diff options
Diffstat (limited to 'bin/ed/io.c')
| -rw-r--r-- | bin/ed/io.c | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/bin/ed/io.c b/bin/ed/io.c new file mode 100644 index 000000000000..1907e7a95472 --- /dev/null +++ b/bin/ed/io.c @@ -0,0 +1,355 @@ +/* io.c: This file contains the i/o routines for the ed line editor */ +/*- + * Copyright (c) 1993 Andrew Moore, Talke Studio. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "ed.h" + +/* read_file: read a named file/pipe into the buffer; return line count */ +long +read_file(char *fn, long n) +{ + FILE *fp; + long size; + int cs; + + fp = (*fn == '!') ? popen(fn + 1, "r") : fopen(strip_escapes(fn), "r"); + if (fp == NULL) { + fprintf(stderr, "%s: %s\n", fn, strerror(errno)); + errmsg = "cannot open input file"; + return ERR; + } + if ((size = read_stream(fp, n)) < 0) { + fprintf(stderr, "%s: %s\n", fn, strerror(errno)); + errmsg = "error reading input file"; + } + if ((cs = (*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { + fprintf(stderr, "%s: %s\n", fn, strerror(errno)); + errmsg = "cannot close input file"; + } + if (size < 0 || cs < 0) + return ERR; + if (!scripted) + fprintf(stdout, "%lu\n", size); + return current_addr - n; +} + +static char *sbuf; /* file i/o buffer */ +static int sbufsz; /* file i/o buffer size */ +int newline_added; /* if set, newline appended to input file */ + +/* read_stream: read a stream into the editor buffer; return status */ +long +read_stream(FILE *fp, long n) +{ + line_t *lp = get_addressed_line_node(n); + undo_t *up = NULL; + unsigned long size = 0; + int o_newline_added = newline_added; + int o_isbinary = isbinary; + int appended = (n == addr_last); + int len; + + isbinary = newline_added = 0; + if (des) + init_des_cipher(); + for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) { + SPL1(); + if (put_sbuf_line(sbuf) == NULL) { + SPL0(); + return ERR; + } + lp = lp->q_forw; + if (up) + up->t = lp; + else if ((up = push_undo_stack(UADD, current_addr, + current_addr)) == NULL) { + SPL0(); + return ERR; + } + SPL0(); + } + if (len < 0) + return ERR; + if (appended && size && o_isbinary && o_newline_added) + fputs("newline inserted\n", stderr); + else if (newline_added && (!appended || (!isbinary && !o_isbinary))) + fputs("newline appended\n", stderr); + if (isbinary && newline_added && !appended) + size += 1; + if (!size) + newline_added = 1; + newline_added = appended ? newline_added : o_newline_added; + isbinary = isbinary | o_isbinary; + if (des) + size += 8 - size % 8; /* adjust DES size */ + return size; +} + + +/* get_stream_line: read a line of text from a stream; return line length */ +int +get_stream_line(FILE *fp) +{ + int c; + int i = 0; + + while (((c = des ? get_des_char(fp) : getc(fp)) != EOF || (!feof(fp) && + !ferror(fp))) && c != '\n') { + REALLOC(sbuf, sbufsz, i + 1, ERR); + if (!(sbuf[i++] = c)) + isbinary = 1; + } + REALLOC(sbuf, sbufsz, i + 2, ERR); + if (c == '\n') + sbuf[i++] = c; + else if (ferror(fp)) { + fprintf(stderr, "%s\n", strerror(errno)); + errmsg = "cannot read input file"; + return ERR; + } else if (i) { + sbuf[i++] = '\n'; + newline_added = 1; + } + sbuf[i] = '\0'; + return (isbinary && newline_added && i) ? --i : i; +} + + +/* write_file: write a range of lines to a named file/pipe; return line count */ +long +write_file(char *fn, const char *mode, long n, long m) +{ + FILE *fp; + long size; + int cs; + + fp = (*fn == '!') ? popen(fn+1, "w") : fopen(strip_escapes(fn), mode); + if (fp == NULL) { + fprintf(stderr, "%s: %s\n", fn, strerror(errno)); + errmsg = "cannot open output file"; + return ERR; + } + if ((size = write_stream(fp, n, m)) < 0) { + fprintf(stderr, "%s: %s\n", fn, strerror(errno)); + errmsg = "error writing output file"; + } + if ((cs = (*fn == '!') ? pclose(fp) : fclose(fp)) < 0) { + fprintf(stderr, "%s: %s\n", fn, strerror(errno)); + errmsg = "cannot close output file"; + } + if (size < 0 || cs < 0) + return ERR; + if (!scripted) + fprintf(stdout, "%lu\n", size); + return n ? m - n + 1 : 0; +} + + +/* write_stream: write a range of lines to a stream; return status */ +long +write_stream(FILE *fp, long n, long m) +{ + line_t *lp = get_addressed_line_node(n); + unsigned long size = 0; + char *s; + int len; + + if (des) + init_des_cipher(); + for (; n && n <= m; n++, lp = lp->q_forw) { + if ((s = get_sbuf_line(lp)) == NULL) + return ERR; + len = lp->len; + if (n != addr_last || !isbinary || !newline_added) + s[len++] = '\n'; + if (put_stream_line(fp, s, len) < 0) + return ERR; + size += len; + } + if (des) { + flush_des_file(fp); /* flush buffer */ + size += 8 - size % 8; /* adjust DES size */ + } + return size; +} + + +/* put_stream_line: write a line of text to a stream; return status */ +int +put_stream_line(FILE *fp, const char *s, int len) +{ + while (len--) + if ((des ? put_des_char(*s++, fp) : fputc(*s++, fp)) < 0) { + fprintf(stderr, "%s\n", strerror(errno)); + errmsg = "cannot write file"; + return ERR; + } + return 0; +} + +/* get_extended_line: get an extended line from stdin */ +char * +get_extended_line(int *sizep, int nonl) +{ + static char *cvbuf = NULL; /* buffer */ + static int cvbufsz = 0; /* buffer size */ + + int l, n; + char *t = ibufp; + + while (*t++ != '\n') + ; + if ((l = t - ibufp) < 2 || !has_trailing_escape(ibufp, ibufp + l - 1)) { + *sizep = l; + return ibufp; + } + *sizep = -1; + REALLOC(cvbuf, cvbufsz, l, NULL); + memcpy(cvbuf, ibufp, l); + *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ + if (nonl) l--; /* strip newline */ + for (;;) { + if ((n = get_tty_line()) < 0) + return NULL; + else if (n == 0 || ibuf[n - 1] != '\n') { + errmsg = "unexpected end-of-file"; + return NULL; + } + REALLOC(cvbuf, cvbufsz, l + n, NULL); + memcpy(cvbuf + l, ibuf, n); + l += n; + if (n < 2 || !has_trailing_escape(cvbuf, cvbuf + l - 1)) + break; + *(cvbuf + --l - 1) = '\n'; /* strip trailing esc */ + if (nonl) l--; /* strip newline */ + } + REALLOC(cvbuf, cvbufsz, l + 1, NULL); + cvbuf[l] = '\0'; + *sizep = l; + return cvbuf; +} + + +/* get_tty_line: read a line of text from stdin; return line length */ +int +get_tty_line(void) +{ + int oi = 0; + int i = 0; + int c; + + for (;;) + switch (c = getchar()) { + default: + oi = 0; + REALLOC(ibuf, ibufsz, i + 2, ERR); + if (!(ibuf[i++] = c)) isbinary = 1; + if (c != '\n') + continue; + lineno++; + ibuf[i] = '\0'; + ibufp = ibuf; + return i; + case EOF: + if (ferror(stdin)) { + fprintf(stderr, "stdin: %s\n", strerror(errno)); + errmsg = "cannot read stdin"; + clearerr(stdin); + ibufp = NULL; + return ERR; + } else { + clearerr(stdin); + if (i != oi) { + oi = i; + continue; + } else if (i) + ibuf[i] = '\0'; + ibufp = ibuf; + return i; + } + } +} + + + +#define ESCAPES "\a\b\f\n\r\t\v\\" +#define ESCCHARS "abfnrtv\\" + +/* put_tty_line: print text to stdout */ +int +put_tty_line(const char *s, int l, long n, int gflag) +{ + int col = 0; + int lc = 0; + char *cp; + + if (gflag & GNP) { + printf("%ld\t", n); + col = 8; + } + for (; l--; s++) { + if ((gflag & GLS) && ++col > cols) { + fputs("\\\n", stdout); + col = 1; +#ifndef BACKWARDS + if (!scripted && !isglobal && ++lc > rows) { + lc = 0; + fputs("Press <RETURN> to continue... ", stdout); + fflush(stdout); + if (get_tty_line() < 0) + return ERR; + } +#endif + } + if (gflag & GLS) { + if (31 < *s && *s < 127 && *s != '\\') + putchar(*s); + else { + putchar('\\'); + col++; + if (*s && (cp = strchr(ESCAPES, *s)) != NULL) + putchar(ESCCHARS[cp - ESCAPES]); + else { + putchar((((unsigned char) *s & 0300) >> 6) + '0'); + putchar((((unsigned char) *s & 070) >> 3) + '0'); + putchar(((unsigned char) *s & 07) + '0'); + col += 2; + } + } + + } else + putchar(*s); + } +#ifndef BACKWARDS + if (gflag & GLS) + putchar('$'); +#endif + putchar('\n'); + return 0; +} |