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 * @(#)io.c,v 1.1 1994/02/01 00:34:41 alm Exp 28 * $FreeBSD: src/bin/ed/io.c,v 1.10 1999/08/27 23:14:14 peter Exp $ 29 * $DragonFly: src/bin/ed/io.c,v 1.5 2004/10/30 13:34:49 liamfoy Exp $ 30 */ 31 32 #include "ed.h" 33 34 35 extern int scripted; 36 37 /* read_file: read a named file/pipe into the buffer; return line count */ 38 long 39 read_file(char *fn, long n) 40 { 41 FILE *fp; 42 long size; 43 44 45 fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r"); 46 if (fp == NULL) { 47 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 48 sprintf(errmsg, "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 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 54 sprintf(errmsg, "cannot close input file"); 55 return ERR; 56 } 57 fprintf(stdout, !scripted ? "%lu\n" : "", size); 58 return current_addr - n; 59 } 60 61 62 extern int des; 63 64 char *sbuf; /* file i/o buffer */ 65 int sbufsz; /* file i/o buffer size */ 66 int newline_added; /* if set, newline appended to input file */ 67 68 /* read_stream: read a stream into the editor buffer; return status */ 69 long 70 read_stream(FILE *fp, long n) 71 { 72 line_t *lp = get_addressed_line_node(n); 73 undo_t *up = NULL; 74 unsigned long size = 0; 75 int o_newline_added = newline_added; 76 int o_isbinary = isbinary; 77 int appended = (n == addr_last); 78 int len; 79 80 isbinary = newline_added = 0; 81 if (des) 82 init_des_cipher(); 83 for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) { 84 SPL1(); 85 if (put_sbuf_line(sbuf) == NULL) { 86 SPL0(); 87 return ERR; 88 } 89 lp = lp->q_forw; 90 if (up) 91 up->t = lp; 92 else if ((up = push_undo_stack(UADD, current_addr, 93 current_addr)) == NULL) { 94 SPL0(); 95 return ERR; 96 } 97 SPL0(); 98 } 99 if (len < 0) 100 return ERR; 101 if (appended && size && o_isbinary && o_newline_added) 102 fputs("newline inserted\n", stderr); 103 else if (newline_added && (!appended || (!isbinary && !o_isbinary))) 104 fputs("newline appended\n", stderr); 105 if (isbinary && newline_added && !appended) 106 size += 1; 107 if (!size) 108 newline_added = 1; 109 newline_added = appended ? newline_added : o_newline_added; 110 isbinary = isbinary | o_isbinary; 111 if (des) 112 size += 8 - size % 8; /* adjust DES size */ 113 return size; 114 } 115 116 117 /* get_stream_line: read a line of text from a stream; return line length */ 118 int 119 get_stream_line(FILE *fp) 120 { 121 int c; 122 int i = 0; 123 124 while (((c = des ? get_des_char(fp) : getc(fp)) != EOF || (!feof(fp) && 125 !ferror(fp))) && c != '\n') { 126 REALLOC(sbuf, sbufsz, i + 1, ERR); 127 if (!(sbuf[i++] = c)) 128 isbinary = 1; 129 } 130 REALLOC(sbuf, sbufsz, i + 2, ERR); 131 if (c == '\n') 132 sbuf[i++] = c; 133 else if (ferror(fp)) { 134 fprintf(stderr, "%s\n", strerror(errno)); 135 sprintf(errmsg, "cannot read input file"); 136 return ERR; 137 } else if (i) { 138 sbuf[i++] = '\n'; 139 newline_added = 1; 140 } 141 sbuf[i] = '\0'; 142 return (isbinary && newline_added && i) ? --i : i; 143 } 144 145 146 /* write_file: write a range of lines to a named file/pipe; return line count */ 147 long 148 write_file(const char *fn, const char *mode, long n, long m) 149 { 150 FILE *fp; 151 long size; 152 153 fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode); 154 if (fp == NULL) { 155 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 156 sprintf(errmsg, "cannot open output file"); 157 return ERR; 158 } else if ((size = write_stream(fp, n, m)) < 0) 159 return ERR; 160 else if (((*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { 161 fprintf(stderr, "%s: %s\n", fn, strerror(errno)); 162 sprintf(errmsg, "cannot close output file"); 163 return ERR; 164 } 165 fprintf(stdout, !scripted ? "%lu\n" : "", size); 166 return n ? m - n + 1 : 0; 167 } 168 169 170 /* write_stream: write a range of lines to a stream; return status */ 171 long 172 write_stream(FILE *fp, long n, long m) 173 { 174 line_t *lp = get_addressed_line_node(n); 175 unsigned long size = 0; 176 char *s; 177 int len; 178 179 if (des) 180 init_des_cipher(); 181 for (; n && n <= m; n++, lp = lp->q_forw) { 182 if ((s = get_sbuf_line(lp)) == NULL) 183 return ERR; 184 len = lp->len; 185 if (n != addr_last || !isbinary || !newline_added) 186 s[len++] = '\n'; 187 if (put_stream_line(fp, s, len) < 0) 188 return ERR; 189 size += len; 190 } 191 if (des) { 192 flush_des_file(fp); /* flush buffer */ 193 size += 8 - size % 8; /* adjust DES size */ 194 } 195 return size; 196 } 197 198 199 /* put_stream_line: write a line of text to a stream; return status */ 200 int 201 put_stream_line(FILE *fp, char *s, int len) 202 { 203 while (len--) 204 if ((des ? put_des_char(*s++, fp) : fputc(*s++, fp)) < 0) { 205 fprintf(stderr, "%s\n", strerror(errno)); 206 sprintf(errmsg, "cannot write file"); 207 return ERR; 208 } 209 return 0; 210 } 211 212 /* get_extended_line: get a an extended line from stdin */ 213 char * 214 get_extended_line(int *sizep, int nonl) 215 { 216 static char *cvbuf = NULL; /* buffer */ 217 static int cvbufsz = 0; /* buffer size */ 218 219 int l, n; 220 char *t = ibufp; 221 222 while (*t++ != '\n') 223 ; 224 if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) { 225 *sizep = l; 226 return ibufp; 227 } 228 *sizep = -1; 229 REALLOC(cvbuf, cvbufsz, l, NULL); 230 memcpy(cvbuf, ibufp, l); 231 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ 232 if (nonl) l--; /* strip newline */ 233 for (;;) { 234 if ((n = get_tty_line()) < 0) 235 return NULL; 236 else if (n == 0 || ibuf[n - 1] != '\n') { 237 sprintf(errmsg, "unexpected end-of-file"); 238 return NULL; 239 } 240 REALLOC(cvbuf, cvbufsz, l + n, NULL); 241 memcpy(cvbuf + l, ibuf, n); 242 l += n; 243 if (n < 2 || !has_trailing_escape(cvbuf, cvbuf + l - 1)) 244 break; 245 *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ 246 if (nonl) l--; /* strip newline */ 247 } 248 REALLOC(cvbuf, cvbufsz, l + 1, NULL); 249 cvbuf[l] = '\0'; 250 *sizep = l; 251 return cvbuf; 252 } 253 254 255 /* get_tty_line: read a line of text from stdin; return line length */ 256 int 257 get_tty_line(void) 258 { 259 int oi = 0; 260 int i = 0; 261 int c; 262 263 for (;;) 264 switch (c = getchar()) { 265 default: 266 oi = 0; 267 REALLOC(ibuf, ibufsz, i + 2, ERR); 268 if (!(ibuf[i++] = c)) isbinary = 1; 269 if (c != '\n') 270 continue; 271 lineno++; 272 ibuf[i] = '\0'; 273 ibufp = ibuf; 274 return i; 275 case EOF: 276 if (ferror(stdin)) { 277 fprintf(stderr, "stdin: %s\n", strerror(errno)); 278 sprintf(errmsg, "cannot read stdin"); 279 clearerr(stdin); 280 ibufp = NULL; 281 return ERR; 282 } else { 283 clearerr(stdin); 284 if (i != oi) { 285 oi = i; 286 continue; 287 } else if (i) 288 ibuf[i] = '\0'; 289 ibufp = ibuf; 290 return i; 291 } 292 } 293 } 294 295 296 297 #define ESCAPES "\a\b\f\n\r\t\v\\" 298 #define ESCCHARS "abfnrtv\\" 299 300 extern int rows; 301 extern int cols; 302 303 /* put_tty_line: print text to stdout */ 304 int 305 put_tty_line(char *s, int l, long n, int gflag) 306 { 307 int col = 0; 308 int lc = 0; 309 char *cp; 310 311 if (gflag & GNP) { 312 printf("%ld\t", n); 313 col = 8; 314 } 315 for (; l--; s++) { 316 if ((gflag & GLS) && ++col > cols) { 317 fputs("\\\n", stdout); 318 col = 1; 319 #ifndef BACKWARDS 320 if (!scripted && !isglobal && ++lc > rows) { 321 lc = 0; 322 fputs("Press <RETURN> to continue... ", stdout); 323 fflush(stdout); 324 if (get_tty_line() < 0) 325 return ERR; 326 } 327 #endif 328 } 329 if (gflag & GLS) { 330 if (31 < *s && *s < 127 && *s != '\\') 331 putchar(*s); 332 else { 333 putchar('\\'); 334 col++; 335 if (*s && (cp = strchr(ESCAPES, *s)) != NULL) 336 putchar(ESCCHARS[cp - ESCAPES]); 337 else { 338 putchar((((unsigned char) *s & 0300) >> 6) + '0'); 339 putchar((((unsigned char) *s & 070) >> 3) + '0'); 340 putchar(((unsigned char) *s & 07) + '0'); 341 col += 2; 342 } 343 } 344 345 } else 346 putchar(*s); 347 } 348 #ifndef BACKWARDS 349 if (gflag & GLS) 350 putchar('$'); 351 #endif 352 putchar('\n'); 353 return 0; 354 } 355