1: /* $OpenBSD$ */
2:
3: /*
4: * Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
21: #include <stdlib.h>
22: #include <string.h>
23: #include <unistd.h>
24:
25: #include "tmux.h"
26:
27: /*
28: * Manipulate command arguments.
29: */
30:
31: struct args_entry {
32: u_char flag;
33: char *value;
34: RB_ENTRY(args_entry) entry;
35: };
36:
37: static void args_set(struct args *, u_char, const char *);
38: static struct args_entry *args_find(struct args *, u_char);
39:
40: static int args_cmp(struct args_entry *, struct args_entry *);
41: RB_GENERATE_STATIC(args_tree, args_entry, entry, args_cmp);
42:
43: /* Arguments tree comparison function. */
44: static int
45: args_cmp(struct args_entry *a1, struct args_entry *a2)
46: {
47: return (a1->flag - a2->flag);
48: }
49:
50: /* Find a flag in the arguments tree. */
51: static struct args_entry *
52: args_find(struct args *args, u_char ch)
53: {
54: struct args_entry entry;
55:
56: entry.flag = ch;
57: return (RB_FIND(args_tree, &args->tree, &entry));
58: }
59:
60: /* Parse an argv and argc into a new argument set. */
61: struct args *
62: args_parse(const char *template, int argc, char **argv)
63: {
64: struct args *args;
65: int opt;
66:
67: args = xcalloc(1, sizeof *args);
68:
69: optreset = 1;
70: optind = 1;
71:
72: while ((opt = getopt(argc, argv, template)) != -1) {
73: if (opt < 0)
74: continue;
75: if (opt == '?' || strchr(template, opt) == NULL) {
76: args_free(args);
77: return (NULL);
78: }
79: args_set(args, opt, optarg);
80: }
81: argc -= optind;
82: argv += optind;
83:
84: args->argc = argc;
85: args->argv = cmd_copy_argv(argc, argv);
86:
87: return (args);
88: }
89:
90: /* Free an arguments set. */
91: void
92: args_free(struct args *args)
93: {
94: struct args_entry *entry;
95: struct args_entry *entry1;
96:
97: cmd_free_argv(args->argc, args->argv);
98:
99: RB_FOREACH_SAFE(entry, args_tree, &args->tree, entry1) {
100: RB_REMOVE(args_tree, &args->tree, entry);
101: free(entry->value);
102: free(entry);
103: }
104:
105: free(args);
106: }
107:
108: /* Add to string. */
109: static void printflike(3, 4)
110: args_print_add(char **buf, size_t *len, const char *fmt, ...)
111: {
112: va_list ap;
113: char *s;
114: size_t slen;
115:
116: va_start(ap, fmt);
117: slen = xvasprintf(&s, fmt, ap);
118: va_end(ap);
119:
120: *len += slen;
121: *buf = xrealloc(*buf, *len);
122:
123: strlcat(*buf, s, *len);
124: free(s);
125: }
126:
127: /* Print a set of arguments. */
128: char *
129: args_print(struct args *args)
130: {
131: size_t len;
132: char *buf, *escaped;
133: int i, flags;
134: struct args_entry *entry;
135: static const char quoted[] = " #\"';$";
136:
137: len = 1;
138: buf = xcalloc(1, len);
139:
140: /* Process the flags first. */
141: RB_FOREACH(entry, args_tree, &args->tree) {
142: if (entry->value != NULL)
143: continue;
144:
145: if (*buf == '\0')
146: args_print_add(&buf, &len, "-");
147: args_print_add(&buf, &len, "%c", entry->flag);
148: }
149:
150: /* Then the flags with arguments. */
151: RB_FOREACH(entry, args_tree, &args->tree) {
152: if (entry->value == NULL)
153: continue;
154:
155: if (*buf != '\0')
156: args_print_add(&buf, &len, " -%c ", entry->flag);
157: else
158: args_print_add(&buf, &len, "-%c ", entry->flag);
159:
160: flags = VIS_OCTAL|VIS_TAB|VIS_NL;
161: if (entry->value[strcspn(entry->value, quoted)] != '\0')
162: flags |= VIS_DQ;
163: utf8_stravis(&escaped, entry->value, flags);
164: if (flags & VIS_DQ)
165: args_print_add(&buf, &len, "\"%s\"", escaped);
166: else
167: args_print_add(&buf, &len, "%s", escaped);
168: free(escaped);
169: }
170:
171: /* And finally the argument vector. */
172: for (i = 0; i < args->argc; i++) {
173: if (*buf != '\0')
174: args_print_add(&buf, &len, " ");
175:
176: flags = VIS_OCTAL|VIS_TAB|VIS_NL;
177: if (args->argv[i][strcspn(args->argv[i], quoted)] != '\0')
178: flags |= VIS_DQ;
179: utf8_stravis(&escaped, args->argv[i], flags);
180: if (flags & VIS_DQ)
181: args_print_add(&buf, &len, "\"%s\"", escaped);
182: else
183: args_print_add(&buf, &len, "%s", escaped);
184: free(escaped);
185: }
186:
187: return (buf);
188: }
189:
190: /* Return if an argument is present. */
191: int
192: args_has(struct args *args, u_char ch)
193: {
194: return (args_find(args, ch) == NULL ? 0 : 1);
195: }
196:
197: /* Set argument value in the arguments tree. */
198: static void
199: args_set(struct args *args, u_char ch, const char *value)
200: {
201: struct args_entry *entry;
202:
203: /* Replace existing argument. */
204: if ((entry = args_find(args, ch)) != NULL) {
205: free(entry->value);
206: entry->value = NULL;
207: } else {
208: entry = xcalloc(1, sizeof *entry);
209: entry->flag = ch;
210: RB_INSERT(args_tree, &args->tree, entry);
211: }
212:
213: if (value != NULL)
214: entry->value = xstrdup(value);
215: }
216:
217: /* Get argument value. Will be NULL if it isn't present. */
218: const char *
219: args_get(struct args *args, u_char ch)
220: {
221: struct args_entry *entry;
222:
223: if ((entry = args_find(args, ch)) == NULL)
224: return (NULL);
225: return (entry->value);
226: }
227:
228: /* Convert an argument value to a number. */
229: long long
230: args_strtonum(struct args *args, u_char ch, long long minval, long long maxval,
231: char **cause)
232: {
233: const char *errstr;
234: long long ll;
235: struct args_entry *entry;
236:
237: if ((entry = args_find(args, ch)) == NULL) {
238: *cause = xstrdup("missing");
239: return (0);
240: }
241:
242: ll = strtonum(entry->value, minval, maxval, &errstr);
243: if (errstr != NULL) {
244: *cause = xstrdup(errstr);
245: return (0);
246: }
247:
248: *cause = NULL;
249: return (ll);
250: }
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