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authorDenys Vlasenko2009-09-12 14:47:41 +0200
committerDenys Vlasenko2009-09-12 14:47:41 +0200
commit873273da94734fda1902b385d7f3e39daf675e35 (patch)
tree69e6db3e11ee5df46556cf74fe785fb798c88459
parent3a0f6f23286ad4352830613c6a8aea1bd56ca2d2 (diff)
downloadbusybox-873273da94734fda1902b385d7f3e39daf675e35.zip
busybox-873273da94734fda1902b385d7f3e39daf675e35.tar.gz
hush: code shrink by Dan Fandrich (dan AT coneharvesters.com)
function old new delta find_function_slot - 47 +47 run_list 2508 2491 -17 find_function 40 8 -32 builtin_unset 227 165 -62 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--shell/hush.c74
1 files changed, 35 insertions, 39 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 30eddad..a02a487 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -3079,15 +3079,21 @@ static const struct built_in_command* find_builtin(const char *name)
}
#if ENABLE_HUSH_FUNCTIONS
-static const struct function *find_function(const char *name)
+static struct function **find_function_slot(const char *name)
{
- const struct function *funcp = G.top_func;
- while (funcp) {
- if (strcmp(name, funcp->name) == 0) {
+ struct function **funcpp = &G.top_func;
+ while (*funcpp) {
+ if (strcmp(name, (*funcpp)->name) == 0) {
break;
}
- funcp = funcp->next;
+ funcpp = &(*funcpp)->next;
}
+ return funcpp;
+}
+
+static const struct function *find_function(const char *name)
+{
+ const struct function *funcp = *find_function_slot(name);
if (funcp)
debug_printf_exec("found function '%s'\n", name);
return funcp;
@@ -3096,18 +3102,11 @@ static const struct function *find_function(const char *name)
/* Note: takes ownership on name ptr */
static struct function *new_function(char *name)
{
- struct function *funcp;
- struct function **funcpp = &G.top_func;
-
- while ((funcp = *funcpp) != NULL) {
- struct command *cmd;
-
- if (strcmp(funcp->name, name) != 0) {
- funcpp = &funcp->next;
- continue;
- }
+ struct function **funcpp = find_function_slot(name);
+ struct function *funcp = *funcpp;
- cmd = funcp->parent_cmd;
+ if (funcp != NULL) {
+ struct command *cmd = funcp->parent_cmd;
debug_printf_exec("func %p parent_cmd %p\n", funcp, cmd);
if (!cmd) {
debug_printf_exec("freeing & replacing function '%s'\n", funcp->name);
@@ -3129,39 +3128,36 @@ static struct function *new_function(char *name)
cmd->group_as_string = funcp->body_as_string;
# endif
}
- goto skip;
+ } else {
+ debug_printf_exec("remembering new function '%s'\n", name);
+ funcp = *funcpp = xzalloc(sizeof(*funcp));
+ /*funcp->next = NULL;*/
}
- debug_printf_exec("remembering new function '%s'\n", name);
- funcp = *funcpp = xzalloc(sizeof(*funcp));
- /*funcp->next = NULL;*/
- skip:
+
funcp->name = name;
return funcp;
}
static void unset_func(const char *name)
{
- struct function *funcp;
- struct function **funcpp = &G.top_func;
-
- while ((funcp = *funcpp) != NULL) {
- if (strcmp(funcp->name, name) == 0) {
- *funcpp = funcp->next;
- /* funcp is unlinked now, deleting it.
- * Note: if !funcp->body, the function was created by
- * "-F name body", do not free ->body_as_string
- * and ->name as they were not malloced. */
- if (funcp->body) {
- free_pipe_list(funcp->body);
- free(funcp->name);
+ struct function **funcpp = find_function_slot(name);
+ struct function *funcp = *funcpp;
+
+ if (funcp != NULL) {
+ debug_printf_exec("freeing function '%s'\n", funcp->name);
+ *funcpp = funcp->next;
+ /* funcp is unlinked now, deleting it.
+ * Note: if !funcp->body, the function was created by
+ * "-F name body", do not free ->body_as_string
+ * and ->name as they were not malloced. */
+ if (funcp->body) {
+ free_pipe_list(funcp->body);
+ free(funcp->name);
# if !BB_MMU
- free(funcp->body_as_string);
+ free(funcp->body_as_string);
# endif
- }
- free(funcp);
- break;
}
- funcpp = &funcp->next;
+ free(funcp);
}
}