Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 1 | /** |
| 2 | * @file path.c |
| 3 | * @author Michal Vasko <mvasko@cesnet.cz> |
| 4 | * @brief Path functions |
| 5 | * |
| 6 | * Copyright (c) 2020 CESNET, z.s.p.o. |
| 7 | * |
| 8 | * This source code is licensed under BSD 3-Clause License (the "License"). |
| 9 | * You may not use this file except in compliance with the License. |
| 10 | * You may obtain a copy of the License at |
| 11 | * |
| 12 | * https://opensource.org/licenses/BSD-3-Clause |
| 13 | */ |
| 14 | #define _ISOC99_SOURCE /* strtoull */ |
| 15 | |
| 16 | #include "path.h" |
| 17 | |
| 18 | #include <assert.h> |
| 19 | #include <ctype.h> |
| 20 | #include <stdlib.h> |
Radek Krejci | ad97c5f | 2020-06-30 09:19:28 +0200 | [diff] [blame] | 21 | #include <string.h> |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 22 | |
| 23 | #include "common.h" |
Michal Vasko | 5aa44c0 | 2020-06-29 11:47:02 +0200 | [diff] [blame] | 24 | #include "compat.h" |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 25 | #include "log.h" |
| 26 | #include "plugins_types.h" |
Radek Krejci | ad97c5f | 2020-06-30 09:19:28 +0200 | [diff] [blame] | 27 | #include "set.h" |
Michal Vasko | 4c583e8 | 2020-07-17 12:16:14 +0200 | [diff] [blame] | 28 | #include "tree.h" |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 29 | #include "tree_data_internal.h" |
Radek Krejci | ad97c5f | 2020-06-30 09:19:28 +0200 | [diff] [blame] | 30 | #include "tree_schema.h" |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 31 | #include "tree_schema_internal.h" |
| 32 | #include "xpath.h" |
| 33 | |
Radek Krejci | c0c6641 | 2020-08-21 13:53:50 +0200 | [diff] [blame] | 34 | #define LOGVAL_P(CTX, CUR_NODE, CODE, ...) ly_vlog(CTX, (CUR_NODE) ? LY_VLOG_LYSC : LY_VLOG_NONE, CUR_NODE, CODE, ##__VA_ARGS__) |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 35 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 36 | /** |
| 37 | * @brief Check predicate syntax. |
| 38 | * |
| 39 | * @param[in] ctx libyang context. |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 40 | * @param[in] cur_node Current (original context) node. |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 41 | * @param[in] exp Parsed predicate. |
| 42 | * @param[in,out] tok_idx Index in @p exp, is adjusted. |
| 43 | * @param[in] prefix Prefix option. |
| 44 | * @param[in] pred Predicate option. |
| 45 | * @return LY_ERR value. |
| 46 | */ |
| 47 | static LY_ERR |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 48 | ly_path_check_predicate(const struct ly_ctx *ctx, const struct lysc_node *cur_node, const struct lyxp_expr *exp, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 49 | uint16_t *tok_idx, uint8_t prefix, uint8_t pred) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 50 | { |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 51 | LY_ERR ret = LY_SUCCESS; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 52 | struct ly_set *set = NULL; |
| 53 | uint32_t i; |
| 54 | const char *name; |
| 55 | size_t name_len; |
| 56 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 57 | if (!lyxp_next_token(NULL, exp, tok_idx, LYXP_TOKEN_BRACK1)) { |
Radek Krejci | f6a1100 | 2020-08-21 13:29:07 +0200 | [diff] [blame] | 58 | /* '[' */ |
| 59 | |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 60 | if (((pred == LY_PATH_PRED_SIMPLE) || (pred == LY_PATH_PRED_KEYS)) && |
| 61 | !lyxp_check_token(NULL, exp, *tok_idx, LYXP_TOKEN_NAMETEST)) { |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 62 | ret = ly_set_new(&set); |
| 63 | LY_CHECK_GOTO(ret, cleanup); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 64 | |
| 65 | do { |
| 66 | /* NameTest is always expected here */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 67 | LY_CHECK_GOTO(lyxp_check_token(ctx, exp, *tok_idx, LYXP_TOKEN_NAMETEST), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 68 | |
| 69 | /* check prefix based on the options */ |
| 70 | name = strnstr(exp->expr + exp->tok_pos[*tok_idx], ":", exp->tok_len[*tok_idx]); |
| 71 | if ((prefix == LY_PATH_PREFIX_MANDATORY) && !name) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 72 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Prefix missing for \"%.*s\" in path.", exp->tok_len[*tok_idx], |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 73 | exp->expr + exp->tok_pos[*tok_idx]); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 74 | goto token_error; |
Michal Vasko | 8b06a5e | 2020-08-06 12:13:08 +0200 | [diff] [blame] | 75 | } else if ((prefix == LY_PATH_PREFIX_STRICT_INHERIT) && name) { |
| 76 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Redundant prefix for \"%.*s\" in path.", exp->tok_len[*tok_idx], |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 77 | exp->expr + exp->tok_pos[*tok_idx]); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 78 | goto token_error; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 79 | } |
| 80 | if (!name) { |
| 81 | name = exp->expr + exp->tok_pos[*tok_idx]; |
| 82 | name_len = exp->tok_len[*tok_idx]; |
| 83 | } else { |
| 84 | ++name; |
| 85 | name_len = exp->tok_len[*tok_idx] - (name - (exp->expr + exp->tok_pos[*tok_idx])); |
| 86 | } |
| 87 | |
| 88 | /* check whether it was not already specified */ |
| 89 | for (i = 0; i < set->count; ++i) { |
| 90 | /* all the keys must be from the same module so this comparison should be fine */ |
| 91 | if (!strncmp(set->objs[i], name, name_len) && !isalpha(((char *)set->objs[i])[name_len])) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 92 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Duplicate predicate key \"%.*s\" in path.", name_len, name); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 93 | goto token_error; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 94 | } |
| 95 | } |
| 96 | |
| 97 | /* add it into the set */ |
Radek Krejci | 3d92e44 | 2020-10-12 12:48:13 +0200 | [diff] [blame] | 98 | ret = ly_set_add(set, (void *)name, 1, NULL); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 99 | LY_CHECK_GOTO(ret, cleanup); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 100 | |
| 101 | /* NameTest */ |
| 102 | ++(*tok_idx); |
| 103 | |
| 104 | /* '=' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 105 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_OPER_EQUAL), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 106 | |
| 107 | /* Literal */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 108 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_LITERAL), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 109 | |
| 110 | /* ']' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 111 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_BRACK2), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 112 | |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 113 | /* '[' */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 114 | } while (!lyxp_next_token(NULL, exp, tok_idx, LYXP_TOKEN_BRACK1)); |
| 115 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 116 | } else if ((pred == LY_PATH_PRED_SIMPLE) && !lyxp_next_token(NULL, exp, tok_idx, LYXP_TOKEN_DOT)) { |
Radek Krejci | f6a1100 | 2020-08-21 13:29:07 +0200 | [diff] [blame] | 117 | /* '.' */ |
| 118 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 119 | /* '=' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 120 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_OPER_EQUAL), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 121 | |
| 122 | /* Literal */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 123 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_LITERAL), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 124 | |
| 125 | /* ']' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 126 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_BRACK2), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 127 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 128 | } else if ((pred == LY_PATH_PRED_SIMPLE) && !lyxp_next_token(NULL, exp, tok_idx, LYXP_TOKEN_NUMBER)) { |
Radek Krejci | f6a1100 | 2020-08-21 13:29:07 +0200 | [diff] [blame] | 129 | /* Number */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 130 | |
| 131 | /* ']' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 132 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_BRACK2), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 133 | |
| 134 | } else if ((pred == LY_PATH_PRED_LEAFREF) && !lyxp_check_token(NULL, exp, *tok_idx, LYXP_TOKEN_NAMETEST)) { |
| 135 | assert(prefix == LY_PATH_PREFIX_OPTIONAL); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 136 | ret = ly_set_new(&set); |
| 137 | LY_CHECK_GOTO(ret, cleanup); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 138 | |
| 139 | do { |
| 140 | /* NameTest is always expected here */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 141 | LY_CHECK_GOTO(lyxp_check_token(ctx, exp, *tok_idx, LYXP_TOKEN_NAMETEST), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 142 | |
| 143 | name = strnstr(exp->expr + exp->tok_pos[*tok_idx], ":", exp->tok_len[*tok_idx]); |
| 144 | if (!name) { |
| 145 | name = exp->expr + exp->tok_pos[*tok_idx]; |
| 146 | name_len = exp->tok_len[*tok_idx]; |
| 147 | } else { |
| 148 | ++name; |
| 149 | name_len = exp->tok_len[*tok_idx] - (name - (exp->expr + exp->tok_pos[*tok_idx])); |
| 150 | } |
| 151 | |
| 152 | /* check whether it was not already specified */ |
| 153 | for (i = 0; i < set->count; ++i) { |
| 154 | /* all the keys must be from the same module so this comparison should be fine */ |
| 155 | if (!strncmp(set->objs[i], name, name_len) && !isalpha(((char *)set->objs[i])[name_len])) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 156 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Duplicate predicate key \"%.*s\" in path.", name_len, name); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 157 | goto token_error; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | |
| 161 | /* add it into the set */ |
Radek Krejci | 3d92e44 | 2020-10-12 12:48:13 +0200 | [diff] [blame] | 162 | ret = ly_set_add(set, (void *)name, 1, NULL); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 163 | LY_CHECK_GOTO(ret, cleanup); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 164 | |
| 165 | /* NameTest */ |
| 166 | ++(*tok_idx); |
| 167 | |
| 168 | /* '=' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 169 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_OPER_EQUAL), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 170 | |
| 171 | /* FuncName */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 172 | LY_CHECK_GOTO(lyxp_check_token(ctx, exp, *tok_idx, LYXP_TOKEN_FUNCNAME), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 173 | if ((exp->tok_len[*tok_idx] != 7) || strncmp(exp->expr + exp->tok_pos[*tok_idx], "current", 7)) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 174 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Invalid function \"%.*s\" invocation in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 175 | exp->tok_len[*tok_idx], exp->expr + exp->tok_pos[*tok_idx]); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 176 | goto token_error; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 177 | } |
| 178 | ++(*tok_idx); |
| 179 | |
| 180 | /* '(' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 181 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_PAR1), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 182 | |
| 183 | /* ')' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 184 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_PAR2), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 185 | |
| 186 | /* '/' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 187 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_OPER_PATH), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 188 | |
| 189 | /* '..' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 190 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_DDOT), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 191 | do { |
| 192 | /* '/' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 193 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_OPER_PATH), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 194 | } while (!lyxp_next_token(NULL, exp, tok_idx, LYXP_TOKEN_DDOT)); |
| 195 | |
| 196 | /* NameTest */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 197 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_NAMETEST), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 198 | |
| 199 | /* '/' */ |
| 200 | while (!lyxp_next_token(NULL, exp, tok_idx, LYXP_TOKEN_OPER_PATH)) { |
| 201 | /* NameTest */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 202 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_NAMETEST), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | /* ']' */ |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 206 | LY_CHECK_GOTO(lyxp_next_token(ctx, exp, tok_idx, LYXP_TOKEN_BRACK2), token_error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 207 | |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 208 | /* '[' */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 209 | } while (!lyxp_next_token(NULL, exp, tok_idx, LYXP_TOKEN_BRACK1)); |
| 210 | |
| 211 | } else { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 212 | LOGVAL_P(ctx, cur_node, LY_VCODE_XP_INTOK, lyxp_print_token(exp->tokens[*tok_idx]), |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 213 | exp->expr + exp->tok_pos[*tok_idx]); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 214 | goto token_error; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 215 | } |
| 216 | } |
| 217 | |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 218 | cleanup: |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 219 | ly_set_free(set, NULL); |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 220 | return ret; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 221 | |
Radek Krejci | ba03a5a | 2020-08-27 14:40:41 +0200 | [diff] [blame] | 222 | token_error: |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 223 | ly_set_free(set, NULL); |
| 224 | return LY_EVALID; |
| 225 | } |
| 226 | |
| 227 | LY_ERR |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 228 | ly_path_parse(const struct ly_ctx *ctx, const struct lysc_node *ctx_node, const char *str_path, size_t path_len, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 229 | uint8_t begin, uint8_t lref, uint8_t prefix, uint8_t pred, struct lyxp_expr **expr) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 230 | { |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 231 | LY_ERR ret = LY_SUCCESS; |
| 232 | struct lyxp_expr *exp = NULL; |
Michal Vasko | 8b06a5e | 2020-08-06 12:13:08 +0200 | [diff] [blame] | 233 | uint16_t tok_idx, cur_len; |
| 234 | const char *cur_node, *prev_prefix = NULL, *ptr; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 235 | |
| 236 | assert((begin == LY_PATH_BEGIN_ABSOLUTE) || (begin == LY_PATH_BEGIN_EITHER)); |
| 237 | assert((lref == LY_PATH_LREF_TRUE) || (lref == LY_PATH_LREF_FALSE)); |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 238 | assert((prefix == LY_PATH_PREFIX_OPTIONAL) || (prefix == LY_PATH_PREFIX_MANDATORY) || |
| 239 | (prefix == LY_PATH_PREFIX_STRICT_INHERIT)); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 240 | assert((pred == LY_PATH_PRED_KEYS) || (pred == LY_PATH_PRED_SIMPLE) || (pred == LY_PATH_PRED_LEAFREF)); |
| 241 | |
| 242 | /* parse as a generic XPath expression */ |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 243 | LY_CHECK_GOTO(ret = lyxp_expr_parse(ctx, str_path, path_len, 1, &exp), error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 244 | tok_idx = 0; |
| 245 | |
| 246 | if (begin == LY_PATH_BEGIN_EITHER) { |
| 247 | /* is the path relative? */ |
| 248 | if (lyxp_next_token(NULL, exp, &tok_idx, LYXP_TOKEN_OPER_PATH)) { |
Michal Vasko | cb8c6d4 | 2020-10-16 11:58:30 +0200 | [diff] [blame] | 249 | /* relative path check specific to leafref */ |
| 250 | if (lref == LY_PATH_LREF_TRUE) { |
| 251 | /* mandatory '..' */ |
| 252 | LY_CHECK_ERR_GOTO(lyxp_next_token(ctx, exp, &tok_idx, LYXP_TOKEN_DDOT), ret = LY_EVALID, error); |
| 253 | |
| 254 | do { |
| 255 | /* '/' */ |
| 256 | LY_CHECK_ERR_GOTO(lyxp_next_token(ctx, exp, &tok_idx, LYXP_TOKEN_OPER_PATH), ret = LY_EVALID, error); |
| 257 | |
| 258 | /* optional '..' */ |
| 259 | } while (!lyxp_next_token(NULL, exp, &tok_idx, LYXP_TOKEN_DDOT)); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 260 | } |
| 261 | } |
| 262 | } else { |
| 263 | /* '/' */ |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 264 | LY_CHECK_ERR_GOTO(lyxp_next_token(ctx, exp, &tok_idx, LYXP_TOKEN_OPER_PATH), ret = LY_EVALID, error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | do { |
| 268 | /* NameTest */ |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 269 | LY_CHECK_ERR_GOTO(lyxp_check_token(ctx, exp, tok_idx, LYXP_TOKEN_NAMETEST), ret = LY_EVALID, error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 270 | |
| 271 | /* check prefix based on the options */ |
Michal Vasko | 8b06a5e | 2020-08-06 12:13:08 +0200 | [diff] [blame] | 272 | cur_node = exp->expr + exp->tok_pos[tok_idx]; |
| 273 | cur_len = exp->tok_len[tok_idx]; |
| 274 | if (prefix == LY_PATH_PREFIX_MANDATORY) { |
| 275 | if (!strnstr(cur_node, ":", cur_len)) { |
| 276 | LOGVAL_P(ctx, ctx_node, LYVE_XPATH, "Prefix missing for \"%.*s\" in path.", cur_len, cur_node); |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 277 | ret = LY_EVALID; |
Michal Vasko | 8b06a5e | 2020-08-06 12:13:08 +0200 | [diff] [blame] | 278 | goto error; |
| 279 | } |
| 280 | } else if (prefix == LY_PATH_PREFIX_STRICT_INHERIT) { |
| 281 | if (!prev_prefix) { |
| 282 | /* the first node must have a prefix */ |
| 283 | if (!strnstr(cur_node, ":", cur_len)) { |
| 284 | LOGVAL_P(ctx, ctx_node, LYVE_XPATH, "Prefix missing for \"%.*s\" in path.", cur_len, cur_node); |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 285 | ret = LY_EVALID; |
Michal Vasko | 8b06a5e | 2020-08-06 12:13:08 +0200 | [diff] [blame] | 286 | goto error; |
| 287 | } |
| 288 | |
| 289 | /* remember the first prefix */ |
| 290 | prev_prefix = cur_node; |
| 291 | } else { |
| 292 | /* the prefix must be different, if any */ |
| 293 | ptr = strnstr(cur_node, ":", cur_len); |
| 294 | if (ptr) { |
| 295 | if (!strncmp(prev_prefix, cur_node, ptr - cur_node) && (prev_prefix[ptr - cur_node] == ':')) { |
| 296 | LOGVAL_P(ctx, ctx_node, LYVE_XPATH, "Duplicate prefix for \"%.*s\" in path.", cur_len, cur_node); |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 297 | ret = LY_EVALID; |
Michal Vasko | 8b06a5e | 2020-08-06 12:13:08 +0200 | [diff] [blame] | 298 | goto error; |
| 299 | } |
| 300 | |
| 301 | /* remember this next prefix */ |
| 302 | prev_prefix = cur_node; |
| 303 | } |
| 304 | } |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | ++tok_idx; |
| 308 | |
| 309 | /* Predicate* */ |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 310 | LY_CHECK_GOTO(ret = ly_path_check_predicate(ctx, ctx_node, exp, &tok_idx, prefix, pred), error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 311 | |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 312 | /* '/' */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 313 | } while (!lyxp_next_token(NULL, exp, &tok_idx, LYXP_TOKEN_OPER_PATH)); |
| 314 | |
| 315 | /* trailing token check */ |
| 316 | if (exp->used > tok_idx) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 317 | LOGVAL_P(ctx, ctx_node, LYVE_XPATH, "Unparsed characters \"%s\" left at the end of path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 318 | exp->expr + exp->tok_pos[tok_idx]); |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 319 | ret = LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 320 | goto error; |
| 321 | } |
| 322 | |
| 323 | *expr = exp; |
| 324 | return LY_SUCCESS; |
| 325 | |
| 326 | error: |
| 327 | lyxp_expr_free(ctx, exp); |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 328 | return ret; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | LY_ERR |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 332 | ly_path_parse_predicate(const struct ly_ctx *ctx, const struct lysc_node *cur_node, const char *str_path, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 333 | size_t path_len, uint8_t prefix, uint8_t pred, struct lyxp_expr **expr) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 334 | { |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 335 | LY_ERR ret = LY_SUCCESS; |
| 336 | struct lyxp_expr *exp = NULL; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 337 | uint16_t tok_idx; |
| 338 | |
| 339 | assert((prefix == LY_PATH_PREFIX_OPTIONAL) || (prefix == LY_PATH_PREFIX_MANDATORY)); |
| 340 | assert((pred == LY_PATH_PRED_KEYS) || (pred == LY_PATH_PRED_SIMPLE) || (pred == LY_PATH_PRED_LEAFREF)); |
| 341 | |
| 342 | /* parse as a generic XPath expression */ |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 343 | LY_CHECK_GOTO(ret = lyxp_expr_parse(ctx, str_path, path_len, 0, &exp), error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 344 | tok_idx = 0; |
| 345 | |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 346 | LY_CHECK_GOTO(ret = ly_path_check_predicate(ctx, cur_node, exp, &tok_idx, prefix, pred), error); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 347 | |
| 348 | /* trailing token check */ |
| 349 | if (exp->used > tok_idx) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 350 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Unparsed characters \"%s\" left at the end of predicate.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 351 | exp->expr + exp->tok_pos[tok_idx]); |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 352 | ret = LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 353 | goto error; |
| 354 | } |
| 355 | |
| 356 | *expr = exp; |
| 357 | return LY_SUCCESS; |
| 358 | |
| 359 | error: |
| 360 | lyxp_expr_free(ctx, exp); |
Radek Krejci | f03a9e2 | 2020-09-18 20:09:31 +0200 | [diff] [blame] | 361 | return ret; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | /** |
| 365 | * @brief Parse prefix from a NameTest, if any, and node name, and return expected module of the node. |
| 366 | * |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 367 | * @param[in] ctx libyang context. |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 368 | * @param[in] cur_node Optional current (original context) node. |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 369 | * @param[in] cur_mod Current module of the path (where the path is "instantiated"). Needed for ::LY_PREF_SCHEMA*. |
| 370 | * @param[in] prev_ctx_node Previous context node. Needed for ::LY_PREF_JSON. |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 371 | * @param[in] expr Parsed path. |
| 372 | * @param[in] tok_idx Index in @p expr. |
| 373 | * @param[in] lref Lref option. |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 374 | * @param[in] format Format of the path. |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 375 | * @param[in] prefix_data Format-specific data for resolving any prefixes (see ::ly_resolve_prefix). |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 376 | * @param[out] mod Resolved module. |
| 377 | * @param[out] name Parsed node name. |
| 378 | * @param[out] name_len Length of @p name. |
| 379 | * @return LY_ERR value. |
| 380 | */ |
| 381 | static LY_ERR |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 382 | ly_path_compile_prefix(const struct ly_ctx *ctx, const struct lysc_node *cur_node, const struct lys_module *cur_mod, |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 383 | const struct lysc_node *prev_ctx_node, const struct lyxp_expr *expr, uint16_t tok_idx, uint8_t lref, |
| 384 | LY_PREFIX_FORMAT format, void *prefix_data, const struct lys_module **mod, const char **name, size_t *name_len) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 385 | { |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 386 | const char *pref; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 387 | size_t len; |
| 388 | |
| 389 | assert(expr->tokens[tok_idx] == LYXP_TOKEN_NAMETEST); |
| 390 | |
| 391 | /* get prefix */ |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 392 | if ((pref = strnstr(expr->expr + expr->tok_pos[tok_idx], ":", expr->tok_len[tok_idx]))) { |
| 393 | len = pref - (expr->expr + expr->tok_pos[tok_idx]); |
| 394 | pref = expr->expr + expr->tok_pos[tok_idx]; |
| 395 | } else { |
| 396 | len = 0; |
| 397 | } |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 398 | |
| 399 | /* find next node module */ |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 400 | if (pref) { |
| 401 | *mod = ly_resolve_prefix(ctx, pref, len, format, prefix_data); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 402 | if (!*mod) { |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 403 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Prefix \"%.*s\" not found of a module in path.", len, pref); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 404 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 405 | } else if (!(*mod)->implemented) { |
| 406 | if (lref == LY_PATH_LREF_FALSE) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 407 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Not implemented module \"%s\" in path.", (*mod)->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 408 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 409 | } |
Michal Vasko | 7b1ad1a | 2020-11-02 15:41:27 +0100 | [diff] [blame] | 410 | LY_CHECK_RET(lys_set_implemented((struct lys_module *)*mod, NULL)); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 411 | } |
| 412 | } else { |
| 413 | switch (format) { |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 414 | case LY_PREF_SCHEMA: |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 415 | case LY_PREF_SCHEMA_RESOLVED: |
| 416 | if (!cur_mod) { |
| 417 | LOGINT_RET(ctx); |
| 418 | } |
| 419 | /* use current module */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 420 | *mod = cur_mod; |
| 421 | break; |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 422 | case LY_PREF_JSON: |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 423 | if (!prev_ctx_node) { |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 424 | LOGINT_RET(ctx); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 425 | } |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 426 | /* inherit module of the previous node */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 427 | *mod = prev_ctx_node->module; |
| 428 | break; |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 429 | case LY_PREF_XML: |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 430 | /* not really defined */ |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 431 | LOGINT_RET(ctx); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 432 | } |
| 433 | } |
| 434 | |
| 435 | /* set name */ |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 436 | if (pref) { |
| 437 | *name = pref + len + 1; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 438 | *name_len = expr->tok_len[tok_idx] - len - 1; |
| 439 | } else { |
| 440 | *name = expr->expr + expr->tok_pos[tok_idx]; |
| 441 | *name_len = expr->tok_len[tok_idx]; |
| 442 | } |
| 443 | |
| 444 | return LY_SUCCESS; |
| 445 | } |
| 446 | |
| 447 | LY_ERR |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 448 | ly_path_compile_predicate(const struct ly_ctx *ctx, const struct lysc_node *cur_node, const struct lys_module *cur_mod, |
Michal Vasko | 5d24f6c | 2020-10-13 13:49:06 +0200 | [diff] [blame] | 449 | const struct lysc_node *ctx_node, const struct lyxp_expr *expr, uint16_t *tok_idx, LY_PREFIX_FORMAT format, |
| 450 | void *prefix_data, struct ly_path_predicate **predicates, enum ly_path_pred_type *pred_type) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 451 | { |
| 452 | struct ly_path_predicate *p; |
| 453 | const struct lysc_node *key; |
Radek Krejci | 2b18bf1 | 2020-11-06 11:20:20 +0100 | [diff] [blame^] | 454 | const struct lys_module *mod = NULL; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 455 | const char *name; |
| 456 | size_t name_len, key_count; |
| 457 | |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 458 | assert(ctx && ctx_node); |
| 459 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 460 | *pred_type = 0; |
| 461 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 462 | if (lyxp_next_token(NULL, expr, tok_idx, LYXP_TOKEN_BRACK1)) { |
Radek Krejci | f6a1100 | 2020-08-21 13:29:07 +0200 | [diff] [blame] | 463 | /* '[', no predicate */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 464 | return LY_SUCCESS; |
| 465 | } |
| 466 | |
| 467 | if (expr->tokens[*tok_idx] == LYXP_TOKEN_NAMETEST) { |
| 468 | if (ctx_node->nodetype != LYS_LIST) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 469 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "List predicate defined for %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 470 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 471 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 472 | } else if (ctx_node->flags & LYS_KEYLESS) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 473 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "List predicate defined for keyless %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 474 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 475 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 476 | } |
| 477 | |
| 478 | do { |
| 479 | /* NameTest, find the key */ |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 480 | LY_CHECK_RET(ly_path_compile_prefix(ctx, cur_node, cur_mod, ctx_node, expr, *tok_idx, LY_PATH_LREF_FALSE, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 481 | format, prefix_data, &mod, &name, &name_len)); |
Michal Vasko | 7b1ad1a | 2020-11-02 15:41:27 +0100 | [diff] [blame] | 482 | key = lys_find_child(ctx_node, mod, name, name_len, 0, 0); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 483 | if (!key) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 484 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Not found node \"%.*s\" in path.", name_len, name); |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 485 | return LY_ENOTFOUND; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 486 | } else if ((key->nodetype != LYS_LEAF) || !(key->flags & LYS_KEY)) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 487 | LOGVAL_P(ctx, cur_node ? cur_node : key, LYVE_XPATH, "Key expected instead of %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 488 | lys_nodetype2str(key->nodetype), key->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 489 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 490 | } |
| 491 | ++(*tok_idx); |
| 492 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 493 | if (!*pred_type) { |
Radek Krejci | f6a1100 | 2020-08-21 13:29:07 +0200 | [diff] [blame] | 494 | /* new predicate */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 495 | *pred_type = LY_PATH_PREDTYPE_LIST; |
| 496 | } |
| 497 | assert(*pred_type == LY_PATH_PREDTYPE_LIST); |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 498 | LY_ARRAY_NEW_RET(ctx, *predicates, p, LY_EMEM); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 499 | p->key = key; |
| 500 | |
| 501 | /* '=' */ |
| 502 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_OPER_EQUAL); |
| 503 | ++(*tok_idx); |
| 504 | |
| 505 | /* Literal */ |
| 506 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_LITERAL); |
Michal Vasko | feca4fb | 2020-10-05 08:58:40 +0200 | [diff] [blame] | 507 | LY_CHECK_RET(lyd_value_store(ctx, &p->value, ((struct lysc_node_leaf *)key)->type, |
| 508 | expr->expr + expr->tok_pos[*tok_idx] + 1, expr->tok_len[*tok_idx] - 2, NULL, format, prefix_data, |
| 509 | LYD_HINT_DATA, key, NULL, LY_VLOG_LYSC, key)); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 510 | ++(*tok_idx); |
| 511 | |
Michal Vasko | ae87566 | 2020-10-21 10:33:17 +0200 | [diff] [blame] | 512 | /* "allocate" the type to avoid problems when freeing the value after the type was freed */ |
| 513 | ++((struct lysc_type *)p->value.realtype)->refcount; |
| 514 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 515 | /* ']' */ |
| 516 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_BRACK2); |
| 517 | ++(*tok_idx); |
| 518 | |
| 519 | /* another predicate follows? */ |
| 520 | } while (!lyxp_next_token(NULL, expr, tok_idx, LYXP_TOKEN_BRACK1)); |
| 521 | |
| 522 | /* check that all keys were set */ |
| 523 | key_count = 0; |
| 524 | for (key = lysc_node_children(ctx_node, 0); key && (key->flags & LYS_KEY); key = key->next) { |
| 525 | ++key_count; |
| 526 | } |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 527 | if (LY_ARRAY_COUNT(*predicates) != key_count) { |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 528 | /* names (keys) are unique - it was checked when parsing */ |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 529 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Predicate missing for a key of %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 530 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Michal Vasko | f7e16e2 | 2020-10-21 09:24:39 +0200 | [diff] [blame] | 531 | ly_path_predicates_free(ctx, LY_PATH_PREDTYPE_LIST, *predicates); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 532 | *predicates = NULL; |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 533 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | } else if (expr->tokens[*tok_idx] == LYXP_TOKEN_DOT) { |
| 537 | if (ctx_node->nodetype != LYS_LEAFLIST) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 538 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Leaf-list predicate defined for %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 539 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 540 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 541 | } |
| 542 | ++(*tok_idx); |
| 543 | |
| 544 | /* new predicate */ |
| 545 | *pred_type = LY_PATH_PREDTYPE_LEAFLIST; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 546 | LY_ARRAY_NEW_RET(ctx, *predicates, p, LY_EMEM); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 547 | |
| 548 | /* '=' */ |
| 549 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_OPER_EQUAL); |
| 550 | ++(*tok_idx); |
| 551 | |
| 552 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_LITERAL); |
| 553 | /* store the value */ |
Michal Vasko | feca4fb | 2020-10-05 08:58:40 +0200 | [diff] [blame] | 554 | LY_CHECK_RET(lyd_value_store(ctx, &p->value, ((struct lysc_node_leaflist *)ctx_node)->type, |
| 555 | expr->expr + expr->tok_pos[*tok_idx] + 1, expr->tok_len[*tok_idx] - 2, NULL, format, prefix_data, |
| 556 | LYD_HINT_DATA, ctx_node, NULL, LY_VLOG_LYSC, ctx_node)); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 557 | ++(*tok_idx); |
| 558 | |
Michal Vasko | ae87566 | 2020-10-21 10:33:17 +0200 | [diff] [blame] | 559 | /* "allocate" the type to avoid problems when freeing the value after the type was freed */ |
| 560 | ++((struct lysc_type *)p->value.realtype)->refcount; |
| 561 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 562 | /* ']' */ |
| 563 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_BRACK2); |
| 564 | ++(*tok_idx); |
| 565 | } else { |
| 566 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_NUMBER); |
| 567 | if (!(ctx_node->nodetype & (LYS_LEAFLIST | LYS_LIST))) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 568 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Positional predicate defined for %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 569 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 570 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 571 | } else if (ctx_node->flags & LYS_CONFIG_W) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 572 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Positional predicate defined for configuration %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 573 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 574 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 575 | } |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 576 | |
| 577 | /* new predicate */ |
| 578 | *pred_type = LY_PATH_PREDTYPE_POSITION; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 579 | LY_ARRAY_NEW_RET(ctx, *predicates, p, LY_EMEM); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 580 | |
| 581 | /* syntax was already checked */ |
| 582 | p->position = strtoull(expr->expr + expr->tok_pos[*tok_idx], (char **)&name, 10); |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 583 | ++(*tok_idx); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 584 | |
| 585 | /* ']' */ |
| 586 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_BRACK2); |
| 587 | ++(*tok_idx); |
| 588 | } |
| 589 | |
| 590 | return LY_SUCCESS; |
| 591 | } |
| 592 | |
| 593 | /** |
| 594 | * @brief Compile leafref predicate. Actually, it is only checked. |
| 595 | * |
| 596 | * @param[in] ctx_node Context node, node for which the predicate is defined. |
| 597 | * @param[in] cur_node Current (original context) node. |
| 598 | * @param[in] expr Parsed path. |
| 599 | * @param[in,out] tok_idx Index in @p expr, is adjusted for parsed tokens. |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 600 | * @param[in] format Format of the path. |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 601 | * @param[in] prefix_data Format-specific data for resolving any prefixes (see ::ly_resolve_prefix). |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 602 | * @return LY_ERR value. |
| 603 | */ |
| 604 | static LY_ERR |
| 605 | ly_path_compile_predicate_leafref(const struct lysc_node *ctx_node, const struct lysc_node *cur_node, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 606 | const struct lyxp_expr *expr, uint16_t *tok_idx, LY_PREFIX_FORMAT format, void *prefix_data) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 607 | { |
| 608 | const struct lysc_node *key, *node, *node2; |
| 609 | const struct lys_module *mod; |
| 610 | const char *name; |
| 611 | size_t name_len; |
| 612 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 613 | if (lyxp_next_token(NULL, expr, tok_idx, LYXP_TOKEN_BRACK1)) { |
Radek Krejci | f6a1100 | 2020-08-21 13:29:07 +0200 | [diff] [blame] | 614 | /* '[', no predicate */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 615 | return LY_SUCCESS; |
| 616 | } |
| 617 | |
| 618 | if (ctx_node->nodetype != LYS_LIST) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 619 | LOGVAL_P(cur_node->module->ctx, cur_node, LYVE_XPATH, "List predicate defined for %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 620 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 621 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 622 | } else if (ctx_node->flags & LYS_KEYLESS) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 623 | LOGVAL_P(cur_node->module->ctx, cur_node, LYVE_XPATH, "List predicate defined for keyless %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 624 | lys_nodetype2str(ctx_node->nodetype), ctx_node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 625 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | do { |
| 629 | /* NameTest, find the key */ |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 630 | LY_CHECK_RET(ly_path_compile_prefix(cur_node->module->ctx, cur_node, cur_node->module, ctx_node, expr, *tok_idx, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 631 | LY_PATH_LREF_TRUE, format, prefix_data, &mod, &name, &name_len)); |
Michal Vasko | 7b1ad1a | 2020-11-02 15:41:27 +0100 | [diff] [blame] | 632 | key = lys_find_child(ctx_node, mod, name, name_len, 0, 0); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 633 | if (!key) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 634 | LOGVAL_P(cur_node->module->ctx, cur_node, LYVE_XPATH, "Not found node \"%.*s\" in path.", name_len, name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 635 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 636 | } else if ((key->nodetype != LYS_LEAF) || !(key->flags & LYS_KEY)) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 637 | LOGVAL_P(cur_node->module->ctx, cur_node, LYVE_XPATH, "Key expected instead of %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 638 | lys_nodetype2str(key->nodetype), key->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 639 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 640 | } |
| 641 | ++(*tok_idx); |
| 642 | |
| 643 | /* we are not actually compiling, throw the key away */ |
| 644 | (void)key; |
| 645 | |
| 646 | /* '=' */ |
| 647 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_OPER_EQUAL); |
| 648 | ++(*tok_idx); |
| 649 | |
| 650 | /* FuncName */ |
| 651 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_FUNCNAME); |
| 652 | ++(*tok_idx); |
| 653 | |
| 654 | /* evaluating from the "current()" node */ |
| 655 | node = cur_node; |
| 656 | |
| 657 | /* '(' */ |
| 658 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_PAR1); |
| 659 | ++(*tok_idx); |
| 660 | |
| 661 | /* ')' */ |
| 662 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_PAR2); |
| 663 | ++(*tok_idx); |
| 664 | |
| 665 | do { |
| 666 | /* '/' */ |
| 667 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_OPER_PATH); |
| 668 | ++(*tok_idx); |
| 669 | |
| 670 | /* go to parent */ |
| 671 | if (!node) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 672 | LOGVAL_P(cur_node->module->ctx, cur_node, LYVE_XPATH, "Too many parent references in path."); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 673 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 674 | } |
| 675 | node = lysc_data_parent(node); |
| 676 | |
| 677 | /* '..' */ |
| 678 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_DDOT); |
| 679 | ++(*tok_idx); |
| 680 | } while (expr->tokens[*tok_idx + 1] == LYXP_TOKEN_DDOT); |
| 681 | |
| 682 | do { |
| 683 | /* '/' */ |
| 684 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_OPER_PATH); |
| 685 | ++(*tok_idx); |
| 686 | |
| 687 | /* NameTest */ |
| 688 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_NAMETEST); |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 689 | LY_CHECK_RET(ly_path_compile_prefix(cur_node->module->ctx, cur_node, cur_node->module, node, expr, *tok_idx, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 690 | LY_PATH_LREF_TRUE, format, prefix_data, &mod, &name, &name_len)); |
Michal Vasko | 7b1ad1a | 2020-11-02 15:41:27 +0100 | [diff] [blame] | 691 | node2 = lys_find_child(node, mod, name, name_len, 0, 0); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 692 | if (!node2) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 693 | LOGVAL_P(cur_node->module->ctx, cur_node, LYVE_XPATH, "Not found node \"%.*s\" in path.", name_len, name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 694 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 695 | } |
| 696 | node = node2; |
| 697 | ++(*tok_idx); |
| 698 | } while ((*tok_idx + 1 < expr->used) && (expr->tokens[*tok_idx + 1] == LYXP_TOKEN_NAMETEST)); |
| 699 | |
| 700 | /* check the last target node */ |
| 701 | if (node->nodetype != LYS_LEAF) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 702 | LOGVAL_P(cur_node->module->ctx, cur_node, LYVE_XPATH, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 703 | "Leaf expected instead of %s \"%s\" in leafref predicate in path.", |
| 704 | lys_nodetype2str(node->nodetype), node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 705 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 706 | } |
| 707 | |
| 708 | /* we are not actually compiling, throw the rightside node away */ |
| 709 | (void)node; |
| 710 | |
| 711 | /* ']' */ |
| 712 | assert(expr->tokens[*tok_idx] == LYXP_TOKEN_BRACK2); |
| 713 | ++(*tok_idx); |
| 714 | |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 715 | /* another predicate follows? */ |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 716 | } while (!lyxp_next_token(NULL, expr, tok_idx, LYXP_TOKEN_BRACK1)); |
| 717 | |
| 718 | return LY_SUCCESS; |
| 719 | } |
| 720 | |
| 721 | LY_ERR |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 722 | ly_path_compile(const struct ly_ctx *ctx, const struct lys_module *cur_mod, const struct lysc_node *ctx_node, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 723 | const struct lyxp_expr *expr, uint8_t lref, uint8_t oper, uint8_t target, LY_PREFIX_FORMAT format, |
| 724 | void *prefix_data, struct ly_path **path) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 725 | { |
| 726 | LY_ERR ret = LY_SUCCESS; |
| 727 | uint16_t tok_idx = 0; |
Radek Krejci | 2b18bf1 | 2020-11-06 11:20:20 +0100 | [diff] [blame^] | 728 | const struct lys_module *mod = NULL; |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 729 | const struct lysc_node *node2, *cur_node, *op; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 730 | struct ly_path *p = NULL; |
Radek Krejci | 1deb5be | 2020-08-26 16:43:36 +0200 | [diff] [blame] | 731 | uint32_t getnext_opts; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 732 | const char *name; |
| 733 | size_t name_len; |
| 734 | |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 735 | assert(ctx); |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 736 | assert((lref == LY_PATH_LREF_FALSE) || ctx_node); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 737 | assert((lref == LY_PATH_LREF_TRUE) || (lref == LY_PATH_LREF_FALSE)); |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 738 | assert((oper == LY_PATH_OPER_INPUT) || (oper == LY_PATH_OPER_OUTPUT)); |
| 739 | assert((target == LY_PATH_TARGET_SINGLE) || (target == LY_PATH_TARGET_MANY)); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 740 | |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 741 | /* find operation, if we are in any */ |
Radek Krejci | 1e008d2 | 2020-08-17 11:37:37 +0200 | [diff] [blame] | 742 | for (op = ctx_node; op && !(op->nodetype & (LYS_RPC | LYS_ACTION | LYS_NOTIF)); op = op->parent) {} |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 743 | |
| 744 | /* remember original context node */ |
| 745 | cur_node = ctx_node; |
| 746 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 747 | *path = NULL; |
| 748 | |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 749 | if (oper == LY_PATH_OPER_OUTPUT) { |
Michal Vasko | 7b1ad1a | 2020-11-02 15:41:27 +0100 | [diff] [blame] | 750 | getnext_opts = LYS_GETNEXT_OUTPUT; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 751 | } else { |
Michal Vasko | 7b1ad1a | 2020-11-02 15:41:27 +0100 | [diff] [blame] | 752 | getnext_opts = 0; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 753 | } |
| 754 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 755 | if (expr->tokens[tok_idx] == LYXP_TOKEN_OPER_PATH) { |
| 756 | /* absolute path */ |
| 757 | ctx_node = NULL; |
| 758 | |
| 759 | ++tok_idx; |
| 760 | } else { |
| 761 | /* relative path */ |
| 762 | while ((lref == LY_PATH_LREF_TRUE) && (expr->tokens[tok_idx] == LYXP_TOKEN_DDOT)) { |
| 763 | if (!ctx_node) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 764 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Too many parent references in path."); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 765 | return LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /* get parent */ |
| 769 | ctx_node = lysc_data_parent(ctx_node); |
| 770 | |
| 771 | ++tok_idx; |
| 772 | |
| 773 | assert(expr->tokens[tok_idx] == LYXP_TOKEN_OPER_PATH); |
| 774 | ++tok_idx; |
| 775 | } |
| 776 | |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 777 | /* we are not storing the parent */ |
| 778 | (void)ctx_node; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 779 | } |
| 780 | |
| 781 | do { |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 782 | /* check last compiled inner node, whether it is uniquely identified (even key-less list) */ |
| 783 | if (p && (lref == LY_PATH_LREF_FALSE) && (p->node->nodetype == LYS_LIST) && !p->predicates) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 784 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Predicate missing for %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 785 | lys_nodetype2str(p->node->nodetype), p->node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 786 | return LY_EVALID; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 787 | } |
| 788 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 789 | /* get module and node name */ |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 790 | LY_CHECK_GOTO(ret = ly_path_compile_prefix(ctx, cur_node, cur_mod, ctx_node, expr, tok_idx, lref, format, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 791 | prefix_data, &mod, &name, &name_len), cleanup); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 792 | ++tok_idx; |
| 793 | |
| 794 | /* find the next node */ |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 795 | node2 = lys_find_child(ctx_node, mod, name, name_len, 0, getnext_opts); |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 796 | if (!node2 || ((node2->nodetype & (LYS_RPC | LYS_ACTION | LYS_NOTIF)) && (node2 != op))) { |
| 797 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Not found node \"%.*s\" in path.", name_len, name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 798 | ret = LY_EVALID; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 799 | goto cleanup; |
| 800 | } |
| 801 | ctx_node = node2; |
| 802 | |
| 803 | /* new path segment */ |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 804 | LY_ARRAY_NEW_GOTO(ctx, *path, p, ret, cleanup); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 805 | p->node = ctx_node; |
| 806 | |
| 807 | /* compile any predicates */ |
| 808 | if (lref == LY_PATH_LREF_TRUE) { |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 809 | ret = ly_path_compile_predicate_leafref(ctx_node, cur_node, expr, &tok_idx, format, prefix_data); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 810 | } else { |
Michal Vasko | c8a230d | 2020-08-14 12:17:10 +0200 | [diff] [blame] | 811 | ret = ly_path_compile_predicate(ctx, cur_node, cur_mod, ctx_node, expr, &tok_idx, format, prefix_data, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 812 | &p->predicates, &p->pred_type); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 813 | } |
| 814 | LY_CHECK_GOTO(ret, cleanup); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 815 | } while (!lyxp_next_token(NULL, expr, &tok_idx, LYXP_TOKEN_OPER_PATH)); |
| 816 | |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 817 | /* check last compiled node */ |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 818 | if ((lref == LY_PATH_LREF_FALSE) && (target == LY_PATH_TARGET_SINGLE) && |
| 819 | (p->node->nodetype & (LYS_LIST | LYS_LEAFLIST)) && !p->predicates) { |
Michal Vasko | 6b26e74 | 2020-07-17 15:02:10 +0200 | [diff] [blame] | 820 | LOGVAL_P(ctx, cur_node, LYVE_XPATH, "Predicate missing for %s \"%s\" in path.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 821 | lys_nodetype2str(p->node->nodetype), p->node->name); |
Radek Krejci | 8de005f | 2020-06-25 17:02:07 +0200 | [diff] [blame] | 822 | return LY_EVALID; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 823 | } |
| 824 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 825 | cleanup: |
| 826 | if (ret) { |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 827 | ly_path_free(ctx, *path); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 828 | *path = NULL; |
| 829 | } |
| 830 | return ret; |
| 831 | } |
| 832 | |
| 833 | LY_ERR |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 834 | ly_path_eval_partial(const struct ly_path *path, const struct lyd_node *start, LY_ARRAY_COUNT_TYPE *path_idx, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 835 | struct lyd_node **match) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 836 | { |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 837 | LY_ARRAY_COUNT_TYPE u; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 838 | struct lyd_node *prev_node = NULL, *node, *target; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 839 | uint64_t pos; |
| 840 | |
| 841 | assert(path && start); |
| 842 | |
| 843 | if (lysc_data_parent(path[0].node)) { |
| 844 | /* relative path, start from the parent children */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 845 | start = lyd_child(start); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 846 | } else { |
| 847 | /* absolute path, start from the first top-level sibling */ |
| 848 | while (start->parent) { |
| 849 | start = (struct lyd_node *)start->parent; |
| 850 | } |
| 851 | while (start->prev->next) { |
| 852 | start = start->prev; |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | LY_ARRAY_FOR(path, u) { |
| 857 | switch (path[u].pred_type) { |
| 858 | case LY_PATH_PREDTYPE_POSITION: |
| 859 | /* we cannot use hashes and want an instance on a specific position */ |
| 860 | pos = 1; |
Michal Vasko | 4c583e8 | 2020-07-17 12:16:14 +0200 | [diff] [blame] | 861 | LYD_LIST_FOR_INST(start, path[u].node, node) { |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 862 | if (pos == path[u].predicates[0].position) { |
| 863 | break; |
| 864 | } |
| 865 | ++pos; |
| 866 | } |
| 867 | break; |
| 868 | case LY_PATH_PREDTYPE_LEAFLIST: |
| 869 | /* we will use hashes to find one leaf-list instance */ |
| 870 | LY_CHECK_RET(lyd_create_term2(path[u].node, &path[u].predicates[0].value, &target)); |
| 871 | lyd_find_sibling_first(start, target, &node); |
| 872 | lyd_free_tree(target); |
| 873 | break; |
| 874 | case LY_PATH_PREDTYPE_LIST: |
| 875 | /* we will use hashes to find one list instance */ |
| 876 | LY_CHECK_RET(lyd_create_list(path[u].node, path[u].predicates, &target)); |
| 877 | lyd_find_sibling_first(start, target, &node); |
| 878 | lyd_free_tree(target); |
| 879 | break; |
| 880 | case LY_PATH_PREDTYPE_NONE: |
| 881 | /* we will use hashes to find one any/container/leaf instance */ |
| 882 | lyd_find_sibling_val(start, path[u].node, NULL, 0, &node); |
| 883 | break; |
| 884 | } |
| 885 | |
| 886 | if (!node) { |
| 887 | /* no matching nodes */ |
| 888 | break; |
| 889 | } |
| 890 | |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 891 | /* rememeber previous node */ |
| 892 | prev_node = node; |
| 893 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 894 | /* next path segment, if any */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 895 | start = lyd_child(node); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 896 | } |
| 897 | |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 898 | if (node) { |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 899 | /* we have found the full path */ |
| 900 | if (path_idx) { |
| 901 | *path_idx = u; |
| 902 | } |
| 903 | if (match) { |
| 904 | *match = node; |
| 905 | } |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 906 | return LY_SUCCESS; |
Michal Vasko | 00cbf53 | 2020-06-15 13:58:47 +0200 | [diff] [blame] | 907 | |
| 908 | } else if (prev_node) { |
| 909 | /* we have found only some partial match */ |
| 910 | if (path_idx) { |
| 911 | *path_idx = u - 1; |
| 912 | } |
| 913 | if (match) { |
| 914 | *match = prev_node; |
| 915 | } |
| 916 | return LY_EINCOMPLETE; |
| 917 | } |
| 918 | |
| 919 | /* we have not found any nodes */ |
| 920 | if (path_idx) { |
| 921 | *path_idx = 0; |
| 922 | } |
| 923 | if (match) { |
| 924 | *match = NULL; |
| 925 | } |
| 926 | return LY_ENOTFOUND; |
| 927 | } |
| 928 | |
| 929 | LY_ERR |
| 930 | ly_path_eval(const struct ly_path *path, const struct lyd_node *start, struct lyd_node **match) |
| 931 | { |
| 932 | LY_ERR ret; |
| 933 | struct lyd_node *m; |
| 934 | |
| 935 | ret = ly_path_eval_partial(path, start, NULL, &m); |
| 936 | |
| 937 | if (ret == LY_SUCCESS) { |
| 938 | /* last node was found */ |
| 939 | if (match) { |
| 940 | *match = m; |
| 941 | } |
| 942 | return LY_SUCCESS; |
| 943 | } |
| 944 | |
| 945 | /* not a full match */ |
| 946 | if (match) { |
| 947 | *match = NULL; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 948 | } |
| 949 | return LY_ENOTFOUND; |
| 950 | } |
| 951 | |
| 952 | LY_ERR |
| 953 | ly_path_dup(const struct ly_ctx *ctx, const struct ly_path *path, struct ly_path **dup) |
| 954 | { |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 955 | LY_ARRAY_COUNT_TYPE u, v; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 956 | |
| 957 | if (!path) { |
| 958 | return LY_SUCCESS; |
| 959 | } |
| 960 | |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 961 | LY_ARRAY_CREATE_RET(ctx, *dup, LY_ARRAY_COUNT(path), LY_EMEM); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 962 | LY_ARRAY_FOR(path, u) { |
| 963 | LY_ARRAY_INCREMENT(*dup); |
| 964 | (*dup)[u].node = path[u].node; |
| 965 | if (path[u].predicates) { |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 966 | LY_ARRAY_CREATE_RET(ctx, (*dup)[u].predicates, LY_ARRAY_COUNT(path[u].predicates), LY_EMEM); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 967 | (*dup)[u].pred_type = path[u].pred_type; |
| 968 | LY_ARRAY_FOR(path[u].predicates, v) { |
| 969 | struct ly_path_predicate *pred = &path[u].predicates[v]; |
| 970 | |
| 971 | LY_ARRAY_INCREMENT((*dup)[u].predicates); |
| 972 | switch (path[u].pred_type) { |
| 973 | case LY_PATH_PREDTYPE_POSITION: |
| 974 | /* position-predicate */ |
| 975 | (*dup)[u].predicates[v].position = pred->position; |
| 976 | break; |
| 977 | case LY_PATH_PREDTYPE_LIST: |
| 978 | case LY_PATH_PREDTYPE_LEAFLIST: |
| 979 | /* key-predicate or leaf-list-predicate */ |
| 980 | (*dup)[u].predicates[v].key = pred->key; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 981 | pred->value.realtype->plugin->duplicate(ctx, &pred->value, &(*dup)[u].predicates[v].value); |
Michal Vasko | ae87566 | 2020-10-21 10:33:17 +0200 | [diff] [blame] | 982 | ++((struct lysc_type *)pred->value.realtype)->refcount; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 983 | break; |
| 984 | case LY_PATH_PREDTYPE_NONE: |
| 985 | break; |
| 986 | } |
| 987 | } |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | return LY_SUCCESS; |
| 992 | } |
| 993 | |
| 994 | void |
Michal Vasko | f7e16e2 | 2020-10-21 09:24:39 +0200 | [diff] [blame] | 995 | ly_path_predicates_free(const struct ly_ctx *ctx, enum ly_path_pred_type pred_type, struct ly_path_predicate *predicates) |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 996 | { |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 997 | LY_ARRAY_COUNT_TYPE u; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 998 | |
| 999 | if (!predicates) { |
| 1000 | return; |
| 1001 | } |
| 1002 | |
| 1003 | LY_ARRAY_FOR(predicates, u) { |
| 1004 | switch (pred_type) { |
| 1005 | case LY_PATH_PREDTYPE_POSITION: |
| 1006 | case LY_PATH_PREDTYPE_NONE: |
| 1007 | /* nothing to free */ |
| 1008 | break; |
| 1009 | case LY_PATH_PREDTYPE_LIST: |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 1010 | case LY_PATH_PREDTYPE_LEAFLIST: |
Michal Vasko | ae87566 | 2020-10-21 10:33:17 +0200 | [diff] [blame] | 1011 | if (predicates[u].value.realtype) { |
| 1012 | predicates[u].value.realtype->plugin->free(ctx, &predicates[u].value); |
| 1013 | lysc_type_free((struct ly_ctx *)ctx, (struct lysc_type *)predicates[u].value.realtype); |
| 1014 | } |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 1015 | break; |
| 1016 | } |
| 1017 | } |
| 1018 | LY_ARRAY_FREE(predicates); |
| 1019 | } |
| 1020 | |
| 1021 | void |
| 1022 | ly_path_free(const struct ly_ctx *ctx, struct ly_path *path) |
| 1023 | { |
Michal Vasko | fd69e1d | 2020-07-03 11:57:17 +0200 | [diff] [blame] | 1024 | LY_ARRAY_COUNT_TYPE u; |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 1025 | |
| 1026 | LY_ARRAY_FOR(path, u) { |
Michal Vasko | f7e16e2 | 2020-10-21 09:24:39 +0200 | [diff] [blame] | 1027 | ly_path_predicates_free(ctx, path[u].pred_type, path[u].predicates); |
Michal Vasko | 004d315 | 2020-06-11 19:59:22 +0200 | [diff] [blame] | 1028 | } |
| 1029 | LY_ARRAY_FREE(path); |
| 1030 | } |