1 // SPDX-License-Identifier: GPL-2.0
5 #include "expr-bison.h"
7 #include <linux/kernel.h>
10 extern int expr_debug;
13 static size_t key_hash(const void *key, void *ctx __maybe_unused)
15 const char *str = (const char *)key;
18 while (*str != '\0') {
26 static bool key_equal(const void *key1, const void *key2,
27 void *ctx __maybe_unused)
29 return !strcmp((const char *)key1, (const char *)key2);
32 /* Caller must make sure id is allocated */
33 int expr__add_id(struct expr_parse_ctx *ctx, const char *name, double val)
35 double *val_ptr = NULL, *old_val = NULL;
40 val_ptr = malloc(sizeof(double));
45 ret = hashmap__set(&ctx->ids, name, val_ptr,
46 (const void **)&old_key, (void **)&old_val);
52 int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr)
56 if (!hashmap__find(&ctx->ids, id, (void **)&data))
58 *val_ptr = (data == NULL) ? 0.0 : *data;
62 void expr__ctx_init(struct expr_parse_ctx *ctx)
64 hashmap__init(&ctx->ids, key_hash, key_equal, NULL);
67 void expr__ctx_clear(struct expr_parse_ctx *ctx)
69 struct hashmap_entry *cur;
72 hashmap__for_each_entry((&ctx->ids), cur, bkt) {
73 free((char *)cur->key);
76 hashmap__clear(&ctx->ids);
80 __expr__parse(double *val, struct expr_parse_ctx *ctx, const char *expr,
81 int start, int runtime)
83 struct expr_scanner_ctx scanner_ctx = {
87 YY_BUFFER_STATE buffer;
91 ret = expr_lex_init_extra(&scanner_ctx, &scanner);
95 buffer = expr__scan_string(expr, scanner);
99 expr_set_debug(1, scanner);
102 ret = expr_parse(val, ctx, scanner);
104 expr__flush_buffer(buffer, scanner);
105 expr__delete_buffer(buffer, scanner);
106 expr_lex_destroy(scanner);
110 int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
111 const char *expr, int runtime)
113 return __expr__parse(final_val, ctx, expr, EXPR_PARSE, runtime) ? -1 : 0;
116 int expr__find_other(const char *expr, const char *one,
117 struct expr_parse_ctx *ctx, int runtime)
119 double *old_val = NULL;
120 char *old_key = NULL;
121 int ret = __expr__parse(NULL, ctx, expr, EXPR_OTHER, runtime);
124 hashmap__delete(&ctx->ids, one,
125 (const void **)&old_key, (void **)&old_val);