c, fp) (fputc((c), (fp)))
69 #endif
70
71 char *sbuf; /* file i/o buffer */
72 int sbufsz; /* file i/o buffer size */
73 int newline_added; /* if set, newline appended to input file */
74
75 /* read_stream: read a stream into the editor buffer; return status */
76 int
read_stream(FILE * fp,int n)77 read_stream(FILE *fp, int n)
78 {
79 line_t *lp = get_addressed_line_node(n);
80 undo_t *up = NULL;
81 unsigned int size = 0;
82 int o_newline_added = newline_added;
83 int o_isbinary = isbinary;
84 int appended = (n == addr_last);
85 int len;
86
87 isbinary = newline_added = 0;
88 #ifdef DES
89 if (des)
90 init_des_cipher();
91 #endif
92 for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) {
93 SPL1();
94 if (put_sbuf_line(sbuf) == NULL) {
95 SPL0();
96 return ERR;
97 }
98 lp = lp->q_forw;
99 if (up)
100 up->t = lp;
101 else if ((up = push_undo_stack(UADD, current_addr,
102 current_addr)) == NULL) {
103 SPL0();
104 return ERR;
105 }
106 SPL0();
107 }
108 if (len < 0)
109 return ERR;
110 if (appended && size && o_isbinary && o_newline_added)
111 fputs("newline inserted\n", stderr);
112 else if (newline_added && (!appended || (!isbinary && !o_isbinary)))
113 fputs("newline appended\n", stderr);
114 if (isbinary && newline_added && !appended)
115 size += 1;
116 if (!size)
117 newline_added = 1;
118 newline_added = appended ? newline_added : o_newline_added;
119 isbinary = isbinary | o_isbinary;
120 #ifdef DES
121 if (des)
122 /* adjust DES size */
123 size += 8 - size % 8;
124 #endif
125 return size;
126 }
127
128
129 /* get_stream_line: read a line of text from a stream; return line length */
130 int
get_stream_line(FILE * fp)131 get_stream_line(FILE *fp)
132 {
133 int c;
134 int i = 0;
135
136 while (((c = DESGETCHAR(fp)) != EOF || (!feof(fp) &&
137 !ferror(fp))) && c != '\n') {
138 REALLOC(sbuf, sbufsz, i + 1, ERR);
139 if (!(sbuf[i++] = c))
140 isbinary = 1;
141 }
142 REALLOC(sbuf, sbufsz, i + 2, ERR);
143 if (c == '\n')
144 sbuf[i++] = c;
145 else if (ferror(fp)) {
146 perror(NULL);
147 seterrmsg("cannot read input file");
148 return ERR;
149 } else if (i) {
150 sbuf[i++] = '\n';
151 newline_added = 1;
152 }
153 sbuf[i] = '\0';
154 return (isbinary && newline_added && i) ? --i : i;
155 }
156
157
158 /* write_file: write a range of lines to a named file/pipe; return line count */
159 int
write_file(const char * fn,const char * mode,int n,int m)160 write_file(const char *fn, const char *mode, int n, int m)
161 {
162 FILE *fp;
163 int size;
164
165 fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode);
166 if (fp == NULL) {
167 perror(fn);
168 seterrmsg("cannot open output file");
169 return ERR;
170 } else if ((size = write_stream(fp, n, m)) < 0)
171 return ERR;
172 else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) {
173 perror(fn);
174 seterrmsg("cannot close output file");
175 return ERR;
176 }
177 fprintf(stderr, !scripted ? "%d\n" : "", size);
178 return n ? m - n + 1 : 0;
179 }
180
181
182 /* write_stream: write a range of lines to a stream; return status */
183 int
write_stream(FILE * fp,int n,int m)184 write_stream(FILE *fp, int n, int m)
185 {
186 line_t *lp = get_addressed_line_node(n);
187 unsigned int size = 0;
188 char *s;
189 int len;
190
191 #ifdef DES
192 if (des)
193 init_des_cipher();
194 #endif
195 for (; n && n <= m; n++, lp = lp->q_forw) {
196 if ((s = get_sbuf_line(lp)) == NULL)
197 return ERR;
198 len = lp->len;
199 if (n != addr_last || !isbinary || !newline_added)
200 s[len++] = '\n';
201 if (put_stream_line(fp, s, len) < 0)
202 return ERR;
203 size += len;
204 }
205 #ifdef DES
206 if (des) {
207 flush_des_file(fp); /* flush buffer */
208 size += 8 - size % 8; /* adjust DES size */
209 }
210 #endif
211 return size;
212 }
213
214
215 /* put_stream_line: write a line of text to a stream; return status */
216 int
put_stream_line(FILE * fp,char * s,int len)217 put_stream_line(FILE *fp, char *s, int len)
218 {
219 while (len--) {
220 if (DESPUTCHAR(*s, fp) < 0) {
221 perror(NULL);
222 seterrmsg("cannot write file");
223 return ERR;
224 }
225 s++;
226 }
227 return 0;
228 }
229
230 /* get_extended_line: get a an extended line from stdin */
231 char *
get_extended_line(int * sizep,int nonl)232 get_extended_line(int *sizep, int nonl)
233 {
234 static char *cvbuf = NULL; /* buffer */
235 static int cvbufsz = 0; /* buffer size */
236
237 int l, n;
238 char *t = ibufp;
239
240 while (*t++ != '\n')
241 ;
242 if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) {
243 *sizep = l;
244 return ibufp;
245 }
246 *sizep = -1;
247 REALLOC(cvbuf, cvbufsz, l, NULL);
248 memcpy(cvbuf, ibufp, l);
249 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */
250 if (nonl)
251 l--; /* strip newline */
252 for (;;) {
253 if ((n = get_tty_line()) < 0)
254 return NULL;
255 else if (n == 0 || ibuf[n - 1] != '\n') {
256 seterrmsg("unexpected end-of-file");
257 return NULL;
258 }
259 REALLOC(cvbuf, cvbufsz, l + n, NULL);
260 memcpy(cvbuf + l, ibuf, n);
261 l += n;
262 if (n < 2 || !has_trailing_escape(cvbuf, cvbuf + l - 1))
263 break;
264 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */
265 if (nonl) l--; /* strip newline */
266 }
267 REALLOC(cvbuf, cvbufsz, l + 1, NULL);
268 cvbuf[l] = '\0';
269 *sizep = l;
270 return cvbuf;
271 }
272
273
274 /* get_tty_line: read a line of text from stdin; return line length */
275 int
get_tty_line(void)276 get_tty_line(void)
277 {
278 int oi = 0;
279 int i = 0;
280 int c;
281
282 for (;;)
283 switch (c = getchar()) {
284 default:
285 oi = 0;
286 REALLOC(ibuf, ibufsz, i + 2, ERR);
287 if (!(ibuf[i++] = c)) isbinary = 1;
288 if (c != '\n')
289 continue;
290 lineno++;
291 ibuf[i] = '\0';
292 ibufp = ibuf;
293 return i;
294 case EOF:
295 if (ferror(stdin)) {
296 perror("stdin");
297 seterrmsg("cannot read stdin");
298 clearerr(stdin);
299 ibufp = NULL;
300 return ERR;
301 } else {
302 clearerr(stdin);
303 if (i != oi) {
304 oi = i;
305 continue;
306 } else if (i)
307 ibuf[i] = '\0';
308 ibufp = ibuf;
309 return i;
310 }
311 }
312 }
313
314
315
316 #define ESCAPES "\a\b\f\n\r\t\v\\"
317 #define ESCCHARS "abfnrtv\\"
318
319 extern int rows;
320 extern int cols;
321
322 /* put_tty_line: print text to stdout */
323 int
put_tty_line(char * s,int l,int n,int gflag)324 put_tty_line(char *s, int l, int n, int gflag)
325 {
326 int col = 0;
327 #ifndef BACKWARDS
328 int lc = 0;
329 #endif
330 char *cp;
331
332 if (gflag & GNP) {
333 printf("%d\t", n);
334 col = 8;
335 }
336 for (; l--; s++) {
337 if ((gflag & GLS) && ++col > cols) {
338 fputs("\\\n", stdout);
339 col = 1;
340 #ifndef BACKWARDS
341 if (!scripted && !isglobal && ++lc > rows) {
342 lc = 0;
343 fputs("Press <RETURN> to continue... ", stdout);
344 fflush(stdout);
345 if (get_tty_line() < 0)
346 return ERR;
347 }
348 #endif
349 }
350 if (gflag & GLS) {
351 if (31 < *s && *s < 127 && *s != '\\')
352 putchar(*s);
353 else {
354 putchar('\\');
355 col++;
356 if (*s && (cp = strchr(ESCAPES, *s)) != NULL)
357 putchar(ESCCHARS[cp - ESCAPES]);
358 else {
359 putchar((((unsigned char) *s & 0300) >> 6) + '0');
360 putchar((((unsigned char) *s & 070) >> 3) + '0');
361 putchar(((unsigned char) *s & 07) + '0');
362 col += 2;
363 }
364 }
365
366 } else
367 putchar(*s);
368 }
369 #ifndef BACKWARDS
370 if (gflag & GLS)
371 putchar('$');
372 #endif
373 putchar('\n');
374 return 0;
375 }
376