1139969Simp/* io.c: This file contains the i/o routines for the ed line editor */ 21556Srgrimes/*- 31556Srgrimes * Copyright (c) 1993 Andrew Moore, Talke Studio. 41556Srgrimes * All rights reserved. 51556Srgrimes * 61556Srgrimes * Redistribution and use in source and binary forms, with or without 71556Srgrimes * modification, are permitted provided that the following conditions 81556Srgrimes * are met: 91556Srgrimes * 1. Redistributions of source code must retain the above copyright 101556Srgrimes * notice, this list of conditions and the following disclaimer. 111556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer in the 131556Srgrimes * documentation and/or other materials provided with the distribution. 141556Srgrimes * 151556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 161556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 171556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 181556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 191556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 201556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 211556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 221556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 231556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 241556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 251556Srgrimes * SUCH DAMAGE. 261556Srgrimes */ 271556Srgrimes 281556Srgrimes#include <sys/cdefs.h> 291556Srgrimes__FBSDID("$FreeBSD$"); 3050471Speter 311556Srgrimes#include "ed.h" 32320646Sallanjude 331556Srgrimes/* read_file: read a named file/pipe into the buffer; return line count */ 3479526Srulong 351556Srgrimesread_file(char *fn, long n) 361556Srgrimes{ 371556Srgrimes FILE *fp; 381556Srgrimes long size; 3968935Sru int cs; 40140563Sru 411556Srgrimes fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r"); 4268935Sru if (fp == NULL) { 43140563Sru fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 4472432Sru errmsg = "cannot open input file"; 451556Srgrimes return ERR; 46320646Sallanjude } 47320646Sallanjude if ((size = read_stream(fp, n)) < 0) { 48320646Sallanjude fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 49320646Sallanjude errmsg = "error reading input file"; 50320646Sallanjude } 51320646Sallanjude if ((cs = (*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { 52320646Sallanjude fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 53320646Sallanjude errmsg = "cannot close input file"; 54320646Sallanjude } 551556Srgrimes if (size < 0 || cs < 0) 5694869Scharnier return ERR; 5794869Scharnier if (!scripted) 58131484Sru fprintf(stdout, "%lu\n", size); 59131484Sru return current_addr - n; 601556Srgrimes} 611556Srgrimes 621556Srgrimesstatic char *sbuf; /* file i/o buffer */ 631556Srgrimesstatic int sbufsz; /* file i/o buffer size */ 6455562Sphantomint newline_added; /* if set, newline appended to input file */ 65167063Sru 66167063Sru/* read_stream: read a stream into the editor buffer; return status */ 67167063Srulong 68167063Sruread_stream(FILE *fp, long n) 69167063Sru{ 70167063Sru line_t *lp = get_addressed_line_node(n); 71167063Sru undo_t *up = NULL; 72167063Sru unsigned long size = 0; 73167063Sru int o_newline_added = newline_added; 741556Srgrimes int o_isbinary = isbinary; 7536149Scharnier int appended = (n == addr_last); 7636149Scharnier int len; 77101591Sume 78101591Sume isbinary = newline_added = 0; 79101591Sume if (des) 80101591Sume init_des_cipher(); 811556Srgrimes for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) { 8236149Scharnier SPL1(); 8336149Scharnier if (put_sbuf_line(sbuf) == NULL) { 841556Srgrimes SPL0(); 851556Srgrimes return ERR; 86167063Sru } 871556Srgrimes lp = lp->q_forw; 881556Srgrimes if (up) 891556Srgrimes up->t = lp; 901556Srgrimes else if ((up = push_undo_stack(UADD, current_addr, 91131505Sru current_addr)) == NULL) { 921556Srgrimes SPL0(); 931556Srgrimes return ERR; 941556Srgrimes } 9536149Scharnier SPL0(); 961556Srgrimes } 971556Srgrimes if (len < 0) 981556Srgrimes return ERR; 991556Srgrimes if (appended && size && o_isbinary && o_newline_added) 1001556Srgrimes fputs("newline inserted\n", stderr); 1011556Srgrimes else if (newline_added && (!appended || (!isbinary && !o_isbinary))) 1021556Srgrimes fputs("newline appended\n", stderr); 1031556Srgrimes if (isbinary && newline_added && !appended) 1041556Srgrimes size += 1; 1051556Srgrimes if (!size) 106131505Sru newline_added = 1; 1071556Srgrimes newline_added = appended ? newline_added : o_newline_added; 1081556Srgrimes isbinary = isbinary | o_isbinary; 1091556Srgrimes if (des) 110167063Sru size += 8 - size % 8; /* adjust DES size */ 111167063Sru return size; 112167063Sru} 113167063Sru 114167063Sru 1151556Srgrimes/* get_stream_line: read a line of text from a stream; return line length */ 1161556Srgrimesint 11794869Scharnierget_stream_line(FILE *fp) 11894869Scharnier{ 11994869Scharnier int c; 1201556Srgrimes int i = 0; 121131505Sru 1221556Srgrimes while (((c = des ? get_des_char(fp) : getc(fp)) != EOF || (!feof(fp) && 1231556Srgrimes !ferror(fp))) && c != '\n') { 12494869Scharnier REALLOC(sbuf, sbufsz, i + 1, ERR); 12594869Scharnier if (!(sbuf[i++] = c)) 12694869Scharnier isbinary = 1; 1271556Srgrimes } 1281556Srgrimes REALLOC(sbuf, sbufsz, i + 2, ERR); 1291556Srgrimes if (c == '\n') 1301556Srgrimes sbuf[i++] = c; 13121635Swosch else if (ferror(fp)) { 13255562Sphantom fprintf(stderr, "%s\n", strerror(errno)); 13368754Sben errmsg = "cannot read input file"; 1341556Srgrimes return ERR; 1351556Srgrimes } else if (i) { 13636149Scharnier sbuf[i++] = '\n'; 1371556Srgrimes newline_added = 1; 1381556Srgrimes } 1391556Srgrimes sbuf[i] = '\0'; 14036149Scharnier return (isbinary && newline_added && i) ? --i : i; 1411556Srgrimes} 1421556Srgrimes 1431556Srgrimes 1441556Srgrimes/* write_file: write a range of lines to a named file/pipe; return line count */ 145141846Srulong 1461556Srgrimeswrite_file(char *fn, const char *mode, long n, long m) 1471556Srgrimes{ 1481556Srgrimes FILE *fp; 149167063Sru long size; 150167063Sru int cs; 1511556Srgrimes 152167063Sru fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode); 1531556Srgrimes if (fp == NULL) { 1541556Srgrimes fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 1551556Srgrimes errmsg = "cannot open output file"; 156167063Sru return ERR; 15755562Sphantom } 1581556Srgrimes if ((size = write_stream(fp, n, m)) < 0) { 1591556Srgrimes fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 16068935Sru errmsg = "error writing output file"; 161 } 162 if ((cs = (*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { 163 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 164 errmsg = "cannot close output file"; 165 } 166 if (size < 0 || cs < 0) 167 return ERR; 168 if (!scripted) 169 fprintf(stdout, "%lu\n", size); 170 return n ? m - n + 1 : 0; 171} 172 173 174/* write_stream: write a range of lines to a stream; return status */ 175long 176write_stream(FILE *fp, long n, long m) 177{ 178 line_t *lp = get_addressed_line_node(n); 179 unsigned long size = 0; 180 char *s; 181 int len; 182 183 if (des) 184 init_des_cipher(); 185 for (; n && n <= m; n++, lp = lp->q_forw) { 186 if ((s = get_sbuf_line(lp)) == NULL) 187 return ERR; 188 len = lp->len; 189 if (n != addr_last || !isbinary || !newline_added) 190 s[len++] = '\n'; 191 if (put_stream_line(fp, s, len) < 0) 192 return ERR; 193 size += len; 194 } 195 if (des) { 196 flush_des_file(fp); /* flush buffer */ 197 size += 8 - size % 8; /* adjust DES size */ 198 } 199 return size; 200} 201 202 203/* put_stream_line: write a line of text to a stream; return status */ 204int 205put_stream_line(FILE *fp, const char *s, int len) 206{ 207 while (len--) 208 if ((des ? put_des_char(*s++, fp) : fputc(*s++, fp)) < 0) { 209 fprintf(stderr, "%s\n", strerror(errno)); 210 errmsg = "cannot write file"; 211 return ERR; 212 } 213 return 0; 214} 215 216/* get_extended_line: get an extended line from stdin */ 217char * 218get_extended_line(int *sizep, int nonl) 219{ 220 static char *cvbuf = NULL; /* buffer */ 221 static int cvbufsz = 0; /* buffer size */ 222 223 int l, n; 224 char *t = ibufp; 225 226 while (*t++ != '\n') 227 ; 228 if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) { 229 *sizep = l; 230 return ibufp; 231 } 232 *sizep = -1; 233 REALLOC(cvbuf, cvbufsz, l, NULL); 234 memcpy(cvbuf, ibufp, l); 235 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ 236 if (nonl) l--; /* strip newline */ 237 for (;;) { 238 if ((n = get_tty_line()) < 0) 239 return NULL; 240 else if (n == 0 || ibuf[n - 1] != '\n') { 241 errmsg = "unexpected end-of-file"; 242 return NULL; 243 } 244 REALLOC(cvbuf, cvbufsz, l + n, NULL); 245 memcpy(cvbuf + l, ibuf, n); 246 l += n; 247 if (n < 2 || !has_trailing_escape(cvbuf, cvbuf + l - 1)) 248 break; 249 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ 250 if (nonl) l--; /* strip newline */ 251 } 252 REALLOC(cvbuf, cvbufsz, l + 1, NULL); 253 cvbuf[l] = '\0'; 254 *sizep = l; 255 return cvbuf; 256} 257 258 259/* get_tty_line: read a line of text from stdin; return line length */ 260int 261get_tty_line(void) 262{ 263 int oi = 0; 264 int i = 0; 265 int c; 266 267 for (;;) 268 switch (c = getchar()) { 269 default: 270 oi = 0; 271 REALLOC(ibuf, ibufsz, i + 2, ERR); 272 if (!(ibuf[i++] = c)) isbinary = 1; 273 if (c != '\n') 274 continue; 275 lineno++; 276 ibuf[i] = '\0'; 277 ibufp = ibuf; 278 return i; 279 case EOF: 280 if (ferror(stdin)) { 281 fprintf(stderr, "stdin: %s\n", strerror(errno)); 282 errmsg = "cannot read stdin"; 283 clearerr(stdin); 284 ibufp = NULL; 285 return ERR; 286 } else { 287 clearerr(stdin); 288 if (i != oi) { 289 oi = i; 290 continue; 291 } else if (i) 292 ibuf[i] = '\0'; 293 ibufp = ibuf; 294 return i; 295 } 296 } 297} 298 299 300 301#define ESCAPES "\a\b\f\n\r\t\v\\" 302#define ESCCHARS "abfnrtv\\" 303 304/* put_tty_line: print text to stdout */ 305int 306put_tty_line(const char *s, int l, long n, int gflag) 307{ 308 int col = 0; 309 int lc = 0; 310 char *cp; 311 312 if (gflag & GNP) { 313 printf("%ld\t", n); 314 col = 8; 315 } 316 for (; l--; s++) { 317 if ((gflag & GLS) && ++col > cols) { 318 fputs("\\\n", stdout); 319 col = 1; 320#ifndef BACKWARDS 321 if (!scripted && !isglobal && ++lc > rows) { 322 lc = 0; 323 fputs("Press <RETURN> to continue... ", stdout); 324 fflush(stdout); 325 if (get_tty_line() < 0) 326 return ERR; 327 } 328#endif 329 } 330 if (gflag & GLS) { 331 if (31 < *s && *s < 127 && *s != '\\') 332 putchar(*s); 333 else { 334 putchar('\\'); 335 col++; 336 if (*s && (cp = strchr(ESCAPES, *s)) != NULL) 337 putchar(ESCCHARS[cp - ESCAPES]); 338 else { 339 putchar((((unsigned char) *s & 0300) >> 6) + '0'); 340 putchar((((unsigned char) *s & 070) >> 3) + '0'); 341 putchar(((unsigned char) *s & 07) + '0'); 342 col += 2; 343 } 344 } 345 346 } else 347 putchar(*s); 348 } 349#ifndef BACKWARDS 350 if (gflag & GLS) 351 putchar('$'); 352#endif 353 putchar('\n'); 354 return 0; 355} 356