a5f0fb151d
distributed under your choice of the GPL or a BSD style license. Reviewed by: peter Obtained from: http://home.flash.net/~marknu/less/
531 lines
8.3 KiB
C
531 lines
8.3 KiB
C
/*
|
|
* Copyright (C) 1984-2000 Mark Nudelman
|
|
*
|
|
* You may distribute under the terms of either the GNU General Public
|
|
* License or the Less License, as specified in the README file.
|
|
*
|
|
* For more information about less, or for information on how to
|
|
* contact the author, see the README file.
|
|
*/
|
|
|
|
|
|
/*
|
|
* Handling functions for command line options.
|
|
*
|
|
* Most options are handled by the generic code in option.c.
|
|
* But all string options, and a few non-string options, require
|
|
* special handling specific to the particular option.
|
|
* This special processing is done by the "handling functions" in this file.
|
|
*
|
|
* Each handling function is passed a "type" and, if it is a string
|
|
* option, the string which should be "assigned" to the option.
|
|
* The type may be one of:
|
|
* INIT The option is being initialized from the command line.
|
|
* TOGGLE The option is being changed from within the program.
|
|
* QUERY The setting of the option is merely being queried.
|
|
*/
|
|
|
|
#include "less.h"
|
|
#include "option.h"
|
|
|
|
extern int nbufs;
|
|
extern int cbufs;
|
|
extern int pr_type;
|
|
extern int plusoption;
|
|
extern int swindow;
|
|
extern int sc_height;
|
|
extern int secure;
|
|
extern int dohelp;
|
|
extern int any_display;
|
|
extern char openquote;
|
|
extern char closequote;
|
|
extern char *prproto[];
|
|
extern char *eqproto;
|
|
extern char *hproto;
|
|
extern IFILE curr_ifile;
|
|
extern char version[];
|
|
#if LOGFILE
|
|
extern char *namelogfile;
|
|
extern int force_logfile;
|
|
extern int logfile;
|
|
#endif
|
|
#if TAGS
|
|
public char *tagoption = NULL;
|
|
extern char *tags;
|
|
extern int jump_sline;
|
|
#endif
|
|
#if MSDOS_COMPILER
|
|
extern int nm_fg_color, nm_bg_color;
|
|
extern int bo_fg_color, bo_bg_color;
|
|
extern int ul_fg_color, ul_bg_color;
|
|
extern int so_fg_color, so_bg_color;
|
|
extern int bl_fg_color, bl_bg_color;
|
|
#endif
|
|
|
|
|
|
#if LOGFILE
|
|
/*
|
|
* Handler for -o option.
|
|
*/
|
|
public void
|
|
opt_o(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
PARG parg;
|
|
|
|
if (secure)
|
|
{
|
|
error("log file support is not available", NULL_PARG);
|
|
return;
|
|
}
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
namelogfile = s;
|
|
break;
|
|
case TOGGLE:
|
|
if (ch_getflags() & CH_CANSEEK)
|
|
{
|
|
error("Input is not a pipe", NULL_PARG);
|
|
return;
|
|
}
|
|
if (logfile >= 0)
|
|
{
|
|
error("Log file is already in use", NULL_PARG);
|
|
return;
|
|
}
|
|
s = skipsp(s);
|
|
namelogfile = lglob(s);
|
|
use_logfile(namelogfile);
|
|
sync_logfile();
|
|
break;
|
|
case QUERY:
|
|
if (logfile < 0)
|
|
error("No log file", NULL_PARG);
|
|
else
|
|
{
|
|
parg.p_string = unquote_file(namelogfile);
|
|
error("Log file \"%s\"", &parg);
|
|
free(parg.p_string);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for -O option.
|
|
*/
|
|
public void
|
|
opt__O(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
force_logfile = TRUE;
|
|
opt_o(type, s);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Handlers for -l option.
|
|
*/
|
|
public void
|
|
opt_l(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
int err;
|
|
int n;
|
|
char *t;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
t = s;
|
|
n = getnum(&t, 'l', &err);
|
|
if (err || n <= 0)
|
|
{
|
|
error("Line number is required after -l", NULL_PARG);
|
|
return;
|
|
}
|
|
plusoption = TRUE;
|
|
ungetsc(s);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if USERFILE
|
|
public void
|
|
opt_k(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
PARG parg;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
if (lesskey(s, 0))
|
|
{
|
|
parg.p_string = unquote_file(s);
|
|
error("Cannot use lesskey file \"%s\"", &parg);
|
|
free(parg.p_string);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if TAGS
|
|
/*
|
|
* Handler for -t option.
|
|
*/
|
|
public void
|
|
opt_t(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
IFILE save_ifile;
|
|
POSITION pos;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
tagoption = s;
|
|
/* Do the rest in main() */
|
|
break;
|
|
case TOGGLE:
|
|
if (secure)
|
|
{
|
|
error("tags support is not available", NULL_PARG);
|
|
break;
|
|
}
|
|
findtag(skipsp(s));
|
|
save_ifile = save_curr_ifile();
|
|
if (edit_tagfile())
|
|
break;
|
|
if ((pos = tagsearch()) == NULL_POSITION)
|
|
{
|
|
reedit_ifile(save_ifile);
|
|
break;
|
|
}
|
|
unsave_ifile(save_ifile);
|
|
jump_loc(pos, jump_sline);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for -T option.
|
|
*/
|
|
public void
|
|
opt__T(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
PARG parg;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
tags = s;
|
|
break;
|
|
case TOGGLE:
|
|
s = skipsp(s);
|
|
tags = lglob(s);
|
|
break;
|
|
case QUERY:
|
|
parg.p_string = unquote_file(tags);
|
|
error("Tags file \"%s\"", &parg);
|
|
free(parg.p_string);
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Handler for -p option.
|
|
*/
|
|
public void
|
|
opt_p(type, s)
|
|
int type;
|
|
register char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
/*
|
|
* Unget a search command for the specified string.
|
|
* {{ This won't work if the "/" command is
|
|
* changed or invalidated by a .lesskey file. }}
|
|
*/
|
|
plusoption = TRUE;
|
|
ungetsc(s);
|
|
ungetsc("/");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for -P option.
|
|
*/
|
|
public void
|
|
opt__P(type, s)
|
|
int type;
|
|
register char *s;
|
|
{
|
|
register char **proto;
|
|
PARG parg;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
case TOGGLE:
|
|
/*
|
|
* Figure out which prototype string should be changed.
|
|
*/
|
|
switch (*s)
|
|
{
|
|
case 's': proto = &prproto[PR_SHORT]; s++; break;
|
|
case 'm': proto = &prproto[PR_MEDIUM]; s++; break;
|
|
case 'M': proto = &prproto[PR_LONG]; s++; break;
|
|
case '=': proto = &eqproto; s++; break;
|
|
case 'h': proto = &hproto; s++; break;
|
|
default: proto = &prproto[PR_SHORT]; break;
|
|
}
|
|
free(*proto);
|
|
*proto = save(s);
|
|
break;
|
|
case QUERY:
|
|
parg.p_string = prproto[pr_type];
|
|
error("%s", &parg);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the -b option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_b(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case TOGGLE:
|
|
case QUERY:
|
|
/*
|
|
* Allocate the new number of buffers.
|
|
*/
|
|
cbufs = ch_nbuf(cbufs);
|
|
break;
|
|
case INIT:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the -i option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_i(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case TOGGLE:
|
|
chg_caseless();
|
|
break;
|
|
case QUERY:
|
|
case INIT:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the -V option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt__V(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case TOGGLE:
|
|
case QUERY:
|
|
dispversion();
|
|
break;
|
|
case INIT:
|
|
/*
|
|
* Force output to stdout per GNU standard for --version output.
|
|
*/
|
|
any_display = 1;
|
|
putstr("less ");
|
|
putstr(version);
|
|
putstr("\nCopyright (C) 2000 Mark Nudelman\n\n");
|
|
putstr("less comes with NO WARRANTY, to the extent permitted by law.\n");
|
|
putstr("For information about the terms of redistribution,\n");
|
|
putstr("see the file named README in the less distribution.\n");
|
|
quit(QUIT_OK);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if MSDOS_COMPILER
|
|
/*
|
|
* Parse an MSDOS color descriptor.
|
|
*/
|
|
static void
|
|
colordesc(s, fg_color, bg_color)
|
|
char *s;
|
|
int *fg_color;
|
|
int *bg_color;
|
|
{
|
|
int fg, bg;
|
|
int err;
|
|
|
|
fg = getnum(&s, 'D', &err);
|
|
if (err)
|
|
{
|
|
error("Missing fg color in -D", NULL_PARG);
|
|
return;
|
|
}
|
|
if (*s != '.')
|
|
bg = 0;
|
|
else
|
|
{
|
|
s++;
|
|
bg = getnum(&s, 'D', &err);
|
|
if (err)
|
|
{
|
|
error("Missing fg color in -D", NULL_PARG);
|
|
return;
|
|
}
|
|
}
|
|
if (*s != '\0')
|
|
error("Extra characters at end of -D option", NULL_PARG);
|
|
*fg_color = fg;
|
|
*bg_color = bg;
|
|
}
|
|
|
|
/*
|
|
* Handler for the -D option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_D(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
case TOGGLE:
|
|
switch (*s++)
|
|
{
|
|
case 'n':
|
|
colordesc(s, &nm_fg_color, &nm_bg_color);
|
|
break;
|
|
case 'd':
|
|
colordesc(s, &bo_fg_color, &bo_bg_color);
|
|
break;
|
|
case 'u':
|
|
colordesc(s, &ul_fg_color, &ul_bg_color);
|
|
break;
|
|
case 'k':
|
|
colordesc(s, &bl_fg_color, &bl_bg_color);
|
|
break;
|
|
case 's':
|
|
colordesc(s, &so_fg_color, &so_bg_color);
|
|
break;
|
|
default:
|
|
error("-D must be followed by n, d, u, k or s", NULL_PARG);
|
|
break;
|
|
}
|
|
if (type == TOGGLE)
|
|
{
|
|
so_enter();
|
|
so_exit();
|
|
}
|
|
break;
|
|
case QUERY:
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Handler for the -" option.
|
|
*/
|
|
public void
|
|
opt_quote(type, s)
|
|
int type;
|
|
register char *s;
|
|
{
|
|
char buf[3];
|
|
PARG parg;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
case TOGGLE:
|
|
if (s[1] != '\0' && s[2] != '\0')
|
|
{
|
|
error("-\" must be followed by 1 or 2 chars", NULL_PARG);
|
|
return;
|
|
}
|
|
openquote = s[0];
|
|
if (s[1] == '\0')
|
|
closequote = openquote;
|
|
else
|
|
closequote = s[1];
|
|
break;
|
|
case QUERY:
|
|
buf[0] = openquote;
|
|
buf[1] = closequote;
|
|
buf[2] = '\0';
|
|
parg.p_string = buf;
|
|
error("quotes %s", &parg);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* "-?" means display a help message.
|
|
* If from the command line, exit immediately.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_query(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case QUERY:
|
|
case TOGGLE:
|
|
error("Use \"h\" for help", NULL_PARG);
|
|
break;
|
|
case INIT:
|
|
dohelp = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get the "screen window" size.
|
|
*/
|
|
public int
|
|
get_swindow()
|
|
{
|
|
if (swindow > 0)
|
|
return (swindow);
|
|
return (sc_height + swindow);
|
|
}
|
|
|