1 // SPDX-License-Identifier: GPL-2.0
8 #include "expr-bison.h"
10 #include <linux/kernel.h>
13 extern int expr_debug;
16 static size_t key_hash(const void *key, void *ctx __maybe_unused)
18 const char *str = (const char *)key;
21 while (*str != '\0') {
29 static bool key_equal(const void *key1, const void *key2,
30 void *ctx __maybe_unused)
32 return !strcmp((const char *)key1, (const char *)key2);
35 /* Caller must make sure id is allocated */
36 int expr__add_id(struct expr_parse_ctx *ctx, const char *id)
38 struct expr_id_data *data_ptr = NULL, *old_data = NULL;
42 data_ptr = malloc(sizeof(*data_ptr));
46 ret = hashmap__set(&ctx->ids, id, data_ptr,
47 (const void **)&old_key, (void **)&old_data);
55 /* Caller must make sure id is allocated */
56 int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
58 struct expr_id_data *data_ptr = NULL, *old_data = NULL;
62 data_ptr = malloc(sizeof(*data_ptr));
67 ret = hashmap__set(&ctx->ids, id, data_ptr,
68 (const void **)&old_key, (void **)&old_data);
76 int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr)
78 struct expr_id_data *data;
80 if (!hashmap__find(&ctx->ids, id, (void **)&data))
82 *val_ptr = (data == NULL) ? 0.0 : data->val;
86 void expr__ctx_init(struct expr_parse_ctx *ctx)
88 hashmap__init(&ctx->ids, key_hash, key_equal, NULL);
91 void expr__ctx_clear(struct expr_parse_ctx *ctx)
93 struct hashmap_entry *cur;
96 hashmap__for_each_entry((&ctx->ids), cur, bkt) {
97 free((char *)cur->key);
100 hashmap__clear(&ctx->ids);
104 __expr__parse(double *val, struct expr_parse_ctx *ctx, const char *expr,
105 int start, int runtime)
107 struct expr_scanner_ctx scanner_ctx = {
108 .start_token = start,
111 YY_BUFFER_STATE buffer;
115 ret = expr_lex_init_extra(&scanner_ctx, &scanner);
119 buffer = expr__scan_string(expr, scanner);
123 expr_set_debug(1, scanner);
126 ret = expr_parse(val, ctx, scanner);
128 expr__flush_buffer(buffer, scanner);
129 expr__delete_buffer(buffer, scanner);
130 expr_lex_destroy(scanner);
134 int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
135 const char *expr, int runtime)
137 return __expr__parse(final_val, ctx, expr, EXPR_PARSE, runtime) ? -1 : 0;
140 int expr__find_other(const char *expr, const char *one,
141 struct expr_parse_ctx *ctx, int runtime)
143 struct expr_id_data *old_val = NULL;
144 char *old_key = NULL;
145 int ret = __expr__parse(NULL, ctx, expr, EXPR_OTHER, runtime);
148 hashmap__delete(&ctx->ids, one,
149 (const void **)&old_key, (void **)&old_val);