Annotation of embedaddon/mpd/src/contrib/libpdel/structs/type/structs_type_string.c, revision 1.1.1.1
1.1 misho 1:
2: /*
3: * Copyright (c) 2001-2002 Packet Design, LLC.
4: * All rights reserved.
5: *
6: * Subject to the following obligations and disclaimer of warranty,
7: * use and redistribution of this software, in source or object code
8: * forms, with or without modifications are expressly permitted by
9: * Packet Design; provided, however, that:
10: *
11: * (i) Any and all reproductions of the source or object code
12: * must include the copyright notice above and the following
13: * disclaimer of warranties; and
14: * (ii) No rights are granted, in any manner or form, to use
15: * Packet Design trademarks, including the mark "PACKET DESIGN"
16: * on advertising, endorsements, or otherwise except as such
17: * appears in the above copyright notice or in the software.
18: *
19: * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
20: * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
21: * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
22: * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
23: * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
24: * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
25: * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
26: * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
27: * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
28: * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
29: * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
30: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
31: * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
32: * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
33: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
35: * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
36: * THE POSSIBILITY OF SUCH DAMAGE.
37: *
38: * Author: Archie Cobbs <archie@freebsd.org>
39: */
40:
41: #include <sys/types.h>
42:
43: #include <stdlib.h>
44: #include <stdio.h>
45: #include <stdarg.h>
46: #include <string.h>
47: #include <errno.h>
48:
49: #include "structs/structs.h"
50: #include "structs/type/array.h"
51: #include "structs/type/string.h"
52: #include "util/typed_mem.h"
53:
54: /*********************************************************************
55: DYNAMICALLY ALLOCATED STRING TYPE
56: *********************************************************************/
57:
58: int
59: structs_string_init(const struct structs_type *type, void *data)
60: {
61: return (structs_string_binify(type, "", data, NULL, 0));
62: }
63:
64: int
65: structs_string_equal(const struct structs_type *type,
66: const void *v1, const void *v2)
67: {
68: const int as_null = type->args[1].i;
69: const char *const s1 = *((const char **)v1);
70: const char *const s2 = *((const char **)v2);
71: int empty1;
72: int empty2;
73:
74: if (!as_null)
75: return (strcmp(s1, s2) == 0);
76: empty1 = (s1 == NULL) || *s1 == '\0';
77: empty2 = (s2 == NULL) || *s2 == '\0';
78: if (empty1 ^ empty2)
79: return (0);
80: if (empty1)
81: return (1);
82: return (strcmp(s1, s2) == 0);
83: }
84:
85: char *
86: structs_string_ascify(const struct structs_type *type,
87: const char *mtype, const void *data)
88: {
89: const int as_null = type->args[1].i;
90: const char *s = *((char **)data);
91:
92: if (as_null && s == NULL)
93: s = "";
94: return (STRDUP(mtype, s));
95: }
96:
97: int
98: structs_string_binify(const struct structs_type *type,
99: const char *ascii, void *data, char *ebuf, size_t emax)
100: {
101: const char *mtype = type->args[0].s;
102: const int as_null = type->args[1].i;
103: char *s;
104:
105: if (as_null && *ascii == '\0')
106: s = NULL;
107: else if ((s = STRDUP(mtype, ascii)) == NULL)
108: return (-1);
109: *((char **)data) = s;
110: return (0);
111: }
112:
113: /*
114: * This can be used by any type that wishes to encode its
115: * value using its ASCII string representation.
116: */
117: int
118: structs_string_encode(const struct structs_type *type, const char *mtype,
119: struct structs_data *code, const void *data)
120: {
121: if ((code->data = structs_get_string(type,
122: NULL, data, mtype)) == NULL)
123: return (-1);
124: code->length = strlen((char *)code->data) + 1;
125: return (0);
126: }
127:
128: /*
129: * This can be used by any type that wishes to encode its
130: * value using its ASCII string representation.
131: */
132: int
133: structs_string_decode(const struct structs_type *type,
134: const u_char *code, size_t cmax, void *data, char *ebuf, size_t emax)
135: {
136: size_t slen;
137:
138: /* Determine length of string */
139: for (slen = 0; slen < cmax && ((char *)code)[slen] != '\0'; slen++);
140: if (slen == cmax) {
141: strlcpy(ebuf, "encoded string is truncated", emax);
142: errno = EINVAL;
143: return (-1);
144: }
145:
146: /* Set string value */
147: if ((*type->binify)(type, (const char *)code, data, ebuf, emax) == -1)
148: return (-1);
149:
150: /* Done */
151: return (slen + 1);
152: }
153:
154: void
155: structs_string_free(const struct structs_type *type, void *data)
156: {
157: const char *mtype = type->args[0].s;
158: char *const s = *((char **)data);
159:
160: if (s != NULL) {
161: FREE(mtype, s);
162: *((char **)data) = NULL;
163: }
164: }
165:
166: const struct structs_type structs_type_string
167: = STRUCTS_STRING_TYPE(STRUCTS_TYPE_STRING_MTYPE, 0);
168: const struct structs_type structs_type_string_null
169: = STRUCTS_STRING_TYPE(STRUCTS_TYPE_STRING_MTYPE, 1);
170:
171: /*********************************************************************
172: BOUNDED LENGTH STRING TYPE
173: *********************************************************************/
174:
175: int
176: structs_bstring_equal(const struct structs_type *type,
177: const void *v1, const void *v2)
178: {
179: const char *const s1 = v1;
180: const char *const s2 = v2;
181:
182: return (strcmp(s1, s2) == 0);
183: }
184:
185: char *
186: structs_bstring_ascify(const struct structs_type *type,
187: const char *mtype, const void *data)
188: {
189: const char *const s = data;
190:
191: return (STRDUP(mtype, s));
192: }
193:
194: int
195: structs_bstring_binify(const struct structs_type *type,
196: const char *ascii, void *data, char *ebuf, size_t emax)
197: {
198: const size_t alen = strlen(ascii);
199:
200: if (alen + 1 > type->size) {
201: strlcpy(ebuf,
202: "string is too long for bounded length buffer", emax);
203: return (-1);
204: }
205: memcpy(data, ascii, alen + 1);
206: return (0);
207: }
208:
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