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377 lines
9.5 KiB
C
377 lines
9.5 KiB
C
/*
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* Copyright (c) 1997, 1998 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kungliga Tekniska
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* Högskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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RCSID("$Id: getarg.c,v 1.25 1998/11/22 09:45:05 assar Exp $");
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#endif
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#include <sys/ttycom.h>
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#include <time.h>
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#include <stdio.h>
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#include "getarg.h"
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#define ISFLAG(X) ((X).type == arg_flag || (X).type == arg_negative_flag)
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static size_t
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print_arg (char *string, size_t len, int mdoc, int longp, struct getargs *arg)
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{
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const char *s;
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*string = '\0';
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if (ISFLAG(*arg))
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return 0;
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if(mdoc){
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if(longp)
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strncat(string, "= Ns", len);
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strncat(string, " Ar ", len);
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}else
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if (longp)
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strncat (string, "=", len);
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else
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strncat (string, " ", len);
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if (arg->arg_help)
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s = arg->arg_help;
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else if (arg->type == arg_integer)
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s = "number";
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else if (arg->type == arg_string)
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s = "string";
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else
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s = "<undefined>";
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strncat(string, s, len);
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return 1 + strlen(s);
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}
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static int
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check_column(FILE *f, int col, int len, int columns)
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{
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if(col + len > columns) {
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fprintf(f, "\n");
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col = fprintf(f, " ");
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}
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return col;
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}
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void
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arg_printusage (struct getargs *args,
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size_t num_args,
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const char *progname,
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const char *extra_string)
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{
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int i;
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size_t max_len = 0;
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char buf[128];
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int col = 0, columns;
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struct winsize ws;
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columns = 80;
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col = 0;
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col += fprintf (stderr, "Usage: %s", progname);
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for (i = 0; i < num_args; ++i) {
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size_t len = 0;
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if (args[i].long_name) {
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buf[0] = '\0';
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strncat(buf, "[--", sizeof(buf));
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len += 2;
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if(args[i].type == arg_negative_flag) {
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strncat(buf, "no-", sizeof(buf));
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len += 3;
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}
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strncat(buf, args[i].long_name, sizeof(buf));
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len += strlen(args[i].long_name);
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len += print_arg(buf + strlen(buf), sizeof(buf) - strlen(buf),
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0, 1, &args[i]);
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strncat(buf, "]", sizeof(buf));
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if(args[i].type == arg_strings)
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strncat(buf, "...", sizeof(buf));
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col = check_column(stderr, col, strlen(buf) + 1, columns);
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col += fprintf(stderr, " %s", buf);
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}
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if (args[i].short_name) {
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snprintf(buf, sizeof(buf), "[-%c", args[i].short_name);
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len += 2;
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len += print_arg(buf + strlen(buf), sizeof(buf) - strlen(buf),
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0, 0, &args[i]);
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strncat(buf, "]", sizeof(buf));
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if(args[i].type == arg_strings)
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strncat(buf, "...", sizeof(buf));
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col = check_column(stderr, col, strlen(buf) + 1, columns);
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col += fprintf(stderr, " %s", buf);
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}
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if (args[i].long_name && args[i].short_name)
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len += 2; /* ", " */
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max_len = max(max_len, len);
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}
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if (extra_string) {
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col = check_column(stderr, col, strlen(extra_string) + 1, columns);
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fprintf (stderr, " %s\n", extra_string);
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} else
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fprintf (stderr, "\n");
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for (i = 0; i < num_args; ++i) {
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if (args[i].help) {
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size_t count = 0;
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if (args[i].short_name) {
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count += fprintf (stderr, "-%c", args[i].short_name);
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print_arg (buf, sizeof(buf), 0, 0, &args[i]);
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count += fprintf(stderr, "%s", buf);
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}
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if (args[i].short_name && args[i].long_name)
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count += fprintf (stderr, ", ");
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if (args[i].long_name) {
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count += fprintf (stderr, "--");
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if (args[i].type == arg_negative_flag)
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count += fprintf (stderr, "no-");
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count += fprintf (stderr, "%s", args[i].long_name);
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print_arg (buf, sizeof(buf), 0, 1, &args[i]);
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count += fprintf(stderr, "%s", buf);
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}
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while(count++ <= max_len)
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putc (' ', stderr);
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fprintf (stderr, "%s\n", args[i].help);
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}
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}
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}
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static void
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add_string(getarg_strings *s, char *value)
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{
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s->strings = realloc(s->strings, (s->num_strings + 1) * sizeof(*s->strings));
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s->strings[s->num_strings] = value;
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s->num_strings++;
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}
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static int
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arg_match_long(struct getargs *args, size_t num_args,
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char *argv)
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{
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int i;
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char *optarg = NULL;
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int negate = 0;
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int partial_match = 0;
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struct getargs *partial = NULL;
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struct getargs *current = NULL;
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int argv_len;
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char *p;
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argv_len = strlen(argv);
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p = strchr (argv, '=');
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if (p != NULL)
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argv_len = p - argv;
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for (i = 0; i < num_args; ++i) {
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if(args[i].long_name) {
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int len = strlen(args[i].long_name);
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char *p = argv;
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int p_len = argv_len;
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negate = 0;
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for (;;) {
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if (strncmp (args[i].long_name, p, p_len) == 0) {
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if(p_len == len)
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current = &args[i];
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else {
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++partial_match;
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partial = &args[i];
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}
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optarg = p + p_len;
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} else if (ISFLAG(args[i]) && strncmp (p, "no-", 3) == 0) {
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negate = !negate;
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p += 3;
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p_len -= 3;
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continue;
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}
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break;
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}
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if (current)
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break;
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}
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}
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if (current == NULL) {
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if (partial_match == 1)
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current = partial;
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else
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return ARG_ERR_NO_MATCH;
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}
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if(*optarg == '\0' && !ISFLAG(*current))
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return ARG_ERR_NO_MATCH;
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switch(current->type){
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case arg_integer:
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{
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int tmp;
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if(sscanf(optarg + 1, "%d", &tmp) != 1)
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return ARG_ERR_BAD_ARG;
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*(int*)current->value = tmp;
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return 0;
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}
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case arg_string:
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{
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*(char**)current->value = optarg + 1;
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return 0;
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}
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case arg_strings:
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{
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add_string((getarg_strings*)current->value, optarg + 1);
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return 0;
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}
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case arg_flag:
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case arg_negative_flag:
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{
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int *flag = current->value;
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if(*optarg == '\0' ||
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strcmp(optarg + 1, "yes") == 0 ||
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strcmp(optarg + 1, "true") == 0){
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*flag = !negate;
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return 0;
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} else if (*optarg && strcmp(optarg + 1, "maybe") == 0) {
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*flag = rand() & 1;
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} else {
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*flag = negate;
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return 0;
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}
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return ARG_ERR_BAD_ARG;
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}
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default:
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abort ();
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}
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}
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int
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getarg(struct getargs *args, size_t num_args,
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int argc, char **argv, int *optind)
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{
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int i, j, k;
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int ret = 0;
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srand (time(NULL));
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(*optind)++;
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for(i = *optind; i < argc; i++) {
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if(argv[i][0] != '-')
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break;
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if(argv[i][1] == '-'){
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if(argv[i][2] == 0){
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i++;
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break;
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}
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ret = arg_match_long (args, num_args, argv[i] + 2);
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if(ret)
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return ret;
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}else{
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for(j = 1; argv[i][j]; j++) {
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for(k = 0; k < num_args; k++) {
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char *optarg;
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if(args[k].short_name == 0)
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continue;
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if(argv[i][j] == args[k].short_name){
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if(args[k].type == arg_flag){
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*(int*)args[k].value = 1;
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break;
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}
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if(args[k].type == arg_negative_flag){
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*(int*)args[k].value = 0;
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break;
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}
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if(argv[i][j + 1])
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optarg = &argv[i][j + 1];
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else{
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i++;
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optarg = argv[i];
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}
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if(optarg == NULL)
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return ARG_ERR_NO_ARG;
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if(args[k].type == arg_integer){
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int tmp;
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if(sscanf(optarg, "%d", &tmp) != 1)
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return ARG_ERR_BAD_ARG;
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*(int*)args[k].value = tmp;
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goto out;
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}else if(args[k].type == arg_string){
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*(char**)args[k].value = optarg;
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goto out;
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}else if(args[k].type == arg_strings){
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add_string((getarg_strings*)args[k].value, optarg);
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goto out;
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}
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return ARG_ERR_BAD_ARG;
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}
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}
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if (k == num_args)
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return ARG_ERR_NO_MATCH;
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}
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out:;
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}
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}
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*optind = i;
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return 0;
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}
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#if TEST
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int foo_flag = 2;
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int flag1 = 0;
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int flag2 = 0;
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int bar_int;
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char *baz_string;
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struct getargs args[] = {
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{ NULL, '1', arg_flag, &flag1, "one", NULL },
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{ NULL, '2', arg_flag, &flag2, "two", NULL },
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{ "foo", 'f', arg_negative_flag, &foo_flag, "foo", NULL },
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{ "bar", 'b', arg_integer, &bar_int, "bar", "seconds"},
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{ "baz", 'x', arg_string, &baz_string, "baz", "name" },
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};
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int main(int argc, char **argv)
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{
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int optind = 0;
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while(getarg(args, 5, argc, argv, &optind))
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printf("Bad arg: %s\n", argv[optind]);
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printf("flag1 = %d\n", flag1);
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printf("flag2 = %d\n", flag2);
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printf("foo_flag = %d\n", foo_flag);
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printf("bar_int = %d\n", bar_int);
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printf("baz_flag = %s\n", baz_string);
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arg_printusage (args, 5, argv[0], "nothing here");
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}
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#endif
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