libyang 3.1.0
libyang is YANG data modelling language parser and toolkit written (and providing API) in C.
Loading...
Searching...
No Matches
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 "compat.h"
24#include "ly_common.h"
25#include "plugins_internal.h" /* LY_TYPE_*_STR */
26
36static LY_ERR lyplg_type_validate_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lysc_type *type, const struct lyd_node *UNUSED(ctx_node), const struct lyd_node *UNUSED(tree), struct lyd_value *storage, struct ly_err_item **err);
37
46static LY_ERR
47decimal64_num2str(int64_t num, struct lysc_type_dec *type, char **str)
48{
49 char *ret;
50
51 /* allocate the value */
52 ret = calloc(1, LY_NUMBER_MAXLEN);
53 LY_CHECK_RET(!ret, LY_EMEM);
54
55 if (num) {
56 int count = sprintf(ret, "%" PRId64 " ", num);
57
58 if (((num > 0) && ((count - 1) <= type->fraction_digits)) || ((count - 2) <= type->fraction_digits)) {
59 /* we have 0. value, print the value with the leading zeros
60 * (one for 0. and also keep the correct with of num according
61 * to fraction-digits value)
62 * for (num < 0) - extra character for '-' sign */
63 count = sprintf(ret, "%0*" PRId64 " ", (num > 0) ? (type->fraction_digits + 1) : (type->fraction_digits + 2), num);
64 }
65 for (uint8_t i = type->fraction_digits, j = 1; i > 0; i--) {
66 if (j && (i > 1) && (ret[count - 2] == '0')) {
67 /* we have trailing zero to skip */
68 ret[count - 1] = '\0';
69 } else {
70 j = 0;
71 ret[count - 1] = ret[count - 2];
72 }
73 count--;
74 }
75 ret[count - 1] = '.';
76 } else {
77 /* zero */
78 sprintf(ret, "0.0");
79 }
80
81 *str = ret;
82 return LY_SUCCESS;
83}
84
85LIBYANG_API_DEF LY_ERR
86lyplg_type_store_decimal64(const struct ly_ctx *ctx, const struct lysc_type *type, const void *value, size_t value_len,
87 uint32_t options, LY_VALUE_FORMAT format, void *UNUSED(prefix_data), uint32_t hints,
88 const struct lysc_node *UNUSED(ctx_node), struct lyd_value *storage, struct lys_glob_unres *UNUSED(unres),
89 struct ly_err_item **err)
90{
91 struct lysc_type_dec *type_dec = (struct lysc_type_dec *)type;
92 LY_ERR ret = LY_SUCCESS;
93 int64_t num;
94 char *canon;
95
96 /* init storage */
97 memset(storage, 0, sizeof *storage);
98 storage->realtype = type;
99
100 if (format == LY_VALUE_LYB) {
101 /* validation */
102 if (value_len != 8) {
103 ret = ly_err_new(err, LY_EVALID, LYVE_DATA, NULL, NULL, "Invalid LYB decimal64 value size %zu (expected 8).",
104 value_len);
105 goto cleanup;
106 }
107
108 /* we have the decimal64 number, in host byte order */
109 memcpy(&num, value, value_len);
110 num = le64toh(num);
111 } else {
112 /* check hints */
113 ret = lyplg_type_check_hints(hints, value, value_len, type->basetype, NULL, err);
114 LY_CHECK_GOTO(ret, cleanup);
115
116 /* parse decimal64 value */
117 ret = lyplg_type_parse_dec64(type_dec->fraction_digits, value, value_len, &num, err);
118 LY_CHECK_GOTO(ret, cleanup);
119 }
120
121 /* store value */
122 storage->dec64 = num;
123
124 /* we need canonical value for the range check */
125 if (format == LY_VALUE_CANON) {
126 /* store canonical value */
127 if (options & LYPLG_TYPE_STORE_DYNAMIC) {
128 ret = lydict_insert_zc(ctx, (char *)value, &storage->_canonical);
129 options &= ~LYPLG_TYPE_STORE_DYNAMIC;
130 LY_CHECK_GOTO(ret, cleanup);
131 } else {
132 ret = lydict_insert(ctx, value, value_len, &storage->_canonical);
133 LY_CHECK_GOTO(ret, cleanup);
134 }
135 } else {
136 /* generate canonical value */
137 ret = decimal64_num2str(num, type_dec, &canon);
138 LY_CHECK_GOTO(ret, cleanup);
139
140 /* store it */
141 ret = lydict_insert_zc(ctx, canon, (const char **)&storage->_canonical);
142 LY_CHECK_GOTO(ret, cleanup);
143 }
144
145 if (!(options & LYPLG_TYPE_STORE_ONLY)) {
146 /* validate value */
147 ret = lyplg_type_validate_decimal64(ctx, type, NULL, NULL, storage, err);
148 LY_CHECK_GOTO(ret, cleanup);
149 }
150
151cleanup:
152 if (options & LYPLG_TYPE_STORE_DYNAMIC) {
153 free((void *)value);
154 }
155
156 if (ret) {
157 lyplg_type_free_simple(ctx, storage);
158 }
159 return ret;
160}
161
165static LY_ERR
166lyplg_type_validate_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lysc_type *type, const struct lyd_node *UNUSED(ctx_node),
167 const struct lyd_node *UNUSED(tree), struct lyd_value *storage, struct ly_err_item **err)
168{
169 LY_ERR ret;
170 struct lysc_type_dec *type_dec = (struct lysc_type_dec *)type;
171 int64_t num;
172
173 LY_CHECK_ARG_RET(NULL, type, storage, err, LY_EINVAL);
174 *err = NULL;
175 num = storage->dec64;
176
177 if (type_dec->range) {
178 /* check range of the number */
179 ret = lyplg_type_validate_range(type->basetype, type_dec->range, num, storage->_canonical,
180 strlen(storage->_canonical), err);
181 LY_CHECK_RET(ret);
182 }
183
184 return LY_SUCCESS;
185}
186
187LIBYANG_API_DEF LY_ERR
188lyplg_type_compare_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lyd_value *val1,
189 const struct lyd_value *val2)
190{
191 /* if type is the same, the fraction digits are, too */
192 if (val1->dec64 != val2->dec64) {
193 return LY_ENOT;
194 }
195 return LY_SUCCESS;
196}
197
198LIBYANG_API_DEF int
199lyplg_type_sort_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lyd_value *val1, const struct lyd_value *val2)
200{
201 if (val1->dec64 > val2->dec64) {
202 return 1;
203 } else if (val1->dec64 < val2->dec64) {
204 return -1;
205 } else {
206 return 0;
207 }
208}
209
210LIBYANG_API_DEF const void *
211lyplg_type_print_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lyd_value *value, LY_VALUE_FORMAT format,
212 void *UNUSED(prefix_data), ly_bool *dynamic, size_t *value_len)
213{
214 int64_t num = 0;
215 void *buf;
216
217 if (format == LY_VALUE_LYB) {
218 num = htole64(value->dec64);
219 if (num == value->dec64) {
220 /* values are equal, little-endian */
221 *dynamic = 0;
222 if (value_len) {
223 *value_len = sizeof value->dec64;
224 }
225 return &value->dec64;
226 } else {
227 /* values differ, big-endian */
228 buf = calloc(1, sizeof value->dec64);
229 LY_CHECK_RET(!buf, NULL);
230
231 *dynamic = 1;
232 if (value_len) {
233 *value_len = sizeof value->dec64;
234 }
235 memcpy(buf, &num, sizeof value->dec64);
236 return buf;
237 }
238 }
239
240 /* use the cached canonical value */
241 if (dynamic) {
242 *dynamic = 0;
243 }
244 if (value_len) {
245 *value_len = strlen(value->_canonical);
246 }
247 return value->_canonical;
248}
249
258 {
259 .module = "",
260 .revision = NULL,
261 .name = LY_TYPE_DEC64_STR,
262
263 .plugin.id = "libyang 2 - decimal64, version 1",
264 .plugin.store = lyplg_type_store_decimal64,
265 .plugin.validate = lyplg_type_validate_decimal64,
266 .plugin.compare = lyplg_type_compare_decimal64,
267 .plugin.sort = lyplg_type_sort_decimal64,
268 .plugin.print = lyplg_type_print_decimal64,
269 .plugin.duplicate = lyplg_type_dup_simple,
270 .plugin.free = lyplg_type_free_simple,
271 .plugin.lyb_data_len = 8,
272 },
273 {0}
274};
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:211
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:86
const struct lyplg_type_record plugins_decimal64[]
Plugin information for decimal64 type implementation.
Definition decimal64.c:257
LIBYANG_API_DEF int lyplg_type_sort_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lyd_value *val1, const struct lyd_value *val2)
Definition decimal64.c:199
LIBYANG_API_DEF LY_ERR lyplg_type_compare_decimal64(const struct ly_ctx *UNUSED(ctx), const struct lyd_value *val1, const struct lyd_value *val2)
Definition decimal64.c:188
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:237
@ LYVE_DATA
Definition log.h:274
@ LY_EINVAL
Definition log.h:241
@ LY_EMEM
Definition log.h:239
@ LY_ENOT
Definition log.h:251
@ LY_EVALID
Definition log.h:245
@ LY_SUCCESS
Definition log.h:238
Libyang full error structure.
Definition log.h:282
const char *const char * revision
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 ly_err_new(struct ly_err_item **err, LY_ERR ecode, LY_VECODE vecode, char *data_path, char *apptag, const char *err_format,...) _FORMAT_PRINTF(6
Create and fill error structure.
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
#define LYPLG_TYPE_STORE_ONLY
struct lysc_range * range
LY_DATA_TYPE basetype
uint8_t fraction_digits
Compiled YANG data node.
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:35
API for (user) types plugins.
const struct lysc_type * realtype
Definition tree_data.h:575
const char * _canonical
Definition tree_data.h:572
Generic structure for a data node.
Definition tree_data.h:799
YANG data representation.
Definition tree_data.h:571