Imported from ../bash-1.14.7.tar.gz.
This commit is contained in:
Jari Aalto
commit
726f63884d
402 changed files with 150297 additions and 0 deletions
716
lib/termcap/termcap.c
Normal file
716
lib/termcap/termcap.c
Normal file
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@ -0,0 +1,716 @@
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/* Work-alike for termcap, plus extra features.
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Copyright (C) 1985, 1986, 1993 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Emacs config.h may rename various library functions such as malloc. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#else /* not HAVE_CONFIG_H */
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#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
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#define bcopy(s, d, n) memcpy ((d), (s), (n))
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#endif
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#ifdef STDC_HEADERS
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#include <stdlib.h>
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#include <string.h>
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#else
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char *getenv ();
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char *malloc ();
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char *realloc ();
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef _POSIX_VERSION
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#include <fcntl.h>
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#endif
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#endif /* not HAVE_CONFIG_H */
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#ifndef NULL
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#define NULL (char *) 0
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#endif
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/* BUFSIZE is the initial size allocated for the buffer
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for reading the termcap file.
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It is not a limit.
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Make it large normally for speed.
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Make it variable when debugging, so can exercise
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increasing the space dynamically. */
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#ifndef BUFSIZE
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#ifdef DEBUG
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#define BUFSIZE bufsize
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int bufsize = 128;
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#else
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#define BUFSIZE 2048
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#endif
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#endif
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#ifndef emacs
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static void
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memory_out ()
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{
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write (2, "virtual memory exhausted\n", 25);
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exit (1);
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}
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static char *
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xmalloc (size)
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unsigned size;
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{
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register char *tem = malloc (size);
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if (!tem)
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memory_out ();
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return tem;
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}
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static char *
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xrealloc (ptr, size)
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char *ptr;
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unsigned size;
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{
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register char *tem = realloc (ptr, size);
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if (!tem)
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memory_out ();
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return tem;
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}
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#endif /* not emacs */
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/* Looking up capabilities in the entry already found. */
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/* The pointer to the data made by tgetent is left here
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for tgetnum, tgetflag and tgetstr to find. */
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static char *term_entry;
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static char *tgetst1 ();
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/* Search entry BP for capability CAP.
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Return a pointer to the capability (in BP) if found,
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0 if not found. */
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static char *
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find_capability (bp, cap)
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register char *bp, *cap;
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{
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for (; *bp; bp++)
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if (bp[0] == ':'
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&& bp[1] == cap[0]
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&& bp[2] == cap[1])
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return &bp[4];
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return NULL;
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}
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int
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tgetnum (cap)
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char *cap;
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{
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register char *ptr = find_capability (term_entry, cap);
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if (!ptr || ptr[-1] != '#')
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return -1;
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return atoi (ptr);
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}
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int
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tgetflag (cap)
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char *cap;
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{
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register char *ptr = find_capability (term_entry, cap);
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return ptr && ptr[-1] == ':';
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}
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/* Look up a string-valued capability CAP.
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If AREA is non-null, it points to a pointer to a block in which
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to store the string. That pointer is advanced over the space used.
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If AREA is null, space is allocated with `malloc'. */
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char *
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tgetstr (cap, area)
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char *cap;
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char **area;
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{
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register char *ptr = find_capability (term_entry, cap);
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if (!ptr || (ptr[-1] != '=' && ptr[-1] != '~'))
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return NULL;
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return tgetst1 (ptr, area);
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}
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/* Table, indexed by a character in range 0100 to 0140 with 0100 subtracted,
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gives meaning of character following \, or a space if no special meaning.
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Eight characters per line within the string. */
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static char esctab[]
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= " \007\010 \033\014 \
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\012 \
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\015 \011 \013 \
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";
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/* PTR points to a string value inside a termcap entry.
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Copy that value, processing \ and ^ abbreviations,
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into the block that *AREA points to,
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or to newly allocated storage if AREA is NULL.
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Return the address to which we copied the value,
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or NULL if PTR is NULL. */
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static char *
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tgetst1 (ptr, area)
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char *ptr;
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char **area;
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{
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register char *p, *r;
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register int c;
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register int size;
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char *ret;
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register int c1;
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if (!ptr)
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return NULL;
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/* `ret' gets address of where to store the string. */
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if (!area)
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{
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/* Compute size of block needed (may overestimate). */
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p = ptr;
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while ((c = *p++) && c != ':' && c != '\n')
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;
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ret = (char *) xmalloc (p - ptr + 1);
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}
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else
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ret = *area;
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/* Copy the string value, stopping at null or colon.
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Also process ^ and \ abbreviations. */
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p = ptr;
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r = ret;
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while ((c = *p++) && c != ':' && c != '\n')
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{
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if (c == '^')
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c = *p++ & 037;
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else if (c == '\\')
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{
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c = *p++;
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if (c >= '0' && c <= '7')
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{
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c -= '0';
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size = 0;
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while (++size < 3 && (c1 = *p) >= '0' && c1 <= '7')
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{
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c *= 8;
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c += c1 - '0';
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p++;
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}
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}
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else if (c >= 0100 && c < 0200)
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{
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c1 = esctab[(c & ~040) - 0100];
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if (c1 != ' ')
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c = c1;
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}
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}
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*r++ = c;
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}
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*r = '\0';
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/* Update *AREA. */
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if (area)
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*area = r + 1;
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return ret;
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}
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/* Outputting a string with padding. */
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short ospeed;
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/* If OSPEED is 0, we use this as the actual baud rate. */
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int tputs_baud_rate;
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char PC;
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/* Actual baud rate if positive;
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- baud rate / 100 if negative. */
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static short speeds[] =
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{
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#ifdef VMS
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0, 50, 75, 110, 134, 150, -3, -6, -12, -18,
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-20, -24, -36, -48, -72, -96, -192
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#else /* not VMS */
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0, 50, 75, 110, 135, 150, -2, -3, -6, -12,
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-18, -24, -48, -96, -192, -384
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#endif /* not VMS */
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};
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void
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tputs (str, nlines, outfun)
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register char *str;
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int nlines;
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register int (*outfun) ();
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{
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register int padcount = 0;
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register int speed;
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#ifdef emacs
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extern baud_rate;
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speed = baud_rate;
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#else
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if (ospeed == 0)
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speed = tputs_baud_rate;
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else
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speed = speeds[ospeed];
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#endif
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if (!str)
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return;
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while (*str >= '0' && *str <= '9')
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{
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padcount += *str++ - '0';
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padcount *= 10;
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}
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if (*str == '.')
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{
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str++;
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padcount += *str++ - '0';
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}
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if (*str == '*')
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{
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str++;
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padcount *= nlines;
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}
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while (*str)
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(*outfun) (*str++);
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/* padcount is now in units of tenths of msec. */
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padcount *= speeds[ospeed];
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padcount += 500;
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padcount /= 1000;
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if (speeds[ospeed] < 0)
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padcount = -padcount;
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else
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{
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padcount += 50;
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padcount /= 100;
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}
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while (padcount-- > 0)
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(*outfun) (PC);
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}
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/* Finding the termcap entry in the termcap data base. */
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struct buffer
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{
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char *beg;
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int size;
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char *ptr;
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int ateof;
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int full;
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};
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/* Forward declarations of static functions. */
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static int scan_file ();
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static char *gobble_line ();
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static int compare_contin ();
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static int name_match ();
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#ifdef VMS
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#include <rmsdef.h>
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#include <fab.h>
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#include <nam.h>
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static int
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valid_filename_p (fn)
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char *fn;
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{
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struct FAB fab = cc$rms_fab;
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struct NAM nam = cc$rms_nam;
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char esa[NAM$C_MAXRSS];
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fab.fab$l_fna = fn;
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fab.fab$b_fns = strlen(fn);
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fab.fab$l_nam = &nam;
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fab.fab$l_fop = FAB$M_NAM;
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|
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nam.nam$l_esa = esa;
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nam.nam$b_ess = sizeof esa;
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return SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL;
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}
|
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|
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#else /* !VMS */
|
||||
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||||
#define valid_filename_p(fn) (*(fn) == '/')
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|
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#endif /* !VMS */
|
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|
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/* Find the termcap entry data for terminal type NAME
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and store it in the block that BP points to.
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Record its address for future use.
|
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|
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If BP is null, space is dynamically allocated.
|
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|
||||
Return -1 if there is some difficulty accessing the data base
|
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of terminal types,
|
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0 if the data base is accessible but the type NAME is not defined
|
||||
in it, and some other value otherwise. */
|
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|
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int
|
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tgetent (bp, name)
|
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char *bp, *name;
|
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{
|
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register char *termcap_name;
|
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register int fd;
|
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struct buffer buf;
|
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register char *bp1;
|
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char *bp2;
|
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char *term;
|
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int malloc_size = 0;
|
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register int c;
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char *tcenv; /* TERMCAP value, if it contains :tc=. */
|
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char *indirect = NULL; /* Terminal type in :tc= in TERMCAP value. */
|
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int filep;
|
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|
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termcap_name = getenv ("TERMCAP");
|
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if (termcap_name && *termcap_name == '\0')
|
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termcap_name = NULL;
|
||||
|
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filep = termcap_name && valid_filename_p (termcap_name);
|
||||
|
||||
/* If termcap_name is non-null and starts with / (in the un*x case, that is),
|
||||
it is a file name to use instead of /etc/termcap.
|
||||
If it is non-null and does not start with /,
|
||||
it is the entry itself, but only if
|
||||
the name the caller requested matches the TERM variable. */
|
||||
|
||||
if (termcap_name && !filep && !strcmp (name, getenv ("TERM")))
|
||||
{
|
||||
indirect = tgetst1 (find_capability (termcap_name, "tc"), (char **) 0);
|
||||
if (!indirect)
|
||||
{
|
||||
if (!bp)
|
||||
bp = termcap_name;
|
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else
|
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strcpy (bp, termcap_name);
|
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goto ret;
|
||||
}
|
||||
else
|
||||
{ /* It has tc=. Need to read /etc/termcap. */
|
||||
tcenv = termcap_name;
|
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termcap_name = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
if (!termcap_name || !filep)
|
||||
#ifdef VMS
|
||||
termcap_name = "emacs_library:[etc]termcap.dat";
|
||||
#else
|
||||
termcap_name = "/etc/termcap";
|
||||
#endif
|
||||
|
||||
/* Here we know we must search a file and termcap_name has its name. */
|
||||
|
||||
fd = open (termcap_name, 0, 0);
|
||||
if (fd < 0)
|
||||
return -1;
|
||||
|
||||
buf.size = BUFSIZE;
|
||||
/* Add 1 to size to ensure room for terminating null. */
|
||||
buf.beg = (char *) xmalloc (buf.size + 1);
|
||||
term = indirect ? indirect : name;
|
||||
|
||||
if (!bp)
|
||||
{
|
||||
malloc_size = indirect ? strlen (tcenv) + 1 : buf.size;
|
||||
bp = (char *) xmalloc (malloc_size);
|
||||
}
|
||||
bp1 = bp;
|
||||
|
||||
if (indirect)
|
||||
/* Copy the data from the environment variable. */
|
||||
{
|
||||
strcpy (bp, tcenv);
|
||||
bp1 += strlen (tcenv);
|
||||
}
|
||||
|
||||
while (term)
|
||||
{
|
||||
/* Scan the file, reading it via buf, till find start of main entry. */
|
||||
if (scan_file (term, fd, &buf) == 0)
|
||||
{
|
||||
close (fd);
|
||||
free (buf.beg);
|
||||
if (malloc_size)
|
||||
free (bp);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Free old `term' if appropriate. */
|
||||
if (term != name)
|
||||
free (term);
|
||||
|
||||
/* If BP is malloc'd by us, make sure it is big enough. */
|
||||
if (malloc_size)
|
||||
{
|
||||
malloc_size = bp1 - bp + buf.size;
|
||||
termcap_name = (char *) xrealloc (bp, malloc_size);
|
||||
bp1 += termcap_name - bp;
|
||||
bp = termcap_name;
|
||||
}
|
||||
|
||||
bp2 = bp1;
|
||||
|
||||
/* Copy the line of the entry from buf into bp. */
|
||||
termcap_name = buf.ptr;
|
||||
while ((*bp1++ = c = *termcap_name++) && c != '\n')
|
||||
/* Drop out any \ newline sequence. */
|
||||
if (c == '\\' && *termcap_name == '\n')
|
||||
{
|
||||
bp1--;
|
||||
termcap_name++;
|
||||
}
|
||||
*bp1 = '\0';
|
||||
|
||||
/* Does this entry refer to another terminal type's entry?
|
||||
If something is found, copy it into heap and null-terminate it. */
|
||||
term = tgetst1 (find_capability (bp2, "tc"), (char **) 0);
|
||||
}
|
||||
|
||||
close (fd);
|
||||
free (buf.beg);
|
||||
|
||||
if (malloc_size)
|
||||
bp = (char *) xrealloc (bp, bp1 - bp + 1);
|
||||
|
||||
ret:
|
||||
term_entry = bp;
|
||||
if (malloc_size)
|
||||
return (int) bp;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Given file open on FD and buffer BUFP,
|
||||
scan the file from the beginning until a line is found
|
||||
that starts the entry for terminal type STR.
|
||||
Return 1 if successful, with that line in BUFP,
|
||||
or 0 if no entry is found in the file. */
|
||||
|
||||
static int
|
||||
scan_file (str, fd, bufp)
|
||||
char *str;
|
||||
int fd;
|
||||
register struct buffer *bufp;
|
||||
{
|
||||
register char *end;
|
||||
|
||||
bufp->ptr = bufp->beg;
|
||||
bufp->full = 0;
|
||||
bufp->ateof = 0;
|
||||
*bufp->ptr = '\0';
|
||||
|
||||
lseek (fd, 0L, 0);
|
||||
|
||||
while (!bufp->ateof)
|
||||
{
|
||||
/* Read a line into the buffer. */
|
||||
end = NULL;
|
||||
do
|
||||
{
|
||||
/* if it is continued, append another line to it,
|
||||
until a non-continued line ends. */
|
||||
end = gobble_line (fd, bufp, end);
|
||||
}
|
||||
while (!bufp->ateof && end[-2] == '\\');
|
||||
|
||||
if (*bufp->ptr != '#'
|
||||
&& name_match (bufp->ptr, str))
|
||||
return 1;
|
||||
|
||||
/* Discard the line just processed. */
|
||||
bufp->ptr = end;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Return nonzero if NAME is one of the names specified
|
||||
by termcap entry LINE. */
|
||||
|
||||
static int
|
||||
name_match (line, name)
|
||||
char *line, *name;
|
||||
{
|
||||
register char *tem;
|
||||
|
||||
if (!compare_contin (line, name))
|
||||
return 1;
|
||||
/* This line starts an entry. Is it the right one? */
|
||||
for (tem = line; *tem && *tem != '\n' && *tem != ':'; tem++)
|
||||
if (*tem == '|' && !compare_contin (tem + 1, name))
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
compare_contin (str1, str2)
|
||||
register char *str1, *str2;
|
||||
{
|
||||
register int c1, c2;
|
||||
while (1)
|
||||
{
|
||||
c1 = *str1++;
|
||||
c2 = *str2++;
|
||||
while (c1 == '\\' && *str1 == '\n')
|
||||
{
|
||||
str1++;
|
||||
while ((c1 = *str1++) == ' ' || c1 == '\t');
|
||||
}
|
||||
if (c2 == '\0')
|
||||
{
|
||||
/* End of type being looked up. */
|
||||
if (c1 == '|' || c1 == ':')
|
||||
/* If end of name in data base, we win. */
|
||||
return 0;
|
||||
else
|
||||
return 1;
|
||||
}
|
||||
else if (c1 != c2)
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Make sure that the buffer <- BUFP contains a full line
|
||||
of the file open on FD, starting at the place BUFP->ptr
|
||||
points to. Can read more of the file, discard stuff before
|
||||
BUFP->ptr, or make the buffer bigger.
|
||||
|
||||
Return the pointer to after the newline ending the line,
|
||||
or to the end of the file, if there is no newline to end it.
|
||||
|
||||
Can also merge on continuation lines. If APPEND_END is
|
||||
non-null, it points past the newline of a line that is
|
||||
continued; we add another line onto it and regard the whole
|
||||
thing as one line. The caller decides when a line is continued. */
|
||||
|
||||
static char *
|
||||
gobble_line (fd, bufp, append_end)
|
||||
int fd;
|
||||
register struct buffer *bufp;
|
||||
char *append_end;
|
||||
{
|
||||
register char *end;
|
||||
register int nread;
|
||||
register char *buf = bufp->beg;
|
||||
register char *tem;
|
||||
|
||||
if (!append_end)
|
||||
append_end = bufp->ptr;
|
||||
|
||||
while (1)
|
||||
{
|
||||
end = append_end;
|
||||
while (*end && *end != '\n') end++;
|
||||
if (*end)
|
||||
break;
|
||||
if (bufp->ateof)
|
||||
return buf + bufp->full;
|
||||
if (bufp->ptr == buf)
|
||||
{
|
||||
if (bufp->full == bufp->size)
|
||||
{
|
||||
bufp->size *= 2;
|
||||
/* Add 1 to size to ensure room for terminating null. */
|
||||
tem = (char *) xrealloc (buf, bufp->size + 1);
|
||||
bufp->ptr = (bufp->ptr - buf) + tem;
|
||||
append_end = (append_end - buf) + tem;
|
||||
bufp->beg = buf = tem;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
append_end -= bufp->ptr - buf;
|
||||
bcopy (bufp->ptr, buf, bufp->full -= bufp->ptr - buf);
|
||||
bufp->ptr = buf;
|
||||
}
|
||||
if (!(nread = read (fd, buf + bufp->full, bufp->size - bufp->full)))
|
||||
bufp->ateof = 1;
|
||||
bufp->full += nread;
|
||||
buf[bufp->full] = '\0';
|
||||
}
|
||||
return end + 1;
|
||||
}
|
||||
|
||||
#ifdef TEST
|
||||
|
||||
#ifdef NULL
|
||||
#undef NULL
|
||||
#endif
|
||||
|
||||
#include <stdio.h>
|
||||
|
||||
main (argc, argv)
|
||||
int argc;
|
||||
char **argv;
|
||||
{
|
||||
char *term;
|
||||
char *buf;
|
||||
|
||||
term = argv[1];
|
||||
printf ("TERM: %s\n", term);
|
||||
|
||||
buf = (char *) tgetent (0, term);
|
||||
if ((int) buf <= 0)
|
||||
{
|
||||
printf ("No entry.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
printf ("Entry: %s\n", buf);
|
||||
|
||||
tprint ("cm");
|
||||
tprint ("AL");
|
||||
|
||||
printf ("co: %d\n", tgetnum ("co"));
|
||||
printf ("am: %d\n", tgetflag ("am"));
|
||||
}
|
||||
|
||||
tprint (cap)
|
||||
char *cap;
|
||||
{
|
||||
char *x = tgetstr (cap, 0);
|
||||
register char *y;
|
||||
|
||||
printf ("%s: ", cap);
|
||||
if (x)
|
||||
{
|
||||
for (y = x; *y; y++)
|
||||
if (*y <= ' ' || *y == 0177)
|
||||
printf ("\\%0o", *y);
|
||||
else
|
||||
putchar (*y);
|
||||
free (x);
|
||||
}
|
||||
else
|
||||
printf ("none");
|
||||
putchar ('\n');
|
||||
}
|
||||
|
||||
#endif /* TEST */
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue