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1 office 1 /**
2 * @file to_string.c
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * @section DESCRIPTION
30 *
31 * Synopsis:
32 * to_string(value)
33 * Variables:
34 * string (empty) - value, converted to string
35 */
36  
37 #include <stdlib.h>
38 #include <string.h>
39  
40 #include <ncd/NCDValGenerator.h>
41  
42 #include <ncd/module_common.h>
43  
44 #include <generated/blog_channel_ncd_to_string.h>
45  
46 struct instance {
47 NCDModuleInst *i;
48 char *str;
49 };
50  
51 static void func_new (void *vo, NCDModuleInst *i, const struct NCDModuleInst_new_params *params)
52 {
53 struct instance *o = vo;
54 o->i = i;
55  
56 // read arguments
57 NCDValRef value_arg;
58 if (!NCDVal_ListRead(params->args, 1, &value_arg)) {
59 ModuleLog(i, BLOG_ERROR, "wrong arity");
60 goto fail0;
61 }
62  
63 // convert to string
64 if (!(o->str = NCDValGenerator_Generate(value_arg))) {
65 ModuleLog(i, BLOG_ERROR, "NCDValGenerator_Generate failed");
66 goto fail0;
67 }
68  
69 // signal up
70 NCDModuleInst_Backend_Up(i);
71 return;
72  
73 fail0:
74 NCDModuleInst_Backend_DeadError(i);
75 }
76  
77 static void func_die (void *vo)
78 {
79 struct instance *o = vo;
80  
81 // free string
82 free(o->str);
83  
84 NCDModuleInst_Backend_Dead(o->i);
85 }
86  
87 static int func_getvar2 (void *vo, NCD_string_id_t name, NCDValMem *mem, NCDValRef *out)
88 {
89 struct instance *o = vo;
90  
91 if (name == NCD_STRING_EMPTY) {
92 *out = NCDVal_NewString(mem, o->str);
93 return 1;
94 }
95  
96 return 0;
97 }
98  
99 static struct NCDModule modules[] = {
100 {
101 .type = "to_string",
102 .func_new2 = func_new,
103 .func_die = func_die,
104 .func_getvar2 = func_getvar2,
105 .alloc_size = sizeof(struct instance)
106 }, {
107 .type = NULL
108 }
109 };
110  
111 const struct NCDModuleGroup ncdmodule_to_string = {
112 .modules = modules
113 };