1 /* io.c: This file contains the i/o routines for the ed line editor */ 2 /*- 3 * Copyright (c) 1993 Andrew Moore, Talke Studio. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $Id: io.c,v 1.3 1994/09/24 02:55:27 davidg Exp $ 28 */ 29 30 #ifndef lint 31 static char *rcsid = "@(#)io.c,v 1.1 1994/02/01 00:34:41 alm Exp"; 32 #endif /* not lint */ 33 34 #include "ed.h" 35 36 37 extern int scripted; 38 39 /* read_file: read a named file/pipe into the buffer; return line count */ 40 long 41 read_file(fn, n) 42 char *fn; 43 long n; 44 { 45 FILE *fp; 46 long size; 47 48 49 fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r"); 50 if (fp == NULL) { 51 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 52 sprintf(errmsg, "cannot open input file"); 53 return ERR; 54 } else if ((size = read_stream(fp, n)) < 0) 55 return ERR; 56 else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { 57 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 58 sprintf(errmsg, "cannot close input file"); 59 return ERR; 60 } 61 fprintf(stderr, !scripted ? "%lu\n" : "", size); 62 return current_addr - n; 63 } 64 65 66 extern int des; 67 68 char *sbuf; /* file i/o buffer */ 69 int sbufsz; /* file i/o buffer size */ 70 int newline_added; /* if set, newline appended to input file */ 71 72 /* read_stream: read a stream into the editor buffer; return status */ 73 long 74 read_stream(fp, n) 75 FILE *fp; 76 long n; 77 { 78 line_t *lp = get_addressed_line_node(n); 79 undo_t *up = NULL; 80 unsigned long size = 0; 81 int o_newline_added = newline_added; 82 int o_isbinary = isbinary; 83 int appended = (n == addr_last); 84 int len; 85 86 isbinary = newline_added = 0; 87 if (des) 88 init_des_cipher(); 89 for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) { 90 SPL1(); 91 if (put_sbuf_line(sbuf) == NULL) { 92 SPL0(); 93 return ERR; 94 } 95 lp = lp->q_forw; 96 if (up) 97 up->t = lp; 98 else if ((up = push_undo_stack(UADD, current_addr, 99 current_addr)) == NULL) { 100 SPL0(); 101 return ERR; 102 } 103 SPL0(); 104 } 105 if (len < 0) 106 return ERR; 107 if (appended && size && o_isbinary && o_newline_added) 108 fputs("newline inserted\n", stderr); 109 else if (newline_added && (!appended || (!isbinary && !o_isbinary))) 110 fputs("newline appended\n", stderr); 111 if (isbinary && newline_added && !appended) 112 size += 1; 113 if (!size) 114 newline_added = 1; 115 newline_added = appended ? newline_added : o_newline_added; 116 isbinary = isbinary | o_isbinary; 117 if (des) 118 size += 8 - size % 8; /* adjust DES size */ 119 return size; 120 } 121 122 123 /* get_stream_line: read a line of text from a stream; return line length */ 124 int 125 get_stream_line(fp) 126 FILE *fp; 127 { 128 register int c; 129 register int i = 0; 130 131 while (((c = des ? get_des_char(fp) : getc(fp)) != EOF || (!feof(fp) && 132 !ferror(fp))) && c != '\n') { 133 REALLOC(sbuf, sbufsz, i + 1, ERR); 134 if (!(sbuf[i++] = c)) 135 isbinary = 1; 136 } 137 REALLOC(sbuf, sbufsz, i + 2, ERR); 138 if (c == '\n') 139 sbuf[i++] = c; 140 else if (ferror(fp)) { 141 fprintf(stderr, "%s\n", strerror(errno)); 142 sprintf(errmsg, "cannot read input file"); 143 return ERR; 144 } else if (i) { 145 sbuf[i++] = '\n'; 146 newline_added = 1; 147 } 148 sbuf[i] = '\0'; 149 return (isbinary && newline_added && i) ? --i : i; 150 } 151 152 153 /* write_file: write a range of lines to a named file/pipe; return line count */ 154 long 155 write_file(fn, mode, n, m) 156 char *fn; 157 char *mode; 158 long n; 159 long m; 160 { 161 FILE *fp; 162 long size; 163 164 fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode); 165 if (fp == NULL) { 166 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 167 sprintf(errmsg, "cannot open output file"); 168 return ERR; 169 } else if ((size = write_stream(fp, n, m)) < 0) 170 return ERR; 171 else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { 172 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 173 sprintf(errmsg, "cannot close output file"); 174 return ERR; 175 } 176 fprintf(stderr, !scripted ? "%lu\n" : "", size); 177 return n ? m - n + 1 : 0; 178 } 179 180 181 /* write_stream: write a range of lines to a stream; return status */ 182 long 183 write_stream(fp, n, m) 184 FILE *fp; 185 long n; 186 long m; 187 { 188 line_t *lp = get_addressed_line_node(n); 189 unsigned long size = 0; 190 char *s; 191 int len; 192 193 if (des) 194 init_des_cipher(); 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 if (des) { 206 flush_des_file(fp); /* flush buffer */ 207 size += 8 - size % 8; /* adjust DES size */ 208 } 209 return size; 210 } 211 212 213 /* put_stream_line: write a line of text to a stream; return status */ 214 int 215 put_stream_line(fp, s, len) 216 FILE *fp; 217 char *s; 218 int len; 219 { 220 while (len--) 221 if ((des ? put_des_char(*s++, fp) : fputc(*s++, fp)) < 0) { 222 fprintf(stderr, "%s\n", strerror(errno)); 223 sprintf(errmsg, "cannot write file"); 224 return ERR; 225 } 226 return 0; 227 } 228 229 /* get_extended_line: get a an extended line from stdin */ 230 char * 231 get_extended_line(sizep, nonl) 232 int *sizep; 233 int nonl; 234 { 235 static char *cvbuf = NULL; /* buffer */ 236 static int cvbufsz = 0; /* buffer size */ 237 238 int l, n; 239 char *t = ibufp; 240 241 while (*t++ != '\n') 242 ; 243 if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) { 244 *sizep = l; 245 return ibufp; 246 } 247 *sizep = -1; 248 REALLOC(cvbuf, cvbufsz, l, NULL); 249 memcpy(cvbuf, ibufp, l); 250 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ 251 if (nonl) 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 sprintf(errmsg, "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 276 get_tty_line() 277 { 278 register int oi = 0; 279 register 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 fprintf(stderr, "stdin: %s\n", strerror(errno)); 297 sprintf(errmsg, "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 324 put_tty_line(s, l, n, gflag) 325 char *s; 326 int l; 327 long n; 328 int gflag; 329 { 330 int col = 0; 331 int lc = 0; 332 char *cp; 333 334 if (gflag & GNP) { 335 printf("%ld\t", n); 336 col = 8; 337 } 338 for (; l--; s++) { 339 if ((gflag & GLS) && ++col > cols) { 340 fputs("\\\n", stdout); 341 col = 1; 342 #ifndef BACKWARDS 343 if (!scripted && !isglobal && ++lc > rows) { 344 lc = 0; 345 fputs("Press <RETURN> to continue... ", stdout); 346 fflush(stdout); 347 if (get_tty_line() < 0) 348 return ERR; 349 } 350 #endif 351 } 352 if (gflag & GLS) { 353 if (31 < *s && *s < 127 && *s != '\\') 354 putchar(*s); 355 else { 356 putchar('\\'); 357 col++; 358 if (*s && (cp = strchr(ESCAPES, *s)) != NULL) 359 putchar(ESCCHARS[cp - ESCAPES]); 360 else { 361 putchar((((unsigned char) *s & 0300) >> 6) + '0'); 362 putchar((((unsigned char) *s & 070) >> 3) + '0'); 363 putchar(((unsigned char) *s & 07) + '0'); 364 col += 2; 365 } 366 } 367 368 } else 369 putchar(*s); 370 } 371 #ifndef BACKWARDS 372 if (gflag & GLS) 373 putchar('$'); 374 #endif 375 putchar('\n'); 376 return 0; 377 } 378