diff options
Diffstat (limited to 'scripts/kconfig/symbol.c')
| -rw-r--r-- | scripts/kconfig/symbol.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c index 6c8fbbb66ebc..2e7a048e0cfc 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) |
