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 28 #ifndef lint 29 #if 0 30 static char * const rcsid = "@(#)io.c,v 1.1 1994/02/01 00:34:41 alm Exp"; 31 #else 32 static char * const rcsid = 33 "$FreeBSD$"; 34 #endif 35 #endif /* not lint */ 36 37 #include "ed.h" 38 39 40 extern int scripted; 41 42 /* read_file: read a named file/pipe into the buffer; return line count */ 43 long 44 read_file(fn, n) 45 char *fn; 46 long n; 47 { 48 FILE *fp; 49 long size; 50 51 52 fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r"); 53 if (fp == NULL) { 54 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 55 sprintf(errmsg, "cannot open input file"); 56 return ERR; 57 } else if ((size = read_stream(fp, n)) < 0) 58 return ERR; 59 else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { 60 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 61 sprintf(errmsg, "cannot close input file"); 62 return ERR; 63 } 64 fprintf(stdout, !scripted ? "%lu\n" : "", size); 65 return current_addr - n; 66 } 67 68 69 extern int des; 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 long 77 read_stream(fp, n) 78 FILE *fp; 79 long n; 80 { 81 line_t *lp = get_addressed_line_node(n); 82 undo_t *up = NULL; 83 unsigned long size = 0; 84 int o_newline_added = newline_added; 85 int o_isbinary = isbinary; 86 int appended = (n == addr_last); 87 int len; 88 89 isbinary = newline_added = 0; 90 if (des) 91 init_des_cipher(); 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 if (des) 121 size += 8 - size % 8; /* adjust DES size */ 122 return size; 123 } 124 125 126 /* get_stream_line: read a line of text from a stream; return line length */ 127 int 128 get_stream_line(fp) 129 FILE *fp; 130 { 131 register int c; 132 register int i = 0; 133 134 while (((c = des ? get_des_char(fp) : getc(fp)) != EOF || (!feof(fp) && 135 !ferror(fp))) && c != '\n') { 136 REALLOC(sbuf, sbufsz, i + 1, ERR); 137 if (!(sbuf[i++] = c)) 138 isbinary = 1; 139 } 140 REALLOC(sbuf, sbufsz, i + 2, ERR); 141 if (c == '\n') 142 sbuf[i++] = c; 143 else if (ferror(fp)) { 144 fprintf(stderr, "%s\n", strerror(errno)); 145 sprintf(errmsg, "cannot read input file"); 146 return ERR; 147 } else if (i) { 148 sbuf[i++] = '\n'; 149 newline_added = 1; 150 } 151 sbuf[i] = '\0'; 152 return (isbinary && newline_added && i) ? --i : i; 153 } 154 155 156 /* write_file: write a range of lines to a named file/pipe; return line count */ 157 long 158 write_file(fn, mode, n, m) 159 char *fn; 160 char *mode; 161 long n; 162 long m; 163 { 164 FILE *fp; 165 long size; 166 167 fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode); 168 if (fp == NULL) { 169 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 170 sprintf(errmsg, "cannot open output file"); 171 return ERR; 172 } else if ((size = write_stream(fp, n, m)) < 0) 173 return ERR; 174 else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { 175 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 176 sprintf(errmsg, "cannot close output file"); 177 return ERR; 178 } 179 fprintf(stdout, !scripted ? "%lu\n" : "", size); 180 return n ? m - n + 1 : 0; 181 } 182 183 184 /* write_stream: write a range of lines to a stream; return status */ 185 long 186 write_stream(fp, n, m) 187 FILE *fp; 188 long n; 189 long m; 190 { 191 line_t *lp = get_addressed_line_node(n); 192 unsigned long size = 0; 193 char *s; 194 int len; 195 196 if (des) 197 init_des_cipher(); 198 for (; n && n <= m; n++, lp = lp->q_forw) { 199 if ((s = get_sbuf_line(lp)) == NULL) 200 return ERR; 201 len = lp->len; 202 if (n != addr_last || !isbinary || !newline_added) 203 s[len++] = '\n'; 204 if (put_stream_line(fp, s, len) < 0) 205 return ERR; 206 size += len; 207 } 208 if (des) { 209 flush_des_file(fp); /* flush buffer */ 210 size += 8 - size % 8; /* adjust DES size */ 211 } 212 return size; 213 } 214 215 216 /* put_stream_line: write a line of text to a stream; return status */ 217 int 218 put_stream_line(fp, s, len) 219 FILE *fp; 220 char *s; 221 int len; 222 { 223 while (len--) 224 if ((des ? put_des_char(*s++, fp) : fputc(*s++, fp)) < 0) { 225 fprintf(stderr, "%s\n", strerror(errno)); 226 sprintf(errmsg, "cannot write file"); 227 return ERR; 228 } 229 return 0; 230 } 231 232 /* get_extended_line: get a an extended line from stdin */ 233 char * 234 get_extended_line(sizep, nonl) 235 int *sizep; 236 int nonl; 237 { 238 static char *cvbuf = NULL; /* buffer */ 239 static int cvbufsz = 0; /* buffer size */ 240 241 int l, n; 242 char *t = ibufp; 243 244 while (*t++ != '\n') 245 ; 246 if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) { 247 *sizep = l; 248 return ibufp; 249 } 250 *sizep = -1; 251 REALLOC(cvbuf, cvbufsz, l, NULL); 252 memcpy(cvbuf, ibufp, l); 253 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ 254 if (nonl) l--; /* strip newline */ 255 for (;;) { 256 if ((n = get_tty_line()) < 0) 257 return NULL; 258 else if (n == 0 || ibuf[n - 1] != '\n') { 259 sprintf(errmsg, "unexpected end-of-file"); 260 return NULL; 261 } 262 REALLOC(cvbuf, cvbufsz, l + n, NULL); 263 memcpy(cvbuf + l, ibuf, n); 264 l += n; 265 if (n < 2 || !has_trailing_escape(cvbuf, cvbuf + l - 1)) 266 break; 267 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ 268 if (nonl) l--; /* strip newline */ 269 } 270 REALLOC(cvbuf, cvbufsz, l + 1, NULL); 271 cvbuf[l] = '\0'; 272 *sizep = l; 273 return cvbuf; 274 } 275 276 277 /* get_tty_line: read a line of text from stdin; return line length */ 278 int 279 get_tty_line() 280 { 281 register int oi = 0; 282 register int i = 0; 283 int c; 284 285 for (;;) 286 switch (c = getchar()) { 287 default: 288 oi = 0; 289 REALLOC(ibuf, ibufsz, i + 2, ERR); 290 if (!(ibuf[i++] = c)) isbinary = 1; 291 if (c != '\n') 292 continue; 293 lineno++; 294 ibuf[i] = '\0'; 295 ibufp = ibuf; 296 return i; 297 case EOF: 298 if (ferror(stdin)) { 299 fprintf(stderr, "stdin: %s\n", strerror(errno)); 300 sprintf(errmsg, "cannot read stdin"); 301 clearerr(stdin); 302 ibufp = NULL; 303 return ERR; 304 } else { 305 clearerr(stdin); 306 if (i != oi) { 307 oi = i; 308 continue; 309 } else if (i) 310 ibuf[i] = '\0'; 311 ibufp = ibuf; 312 return i; 313 } 314 } 315 } 316 317 318 319 #define ESCAPES "\a\b\f\n\r\t\v\\" 320 #define ESCCHARS "abfnrtv\\" 321 322 extern int rows; 323 extern int cols; 324 325 /* put_tty_line: print text to stdout */ 326 int 327 put_tty_line(s, l, n, gflag) 328 char *s; 329 int l; 330 long n; 331 int gflag; 332 { 333 int col = 0; 334 int lc = 0; 335 char *cp; 336 337 if (gflag & GNP) { 338 printf("%ld\t", n); 339 col = 8; 340 } 341 for (; l--; s++) { 342 if ((gflag & GLS) && ++col > cols) { 343 fputs("\\\n", stdout); 344 col = 1; 345 #ifndef BACKWARDS 346 if (!scripted && !isglobal && ++lc > rows) { 347 lc = 0; 348 fputs("Press <RETURN> to continue... ", stdout); 349 fflush(stdout); 350 if (get_tty_line() < 0) 351 return ERR; 352 } 353 #endif 354 } 355 if (gflag & GLS) { 356 if (31 < *s && *s < 127 && *s != '\\') 357 putchar(*s); 358 else { 359 putchar('\\'); 360 col++; 361 if (*s && (cp = strchr(ESCAPES, *s)) != NULL) 362 putchar(ESCCHARS[cp - ESCAPES]); 363 else { 364 putchar((((unsigned char) *s & 0300) >> 6) + '0'); 365 putchar((((unsigned char) *s & 070) >> 3) + '0'); 366 putchar(((unsigned char) *s & 07) + '0'); 367 col += 2; 368 } 369 } 370 371 } else 372 putchar(*s); 373 } 374 #ifndef BACKWARDS 375 if (gflag & GLS) 376 putchar('$'); 377 #endif 378 putchar('\n'); 379 return 0; 380 } 381