libyang 2.1.55
libyang is YANG data modelling language parser and toolkit written (and providing API) in C.
decimal64.c
Go to the documentation of this file.
1
15#include "plugins_types.h"
16
17#include <stdint.h>
18#include <stdlib.h>
19
20#include "libyang.h"
21
22/* additional internal headers for some useful simple macros */
23#include "common.h"
24#include "compat.h"
25#include "plugins_internal.h" /* LY_TYPE_*_STR */
26
44static LY_ERR
45decimal64_num2str(int64_t num, struct lysc_type_dec *type, char **str)
46{
47 char *ret;
48
49 /* allocate the value */
50 ret = calloc(1, LY_NUMBER_MAXLEN);
51 LY_CHECK_RET(!ret, LY_EMEM);
52
53 if (num) {
54 int count = sprintf(ret, "%" PRId64 " ", num);
55
56 if (((num > 0) && ((count - 1) <= type->fraction_digits)) || ((count - 2) <= type->fraction_digits)) {
57 /* we have 0. value, print the value with the leading zeros
58 * (one for 0. and also keep the correct with of num according
59 * to fraction-digits value)
60 * for (num < 0) - extra character for '-' sign */
61 count = sprintf(ret, "%0*" PRId64 " ", (num > 0) ? (type->fraction_digits + 1) : (type->fraction_digits + 2), num);
62 }
63 for (uint8_t i = type->fraction_digits, j = 1; i > 0; i--) {
64 if (j && (i > 1) && (ret[count - 2] == '0')) {
65 /* we have trailing zero to skip */
66 ret[count - 1] = '\0';
67 } else {
68 j = 0;
69 ret[count - 1] = ret[count - 2];
70 }
71 count--;
72 }
73 ret[count - 1] = '.';
74 } else {
75 /* zero */
76 sprintf(ret, "0.0");
77 }
78
79 *str = ret;
80 return LY_SUCCESS;
81}
82
83LIBYANG_API_DEF LY_ERR
84lyplg_type_store_decimal64(const struct ly_ctx *ctx, const struct lysc_type *type, const void *value, size_t value_len,
85 uint32_t options, LY_VALUE_FORMAT format, void *UNUSED(prefix_data), uint32_t hints,
86 const struct lysc_node *UNUSED(ctx_node), struct lyd_value *storage, struct lys_glob_unres *UNUSED(unres),
87 struct ly_err_item **err)
88{
89 struct lysc_type_dec *type_dec = (struct lysc_type_dec *)type;
90 LY_ERR ret = LY_SUCCESS;
91 int64_t num;
92 char *canon;
93
94 /* init storage */
95 memset(storage, 0, sizeof *storage);
96 storage->realtype = type;
97
98 if (format == LY_VALUE_LYB) {
99 /* validation */
100 if (value_len != 8) {
101 ret = ly_err_new(err, LY_EVALID, LYVE_DATA, NULL, NULL, "Invalid LYB decimal64 value size %zu (expected 8).",
102 value_len);
103 goto cleanup;
104 }
105
106 /* we have the decimal64 number, in host byte order */
107 memcpy(&num, value, value_len);
108 num = le64toh(num);
109 } else {
110 /* check hints */
111 ret = lyplg_type_check_hints(hints, value, value_len, type->basetype, NULL, err);
112 LY_CHECK_GOTO(ret, cleanup);
113
114 /* parse decimal64 value */
115 ret = lyplg_type_parse_dec64(type_dec->fraction_digits, value, value_len, &num, err);
116 LY_CHECK_GOTO(ret, cleanup);
117 }
118
119 /* store value */
120 storage->dec64 = num;
121
122 /* we need canonical value for the range check */
123 if (format == LY_VALUE_CANON) {
124 /* store canonical value */
125 if (options & LYPLG_TYPE_STORE_DYNAMIC) {
126 ret = lydict_insert_zc(ctx, (char *)value, &storage->_canonical);
127 options &= ~LYPLG_TYPE_STORE_DYNAMIC;
128 LY_CHECK_GOTO(ret, cleanup);
129 } else {
130 ret = lydict_insert(ctx, value, value_len, &storage->_canonical);
131 LY_CHECK_GOTO(ret, cleanup);
132 }
133 } else {
134 /* generate canonical value */
135 ret = decimal64_num2str(num, type_dec, &canon);
136 LY_CHECK_GOTO(ret, cleanup);
137
138 /* store it */
139 ret = lydict_insert_zc(ctx, canon, (const char **)&storage->_canonical);
140 LY_CHECK_GOTO(ret, cleanup);
141 }
142
143 if (type_dec->range) {
144 /* check range of the number */
145 ret = lyplg_type_validate_range(type->basetype, type_dec->range, num, storage->_canonical,
146 strlen(storage->_canonical), err);
147 LY_CHECK_GOTO(ret, cleanup);
148 }
149
150cleanup:
151 if (options & LYPLG_TYPE_STORE_DYNAMIC) {
152 free((void *)value);
153 }
154
155 if (ret) {
156 lyplg_type_free_simple(ctx, storage);
157 }
158 return ret;
159}
160
161LIBYANG_API_DEF LY_ERR
162lyplg_type_compare_decimal64(const struct lyd_value *val1, const struct lyd_value *val2)
163{
164 if (val1->realtype != val2->realtype) {
165 return LY_ENOT;
166 }
167
168 /* if type is the same, the fraction digits are, too */
169 if (val1->dec64 != val2->dec64) {
170 return LY_ENOT;
171 }
172 return LY_SUCCESS;
173}
174
175LIBYANG_API_DEF const void *
176lyplg_type_print_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lyd_value *value, LY_VALUE_FORMAT format,
177 void *UNUSED(prefix_data), ly_bool *dynamic, size_t *value_len)
178{
179 int64_t num = 0;
180 void *buf;
181
182 if (format == LY_VALUE_LYB) {
183 num = htole64(value->dec64);
184 if (num == value->dec64) {
185 /* values are equal, little-endian */
186 *dynamic = 0;
187 if (value_len) {
188 *value_len = sizeof value->dec64;
189 }
190 return &value->dec64;
191 } else {
192 /* values differ, big-endian */
193 buf = calloc(1, sizeof value->dec64);
194 LY_CHECK_RET(!buf, NULL);
195
196 *dynamic = 1;
197 if (value_len) {
198 *value_len = sizeof value->dec64;
199 }
200 memcpy(buf, &num, sizeof value->dec64);
201 return buf;
202 }
203 }
204
205 /* use the cached canonical value */
206 if (dynamic) {
207 *dynamic = 0;
208 }
209 if (value_len) {
210 *value_len = strlen(value->_canonical);
211 }
212 return value->_canonical;
213}
214
223 {
224 .module = "",
225 .revision = NULL,
226 .name = LY_TYPE_DEC64_STR,
227
228 .plugin.id = "libyang 2 - decimal64, version 1",
229 .plugin.store = lyplg_type_store_decimal64,
230 .plugin.validate = NULL,
231 .plugin.compare = lyplg_type_compare_decimal64,
232 .plugin.sort = NULL,
233 .plugin.print = lyplg_type_print_decimal64,
234 .plugin.duplicate = lyplg_type_dup_simple,
235 .plugin.free = lyplg_type_free_simple,
236 .plugin.lyb_data_len = 8,
237 },
238 {0}
239};
LIBYANG_API_DEF const void * lyplg_type_print_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lyd_value *value, LY_VALUE_FORMAT format, void *UNUSED(prefix_data), ly_bool *dynamic, size_t *value_len)
Definition: decimal64.c:176
LIBYANG_API_DEF LY_ERR lyplg_type_store_decimal64(const struct ly_ctx *ctx, const struct lysc_type *type, const void *value, size_t value_len, uint32_t options, LY_VALUE_FORMAT format, void *UNUSED(prefix_data), uint32_t hints, const struct lysc_node *UNUSED(ctx_node), struct lyd_value *storage, struct lys_glob_unres *UNUSED(unres), struct ly_err_item **err)
Definition: decimal64.c:84
const struct lyplg_type_record plugins_decimal64[]
Plugin information for decimal64 type implementation.
Definition: decimal64.c:222
libyang context handler.
LIBYANG_API_DECL LY_ERR lydict_insert(const struct ly_ctx *ctx, const char *value, size_t len, const char **str_p)
Insert string into dictionary. If the string is already present, only a reference counter is incremen...
LIBYANG_API_DECL LY_ERR lydict_insert_zc(const struct ly_ctx *ctx, char *value, const char **str_p)
Insert string into dictionary - zerocopy version. If the string is already present,...
LY_ERR
libyang's error codes returned by the libyang functions.
Definition: log.h:251
@ LYVE_DATA
Definition: log.h:288
@ LY_EMEM
Definition: log.h:253
@ LY_ENOT
Definition: log.h:265
@ LY_EVALID
Definition: log.h:259
@ LY_SUCCESS
Definition: log.h:252
Libyang full error structure.
Definition: log.h:296
LIBYANG_API_DEF LY_ERR lyplg_type_compare_decimal64(const struct lyd_value *val1, const struct lyd_value *val2)
Implementation of lyplg_type_compare_clb for the built-in decimal64 type.
Definition: decimal64.c:162
const char * module
LIBYANG_API_DECL LY_ERR ly_err_new(struct ly_err_item **err, LY_ERR ecode, LY_VECODE vecode, char *path, char *apptag, const char *err_format,...) _FORMAT_PRINTF(6
Create and fill error structure.
LIBYANG_API_DECL LY_ERR lyplg_type_validate_range(LY_DATA_TYPE basetype, struct lysc_range *range, int64_t value, const char *strval, size_t strval_len, struct ly_err_item **err)
Data type validator for a range/length-restricted values.
LIBYANG_API_DECL LY_ERR lyplg_type_check_hints(uint32_t hints, const char *value, size_t value_len, LY_DATA_TYPE type, int *base, struct ly_err_item **err)
Check that the type is suitable for the parser's hints (if any) in the specified format.
LIBYANG_API_DECL LY_ERR lyplg_type_parse_dec64(uint8_t fraction_digits, const char *value, size_t value_len, int64_t *ret, struct ly_err_item **err)
Convert a string with a decimal64 value into libyang representation: ret = value * 10^fraction-digits...
LIBYANG_API_DECL LY_ERR lyplg_type_dup_simple(const struct ly_ctx *ctx, const struct lyd_value *original, struct lyd_value *dup)
Implementation of lyplg_type_dup_clb for a generic simple type.
LIBYANG_API_DECL void lyplg_type_free_simple(const struct ly_ctx *ctx, struct lyd_value *value)
Implementation of lyplg_type_free_clb for a generic simple type.
#define LYPLG_TYPE_STORE_DYNAMIC
struct lysc_range * range
Definition: tree_schema.h:1302
LY_DATA_TYPE basetype
Definition: tree_schema.h:1283
uint8_t fraction_digits
Definition: tree_schema.h:1301
Compiled YANG data node.
Definition: tree_schema.h:1398
LY_VALUE_FORMAT
All kinds of supported value formats and prefix mappings to modules.
Definition: tree.h:234
@ LY_VALUE_CANON
Definition: tree.h:235
@ LY_VALUE_LYB
Definition: tree.h:240
The main libyang public header.
uint8_t ly_bool
Type to indicate boolean value.
Definition: log.h:28
API for (user) types plugins.
const struct lysc_type * realtype
Definition: tree_data.h:564
const char * _canonical
Definition: tree_data.h:561
YANG data representation.
Definition: tree_data.h:560