1040 lines
17 KiB
C
1040 lines
17 KiB
C
/*
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* Copyright (C) 1984-2021 Mark Nudelman
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Less License, as specified in the README file.
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*
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* For more information, see the README file.
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*/
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/*
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* Handling functions for command line options.
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*
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* Most options are handled by the generic code in option.c.
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* But all string options, and a few non-string options, require
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* special handling specific to the particular option.
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* This special processing is done by the "handling functions" in this file.
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*
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* Each handling function is passed a "type" and, if it is a string
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* option, the string which should be "assigned" to the option.
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* The type may be one of:
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* INIT The option is being initialized from the command line.
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* TOGGLE The option is being changed from within the program.
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* QUERY The setting of the option is merely being queried.
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*/
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#include "less.h"
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#include "option.h"
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extern int nbufs;
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extern int bufspace;
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extern int pr_type;
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extern int plusoption;
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extern int swindow;
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extern int sc_width;
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extern int sc_height;
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extern int secure;
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extern int dohelp;
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extern int is_tty;
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extern char openquote;
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extern char closequote;
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extern char *prproto[];
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extern char *eqproto;
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extern char *hproto;
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extern char *wproto;
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extern char *every_first_cmd;
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extern IFILE curr_ifile;
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extern char version[];
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extern int jump_sline;
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extern long jump_sline_fraction;
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extern int shift_count;
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extern long shift_count_fraction;
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extern char rscroll_char;
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extern int rscroll_attr;
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extern int mousecap;
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extern int wheel_lines;
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extern int less_is_more;
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extern int linenum_width;
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extern int status_col_width;
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extern int use_color;
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extern int want_filesize;
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#if LOGFILE
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extern char *namelogfile;
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extern int force_logfile;
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extern int logfile;
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#endif
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#if TAGS
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public char *tagoption = NULL;
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extern char *tags;
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extern char ztags[];
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#endif
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#if LESSTEST
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extern char *ttyin_name;
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extern int rstat_file;
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#endif /*LESSTEST*/
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#if MSDOS_COMPILER
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extern int nm_fg_color, nm_bg_color;
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extern int bo_fg_color, bo_bg_color;
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extern int ul_fg_color, ul_bg_color;
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extern int so_fg_color, so_bg_color;
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extern int bl_fg_color, bl_bg_color;
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extern int sgr_mode;
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#if MSDOS_COMPILER==WIN32C
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#ifndef COMMON_LVB_UNDERSCORE
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#define COMMON_LVB_UNDERSCORE 0x8000
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#endif
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#endif
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#endif
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#if LOGFILE
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/*
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* Handler for -o option.
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*/
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public void
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opt_o(type, s)
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int type;
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char *s;
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{
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PARG parg;
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char *filename;
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if (secure)
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{
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error("log file support is not available", NULL_PARG);
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return;
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}
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switch (type)
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{
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case INIT:
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namelogfile = save(s);
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break;
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case TOGGLE:
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if (ch_getflags() & CH_CANSEEK)
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{
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error("Input is not a pipe", NULL_PARG);
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return;
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}
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if (logfile >= 0)
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{
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error("Log file is already in use", NULL_PARG);
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return;
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}
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s = skipsp(s);
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if (namelogfile != NULL)
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free(namelogfile);
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filename = lglob(s);
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namelogfile = shell_unquote(filename);
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free(filename);
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use_logfile(namelogfile);
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sync_logfile();
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break;
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case QUERY:
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if (logfile < 0)
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error("No log file", NULL_PARG);
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else
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{
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parg.p_string = namelogfile;
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error("Log file \"%s\"", &parg);
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}
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break;
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}
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}
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/*
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* Handler for -O option.
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*/
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public void
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opt__O(type, s)
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int type;
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char *s;
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{
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force_logfile = TRUE;
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opt_o(type, s);
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}
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#endif
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/*
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* Handlers for -j option.
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*/
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public void
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opt_j(type, s)
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int type;
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char *s;
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{
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PARG parg;
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char buf[24];
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int len;
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int err;
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switch (type)
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{
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case INIT:
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case TOGGLE:
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if (*s == '.')
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{
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s++;
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jump_sline_fraction = getfraction(&s, "j", &err);
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if (err)
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error("Invalid line fraction", NULL_PARG);
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else
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calc_jump_sline();
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} else
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{
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int sline = getnum(&s, "j", &err);
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if (err)
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error("Invalid line number", NULL_PARG);
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else
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{
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jump_sline = sline;
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jump_sline_fraction = -1;
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}
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}
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break;
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case QUERY:
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if (jump_sline_fraction < 0)
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{
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parg.p_int = jump_sline;
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error("Position target at screen line %d", &parg);
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} else
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{
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SNPRINTF1(buf, sizeof(buf), ".%06ld", jump_sline_fraction);
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len = (int) strlen(buf);
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while (len > 2 && buf[len-1] == '0')
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len--;
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buf[len] = '\0';
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parg.p_string = buf;
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error("Position target at screen position %s", &parg);
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}
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break;
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}
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}
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public void
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calc_jump_sline(VOID_PARAM)
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{
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if (jump_sline_fraction < 0)
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return;
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jump_sline = sc_height * jump_sline_fraction / NUM_FRAC_DENOM;
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}
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/*
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* Handlers for -# option.
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*/
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public void
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opt_shift(type, s)
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int type;
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char *s;
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{
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PARG parg;
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char buf[24];
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int len;
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int err;
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switch (type)
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{
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case INIT:
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case TOGGLE:
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if (*s == '.')
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{
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s++;
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shift_count_fraction = getfraction(&s, "#", &err);
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if (err)
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error("Invalid column fraction", NULL_PARG);
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else
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calc_shift_count();
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} else
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{
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int hs = getnum(&s, "#", &err);
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if (err)
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error("Invalid column number", NULL_PARG);
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else
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{
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shift_count = hs;
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shift_count_fraction = -1;
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}
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}
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break;
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case QUERY:
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if (shift_count_fraction < 0)
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{
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parg.p_int = shift_count;
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error("Horizontal shift %d columns", &parg);
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} else
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{
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SNPRINTF1(buf, sizeof(buf), ".%06ld", shift_count_fraction);
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len = (int) strlen(buf);
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while (len > 2 && buf[len-1] == '0')
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len--;
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buf[len] = '\0';
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parg.p_string = buf;
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error("Horizontal shift %s of screen width", &parg);
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}
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break;
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}
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}
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public void
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calc_shift_count(VOID_PARAM)
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{
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if (shift_count_fraction < 0)
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return;
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shift_count = sc_width * shift_count_fraction / NUM_FRAC_DENOM;
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}
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#if USERFILE
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public void
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opt_k(type, s)
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int type;
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char *s;
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{
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PARG parg;
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switch (type)
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{
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case INIT:
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if (lesskey(s, 0))
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{
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parg.p_string = s;
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error("Cannot use lesskey file \"%s\"", &parg);
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}
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break;
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}
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}
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#if HAVE_LESSKEYSRC
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public void
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opt_ks(type, s)
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int type;
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char *s;
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{
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PARG parg;
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switch (type)
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{
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case INIT:
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if (lesskey_src(s, 0))
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{
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parg.p_string = s;
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error("Cannot use lesskey source file \"%s\"", &parg);
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}
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break;
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}
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}
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#endif /* HAVE_LESSKEYSRC */
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#endif /* USERFILE */
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#if TAGS
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/*
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* Handler for -t option.
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*/
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public void
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opt_t(type, s)
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int type;
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char *s;
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{
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IFILE save_ifile;
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POSITION pos;
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switch (type)
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{
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case INIT:
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tagoption = save(s);
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/* Do the rest in main() */
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break;
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case TOGGLE:
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if (secure)
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{
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error("tags support is not available", NULL_PARG);
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break;
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}
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findtag(skipsp(s));
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save_ifile = save_curr_ifile();
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/*
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* Try to open the file containing the tag
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* and search for the tag in that file.
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*/
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if (edit_tagfile() || (pos = tagsearch()) == NULL_POSITION)
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{
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/* Failed: reopen the old file. */
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reedit_ifile(save_ifile);
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break;
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}
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unsave_ifile(save_ifile);
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jump_loc(pos, jump_sline);
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break;
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}
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}
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/*
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* Handler for -T option.
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*/
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public void
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opt__T(type, s)
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int type;
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char *s;
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{
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PARG parg;
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char *filename;
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switch (type)
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{
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case INIT:
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tags = save(s);
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break;
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case TOGGLE:
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s = skipsp(s);
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if (tags != NULL && tags != ztags)
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free(tags);
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filename = lglob(s);
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tags = shell_unquote(filename);
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free(filename);
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break;
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case QUERY:
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parg.p_string = tags;
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error("Tags file \"%s\"", &parg);
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break;
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}
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}
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#endif
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/*
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* Handler for -p option.
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*/
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public void
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opt_p(type, s)
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int type;
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char *s;
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{
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switch (type)
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{
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case INIT:
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/*
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* Unget a command for the specified string.
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*/
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if (less_is_more)
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{
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/*
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* In "more" mode, the -p argument is a command,
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* not a search string, so we don't need a slash.
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*/
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every_first_cmd = save(s);
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} else
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{
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plusoption = TRUE;
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/*
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* {{ This won't work if the "/" command is
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* changed or invalidated by a .lesskey file. }}
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*/
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ungetsc("/");
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ungetsc(s);
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ungetcc_back(CHAR_END_COMMAND);
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}
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break;
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}
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}
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/*
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* Handler for -P option.
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*/
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public void
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opt__P(type, s)
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int type;
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char *s;
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{
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char **proto;
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PARG parg;
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switch (type)
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{
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case INIT:
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case TOGGLE:
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/*
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* Figure out which prototype string should be changed.
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*/
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switch (*s)
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{
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case 's': proto = &prproto[PR_SHORT]; s++; break;
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case 'm': proto = &prproto[PR_MEDIUM]; s++; break;
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case 'M': proto = &prproto[PR_LONG]; s++; break;
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case '=': proto = &eqproto; s++; break;
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case 'h': proto = &hproto; s++; break;
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case 'w': proto = &wproto; s++; break;
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default: proto = &prproto[PR_SHORT]; break;
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}
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free(*proto);
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*proto = save(s);
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break;
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case QUERY:
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parg.p_string = prproto[pr_type];
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error("%s", &parg);
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break;
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}
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}
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/*
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* Handler for the -b option.
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*/
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/*ARGSUSED*/
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public void
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opt_b(type, s)
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int type;
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char *s;
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{
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switch (type)
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{
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case INIT:
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case TOGGLE:
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/*
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* Set the new number of buffers.
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*/
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ch_setbufspace(bufspace);
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break;
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case QUERY:
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break;
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}
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}
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/*
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* Handler for the -i option.
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*/
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/*ARGSUSED*/
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public void
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opt_i(type, s)
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int type;
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char *s;
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{
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switch (type)
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{
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case TOGGLE:
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chg_caseless();
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break;
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case QUERY:
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case INIT:
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break;
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|
}
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}
|
|
|
|
/*
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* Handler for the -V option.
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*/
|
|
/*ARGSUSED*/
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public void
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opt__V(type, s)
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int type;
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char *s;
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{
|
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switch (type)
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|
{
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case TOGGLE:
|
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case QUERY:
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|
dispversion();
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break;
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|
case INIT:
|
|
set_output(1); /* Force output to stdout per GNU standard for --version output. */
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putstr("less ");
|
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putstr(version);
|
|
putstr(" (");
|
|
putstr(pattern_lib_name());
|
|
putstr(" regular expressions)\n");
|
|
{
|
|
char constant *copyright =
|
|
"Copyright (C) 1984-2021 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");
|
|
}
|
|
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(s, fg_color, bg_color)
|
|
char *s;
|
|
int *fg_color;
|
|
int *bg_color;
|
|
{
|
|
int fg, bg;
|
|
#if MSDOS_COMPILER==WIN32C
|
|
int ul = 0;
|
|
|
|
if (*s == 'u')
|
|
{
|
|
ul = COMMON_LVB_UNDERSCORE;
|
|
s++;
|
|
if (*s == '\0')
|
|
{
|
|
*fg_color = nm_fg_color | ul;
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|
*bg_color = nm_bg_color;
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return;
|
|
}
|
|
}
|
|
#endif
|
|
if (parse_color(s, &fg, &bg) == CT_NULL)
|
|
{
|
|
PARG p;
|
|
p.p_string = s;
|
|
error("Invalid color string \"%s\"", &p);
|
|
} else
|
|
{
|
|
if (fg == CV_NOCHANGE)
|
|
fg = nm_fg_color;
|
|
if (bg == CV_NOCHANGE)
|
|
bg = nm_bg_color;
|
|
#if MSDOS_COMPILER==WIN32C
|
|
fg |= ul;
|
|
#endif
|
|
*fg_color = fg;
|
|
*bg_color = bg;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
color_from_namechar(namechar)
|
|
char namechar;
|
|
{
|
|
switch (namechar)
|
|
{
|
|
case 'W': case 'A': return AT_COLOR_ATTN;
|
|
case 'B': return AT_COLOR_BIN;
|
|
case 'C': return AT_COLOR_CTRL;
|
|
case 'E': return AT_COLOR_ERROR;
|
|
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 '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: return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the -D option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_D(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
PARG p;
|
|
int attr;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
case TOGGLE:
|
|
#if MSDOS_COMPILER
|
|
if (*s == 'a')
|
|
{
|
|
sgr_mode = !sgr_mode;
|
|
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);
|
|
break;
|
|
case AT_BOLD:
|
|
colordesc(s, &bo_fg_color, &bo_bg_color);
|
|
break;
|
|
case AT_UNDERLINE:
|
|
colordesc(s, &ul_fg_color, &ul_bg_color);
|
|
break;
|
|
case AT_BLINK:
|
|
colordesc(s, &bl_fg_color, &bl_bg_color);
|
|
break;
|
|
case AT_STANDOUT:
|
|
colordesc(s, &so_fg_color, &so_bg_color);
|
|
break;
|
|
}
|
|
if (type == TOGGLE)
|
|
{
|
|
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;
|
|
#if MSDOS_COMPILER
|
|
case QUERY:
|
|
p.p_string = (sgr_mode) ? "on" : "off";
|
|
error("SGR mode is %s", &p);
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the -x option.
|
|
*/
|
|
public void
|
|
opt_x(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
extern int tabstops[];
|
|
extern int ntabstops;
|
|
extern int tabdefault;
|
|
char msg[60+(4*TABSTOP_MAX)];
|
|
int i;
|
|
PARG p;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
case TOGGLE:
|
|
/* Start at 1 because tabstops[0] is always zero. */
|
|
for (i = 1; i < TABSTOP_MAX; )
|
|
{
|
|
int n = 0;
|
|
s = skipsp(s);
|
|
while (*s >= '0' && *s <= '9')
|
|
n = (10 * n) + (*s++ - '0');
|
|
if (n > tabstops[i-1])
|
|
tabstops[i++] = n;
|
|
s = skipsp(s);
|
|
if (*s++ != ',')
|
|
break;
|
|
}
|
|
if (i < 2)
|
|
return;
|
|
ntabstops = i;
|
|
tabdefault = tabstops[ntabstops-1] - tabstops[ntabstops-2];
|
|
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(type, s)
|
|
int type;
|
|
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(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
PARG p;
|
|
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
case TOGGLE: {
|
|
char *fmt;
|
|
int attr = AT_STANDOUT;
|
|
setfmt(s, &fmt, &attr, "*s>");
|
|
if (strcmp(fmt, "-") == 0)
|
|
{
|
|
rscroll_char = 0;
|
|
} else
|
|
{
|
|
rscroll_char = *fmt ? *fmt : '>';
|
|
rscroll_attr = attr|AT_COLOR_RSCROLL;
|
|
}
|
|
break; }
|
|
case QUERY: {
|
|
p.p_string = rscroll_char ? prchar(rscroll_char) : "-";
|
|
error("rscroll char is %s", &p);
|
|
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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the --mouse option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_mousecap(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case TOGGLE:
|
|
if (mousecap == OPT_OFF)
|
|
deinit_mouse();
|
|
else
|
|
init_mouse();
|
|
break;
|
|
case INIT:
|
|
case QUERY:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the --wheel-lines option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_wheel_lines(type, s)
|
|
int type;
|
|
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(type, s)
|
|
int type;
|
|
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(type, s)
|
|
int type;
|
|
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(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
case TOGGLE:
|
|
if (want_filesize && curr_ifile != NULL && ch_length() == NULL_POSITION)
|
|
scan_eof();
|
|
break;
|
|
case QUERY:
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if LESSTEST
|
|
/*
|
|
* Handler for the --tty option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_ttyin_name(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
ttyin_name = s;
|
|
is_tty = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handler for the --rstat option.
|
|
*/
|
|
/*ARGSUSED*/
|
|
public void
|
|
opt_rstat(type, s)
|
|
int type;
|
|
char *s;
|
|
{
|
|
switch (type)
|
|
{
|
|
case INIT:
|
|
rstat_file = open(s, O_WRONLY|O_CREAT, 0664);
|
|
if (rstat_file < 0)
|
|
{
|
|
PARG parg;
|
|
parg.p_string = s;
|
|
error("Cannot create rstat file \"%s\"", &parg);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
#endif /*LESSTEST*/
|
|
|
|
/*
|
|
* Get the "screen window" size.
|
|
*/
|
|
public int
|
|
get_swindow(VOID_PARAM)
|
|
{
|
|
if (swindow > 0)
|
|
return (swindow);
|
|
return (sc_height + swindow);
|
|
}
|
|
|