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At least cope with "%llx" by reading the correct-sized va_arg from the

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stack, even if we don't yet print it out.

At some point, vsprintf() needs to be fixed up so that it can correctly
cope with limited-sized buffers (i.e. vsnprintf), long longs, and
standard format specifiers (e.g. "%04x").  We should also remove the
special types (MAC addresses and IP addresses).  This would then enable
us to use gcc's ability to type-check printf format strings.
This commit is contained in:
Michael Brown 2006-05-13 11:50:52 +00:00
parent 21493646c2
commit f99e7a375e
1 changed files with 16 additions and 7 deletions
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23
src/core/vsprintf.c
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@ -5,10 +5,11 @@
#include "errno.h"
#include "vsprintf.h"
#define LONG_SHIFT ((int)((sizeof(unsigned long)*CHAR_BIT) - 4))
#define INT_SHIFT ((int)((sizeof(unsigned int)*CHAR_BIT) - 4))
#define SHRT_SHIFT ((int)((sizeof(unsigned short)*CHAR_BIT) - 4))
#define CHAR_SHIFT ((int)((sizeof(unsigned char)*CHAR_BIT) - 4))
#define LONGLONG_SHIFT ((int)((sizeof(unsigned long long)*CHAR_BIT) - 4))
#define LONG_SHIFT ((int)((sizeof(unsigned long)*CHAR_BIT) - 4))
#define INT_SHIFT ((int)((sizeof(unsigned int)*CHAR_BIT) - 4))
#define SHRT_SHIFT ((int)((sizeof(unsigned short)*CHAR_BIT) - 4))
#define CHAR_SHIFT ((int)((sizeof(unsigned char)*CHAR_BIT) - 4))
/** @file */
@ -62,7 +63,11 @@ static int vsprintf(char *buf, const char *fmt, va_list args)
shift = LONG_SHIFT;
fmt++;
}
else if (*fmt == 'h') {
if (*fmt == 'l') {
shift = LONGLONG_SHIFT;
fmt++;
}
if (*fmt == 'h') {
shift = SHRT_SHIFT;
fmt++;
if (*fmt == 'h') {
@ -79,7 +84,9 @@ static int vsprintf(char *buf, const char *fmt, va_list args)
/* With x86 gcc, sizeof(long) == sizeof(int) */
unsigned long h;
int ncase;
if (shift > INT_SHIFT) {
if (shift > LONG_SHIFT) {
h = va_arg(args, unsigned long long);
} else if (shift > INT_SHIFT) {
h = va_arg(args, unsigned long);
} else {
h = va_arg(args, unsigned int);
@ -95,7 +102,9 @@ static int vsprintf(char *buf, const char *fmt, va_list args)
else if (*fmt == 'd') {
char *r, *t;
long i;
if (shift > INT_SHIFT) {
if (shift > LONG_SHIFT) {
i = va_arg(args, long long);
} else if (shift > INT_SHIFT) {
i = va_arg(args, long);
} else {
i = va_arg(args, int);