diff options
| -rw-r--r-- | src/afl-common.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/src/afl-common.c b/src/afl-common.c index 0b38b222..531753c2 100644 --- a/src/afl-common.c +++ b/src/afl-common.c @@ -551,6 +551,8 @@ static int string_distance_levenshtein(char *s1, char *s2) { #undef HELPER_MIN3 +#define ENV_SIMILARITY_TRESHOLD 3 + void print_suggested_envs(char *mispelled_env) { size_t env_name_len = @@ -559,20 +561,28 @@ void print_suggested_envs(char *mispelled_env) { memcpy(env_name, mispelled_env + 4, env_name_len); char *seen = ck_alloc(sizeof(afl_environment_variables) / sizeof(char *)); + int found = 0; int j; for (j = 0; afl_environment_variables[j] != NULL; ++j) { char *afl_env = afl_environment_variables[j] + 4; - int distance = string_distance_levenshtein(afl_env, env_name); - if (distance <= 3 && seen[j] == 0) { + if (distance < ENV_SIMILARITY_TRESHOLD && seen[j] == 0) { SAYF("Did you mean %s?\n", afl_environment_variables[j]); seen[j] = 1; + found = 1; } + + } + + if (found) goto cleanup; + + for (j = 0; afl_environment_variables[j] != NULL; ++j) { + char *afl_env = afl_environment_variables[j] + 4; size_t afl_env_len = strlen(afl_env); char * reduced = ck_alloc(afl_env_len + 1); @@ -586,10 +596,11 @@ void print_suggested_envs(char *mispelled_env) { reduced[afl_env_len - end + start] = 0; int distance = string_distance_levenshtein(reduced, env_name); - if (distance <= 3 && seen[j] == 0) { + if (distance < ENV_SIMILARITY_TRESHOLD && seen[j] == 0) { SAYF("Did you mean %s?\n", afl_environment_variables[j]); seen[j] = 1; + found = 1; } @@ -599,6 +610,8 @@ void print_suggested_envs(char *mispelled_env) { } + if (found) goto cleanup; + char * reduced = ck_alloc(env_name_len + 1); size_t start = 0; while (start < env_name_len) { @@ -613,7 +626,7 @@ void print_suggested_envs(char *mispelled_env) { int distance = string_distance_levenshtein( afl_environment_variables[j] + 4, reduced); - if (distance <= 3 && seen[j] == 0) { + if (distance < ENV_SIMILARITY_TRESHOLD && seen[j] == 0) { SAYF("Did you mean %s?\n", afl_environment_variables[j]); seen[j] = 1; @@ -626,8 +639,10 @@ void print_suggested_envs(char *mispelled_env) { }; - ck_free(env_name); ck_free(reduced); + +cleanup: + ck_free(env_name); ck_free(seen); } |