Adding upstream version 1:2.1.2.upstream/1%2.1.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 1380 insertions, 0 deletions

diff --git a/libsupp/clif.c b/libsupp/clif.c
new file mode 100644
index 0000000..4ef20e4
--- /dev/null
+++ b/libsupp/clif.c
@@ -0,0 +1,1259 @@
+/*
+    Copyright (c)  2000, 2003		Dmitry Butskoy
+					<buc@citadel.stu.neva.ru>
+    License:  LGPL v2.1 or any later
+
+    See COPYING.LIB for the status of this software.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "clif.h"
+
+
+#if 1	/*  Bad idea, anyway...  */
+#define MAX_ARGC_NUMBER	256
+typedef unsigned char _CLIF_index;
+#else
+#define MAX_ARGC_NUMBER	(4096 / 5 + 1)	/*  POSIX ARG_MAX >= 4096 ...  */
+typedef unsigned short _CLIF_index;
+#endif
+
+
+/*  This is needed for some print info functions.
+   This is ugly for thread-safe (is it really actual on program invoking?),
+   and for several CLIF_parse_cmdline invoking... But foo on this. Yeah...
+*/
+static struct {
+	int argc;
+	char **argv;
+	CLIF_option *option_list;
+	CLIF_argument *argument_list;
+	unsigned int parse_flags;
+} curr = { 0, };
+	
+
+static void err_report (const char *format, ...) {
+	va_list ap;
+
+	if (curr.parse_flags & CLIF_SILENT)
+		return;
+
+	va_start (ap, format);
+
+	vfprintf (stderr, format, ap);
+
+	va_end (ap);
+
+	fprintf (stderr, "\n");
+
+	return;
+}
+
+
+/*  info generation stuff...   */
+
+#define SHORT_PLUS_MINUS	"+/-"
+#define LONG_PLUS_MINUS		"++/--"
+#define EXCL_DLM		" | "
+
+static char *show_short (const CLIF_option *optn) {
+	static char buf[80];
+	char *p = buf;
+	unsigned int flags = optn->flags | curr.parse_flags;
+
+	if (optn->function_plus) {
+	    if (!optn->function)  *p++ = '+';
+	    else {
+		strcpy (p, SHORT_PLUS_MINUS);
+		p += sizeof (SHORT_PLUS_MINUS) - 1;
+	    }
+	} else
+	    *p++ = '-';
+
+	*p++ = optn->short_opt[0];
+
+	if (optn->arg_name) {
+	    char *endp = buf + sizeof (buf) - sizeof (",...]");
+	    const char *s;
+
+	    if (!(flags & _CLIF_STRICT_JOIN_ARG))  *p++ = ' ';
+	    if (flags & CLIF_OPTARG)  *p++ = '[';
+
+	    s = optn->arg_name;
+	    while (*s && p < endp)  *p++ = *s++;
+
+	    if (flags & CLIF_SEVERAL) {
+		strcpy (p, ",...");
+		p += sizeof (",...") - 1;	/*  last '\0' ...  */
+	    }
+
+	    if (flags & CLIF_OPTARG)  *p++ = ']';
+	}
+
+	*p = '\0';
+
+	return buf;
+}
+	
+static char *show_long (const CLIF_option *optn) {
+	static char buf[80];
+	char *p = buf;
+	char *endp;
+	const char *s;
+	unsigned int flags = optn->flags | curr.parse_flags;
+
+
+	if (!(flags & _CLIF_STRICT_KEYWORD)) {
+
+	    if (!(flags & _CLIF_STRICT_ONEDASH)) {
+		if (optn->function_plus) {
+		    if (!optn->function)  {  *p++ = '+'; *p++ = '+';  }
+		    else {
+			strcpy (p, LONG_PLUS_MINUS);
+			p += sizeof (LONG_PLUS_MINUS) - 1;
+		    }
+		} else {  *p++ = '-'; *p++ = '-';  }
+
+	    } else {
+		if (optn->function_plus) {
+		    if (!optn->function)  *p++ = '+';
+		    else {
+			strcpy (p, SHORT_PLUS_MINUS);
+			p += sizeof (SHORT_PLUS_MINUS) - 1;
+		    }
+		} else  *p++ = '-';
+	    }
+	}
+
+	s = optn->long_opt;
+	endp = buf + sizeof (buf) - sizeof (" [");
+	while (*s && p < endp)  *p++ = *s++;
+
+	if (optn->arg_name) {
+
+	    if (flags & _CLIF_STRICT_NOEQUAL) {
+		*p++ = ' ';
+		if (flags & CLIF_OPTARG)  *p++ = '[';
+	    } else {
+		if (flags & CLIF_OPTARG)  *p++ = '[';
+		*p++ = '=';
+	    }
+
+	    s = optn->arg_name;
+	    endp = buf + sizeof (buf) - sizeof (",...]");
+	    while (*s && p < endp)  *p++ = *s++;
+
+	    if (flags & CLIF_SEVERAL) {
+		strcpy (p, ",...");
+		p += sizeof (",...") - 1;	/*  last '\0' ...  */
+	    }
+
+	    if (flags & CLIF_OPTARG)  *p++ = ']';
+	}
+
+	*p = '\0';
+
+	return buf;
+}
+
+static char *show_excl (const CLIF_option *option_list, int *cnt_p) {
+	static char buf[256];
+	const CLIF_option *optn;
+	char *p = buf;
+	char *endp = buf + sizeof (buf) - sizeof (EXCL_DLM);
+	int excl_cnt = 0;
+
+	*p = '\0';
+	if (cnt_p)  *cnt_p = 0;
+	if (!option_list)  return buf;
+
+	for (optn = option_list; optn->short_opt || optn->long_opt; optn++) {
+	    char *s;
+
+	    if (!(optn->flags & CLIF_EXCL))  continue;
+
+	    if (optn->short_opt)  s = show_short (optn);
+	    else  s = show_long (optn);
+
+	    if (excl_cnt > 0) {	    /*  i.e., second etc...  */
+		    strcpy (p, EXCL_DLM);
+		    p += sizeof (EXCL_DLM) - 1;
+	    }
+
+	    while (*s && p < endp)  *p++ = *s++;
+
+	    excl_cnt++;
+	}
+
+	*p = '\0';
+
+	if (cnt_p)  *cnt_p = excl_cnt;
+
+	return buf;
+}
+
+
+static int is_keyword (const CLIF_option *optn) {
+	unsigned int flags = optn->flags | curr.parse_flags;
+
+	return  (flags & _CLIF_STRICT_KEYWORD) != 0;
+}
+
+
+static void err_bad_opt (const char *arg, char c, int n) {
+	char sym = (*arg == '+') ? '+' : '-';
+
+	if (c)  err_report ("Bad option `%c%c' (argc %d)", sym, c, n);
+	else {
+	    char *p = strchr (arg, '=');
+	    const char *type = (*arg == sym) ? "option" : "keyword";
+
+	    if (p)
+		err_report ("Bad %s `%s' (with arg `%s') (argc %d)",
+							type, arg, p + 1, n);
+	    else
+		err_report ("Bad %s `%s' (argc %d)", type, arg, n);
+	}
+}
+
+static void err_bad_arg (const CLIF_option *optn, char c, int n) {
+	CLIF_option tmp = *optn;
+	char ss[80];
+	char *s;
+
+	tmp.arg_name = NULL;
+
+	if (c) {
+	    s = show_short (&tmp);	/*  always without arg...  */
+	    strncpy (ss, s, sizeof (ss));
+	    s = show_short (optn);
+	} else {
+	    s = show_long (&tmp);	/*  always without arg...  */
+	    strncpy (ss, s, sizeof (ss));
+	    s = show_long (optn);
+	}
+
+	err_report ("%s `%s' (argc %d) requires an argument: `%s'",
+		    (c || !is_keyword (optn)) ? "Option" : "Keyword", ss, n, s);
+}
+	
+static void err_bad_res (const CLIF_option *optn, char c,
+					const char *opt_arg, int n) {
+	CLIF_option tmp = *optn;
+	char *ss;
+	const char *type;
+
+	tmp.arg_name = NULL;
+
+	if (c) {
+	    ss = show_short (&tmp);
+	    type = "option";
+	} else {
+	    ss = show_long (&tmp);
+	    type = is_keyword (optn) ? "keyword" : "option";
+	}
+
+	if (optn->arg_name)
+	    err_report ("Cannot handle `%s' %s with arg `%s' (argc %d)",
+							ss, type, opt_arg, n);
+	else
+	    err_report ("Cannot handle `%s' %s (argc %d)", ss, type, n);
+}
+
+static void err_bad_excl (const CLIF_option *optn, char c, int n) {
+	CLIF_option tmp = *optn;
+	char *ss;
+	char *excl = show_excl (curr.option_list, 0);
+				/*  Note: show_(short|long)() nested!!! */
+
+	tmp.arg_name = NULL;
+
+	if (c)  ss = show_short (&tmp);
+	else  ss = show_long (&tmp);
+
+	err_report ("%s `%s' (argc %d): Only one of:\n    %s\n"
+		    "may be specified.",
+		    (c || !is_keyword (optn)) ? "Option" : "Keyword",
+							    ss, n, excl);
+}
+
+
+static CLIF_option *find_long (char *arg, char **arg_p,
+				unsigned int match, unsigned int nomatch) {
+	CLIF_option *optn;
+	CLIF_option *abbrev = NULL;
+	char *abbrev_arg = NULL;
+	int abbrev_found = 0;
+
+
+	for (optn = curr.option_list;
+		optn->short_opt || optn->long_opt;
+		    optn++
+	) {
+	    char *a;
+	    const char *o;
+	    unsigned int flags;
+
+	    if (!optn->long_opt)  continue;
+
+	    flags = curr.parse_flags | optn->flags;
+	    if (flags & nomatch)  continue;
+	    if (match && !(flags & match))  continue;	/*  XXX: optimize it */
+
+
+	    for (a = arg, o = optn->long_opt; *o && *a == *o; a++, o++) ;
+
+	    if (*a == '\0' ||
+		(*a == '=' && optn->arg_name && !(flags & _CLIF_STRICT_NOEQUAL))
+	    ) {	    /*  looks like end of option...  */
+
+		if (!*o) {	/*  explicit match found   */
+		    if (*a == '=' && arg_p)  *arg_p = a + 1;
+		    return optn;
+		}
+
+		if ((flags & CLIF_ABBREV) &&
+		    (a - arg >= CLIF_MIN_ABBREV)
+		) {
+		    if (!abbrev_found) {
+			abbrev_found = 1;
+			abbrev = optn;
+			if (*a == '=')  abbrev_arg = a + 1;
+		    } else	/*  several possibility case...  */
+			abbrev = NULL;
+		}
+	    }
+	}
+
+	if (abbrev) {	/*  implicit match found   */
+	    if (abbrev_arg && arg_p)  *arg_p = abbrev_arg;
+	    return abbrev;
+	} else		/*  no match found   */
+	    return NULL;
+}
+
+static int check_sym (const CLIF_option *optn, char sym) {
+
+	if (sym == '+') {
+	    if (!optn->function_plus)  return -1;
+	}
+	else if (sym == '-') {
+	    if (!optn->function && optn->function_plus)
+		    return -1;
+	}
+
+	return 0;
+}
+
+static int call_function (CLIF_option *optn, char *opt_arg, char sym) {
+	int (*function) (CLIF_option *, char *);
+
+	function = (sym == '+') ? optn->function_plus : optn->function;
+
+	if (!function)  return 0;
+
+	if (opt_arg && ((optn->flags | curr.parse_flags) & CLIF_SEVERAL)) {
+	    char tmp[80];
+	    char *t;
+	    char *endt = tmp + sizeof (tmp);
+
+	    while (*opt_arg) {
+    
+		t = tmp;
+		while (t < endt && *opt_arg &&
+		       *opt_arg != ' ' && *opt_arg != '\t' && *opt_arg != ','
+		)  *t++ = *opt_arg++;
+
+		if (t >= endt)  return -1;
+    
+		*t = '\0';
+    
+		if (function (optn, tmp) < 0)  return -1;
+    
+		while (*opt_arg == ' ' || *opt_arg == '\t' || *opt_arg == ',')
+			opt_arg++;
+	    }
+
+	    return 0;
+	}
+
+	return  function (optn, opt_arg);
+}
+
+
+int CLIF_parse_cmdline (int argc, char *argv[],
+			CLIF_option *option_list,
+			CLIF_argument *argument_list,
+			unsigned int parse_flags) {
+	int i, j;
+	CLIF_option *optn;
+	CLIF_argument *argm;
+	int num_args = 0;
+	int num_argm = 0, strict_beg = 0, strict_end = 0;
+	_CLIF_index arg_n[MAX_ARGC_NUMBER];
+	unsigned int dirty_flags = 0;
+	int dirty_plus = 0;
+	int exclusive_cnt = 0;
+	int posix = getenv ("POSIXLY_CORRECT") != NULL ||
+					    (parse_flags & CLIF_POSIX);
+
+	curr.argc = argc;
+	curr.argv = argv;
+	curr.option_list = option_list;
+	curr.argument_list = argument_list;
+	curr.parse_flags = parse_flags;
+
+	if (argc <= 1 && (parse_flags & CLIF_HELP_EMPTY)) {
+		CLIF_current_help ();
+		exit (0);
+	}
+
+	/*  Scan argument_list for check and some info.  */
+
+	if (argument_list) {
+	    enum stages { STRICT_BEG, OPTIONAL, STRICT_END };
+	    int stage = STRICT_BEG;
+
+	    for (argm = argument_list; argm->name; argm++) {
+		
+		if (argm->flags & CLIF_STRICT) {
+
+		    if (stage == STRICT_BEG)  strict_beg++;
+		    else if (stage == OPTIONAL) {
+			stage = STRICT_END;
+			strict_end++;
+		    }
+		    else if (stage == STRICT_END)
+			    strict_end++;
+		} else {
+		    if (stage == STRICT_BEG)  stage = OPTIONAL;
+		    else if (stage == STRICT_END) {
+			err_report ("Incorrect argument list set in program "
+				    "source: more than one optional area.");
+			return -1;
+		    }
+		}
+
+		num_argm++;
+	    }
+	}
+
+	/*  Scan option_list for some info.  */
+	if (option_list) {
+
+	    dirty_flags = parse_flags;
+
+	    for (optn = option_list;
+		    optn->short_opt || optn->long_opt;
+			optn++
+	    ) {
+		dirty_flags |= optn->flags;
+		if (optn->function_plus)  dirty_plus = 1;
+	    }
+	}
+
+	if (dirty_flags & CLIF_EXCL)
+		exclusive_cnt = 1;	/*  only one is allowed...  */
+
+
+	/*  Go !   Store arguments, parse options.  */
+
+	for (i = 1; i < argc; i++) {
+	    char *arg = argv[i];
+	    char *opt_arg = NULL;
+	    char sym = '-';
+
+	    if (!option_list)
+		    goto  handle_arg;
+
+	    if (*arg == '+' && dirty_plus)
+		    sym = '+';
+
+	    if (*arg != sym) {	/*  argument or keyword   */
+
+		if (dirty_flags & CLIF_MAY_KEYWORD) {
+		    optn = find_long (arg, &opt_arg, CLIF_MAY_KEYWORD, 0);
+		    if (optn)  goto long_found;
+		}
+
+		if (num_args == 0 && (parse_flags & CLIF_FIRST_GROUP)) {
+		    /*  ugly...  */
+		    parse_flags &= ~CLIF_FIRST_GROUP;
+		    dirty_flags &= ~CLIF_FIRST_GROUP;	/*  to be correct   */
+
+		    goto  handle_short;
+		}
+
+		/*  else it is an argument   */
+		goto  handle_arg;
+
+	    }
+	    else if (*++arg == sym) {	/*  `--' - long option   */
+		arg++;
+
+		if (*arg == sym ||	/*  `---' - let it be not option... */
+		    (parse_flags & (_CLIF_STRICT_KEYWORD|_CLIF_STRICT_ONEDASH)) 
+		) {
+		    arg -= 2;
+		    goto  handle_arg;	/*  not option anyway  */
+		}
+	
+		optn = find_long (arg, &opt_arg, 0,
+				_CLIF_STRICT_KEYWORD | _CLIF_STRICT_ONEDASH);
+		if (optn)  goto long_found;
+	
+		/*  XXX: May be allow only for `--', not `++' too...  */
+		if (!*arg && sym == '-') {  /*  `--' and no empty longoption */
+		    option_list = NULL;	    /*  POSIX way...  */
+		    continue;
+		}
+	
+		/*  XXX: or treat as an argument sometimes???  */
+		err_bad_opt (argv[i], 0, i);
+		return -1;
+	    }
+	    else {	/*  short option, or several short options...  */
+
+		if (dirty_flags & CLIF_MAY_ONEDASH) {
+		    optn = find_long (arg, &opt_arg, CLIF_MAY_ONEDASH, 0);
+		    if (optn)  goto long_found;
+		}
+    
+		if (!*arg) {	/*  POSIX say: only "stdout specification"... */
+		    arg--;
+		    goto handle_arg;
+		}
+    
+		goto  handle_short;
+	    }
+
+
+    long_found:	
+	    if (check_sym (optn, sym) < 0) {	/*  Oops...  */
+		err_bad_opt (argv[i], 0, i);
+		return -1;
+	    }
+
+	    if (optn->flags & CLIF_EXCL) {
+		if (!exclusive_cnt) {
+		    err_bad_excl (optn, 0, i);
+		    return -1;
+		}
+		exclusive_cnt--;
+	    }
+		
+	    if (optn->arg_name && !opt_arg) {
+		unsigned int flags = optn->flags | parse_flags;
+
+		if (++i >= argc ||
+		    !(flags & CLIF_MAY_NOEQUAL)
+		) {	/*  missing opt arg   */
+		    i--;
+
+		    if (!(flags & CLIF_OPTARG)) {
+			err_bad_arg (optn, 0, i);
+			return -1;
+		    }
+
+		    opt_arg = NULL;
+		} else
+		    opt_arg = argv[i];
+		   
+	    }
+
+
+	    if (call_function (optn, opt_arg, sym) < 0) {
+		err_bad_res (optn, 0, opt_arg, i);
+		return -1;
+	    }
+
+	    if (optn->flags & CLIF_EXIT)
+		    exit (0);
+
+	    continue;
+
+
+    handle_arg:
+	    if (argument_list) {
+		if (i < MAX_ARGC_NUMBER)    /*  XXX: ugly, better report   */
+			arg_n[num_args++] = i;
+	    } else {
+		err_report ("`%s' (argc %d): arguments are not allowed",
+								 argv[i], i);
+		return -1;
+	    }
+
+	    /*  POSIX say: No more options after args...  */
+	    if (posix)  option_list = NULL;	/*  geniously...  */
+	
+	    continue;
+
+
+    handle_short:
+
+	    opt_arg = NULL;
+
+	    do {
+
+		for (optn = option_list;
+			optn->short_opt || optn->long_opt;
+			    optn++
+		) {
+		    if (optn->short_opt && optn->short_opt[0] == *arg)
+			    break;
+		}
+		if (!optn->short_opt ||
+		    check_sym (optn, sym) < 0
+		) {
+		    err_bad_opt (argv[i], *arg, i);
+		    return -1;
+		}
+
+		if (optn->flags & CLIF_EXCL) {
+		    if (!exclusive_cnt) {
+			err_bad_excl (optn, *arg, i);
+			return -1;
+		    }
+		    exclusive_cnt--;
+		}
+
+
+		if (optn->arg_name) {
+		    unsigned int flags = parse_flags | optn->flags;
+
+		    if (arg[1] == '\0') {	/*  a last one   */
+
+			/*  POSIX say: an option with arg cannot be grouped. */
+			if (posix && arg != argv[i] && arg[-1] != sym) {
+				err_bad_arg (optn, *arg, i);	/*  good way? */
+				return -1;
+			}
+
+			if (++i >= argc ||
+			    (flags & _CLIF_STRICT_JOIN_ARG)
+			) {
+			    i--;
+
+			    if (!(flags & CLIF_OPTARG)) {
+				err_bad_arg (optn, *arg, i);
+				return -1;
+			    }
+
+			    opt_arg = NULL;
+			} else
+			    opt_arg = argv[i];
+		    }
+		    else if ((arg == argv[i] || arg[-1] == sym) &&	
+			     (flags & CLIF_MAY_JOIN_ARG)
+		    ) {
+			opt_arg = ++arg;
+		    }
+		    else {	/*  inside a group...  */
+			if (!(flags & CLIF_OPTARG) ||
+			    (flags & CLIF_MAY_JOIN_ARG)
+			) {
+			    err_bad_arg (optn, *arg, i);
+			    return -1;
+			}
+
+			opt_arg = NULL;
+		    }
+		}
+
+		if (call_function (optn, opt_arg, sym) < 0) {
+		    err_bad_res (optn, optn->short_opt[0], opt_arg, i);
+		    return -1;
+		}
+
+		if (optn->flags & CLIF_EXIT)
+			exit (0);
+
+	    } while (!opt_arg && *++arg);
+
+	}	/*  for ( ...  )   */
+
+
+	if ((parse_flags & CLIF_STRICT_EXCL) && exclusive_cnt != 0) {
+		err_report ("One of these must be specified:\n    %s\n",
+						    show_excl (option_list, 0));
+		return -1;
+	}
+
+
+	/*  Now, after *ALL* options, handle arguments, if any.  */
+
+	if (num_args < strict_beg + strict_end) {
+	    /*  Missing some needed arguments.  */
+
+	    if (num_args < strict_beg)  argm = argument_list + num_args;
+	    else
+		argm = argument_list +
+			    ((num_args - strict_beg) + (num_argm - strict_end));
+
+	    if (num_args == strict_beg + strict_end - 1)
+		err_report ("Specify \"%s\" missing argument.", argm->name);
+	    else
+		err_report ("Specify \"%s\" and other missing arguments.",
+								    argm->name);
+	    return -1;
+	}
+
+	if (num_args > 0) {
+	    _CLIF_index argm_index[MAX_ARGC_NUMBER];
+
+	    /*  assing argm (by index) for each arg...  */
+		    
+	    for (i = 0, j = 0; i < strict_beg; i++, j++)
+		    argm_index[i] = j;
+	    for (i = num_args - strict_end, j = num_argm - strict_end;
+			i < num_args; i++, j++
+	    )  argm_index[i] = j;
+	    for (i = strict_beg, j = strict_beg;
+		    i < num_args - strict_end && j < num_argm - strict_end;
+			i++
+	    ) {
+		argm_index[i] = j;
+		if (!(argument_list[j].flags & CLIF_MORE))
+			j++;
+	    }
+
+	    if (i < num_args - strict_end) {	/*  there are extra args...  */
+		err_report ("Extra arg `%s' (position %d, argc %d)",
+				    argv[arg_n[i]], i + 1, arg_n[i]);
+		return -1;
+	    }
+
+	    if (j < num_argm - strict_end &&	
+		!(argument_list[j].flags & CLIF_MORE) &&
+		/*  ...i.e, there are some missing optional args...  */
+		(argument_list[j].flags & CLIF_ACC_PREV)
+	    ) {
+		if (j == 0)
+		    err_report ("Incorrect argument list set: first arg "
+				"cannot be `accompanied with previous'.");
+		else
+		    err_report ("Arg \"%s\" must be specified because "
+				"\"%s\" `%s' is used.", argument_list[j].name,
+				argument_list[j - 1].name, argv[arg_n[i - 1]]);
+		return -1;
+	    }
+		
+	    if (argm_index[--i] == j &&
+		    /*  above is true only after OPTIONAL area scan
+		       and when `j' is stopped on CLIF_MORE  */
+		++j < num_argm - strict_end
+		    /*  i.e: there is a *last* one (after CLIF_MORE)
+			in the OPTIONAL area  */
+	    )  argm_index[i] = j;	/*  *last* is better than *more*   */
+		    
+
+	    /*  ...and work now   */
+
+	    for (i = 0; i < num_args; i++) {
+		argm = argument_list + argm_index[i];
+
+		if (argm->function &&
+		    argm->function (argm, argv[arg_n[i]], i) < 0
+		) {
+		    err_report ("Cannot handle \"%s\" cmdline arg `%s' "
+				"on position %d (argc %d)",
+				argm->name, argv[arg_n[i]], i + 1, arg_n[i]);
+		    return -1;
+		}
+	    }
+
+	    /*  That`s all.  */
+	}
+
+	return 0;
+}
+
+
+static void box_output (int start, int left, int width, const char *str,
+							const char *arg_name) {
+	char *p, *endp, *s;
+	int l;
+	char buf[1024];
+	char spacer[128];	/*  assume it is enough   */
+
+	if (left > sizeof (spacer) - 2)  left = sizeof (spacer) - 2;
+	if (width > sizeof (buf) - 1)  width = sizeof (buf) - 1;
+
+	spacer[0] = '\n';
+	memset (spacer + 1, ' ', left);
+	spacer[left + 1] = '\0';
+
+
+	l = left - start;
+	if (l > 0) {
+	    memset (buf, ' ', l);
+	    buf[l] = '\0';
+	    fprintf (stderr, "%s", buf);
+	} else 
+	    fprintf (stderr, "%s", spacer);
+
+
+	endp = buf + width;
+
+	p = buf;
+
+	while (*str) {
+
+	    while (*str && p < endp) {
+    
+		if (*str == '%' && arg_name) {
+		    if (str[1] == '%') {
+			*p++ = '%';
+			str += 2;
+			continue;
+		    } 
+		    else if (str[1] == 's') {
+			const char *a = arg_name;
+    
+			while (*a && p < endp)  *p++ = *a++;
+			str += 2;
+			continue;
+		    } 
+		}
+    
+		*p++ = *str++;
+	    }
+    
+	    *p = '\0';
+    
+	    if (p < endp)  break;
+
+    
+	    while (p > buf && *p != ' ' && *p != '\t')  p--;
+	    if (p <= buf)  return;	/*  foo on you   */
+		    
+	    *p = '\0';
+	    fprintf (stderr, "%s", buf);
+	    fprintf (stderr, "%s", spacer);
+		
+	    p++;
+	    for (s = buf; *p; *s++ = *p++) ;
+	    *s = '\0';
+	    p = s;
+	}
+
+
+	fprintf (stderr, "%s", buf);
+		
+	return;
+}
+
+
+#define SHORT_LONG_DLM	"  "
+#define OPT_START_DLM	"  "
+#define OPT_FIELD_WIDTH	30
+
+#define ARG_MARK_STRICT	"+     "
+#define ARG_MARK_GROUP0	"  .   "
+#define ARG_MARK_GROUP	"  '   "
+#define ARG_MARK_OPT	"      "
+#define ARG_FIELD_WIDTH	20
+
+#define SCREEN_WIDTH	80
+
+
+void CLIF_print_options (const char *header,
+				const CLIF_option *option_list) {
+	const CLIF_option *optn;
+	char *excl;
+	int excl_cnt = 0;
+
+	/*  Print a header string, if present...  */
+	if (header)  fprintf (stderr, "%s\n", header);
+
+	if (!option_list)  return;
+
+
+	for (optn = option_list; optn->short_opt || optn->long_opt; optn++) {
+	    int len;
+
+	    /*  generate and print an option usage   */
+
+	    if (optn->short_opt) {
+		if (optn->long_opt)
+		    len = fprintf (stderr, OPT_START_DLM "%s"
+					   SHORT_LONG_DLM "%s",
+					show_short (optn), show_long (optn));
+		else
+		    len = fprintf (stderr, OPT_START_DLM "%s",
+						    show_short (optn));
+	    } else
+		len = fprintf (stderr, OPT_START_DLM "%s", show_long (optn));
+
+
+	    /*  print a help string, if present   */
+	    
+	    if (optn->help_string)
+		    box_output (len, OPT_FIELD_WIDTH,
+				SCREEN_WIDTH - OPT_FIELD_WIDTH,
+				optn->help_string, optn->arg_name);
+
+	    fprintf (stderr, "\n");	/*  a last one   */
+	}
+
+	excl = show_excl (option_list, &excl_cnt);
+	if (excl_cnt > 0) {
+
+	    if (excl_cnt == 1) {
+		if ((curr.parse_flags & CLIF_STRICT_EXCL) &&
+		    curr.option_list == option_list
+		)  fprintf (stderr, "Anyway `%s' must be specified.\n", excl);
+		else  /*  simple ordinary option, because excl_cnt == 1 ... */;
+	    } else
+	        fprintf (stderr, "Only one of these may be specified:\n"
+				 "    %s\n", excl);
+	}
+
+	return;
+}
+		    
+
+void CLIF_print_arguments (const char *header,
+				const CLIF_argument *argument_list) {
+	const CLIF_argument *argm;
+
+
+	if (!argument_list)  return;
+
+	/*  Print a header string, if present...  */
+	if (header)  fprintf (stderr, "%s\n", header);
+
+
+	for (argm = argument_list; argm->name; argm++) {
+	    int len;
+
+	    if (argm->flags & CLIF_STRICT)
+		len = fprintf (stderr, ARG_MARK_STRICT "%s", argm->name);
+	    else if (argm->flags & CLIF_MORE)
+		len = fprintf (stderr, ARG_MARK_OPT "%s ...", argm->name);
+	    else if (argm->flags & CLIF_ACC_PREV)
+		len = fprintf (stderr, ARG_MARK_GROUP "%s", argm->name);
+	    else if ((argm + 1)->name && ((argm + 1)->flags & CLIF_ACC_PREV))
+		len = fprintf (stderr, ARG_MARK_GROUP0 "%s", argm->name);
+	    else
+		len = fprintf (stderr, ARG_MARK_OPT "%s", argm->name);
+
+	    if (argm->help_string)
+		    box_output (len, ARG_FIELD_WIDTH,
+				    SCREEN_WIDTH - ARG_FIELD_WIDTH,
+				    argm->help_string, argm->name);
+
+	    fprintf (stderr, "\n");
+	}
+
+	return;
+}
+
+
+void CLIF_print_usage (const char *header, const char *progname, 
+				const CLIF_option *option_list,
+				const CLIF_argument *argument_list) {
+
+	if (!progname && curr.argv)
+		progname = curr.argv[0];
+
+	if (!header) {
+	    if (progname)
+		fprintf (stderr, "Usage: %s", progname);
+	    else
+		fprintf (stderr, "Command line options:");
+	} else {
+	    if (progname)
+		fprintf (stderr, "%s\n" OPT_START_DLM "%s", header, progname);
+	    else
+		fprintf (stderr, "%s", header);
+	}
+
+
+	if (option_list) {
+	    const CLIF_option *optn;
+	    char m_buf[256], p_buf[256], mp_buf[256];
+	    char *m = m_buf, *p = p_buf, *mp = mp_buf;
+	    char *end_m = m_buf + sizeof (m_buf) - 1;
+	    char *end_p = p_buf + sizeof (p_buf) - 1;
+	    char *end_mp = mp_buf + sizeof (mp_buf) - 1;
+	    char *excl;
+	    int excl_cnt = 0;
+
+
+	    /*  first, show exclusive option list, if any...  */
+
+	    excl = show_excl (option_list, &excl_cnt);
+	    if (excl_cnt > 0) {
+		if ((curr.parse_flags & CLIF_STRICT_EXCL) &&
+		    curr.option_list == option_list
+		) {
+		    if (excl_cnt == 1)
+			    fprintf (stderr, " %s", excl);
+		    else
+			fprintf (stderr, " { %s }", excl);
+		} else
+		    fprintf (stderr, " [ %s ]", excl);
+	    }
+
+
+	    /*  second, find short options without arguments...  */
+
+	    for (optn = option_list;
+		    optn->short_opt || optn->long_opt;
+			optn++
+	    ) {
+		/*  We don`t exclude CLIF_EXTRA hear:
+		   simple one char don`t eat a lot of space...
+		*/
+
+		if (!optn->short_opt ||
+		    optn->arg_name ||
+		    (optn->flags & CLIF_EXCL)
+		)  continue;
+
+		if (optn->function_plus) {
+		    if (optn->function) {
+			if (mp < end_mp)  *mp++ = optn->short_opt[0];
+		    } else {
+			if (p < end_p)  *p++ = optn->short_opt[0];
+		    }
+		} else {
+		    if (m < end_m)  *m++ = optn->short_opt[0];
+		}
+	    }
+
+	    if (m > (char *) m_buf) {
+		*m = '\0';
+		fprintf (stderr, " [ -%s ]", m_buf);
+	    }
+	    if (p > (char *) p_buf) {
+		*p = '\0';
+		fprintf (stderr, " [ +%s ]", p_buf);
+	    }
+	    if (mp > (char *) mp_buf) {
+		*mp = '\0';
+		fprintf (stderr, " [ " SHORT_PLUS_MINUS "%s ]", mp_buf);
+	    }
+
+
+	    /*  third, print all another...  */
+
+	    for (optn = option_list;
+		    optn->short_opt || optn->long_opt;
+			optn++
+	    ) {
+		if (optn->flags & CLIF_EXTRA)  continue;
+
+		if (optn->flags & CLIF_EXCL)
+			continue;	/*  already handled   */
+
+		if (optn->short_opt) {
+		    if (optn->arg_name) 
+			fprintf (stderr, " [ %s ]", show_short (optn));
+		    else
+			/*  already handled   */;
+		} else
+		    fprintf (stderr, " [ %s ]", show_long (optn));
+	    }
+	}
+		        
+
+	if (argument_list) {
+	    const CLIF_argument *argm;
+	    int deep = 0;
+
+	    for (argm = argument_list; argm->name; argm++) {
+
+		if (argm->flags & CLIF_STRICT) {
+		    if (deep > 0) {
+			fputc (' ', stderr);
+			while (deep--)  fputc (']', stderr);
+			deep = 0;
+		    }
+			
+		    fprintf (stderr, " %s", argm->name);
+		} else {
+		    if (argm->flags & CLIF_MORE)
+			    fprintf (stderr, " [ %s ...", argm->name);
+		    else if (argm->flags & CLIF_ACC_PREV) {
+			    fprintf (stderr, " %s", argm->name);
+			    --deep;	/*  ugly, but easy   */
+		    } else
+			fprintf (stderr, " [ %s", argm->name);
+
+		    deep++;
+		}
+	    }
+
+	    if (deep > 0) {
+		fputc (' ', stderr);
+		while (deep--)  fputc (']', stderr);
+	    }
+	}
+
+
+	fprintf (stderr, "\n");
+}
+
+
+int CLIF_current_help (void) {
+
+	if (!curr.argc)  return -1;	/*  i.e., not inited...  */
+
+	CLIF_print_usage ("Usage:", curr.argv[0], curr.option_list,
+							curr.argument_list);
+
+	if (curr.option_list)
+		CLIF_print_options ("Options:", curr.option_list);
+	
+	if (curr.argument_list)
+		CLIF_print_arguments ("\nArguments:", curr.argument_list);
+
+	return 0;
+}
+
+
+/*  Common useful option handlers.  */
+
+int CLIF_version_handler (CLIF_option *optn, char *arg) {
+
+	if (!optn->data)  return -1;
+
+	fprintf (stderr, "%s\n", ((char *) optn->data));
+
+	return 0;	/*  be happy   */
+}
+	
+
+int CLIF_set_flag (CLIF_option *optn, char *arg) {
+
+	if (!optn->data)  return -1;
+
+	*((int *) optn->data) = 1;
+
+	return 0;
+}
+
+
+int CLIF_unset_flag (CLIF_option *optn, char *arg) {
+
+	if (!optn->data)  return -1;
+
+	*((int *) optn->data) = 0;
+
+	return 0;
+}
+
+
+static int set_string (char **data, char *arg) {
+
+	if (!data)  return -1;
+
+	*data = arg;
+
+	return 0;
+}
+
+int CLIF_set_string (CLIF_option *optn, char *arg) {
+
+	return  set_string (optn->data, arg);
+}
+
+int CLIF_arg_string (CLIF_argument *argm, char *arg, int index) {
+
+	return  set_string (argm->data, arg);
+}
+
+
+static int set_int (int *data, char *arg) {
+	char *q;
+
+	if (!data)  return -1;
+
+	*data = (int) strtol (arg, &q, 0);
+
+	return  (q == arg || *q) ? -1 : 0;
+}
+
+static int set_uint (unsigned int *data, char *arg) {
+	char *q;
+
+	if (!data)  return -1;
+
+	*data = (unsigned int) strtoul (arg, &q, 0);
+
+	return  (q == arg || *q) ? -1 : 0;
+}
+
+static int set_double (double *data, char *arg) {
+	char *q;
+
+	if (!data)  return -1;
+
+	*data = strtod (arg, &q);
+
+	return  (q == arg || *q) ? -1 : 0;
+}
+
+
+int CLIF_set_int (CLIF_option *optn, char *arg) {
+
+	return  set_int (optn->data, arg);
+}
+
+int CLIF_set_uint (CLIF_option *optn, char *arg) {
+
+	return  set_uint (optn->data, arg);
+}
+
+int CLIF_set_double (CLIF_option *optn, char *arg) {
+
+	return  set_double (optn->data, arg);
+}
+
+int CLIF_arg_int (CLIF_argument *argm, char *arg, int index) {
+
+	return  set_int (argm->data, arg);
+}
+
+int CLIF_arg_uint (CLIF_argument *argm, char *arg, int index) {
+
+	return  set_uint (argm->data, arg);
+}
+
+int CLIF_arg_double (CLIF_argument *argm, char *arg, int index) {
+
+	return  set_double (argm->data, arg);
+}
+
+
+int CLIF_call_func (CLIF_option *optn, char *arg) {
+
+	if (!optn->data)  return -1;
+
+	if (optn->arg_name) {
+	    int (*func) (char *) = optn->data;
+
+	    return  func (arg);
+	} else {
+	    int (*func) (void) = optn->data;
+
+	    return  func ();
+	}
+}
+
+int CLIF_arg_func (CLIF_argument *argm, char *arg, int index) {
+	int (*func) (char *, int);
+
+	if (!argm->data)  return -1;
+
+	func = (int (*) (char *, int)) argm->data;
+
+	return  func (arg, index);
+}
+
diff --git a/libsupp/clif.h b/libsupp/clif.h
new file mode 100644
index 0000000..c798a8d
--- /dev/null
+++ b/libsupp/clif.h
@@ -0,0 +1,121 @@
+/*
+    Copyright (c)  2000, 2003		Dmitry Butskoy
+					<buc@citadel.stu.neva.ru>
+    License:  LGPL v2.1 or any later
+
+    See COPYING.LIB for the status of this software.
+*/
+
+#ifndef _CLIF_H
+#define _CLIF_H
+
+
+typedef struct CLIF_option_struct CLIF_option;
+struct CLIF_option_struct {
+	const char *short_opt;
+	const char *long_opt;
+	const char *arg_name;
+	const char *help_string;
+	int (*function) (CLIF_option *optn, char *arg);
+	void *data;
+	int (*function_plus) (CLIF_option *optn, char *arg);
+	unsigned int flags;
+};
+#define CLIF_END_OPTION	    { 0, 0, 0, 0, 0, 0, 0, 0 }
+
+typedef struct CLIF_argument_struct CLIF_argument;
+struct CLIF_argument_struct {
+	const char *name;
+	const char *help_string;
+	int (*function) (CLIF_argument *argm, char *arg, int index);
+	void *data;
+	unsigned int flags;
+};
+#define CLIF_END_ARGUMENT   { 0, 0, 0, 0, 0 }
+
+/*  Argument flag bits.  */
+#define CLIF_MORE	(0x01)	/*  null or several  */
+#define CLIF_STRICT	(0x02)	/*  arg must be present   */
+#define CLIF_ACC_PREV	(0x04)  /*  arg must be accompanied with previous  */
+
+
+/*  Option flag bits.  */
+
+/*  affected only by per-option flags   */
+#define CLIF_EXTRA		(0x0001)  /*  don`t show in usage line   */
+#define CLIF_EXIT		(0x0002)  /*  exit after handler return   */
+#define CLIF_EXCL		(0x0004)  /*  at exclusive area  */
+
+/*  affected by per-option flags and by common `parse_flags' argument
+  of CLIF_parse_cmdline(). In last case appropriate bits are translated
+  for all the options.
+*/
+#define CLIF_MAY_JOIN_ARG	(0x0010)
+#define _CLIF_STRICT_JOIN_ARG	(0x0020)
+#define CLIF_JOIN_ARG		(CLIF_MAY_JOIN_ARG|_CLIF_STRICT_JOIN_ARG)
+#define CLIF_MAY_NOEQUAL	(0x0040)
+#define _CLIF_STRICT_NOEQUAL	(0x0080)
+#define CLIF_NOEQUAL		(CLIF_MAY_NOEQUAL|_CLIF_STRICT_NOEQUAL)
+#define CLIF_MAY_KEYWORD	(0x0100)
+#define _CLIF_STRICT_KEYWORD	(0x0200)
+#define CLIF_KEYWORD		(CLIF_MAY_KEYWORD|_CLIF_STRICT_KEYWORD)
+#define CLIF_MAY_ONEDASH	(0x0400)
+#define _CLIF_STRICT_ONEDASH	(0x0800)
+#define CLIF_ONEDASH		(CLIF_MAY_ONEDASH|_CLIF_STRICT_ONEDASH)
+#define CLIF_OPTARG		(0x1000)  /*  allow missing optarg   */
+#define CLIF_ABBREV		(0x2000)  /*  allow long opt abbreviation  */
+#define CLIF_SEVERAL		(0x4000)  /*  several args in one opt`s arg  */
+
+/*  affected only by common `parse_flags' arg of CLIF_parse_cmdline() .  */
+#define CLIF_HELP_EMPTY		(0x10000) /*  print help on empty cmdline  */
+#define CLIF_POSIX		(0x20000) /*  follow POSIX standard  */
+#define CLIF_FIRST_GROUP	(0x40000) /*  first arg - options` group   */
+#define CLIF_STRICT_EXCL	(0x80000) /*  at least one exclusive  */
+#define CLIF_SILENT		(0x100000)	/*  no errors on stderr   */
+
+#define CLIF_MIN_ABBREV	2	/*  a minimal match length in abbrev  */
+
+
+extern int CLIF_parse (int argc, char **argv, CLIF_option *option_list,
+			    CLIF_argument *arg_list, unsigned int parse_flags);
+/*  history compatibility...  */
+#define CLIF_parse_cmdline(ARGC,ARGV,OPTN,ARGS,FLAGS)	\
+		CLIF_parse (ARGC, ARGV, OPTN, ARGS, FLAGS)
+
+extern void CLIF_print_options (const char *header,
+					const CLIF_option *option_list);
+extern void CLIF_print_arguments (const char *header,
+					const CLIF_argument *argument_list);
+extern void CLIF_print_usage (const char *header, const char *progname, 
+					const CLIF_option *option_list,
+					const CLIF_argument *argument_list);
+
+extern int CLIF_current_help (void);
+
+/*  Common useful option handlers.  */
+extern int CLIF_version_handler (CLIF_option *optn, char *arg);
+extern int CLIF_set_flag (CLIF_option *optn, char *arg);
+extern int CLIF_unset_flag (CLIF_option *optn, char *arg);
+extern int CLIF_set_string (CLIF_option *optn, char *arg);
+extern int CLIF_set_int (CLIF_option *optn, char *arg);
+extern int CLIF_set_uint (CLIF_option *optn, char *arg);
+extern int CLIF_set_double (CLIF_option *optn, char *arg);
+extern int CLIF_call_func (CLIF_option *optn, char *arg);
+
+extern int CLIF_arg_string (CLIF_argument *argm, char *arg, int index);
+extern int CLIF_arg_int (CLIF_argument *argm, char *arg, int index);
+extern int CLIF_arg_uint (CLIF_argument *argm, char *arg, int index);
+extern int CLIF_arg_double (CLIF_argument *argm, char *arg, int index);
+extern int CLIF_arg_func (CLIF_argument *argm, char *arg, int index);
+
+
+/*  Some useful macros.  */
+
+#define CLIF_HELP_OPTION    \
+	{ 0, "help", 0, "Read this help and exit",	\
+		CLIF_call_func, CLIF_current_help, 0, CLIF_EXTRA | CLIF_EXIT }
+#define CLIF_VERSION_OPTION(STR)  \
+	{ "V", "version", 0, "Print version info and exit",	\
+		CLIF_version_handler, STR, 0, CLIF_EXTRA | CLIF_EXIT }
+
+#endif	/*  _CLIF_H   */