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freebsd/contrib/less/optfunc.c
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Xin LI fa0dc4f0f9 MFV: less v704. 
MFC after:	3 days
2026-08-14 23:21:18 -07:00

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/*
* Copyright (C) 1984-2026 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, 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"
#include "position.h"
extern int bufspace;
extern int pr_type;
extern lbool plusoption;
extern int swindow;
extern int sc_width;
extern int sc_height;
extern lbool dohelp;
extern char openquote;
extern char closequote;
extern char *prproto[];
extern char *eprproto[];
extern char *eqproto;
extern char *hproto;
extern char *wproto;
extern char *every_first_cmd;
extern IFILE curr_ifile;
extern char version[];
extern int jump_sline_arg;
extern int jump_sline;
extern long jump_sline_fraction;
extern int shift_count;
extern long shift_count_fraction;
extern int match_shift;
extern long match_shift_fraction;
extern LWCHAR rscroll_char;
extern int rscroll_attr;
extern int emouse;
extern int mouse_reverse;
extern int xmouse;
extern int wheel_lines;
extern int less_is_more;
extern int linenum_width;
extern int status_col_width;
extern int use_color;
extern int want_filesize;
extern int header_lines;
extern int header_cols;
extern int def_search_type;
extern int chopline;
extern int tabstops[];
extern int ntabstops;
extern int tabdefault;
extern int no_paste;
extern int hilite_target;
extern char intr_char;
extern int nosearch_header_lines;
extern int nosearch_header_cols;
extern POSITION header_start_pos;
extern char *init_header;
extern char *first_cmd_at_prompt;
extern char *autosave;
#if LOGFILE
extern char *namelogfile;
extern lbool force_logfile;
extern int logfile;
#endif
#if TAGS
public char *tagoption = NULL;
extern char *tags;
extern char ztags[];
#endif
#if LESSTEST
extern constant char *ttyin_name;
extern lbool is_tty;
#endif /*LESSTEST*/
#if MSDOS_COMPILER
extern int nm_fg_color, nm_bg_color, nm_attr;
extern int bo_fg_color, bo_bg_color, bo_attr;
extern int ul_fg_color, ul_bg_color, ul_attr;
extern int so_fg_color, so_bg_color, so_attr;
extern int bl_fg_color, bl_bg_color, bl_attr;
extern int sgr_mode;
#if MSDOS_COMPILER==WIN32C
#ifndef COMMON_LVB_UNDERSCORE
#define COMMON_LVB_UNDERSCORE 0x8000
#endif
#ifndef COMMON_LVB_REVERSE_VIDEO
#define COMMON_LVB_REVERSE_VIDEO 0x4000
#endif
#endif
#endif
#if LOGFILE
/*
* Handler for -o option.
*/
public void opt_o(int type, constant char *s)
{
PARG parg;
char *filename;
if (!secure_allow(SF_LOGFILE))
{
error("log file support is not available", NULL_PARG);
return;
}
switch (type)
{
case INIT:
namelogfile = save(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 = skipspc(s);
if (namelogfile != NULL)
free(namelogfile);
filename = lglob(s);
namelogfile = shell_unquote(filename);
free(filename);
use_logfile(namelogfile);
sync_logfile();
break;
case QUERY:
if (logfile < 0)
error("No log file", NULL_PARG);
else
{
parg.p_string = namelogfile;
error("Log file \"%s\"", &parg);
}
break;
}
}
/*
* Handler for -O option.
*/
public void opt__O(int type, constant char *s)
{
force_logfile = TRUE;
opt_o(type, s);
}
#endif
static void toggle_fraction(int *num, long *frac, constant char *s, constant char *printopt, lbool neg_ok, void (*calc)(void))
{
if (s == NULL)
{
} else if (*s == '.')
{
s++;
if (!getfraction(&s, frac))
{
PARG parg;
parg.p_string = printopt;
error("Invalid fraction in %s", &parg);
return;
}
} else
{
if (!getnumc(&s, printopt, neg_ok, num))
return;
*frac = -1;
}
(*calc)();
}
static void query_fraction(int value, long fraction, constant char *int_msg, constant char *frac_msg)
{
PARG parg;
if (fraction < 0)
{
parg.p_int = value;
error(int_msg, &parg);
} else
{
char buf[INT_STRLEN_BOUND(long)+2];
size_t len;
SNPRINTF1(buf, sizeof(buf), ".%06ld", fraction);
len = strlen(buf);
while (len > 2 && buf[len-1] == '0')
len--;
buf[len] = '\0';
parg.p_string = buf;
error(frac_msg, &parg);
}
}
/*
* Handlers for -j option.
*/
public void opt_j(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
toggle_fraction(&jump_sline_arg, &jump_sline_fraction,
s, "-j", TRUE, calc_jump_sline);
break;
case QUERY:
query_fraction(jump_sline_arg, jump_sline_fraction,
"Position target at screen line %d", "Position target at screen position %s");
break;
}
}
public void calc_jump_sline(void)
{
jump_sline = jump_sline_arg;
/* If jump_sline_fraction is set, calculate jump_sline from it. */
if (jump_sline_fraction >= 0)
jump_sline = (int) muldiv(sc_height, jump_sline_fraction, NUM_FRAC_DENOM);
/* Negative jump_sline means relative to bottom of screen. */
if (jump_sline < 0)
jump_sline += sc_height;
/* If jump_sline is obscured by header, move it after the header. */
if (jump_sline <= header_lines)
jump_sline = header_lines + 1;
/* If jump_sline is past bottom of screen, move it to the bottom. */
if (jump_sline >= sc_height)
jump_sline = sc_height - 1;
}
/*
* Handlers for -# option.
*/
public void opt_shift(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
toggle_fraction(&shift_count, &shift_count_fraction,
s, "-#", FALSE, calc_shift_count);
break;
case QUERY:
query_fraction(shift_count, shift_count_fraction,
"Horizontal shift %d columns", "Horizontal shift %s of screen width");
break;
}
}
public void calc_shift_count(void)
{
if (shift_count_fraction < 0)
return;
shift_count = (int) muldiv(sc_width, shift_count_fraction, NUM_FRAC_DENOM);
}
#if USERFILE
public void opt_k(int type, constant char *s)
{
PARG parg;
switch (type)
{
case INIT:
if (lesskey(s, 0))
{
parg.p_string = s;
error("Cannot use lesskey file \"%s\"", &parg);
}
break;
}
}
#if HAVE_LESSKEYSRC
public void opt_ks(int type, constant char *s)
{
PARG parg;
switch (type)
{
case INIT:
if (lesskey_src(s, 0))
{
parg.p_string = s;
error("Cannot use lesskey source file \"%s\"", &parg);
}
break;
}
}
public void opt_kc(int type, constant char *s)
{
switch (type)
{
case INIT:
if (lesskey_content(s, 0))
{
error("Error in lesskey content", NULL_PARG);
}
break;
}
}
#endif /* HAVE_LESSKEYSRC */
#endif /* USERFILE */
/*
* Handler for -S option.
*/
public void opt__S(int type, constant char *s)
{
switch (type)
{
case TOGGLE:
pos_rehead(TRUE);
break;
}
}
#if TAGS
/*
* Handler for -t option.
*/
public void opt_t(int type, constant char *s)
{
IFILE save_ifile;
POSITION pos;
switch (type)
{
case INIT:
tagoption = save(s);
/* Do the rest in main() */
break;
case TOGGLE:
if (!secure_allow(SF_TAGS))
{
error("tags support is not available", NULL_PARG);
break;
}
findtag(skipspc(s));
save_ifile = save_curr_ifile();
/*
* Try to open the file containing the tag
* and search for the tag in that file.
*/
if (edit_tagfile() || (pos = tagsearch()) == NULL_POSITION)
{
/* Failed: reopen the old file. */
reedit_ifile(save_ifile);
break;
}
unsave_ifile(save_ifile);
jump_loc(pos, jump_sline);
break;
}
}
/*
* Handler for -T option.
*/
public void opt__T(int type, constant char *s)
{
PARG parg;
char *filename;
switch (type)
{
case INIT:
tags = save(s);
break;
case TOGGLE:
s = skipspc(s);
if (tags != NULL && tags != ztags)
free(tags);
filename = lglob(s);
tags = shell_unquote(filename);
free(filename);
break;
case QUERY:
parg.p_string = tags;
error("Tags file \"%s\"", &parg);
break;
}
}
#endif
/*
* Handler for -p option.
*/
public void opt_p(int type, constant char *s)
{
switch (type)
{
case INIT:
/*
* Unget a command for the specified string.
*/
if (less_is_more)
{
/*
* In "more" mode, the -p argument is a command,
* not a search string, so we don't need a slash.
*/
every_first_cmd = save(s);
} else
{
plusoption = TRUE;
/*
* {{ This won't work if the "/" command is
* changed or invalidated by a .lesskey file. }}
*/
ungetsc("/");
ungetsc(s);
ungetcc_end_command();
}
break;
}
}
/*
* Handler for -P option.
*/
public void opt__P(int type, constant char *s)
{
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;
case 'w': proto = &wproto; s++; break;
default: proto = &prproto[PR_SHORT]; break;
}
free(*proto);
*proto = save(s);
break;
case QUERY:
parg.p_string = prproto[pr_type];
switch (pr_type)
{
case PR_MEDIUM: error("Prompt (medium): %s", &parg); break;
case PR_LONG: error("Prompt (long): %s", &parg); break;
default: error("Prompt (short): %s", &parg); break;
}
break;
}
}
/*
* Handler for --end-prompt option.
*/
public void opt_end_prompt(int type, constant char *s)
{
char **pend;
PARG parg;
switch (type)
{
case INIT:
case TOGGLE:
switch (*s)
{
case 's': pend = &eprproto[PR_SHORT]; s++; break;
case 'm': pend = &eprproto[PR_MEDIUM]; s++; break;
case 'M': pend = &eprproto[PR_LONG]; s++; break;
default: pend = &eprproto[PR_SHORT]; break;
}
if (*pend != NULL)
free(*pend);
*pend = (strcmp(s, "-") == 0) ? NULL : save(s);
break;
case QUERY:
parg.p_string = eprproto[pr_type];
if (parg.p_string == NULL)
parg.p_string = "(nothing)";
switch (pr_type)
{
case PR_MEDIUM: error("Print after medium prompt: %s", &parg); break;
case PR_LONG: error("Print after long prompt: %s", &parg); break;
default: error("Print after short prompt: %s", &parg); break;
}
break;
}
}
/*
* Handler for --autosave option.
*/
public void opt_autosave(int type, constant char *s)
{
PARG parg;
switch (type)
{
case INIT:
case TOGGLE:
if (s == NULL)
s = "-";
if (autosave != NULL)
free(autosave);
autosave = save(s);
break;
case QUERY:
parg.p_string = (autosave != NULL) ? autosave : "-";
error("Autosave actions: %s", &parg);
break;
}
}
/*
* Handler for the -b option.
*/
/*ARGSUSED*/
public void opt_b(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
/*
* Set the new number of buffers.
*/
ch_setbufspace((ssize_t) bufspace);
break;
case QUERY:
break;
}
}
/*
* Handler for the -i option.
*/
/*ARGSUSED*/
public void opt_i(int type, constant char *s)
{
switch (type)
{
case TOGGLE:
chg_caseless();
break;
case QUERY:
case INIT:
break;
}
}
/*
* Handler for the -V option.
*/
/*ARGSUSED*/
public void opt__V(int type, constant char *s)
{
switch (type)
{
case TOGGLE:
case QUERY:
dispversion();
break;
case INIT:
set_output(1, TRUE); /* Force output to stdout per GNU standard for --version output. */
putstr("less ");
putstr(version);
putstr(" (");
putstr(pattern_lib_name());
putstr(" regular expressions)\n");
{
char constant *copyright =
"Copyright (C) 1984-2026 Mark Nudelman\n\n";
putstr(copyright);
}
if (version[strlen(version)-1] == 'x')
{
putstr("** This is an EXPERIMENTAL build of the 'less' software,\n");
putstr("** and may not function correctly.\n");
putstr("** Obtain release builds from the web page below.\n\n");
}
#if LESSTEST
putstr("This build supports LESSTEST.\n");
#endif /*LESSTEST*/
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");
putstr("Home page: https://greenwoodsoftware.com/less\n");
quit(QUIT_OK);
break;
}
}
#if MSDOS_COMPILER
/*
* Parse an MSDOS color descriptor.
*/
static void colordesc(constant char *s, int *fg_color, int *bg_color, int *dattr)
{
int fg, bg;
CHAR_ATTR attr;
if (parse_color(s, &fg, &bg, &attr) == CT_NULL)
{
PARG p;
p.p_string = s;
error("Invalid color string \"%s\"", &p);
} else
{
*fg_color = fg;
*bg_color = bg;
*dattr = 0;
#if MSDOS_COMPILER==WIN32C
if (attr & CATTR_UNDERLINE)
*dattr |= COMMON_LVB_UNDERSCORE;
if (attr & CATTR_STANDOUT)
*dattr |= COMMON_LVB_REVERSE_VIDEO;
#endif
}
}
#endif
static int color_from_namechar(char namechar)
{
switch (namechar)
{
case 'B': return AT_COLOR_BIN;
case 'C': return AT_COLOR_CTRL;
case 'E': return AT_COLOR_ERROR;
case 'H': return AT_COLOR_HEADER;
case 'J': return AT_COLOR_TARGET;
case 'M': return AT_COLOR_MARK;
case 'N': return AT_COLOR_LINENUM;
case 'P': return AT_COLOR_PROMPT;
case 'R': return AT_COLOR_RSCROLL;
case 'S': return AT_COLOR_SEARCH;
case 'T': return AT_COLOR_TILDE;
case 'W': case 'A': return AT_COLOR_ATTN;
case 'n': return AT_NORMAL;
case 's': return AT_STANDOUT;
case 'd': return AT_BOLD;
case 'u': return AT_UNDERLINE;
case 'k': return AT_BLINK;
default:
if (namechar >= '1' && namechar <= '0'+NUM_SEARCH_COLORS)
return AT_COLOR_SUBSEARCH(namechar-'0');
return -1;
}
}
/*
* Handler for the -D option.
*/
/*ARGSUSED*/
public void opt_D(int type, constant char *s)
{
PARG p;
int attr;
switch (type)
{
case INIT:
case TOGGLE:
#if MSDOS_COMPILER
if (*s == 'a')
{
sgr_mode = !sgr_mode;
if (type == TOGGLE)
{
p.p_string = (sgr_mode) ? "on" : "off";
error("SGR mode is %s", &p);
}
break;
}
#endif
attr = color_from_namechar(s[0]);
if (attr < 0)
{
p.p_char = s[0];
error("Invalid color specifier '%c'", &p);
return;
}
if (!use_color && (attr & AT_COLOR))
{
error("Set --use-color before changing colors", NULL_PARG);
return;
}
s++;
#if MSDOS_COMPILER
if (!(attr & AT_COLOR))
{
switch (attr)
{
case AT_NORMAL:
colordesc(s, &nm_fg_color, &nm_bg_color, &nm_attr);
break;
case AT_BOLD:
colordesc(s, &bo_fg_color, &bo_bg_color, &bo_attr);
break;
case AT_UNDERLINE:
colordesc(s, &ul_fg_color, &ul_bg_color, &ul_attr);
break;
case AT_BLINK:
colordesc(s, &bl_fg_color, &bl_bg_color, &bl_attr);
break;
case AT_STANDOUT:
colordesc(s, &so_fg_color, &so_bg_color, &so_attr);
break;
}
if (type == TOGGLE)
{
init_win_colors();
at_enter(AT_STANDOUT);
at_exit();
}
} else
#endif
if (set_color_map(attr, s) < 0)
{
p.p_string = s;
error("Invalid color string \"%s\"", &p);
return;
}
break;
}
}
/*
*/
public void set_tabs(constant char *s, size_t len)
{
int i;
constant char *es = s + len;
/* Start at 1 because tabstops[0] is always zero. */
for (i = 1; i < TABSTOP_MAX; )
{
int n = 0;
lbool v = FALSE;
while (s < es && *s == ' ')
s++;
for (; s < es && *s >= '0' && *s <= '9'; s++)
{
v = v || ckd_mul(&n, n, 10);
v = v || ckd_add(&n, n, *s - '0');
}
if (!v && n > tabstops[i-1])
tabstops[i++] = n;
while (s < es && *s == ' ')
s++;
if (s == es || *s++ != ',')
break;
}
if (i < 2)
return;
ntabstops = i;
tabdefault = tabstops[ntabstops-1] - tabstops[ntabstops-2];
}
/*
* Handler for the -x option.
*/
public void opt_x(int type, constant char *s)
{
char msg[60+((INT_STRLEN_BOUND(int)+1)*TABSTOP_MAX)];
int i;
PARG p;
switch (type)
{
case INIT:
case TOGGLE:
set_tabs(s, strlen(s));
break;
case QUERY:
strcpy(msg, "Tab stops ");
if (ntabstops > 2)
{
for (i = 1; i < ntabstops; i++)
{
if (i > 1)
strcat(msg, ",");
sprintf(msg+strlen(msg), "%d", tabstops[i]);
}
sprintf(msg+strlen(msg), " and then ");
}
sprintf(msg+strlen(msg), "every %d spaces",
tabdefault);
p.p_string = msg;
error("%s", &p);
break;
}
}
/*
* Handler for the -" option.
*/
public void opt_quote(int type, constant char *s)
{
char buf[3];
PARG parg;
switch (type)
{
case INIT:
case TOGGLE:
if (s[0] == '\0')
{
openquote = closequote = '\0';
break;
}
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;
}
}
/*
* Handler for the --rscroll option.
*/
/*ARGSUSED*/
public void opt_rscroll(int type, constant char *s)
{
PARG p;
switch (type)
{
case INIT:
case TOGGLE: {
constant char *fmt;
int attr = AT_STANDOUT;
setfmt(s, &fmt, &attr, "*s>", FALSE);
if (strcmp(fmt, "-") == 0)
{
rscroll_char = 0;
} else
{
rscroll_attr = attr|AT_COLOR_RSCROLL;
if (*fmt == '\0')
rscroll_char = '>';
else
{
LWCHAR ch = step_charc(&fmt, +1, fmt+strlen(fmt));
if (pwidth(ch, rscroll_attr, 0, 0) > 1)
error("cannot set rscroll to a wide character", NULL_PARG);
else
rscroll_char = ch;
}
}
break; }
case QUERY: {
p.p_string = rscroll_char ? prchar((LWCHAR) rscroll_char) : "-";
error("rscroll character is %s", &p);
break; }
}
}
/*
* "-?" means display a help message.
* If from the command line, exit immediately.
*/
/*ARGSUSED*/
public void opt_query(int type, constant char *s)
{
switch (type)
{
case QUERY:
case TOGGLE:
error("Use \"h\" for help", NULL_PARG);
break;
case INIT:
dohelp = TRUE;
}
}
/*ARGSUSED*/
public void opt_match_shift(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
toggle_fraction(&match_shift, &match_shift_fraction,
s, "--match-shift", FALSE, calc_match_shift);
break;
case QUERY:
query_fraction(match_shift, match_shift_fraction,
"Search match shift is %d", "Search match shift is %s of screen width");
break;
}
}
public void calc_match_shift(void)
{
if (match_shift_fraction < 0)
return;
match_shift = (int) muldiv(sc_width, match_shift_fraction, NUM_FRAC_DENOM);
}
/*
* Handler for the --emouse option.
*/
/*ARGSUSED*/
public void opt_emouse(int type, constant char *s)
{
/* Order of entries matters for QUERY.
* Combinations must come after their components. */
static struct csl_bitmap_def emouse_defs[] = {
{ "hscroll", EMOUSE_HSCROLL },
{ "vscroll", EMOUSE_VSCROLL },
{ "hdrag", EMOUSE_HDRAG },
{ "vdrag", EMOUSE_VDRAG },
{ "lclick", EMOUSE_LCLICK },
{ "rclick", EMOUSE_RCLICK },
{ "scroll", EMOUSE_HSCROLL|EMOUSE_VSCROLL },
{ "drag", EMOUSE_HDRAG|EMOUSE_VDRAG },
{ "hmove", EMOUSE_HSCROLL|EMOUSE_HDRAG },
{ "vmove", EMOUSE_VSCROLL|EMOUSE_VDRAG },
{ "move", EMOUSE_VSCROLL|EMOUSE_VDRAG|EMOUSE_HSCROLL|EMOUSE_HDRAG },
{ "click", EMOUSE_LCLICK|EMOUSE_RCLICK },
{ "all", EMOUSE_VSCROLL|EMOUSE_VDRAG|EMOUSE_HSCROLL|EMOUSE_HDRAG|EMOUSE_LCLICK|EMOUSE_RCLICK },
};
switch (type)
{
case INIT:
case TOGGLE: {
lbool was_mouse_enabled = (emouse != 0);
if (s == NULL || strcmp(s, "-") == 0)
emouse = 0;
else
emouse = parse_csl_bitmap(s,
emouse_defs, countof(emouse_defs), "--emouse");
if (type == TOGGLE && was_mouse_enabled != (emouse != 0))
{
if (emouse == 0)
deinit_mouse();
else
init_mouse();
}
break; }
case QUERY: {
char buf[128];
char *bp = buf;
char *ebuf = buf + sizeof(buf);
int qmouse = emouse;
PARG parg;
int i;
for (i = countof(emouse_defs)-1; i >= 0; i--)
{
int bit = emouse_defs[i].bit_value;
if ((qmouse & bit) == bit)
{
if (bp > buf && bp+1 < ebuf)
*bp++ = ',';
strncpy(bp, emouse_defs[i].bit_name, ptr_diff(ebuf, bp));
bp += strlen(bp);
qmouse &= ~bit;
}
}
*bp = '\0';
parg.p_string = buf;
if (buf[0] == '\0')
error("Ignore mouse input", NULL_PARG);
else
error("Mouse features enabled: %s", &parg);
break; }
}
}
/*
* Handler for the --mouse option.
*/
/*ARGSUSED*/
public void opt_mouse(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
switch (xmouse)
{
case OPT_OFF:
opt_emouse(type, "-");
break;
case OPT_ON:
case OPT_ONPLUS:
opt_emouse(type, "vmove,click");
mouse_reverse = (xmouse == OPT_ONPLUS);
break;
}
break;
case QUERY:
break;
}
}
/*
* Handler for the --wheel-lines option.
*/
/*ARGSUSED*/
public void opt_wheel_lines(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
if (wheel_lines <= 0)
wheel_lines = default_wheel_lines();
break;
case QUERY:
break;
}
}
/*
* Handler for the --line-number-width option.
*/
/*ARGSUSED*/
public void opt_linenum_width(int type, constant char *s)
{
PARG parg;
switch (type)
{
case INIT:
case TOGGLE:
if (linenum_width > MAX_LINENUM_WIDTH)
{
parg.p_int = MAX_LINENUM_WIDTH;
error("Line number width must not be larger than %d", &parg);
linenum_width = MIN_LINENUM_WIDTH;
}
break;
case QUERY:
break;
}
}
/*
* Handler for the --status-column-width option.
*/
/*ARGSUSED*/
public void opt_status_col_width(int type, constant char *s)
{
PARG parg;
switch (type)
{
case INIT:
case TOGGLE:
if (status_col_width > MAX_STATUSCOL_WIDTH)
{
parg.p_int = MAX_STATUSCOL_WIDTH;
error("Status column width must not be larger than %d", &parg);
status_col_width = 2;
}
break;
case QUERY:
break;
}
}
/*
* Handler for the --file-size option.
*/
/*ARGSUSED*/
public void opt_filesize(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
if (want_filesize && curr_ifile != NULL && ch_length() == NULL_POSITION)
scan_eof();
break;
case QUERY:
break;
}
}
/*
* Handler for the --cmd option.
*/
/*ARGSUSED*/
public void opt_first_cmd_at_prompt(int type, constant char *s)
{
switch (type)
{
case INIT:
case TOGGLE:
first_cmd_at_prompt = save(s);
break;
case QUERY:
break;
}
}
/*
* Handler for the --intr option.
*/
/*ARGSUSED*/
public void opt_intr(int type, constant char *s)
{
PARG p;
switch (type)
{
case INIT:
case TOGGLE:
intr_char = *s;
if (intr_char == '^' && s[1] != '\0')
intr_char = CONTROL(s[1]);
break;
case QUERY: {
p.p_string = prchar((LWCHAR) intr_char);
error("interrupt character is %s", &p);
break; }
}
}
/*
* Return the next number from a comma-separated list.
* Return -1 if the list entry is missing or empty.
* Updates *sp to point to the first char of the next number in the list.
*/
static lbool next_cnum(constant char **sp, constant char *printopt, mutable int *p_num)
{
if (**sp == '\0') /* at end of line */
{
*p_num = -1;
return TRUE;
}
if (**sp == ',') /* that's the next comma; we have an empty string */
{
++(*sp);
*p_num = -1;
return TRUE;
}
if (!getnumc(sp, printopt, FALSE, p_num))
return FALSE;
if (**sp == ',')
++(*sp);
return TRUE;
}
/*
* Parse a parameter to the --header option.
* Value is "L,C,N", where each field is a decimal number or empty.
*/
static lbool parse_header(constant char *s, int *lines, int *cols, POSITION *start_pos)
{
int n;
if (*s == '-')
s = "0,0";
if (!next_cnum(&s, "--header", &n))
return FALSE;
if (n >= 0) *lines = n;
if (!next_cnum(&s, "--header", &n))
return FALSE;
if (n >= 0) *cols = n;
if (!next_cnum(&s, "--header", &n))
return FALSE;
if (n > 0)
{
if (n < 1) n = 1;
*start_pos = find_pos((LINENUM)n);
}
return TRUE;
}
/*
* Handler for the --header option.
*/
/*ARGSUSED*/
public void opt_header(int type, constant char *s)
{
switch (type)
{
case INIT:
/* Can't call parse_header now because input file is not yet opened,
* so find_pos won't work. */
init_header = save(s);
break;
case TOGGLE: {
int lines = header_lines;
int cols = header_cols;
POSITION start_pos = (type == INIT) ? ch_zero() : position(TOP);
if (start_pos == NULL_POSITION) start_pos = ch_zero();
if (!parse_header(s, &lines, &cols, &start_pos))
break;
header_lines = lines;
header_cols = cols;
set_header(start_pos);
calc_jump_sline();
break; }
case QUERY: {
char buf[3*INT_STRLEN_BOUND(long)+3];
PARG parg;
SNPRINTF3(buf, sizeof(buf), "%ld,%ld,%ld", (long) header_lines, (long) header_cols, (long) find_linenum(header_start_pos));
parg.p_string = buf;
error("Header (lines,columns,line-number) is %s", &parg);
break; }
}
}
/*
* Handler for the --hilite-target option.
*/
/*ARGSUSED*/
public void opt_hilite_target(int type, constant char *s)
{
switch (type)
{
case INIT:
break;
case TOGGLE:
draw_target_attn(hilite_target != OPT_OFF);
break;
case QUERY:
break;
}
}
/*
* Handler for the --search-options option.
*/
/*ARGSUSED*/
public void opt_search_type(int type, constant char *s)
{
int st;
PARG parg;
char buf[16];
char *bp;
int i;
switch (type)
{
case INIT:
case TOGGLE:
st = 0;
for (; *s != '\0'; s++)
{
switch (*s)
{
case 'E': case 'e': case CONTROL('E'): st |= SRCH_PAST_EOF; break;
case 'F': case 'f': case CONTROL('F'): st |= SRCH_FIRST_FILE; break;
case 'K': case 'k': case CONTROL('K'): st |= SRCH_NO_MOVE; break;
case 'N': case 'n': case CONTROL('N'): st |= SRCH_NO_MATCH; break;
case 'R': case 'r': case CONTROL('R'): st |= SRCH_NO_REGEX; break;
case 'W': case 'w': case CONTROL('W'): st |= SRCH_WRAP; break;
case '-': st = 0; break;
case '^': break;
default:
if (*s >= '1' && *s <= '0'+NUM_SEARCH_COLORS)
{
st |= SRCH_SUBSEARCH(*s-'0');
break;
}
parg.p_char = *s;
error("invalid search option '%c'", &parg);
return;
}
}
def_search_type = norm_search_type(st);
break;
case QUERY:
bp = buf;
if (def_search_type & SRCH_PAST_EOF) *bp++ = 'E';
if (def_search_type & SRCH_FIRST_FILE) *bp++ = 'F';
if (def_search_type & SRCH_NO_MOVE) *bp++ = 'K';
if (def_search_type & SRCH_NO_MATCH) *bp++ = 'N';
if (def_search_type & SRCH_NO_REGEX) *bp++ = 'R';
if (def_search_type & SRCH_WRAP) *bp++ = 'W';
for (i = 1; i <= NUM_SEARCH_COLORS; i++)
if (def_search_type & SRCH_SUBSEARCH(i))
*bp++ = (char) ('0'+i);
if (bp == buf)
*bp++ = '-';
*bp = '\0';
parg.p_string = buf;
error("search options: %s", &parg);
break;
}
}
/*
* Handler for the --no-search-headers, --no-search-header-lines
* and --no-search-header-cols options.
*/
static void do_nosearch_headers(int type, int no_header_lines, int no_header_cols)
{
switch (type)
{
case INIT:
case TOGGLE:
nosearch_header_lines = no_header_lines;
nosearch_header_cols = no_header_cols;
if (type != TOGGLE) break;
/*FALLTHRU*/
case QUERY:
if (nosearch_header_lines && nosearch_header_cols)
error("Search does not include header lines or columns", NULL_PARG);
else if (nosearch_header_lines)
error("Search includes header columns but not header lines", NULL_PARG);
else if (nosearch_header_cols)
error("Search includes header lines but not header columns", NULL_PARG);
else
error("Search includes header lines and columns", NULL_PARG);
}
}
/*ARGSUSED*/
public void opt_nosearch_headers(int type, constant char *s)
{
do_nosearch_headers(type, 1, 1);
}
/*ARGSUSED*/
public void opt_nosearch_header_lines(int type, constant char *s)
{
do_nosearch_headers(type, 1, 0);
}
/*ARGSUSED*/
public void opt_nosearch_header_cols(int type, constant char *s)
{
do_nosearch_headers(type, 0, 1);
}
/*ARGSUSED*/
public void opt_no_paste(int type, constant char *s)
{
switch (type)
{
case TOGGLE:
if (no_paste)
init_bracketed_paste();
else
deinit_bracketed_paste();
break;
case INIT:
case QUERY:
break;
}
}
#if LESSTEST
/*
* Handler for the --tty option.
*/
/*ARGSUSED*/
public void opt_ttyin_name(int type, constant char *s)
{
switch (type)
{
case INIT:
ttyin_name = s;
is_tty = TRUE;
break;
}
}
#endif /*LESSTEST*/
public int chop_line(void)
{
return (chopline || header_cols > 0 || header_lines > 0);
}
/*
* Get the "screen window" size.
*/
public int get_swindow(void)
{
if (swindow > 0)
return (swindow);
return (sc_height - header_lines + swindow);
}
/*
* Should an action initiate an autosave?
*/
public lbool autosave_action(char act)
{
return strchr(autosave, act) != NULL || strchr(autosave, '*') != NULL;
}
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