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-rw-r--r--scripts/kconfig/symbol.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 6c8fbbb..2e7a048 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -651,12 +651,20 @@ bool sym_is_changable(struct symbol *sym)
return sym->visible > sym->rev_dep.tri;
}
+static unsigned strhash(const char *s)
+{
+ /* fnv32 hash */
+ unsigned hash = 2166136261U;
+ for (; *s; s++)
+ hash = (hash ^ *s) * 0x01000193;
+ return hash;
+}
+
struct symbol *sym_lookup(const char *name, int flags)
{
struct symbol *symbol;
- const char *ptr;
char *new_name;
- int hash = 0;
+ int hash;
if (name) {
if (name[0] && !name[1]) {
@@ -666,12 +674,11 @@ struct symbol *sym_lookup(const char *name, int flags)
case 'n': return &symbol_no;
}
}
- for (ptr = name; *ptr; ptr++)
- hash += *ptr;
- hash &= 0xff;
+ hash = strhash(name) % SYMBOL_HASHSIZE;
for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
- if (!strcmp(symbol->name, name) &&
+ if (symbol->name &&
+ !strcmp(symbol->name, name) &&
(flags ? symbol->flags & flags
: !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
return symbol;
@@ -679,7 +686,7 @@ struct symbol *sym_lookup(const char *name, int flags)
new_name = strdup(name);
} else {
new_name = NULL;
- hash = 256;
+ hash = 0;
}
symbol = malloc(sizeof(*symbol));
@@ -697,7 +704,6 @@ struct symbol *sym_lookup(const char *name, int flags)
struct symbol *sym_find(const char *name)
{
struct symbol *symbol = NULL;
- const char *ptr;
int hash = 0;
if (!name)
@@ -710,12 +716,11 @@ struct symbol *sym_find(const char *name)
case 'n': return &symbol_no;
}
}
- for (ptr = name; *ptr; ptr++)
- hash += *ptr;
- hash &= 0xff;
+ hash = strhash(name) % SYMBOL_HASHSIZE;
for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
- if (!strcmp(symbol->name, name) &&
+ if (symbol->name &&
+ !strcmp(symbol->name, name) &&
!(symbol->flags & SYMBOL_CONST))
break;
}
@@ -750,6 +755,7 @@ struct symbol **sym_re_search(const char *pattern)
return NULL;
}
}
+ sym_calc_value(sym);
sym_arr[cnt++] = sym;
}
if (sym_arr)

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