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authorDenys Vlasenko2010-09-07 12:19:33 +0200
committerDenys Vlasenko2010-09-07 12:19:33 +0200
commit8b2f13d84def87b4ebd0901bf0c3157bc1f6dee3 (patch)
tree0bf072d3612c77dd8b0720973e46e8dbc37a040a
parent27c56f12670295286a881bbb87d506f0a5bfd40e (diff)
downloadbusybox-8b2f13d84def87b4ebd0901bf0c3157bc1f6dee3.zip
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shell: unify endofname() in hush and ash
function old new delta builtin_umask 132 133 +1 changepath 195 194 -1 expand_and_evaluate_arith 77 69 -8 ash_arith 143 135 -8 expand_one_var 1551 1515 -36 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/4 up/down: 1/-53) Total: -52 bytes Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
-rw-r--r--shell/ash.c42
-rw-r--r--shell/hush.c20
-rw-r--r--shell/math.c14
-rw-r--r--shell/math.h9
4 files changed, 42 insertions, 43 deletions
diff --git a/shell/ash.c b/shell/ash.c
index 273ecab..70425b3 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -1982,10 +1982,6 @@ extern struct globals_var *const ash_ptr_to_globals_var;
# define optindval() (voptind.var_text + 7)
#endif
-
-#define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
-#define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
-
#if ENABLE_ASH_GETOPTS
static void FAST_FUNC
getoptsreset(const char *value)
@@ -1995,24 +1991,26 @@ getoptsreset(const char *value)
}
#endif
+/* math.h has these, otherwise define our private copies */
+#if !ENABLE_SH_MATH_SUPPORT
+#define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
+#define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
/*
- * Return of a legal variable name (a letter or underscore followed by zero or
- * more letters, underscores, and digits).
+ * Return the pointer to the first char which is not part of a legal variable name
+ * (a letter or underscore followed by letters, underscores, and digits).
*/
-static char* FAST_FUNC
+static const char*
endofname(const char *name)
{
- char *p;
-
- p = (char *) name;
- if (!is_name(*p))
- return p;
- while (*++p) {
- if (!is_in_name(*p))
+ if (!is_name(*name))
+ return name;
+ while (*++name) {
+ if (!is_in_name(*name))
break;
}
- return p;
+ return name;
}
+#endif
/*
* Compares two strings up to the first = or '\0'. The first
@@ -2195,9 +2193,10 @@ setvareq(char *s, int flags)
static void
setvar(const char *name, const char *val, int flags)
{
- char *p, *q;
- size_t namelen;
+ const char *q;
+ char *p;
char *nameeq;
+ size_t namelen;
size_t vallen;
q = endofname(name);
@@ -2211,12 +2210,13 @@ setvar(const char *name, const char *val, int flags)
} else {
vallen = strlen(val);
}
+
INT_OFF;
nameeq = ckmalloc(namelen + vallen + 2);
- p = (char *)memcpy(nameeq, name, namelen) + namelen;
+ p = memcpy(nameeq, name, namelen) + namelen;
if (val) {
*p++ = '=';
- p = (char *)memcpy(p, val, vallen) + vallen;
+ p = memcpy(p, val, vallen) + vallen;
}
*p = '\0';
setvareq(nameeq, flags | VNOSAVE);
@@ -5444,7 +5444,7 @@ ash_arith(const char *s)
math_hooks.lookupvar = lookupvar;
math_hooks.setvar = setvar2;
- math_hooks.endofname = endofname;
+ //math_hooks.endofname = endofname;
INT_OFF;
result = arith(s, &errcode, &math_hooks);
@@ -9405,7 +9405,7 @@ evalbltin(const struct builtincmd *cmd, int argc, char **argv)
static int
goodname(const char *p)
{
- return !*endofname(p);
+ return endofname(p)[0] == '\0';
}
diff --git a/shell/hush.c b/shell/hush.c
index ae2876a..3e8c387 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1671,24 +1671,6 @@ static void unset_vars(char **strings)
free(strings);
}
-#if ENABLE_SH_MATH_SUPPORT
-# define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
-# define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
-static char* FAST_FUNC endofname(const char *name)
-{
- char *p;
-
- p = (char *) name;
- if (!is_name(*p))
- return p;
- while (*++p) {
- if (!is_in_name(*p))
- break;
- }
- return p;
-}
-#endif
-
static void FAST_FUNC set_local_var_from_halves(const char *name, const char *val)
{
char *var = xasprintf("%s=%s", name, val);
@@ -4446,7 +4428,7 @@ static arith_t expand_and_evaluate_arith(const char *arg, int *errcode_p)
hooks.lookupvar = get_local_var_value;
hooks.setvar = set_local_var_from_halves;
- hooks.endofname = endofname;
+ //hooks.endofname = endofname;
exp_str = expand_pseudo_dquoted(arg);
res = arith(exp_str ? exp_str : arg, errcode_p, &hooks);
free(exp_str);
diff --git a/shell/math.c b/shell/math.c
index f0cc2e3..a4c55a4 100644
--- a/shell/math.c
+++ b/shell/math.c
@@ -122,7 +122,7 @@
#define a_e_h_t arith_eval_hooks_t
#define lookupvar (math_hooks->lookupvar)
#define setvar (math_hooks->setvar )
-#define endofname (math_hooks->endofname)
+//#define endofname (math_hooks->endofname)
#define arith_isspace(arithval) \
(arithval == ' ' || arithval == '\n' || arithval == '\t')
@@ -479,6 +479,18 @@ static const char op_tokens[] ALIGN1 = {
/* ptr to ")" */
#define endexpression (&op_tokens[sizeof(op_tokens)-7])
+const char* FAST_FUNC
+endofname(const char *name)
+{
+ if (!is_name(*name))
+ return name;
+ while (*++name) {
+ if (!is_in_name(*name))
+ break;
+ }
+ return name;
+}
+
arith_t
arith(const char *expr, int *perrcode, a_e_h_t *math_hooks)
{
diff --git a/shell/math.h b/shell/math.h
index 2b0b2b8..96088b4 100644
--- a/shell/math.h
+++ b/shell/math.h
@@ -87,14 +87,19 @@ typedef long arith_t;
#define strto_arith_t strtoul
#endif
+/* ash's and hush's endofname is the same, so... */
+# define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
+# define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
+const char* FAST_FUNC endofname(const char *name);
+
typedef const char* FAST_FUNC (*arith_var_lookup_t)(const char *name);
typedef void FAST_FUNC (*arith_var_set_t)(const char *name, const char *val);
-typedef char* FAST_FUNC (*arith_var_endofname_t)(const char *name);
+//typedef const char* FAST_FUNC (*arith_var_endofname_t)(const char *name);
typedef struct arith_eval_hooks {
arith_var_lookup_t lookupvar;
arith_var_set_t setvar;
- arith_var_endofname_t endofname;
+// arith_var_endofname_t endofname;
} arith_eval_hooks_t;
arith_t arith(const char *expr, int *perrcode, arith_eval_hooks_t*);