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 *name, double val)
38 double *val_ptr = NULL, *old_val = NULL;
43 val_ptr = malloc(sizeof(double));
48 ret = hashmap__set(&ctx->ids, name, val_ptr,
49 (const void **)&old_key, (void **)&old_val);
55 int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr)
59 if (!hashmap__find(&ctx->ids, id, (void **)&data))
61 *val_ptr = (data == NULL) ? 0.0 : *data;
65 void expr__ctx_init(struct expr_parse_ctx *ctx)
67 hashmap__init(&ctx->ids, key_hash, key_equal, NULL);
70 void expr__ctx_clear(struct expr_parse_ctx *ctx)
72 struct hashmap_entry *cur;
75 hashmap__for_each_entry((&ctx->ids), cur, bkt) {
76 free((char *)cur->key);
79 hashmap__clear(&ctx->ids);
83 __expr__parse(double *val, struct expr_parse_ctx *ctx, const char *expr,
84 int start, int runtime)
86 struct expr_scanner_ctx scanner_ctx = {
90 YY_BUFFER_STATE buffer;
94 ret = expr_lex_init_extra(&scanner_ctx, &scanner);
98 buffer = expr__scan_string(expr, scanner);
102 expr_set_debug(1, scanner);
105 ret = expr_parse(val, ctx, scanner);
107 expr__flush_buffer(buffer, scanner);
108 expr__delete_buffer(buffer, scanner);
109 expr_lex_destroy(scanner);
113 int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
114 const char *expr, int runtime)
116 return __expr__parse(final_val, ctx, expr, EXPR_PARSE, runtime) ? -1 : 0;
119 int expr__find_other(const char *expr, const char *one,
120 struct expr_parse_ctx *ctx, int runtime)
122 double *old_val = NULL;
123 char *old_key = NULL;
124 int ret = __expr__parse(NULL, ctx, expr, EXPR_OTHER, runtime);
127 hashmap__delete(&ctx->ids, one,
128 (const void **)&old_key, (void **)&old_val);