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printf: accept negative numbers for %x; sh: overflowed numbers are 0

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-06-05 16:24:29 +02:00
parent 0f952c249e
commit 71016baf55
3 changed files with 16 additions and 4 deletions
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8
coreutils/printf.c
View File

@ -78,6 +78,14 @@ static int multiconvert(const char *arg, void *result, converter convert)
static void FAST_FUNC conv_strtoull(const char *arg, void *result) static void FAST_FUNC conv_strtoull(const char *arg, void *result)
{ {
*(unsigned long long*)result = bb_strtoull(arg, NULL, 0); *(unsigned long long*)result = bb_strtoull(arg, NULL, 0);
/* both coreutils 6.10 and bash 3.2:
* $ printf '%x\n' -2
* fffffffffffffffe
* Mimic that:
*/
if (errno) {
*(unsigned long long*)result = bb_strtoll(arg, NULL, 0);
}
} }
static void FAST_FUNC conv_strtoll(const char *arg, void *result) static void FAST_FUNC conv_strtoll(const char *arg, void *result)
{ {

8
shell/math.c
View File

@ -562,7 +562,11 @@ arith(const char *expr, int *perrcode, a_e_h_t *math_hooks)
} }
if (isdigit(arithval)) { if (isdigit(arithval)) {
numstackptr->var = NULL; numstackptr->var = NULL;
errno = 0;
/* call strtoul[l]: */
numstackptr->val = strto_arith_t(expr, (char **) &expr, 0); numstackptr->val = strto_arith_t(expr, (char **) &expr, 0);
if (errno)
numstackptr->val = 0; /* bash compat */
goto num; goto num;
} }
for (p = op_tokens; ; p++) { for (p = op_tokens; ; p++) {
@ -592,7 +596,7 @@ arith(const char *expr, int *perrcode, a_e_h_t *math_hooks)
lasttok = TOK_NUM; lasttok = TOK_NUM;
/* Plus and minus are binary (not unary) _only_ if the last /* Plus and minus are binary (not unary) _only_ if the last
* token was as number, or a right paren (which pretends to be * token was a number, or a right paren (which pretends to be
* a number, since it evaluates to one). Think about it. * a number, since it evaluates to one). Think about it.
* It makes sense. */ * It makes sense. */
if (lasttok != TOK_NUM) { if (lasttok != TOK_NUM) {
@ -611,7 +615,7 @@ arith(const char *expr, int *perrcode, a_e_h_t *math_hooks)
break; break;
} }
} }
/* We don't want a unary operator to cause recursive descent on the /* We don't want an unary operator to cause recursive descent on the
* stack, because there can be many in a row and it could cause an * stack, because there can be many in a row and it could cause an
* operator to be evaluated before its argument is pushed onto the * operator to be evaluated before its argument is pushed onto the
* integer stack. */ * integer stack. */

4
shell/math.h
View File

@ -80,11 +80,11 @@ PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
#if ENABLE_SH_MATH_SUPPORT_64 #if ENABLE_SH_MATH_SUPPORT_64
typedef long long arith_t; typedef long long arith_t;
#define arith_t_fmt "%lld" #define arith_t_fmt "%lld"
#define strto_arith_t strtoll #define strto_arith_t strtoull
#else #else
typedef long arith_t; typedef long arith_t;
#define arith_t_fmt "%ld" #define arith_t_fmt "%ld"
#define strto_arith_t strtol #define strto_arith_t strtoul
#endif #endif
typedef const char *(*arith_var_lookup_t)(const char *name); typedef const char *(*arith_var_lookup_t)(const char *name);