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authorJoe Perches <joe@perches.com>2010-03-06 17:10:14 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-06 17:47:45 -0800
commitef0658f3de484bf9b173639cd47544584e01efa5 (patch)
treed9d6c569b2c79fb9cf240783a409722cc9264886 /lib
parent7bc80cd935a4d5fd8574f6994bd95d0aad273d56 (diff)
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vsprintf.c: Reduce sizeof struct printf_spec from 24 to 8 bytes
Reducing the size of struct printf_spec is a good thing because multiple instances are commonly passed on stack. It's possible for type to be u8 and field_width to be s8, but this is likely small enough for now. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/vsprintf.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index af4aaa6c36f3..e994cea385c8 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -408,12 +408,12 @@ enum format_type {
};
struct printf_spec {
- enum format_type type;
- int flags; /* flags to number() */
- int field_width; /* width of output field */
- int base;
- int precision; /* # of digits/chars */
- int qualifier;
+ u16 type;
+ s16 field_width; /* width of output field */
+ u8 flags; /* flags to number() */
+ u8 base;
+ s8 precision; /* # of digits/chars */
+ u8 qualifier;
};
static char *number(char *buf, char *end, unsigned long long num,
@@ -1333,7 +1333,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
break;
case FORMAT_TYPE_NRCHARS: {
- int qualifier = spec.qualifier;
+ u8 qualifier = spec.qualifier;
if (qualifier == 'l') {
long *ip = va_arg(args, long *);
@@ -1619,7 +1619,7 @@ do { \
case FORMAT_TYPE_NRCHARS: {
/* skip %n 's argument */
- int qualifier = spec.qualifier;
+ u8 qualifier = spec.qualifier;
void *skip_arg;
if (qualifier == 'l')
skip_arg = va_arg(args, long *);
@@ -1885,7 +1885,9 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
char *next;
char digit;
int num = 0;
- int qualifier, base, field_width;
+ u8 qualifier;
+ u8 base;
+ s16 field_width;
bool is_sign;
while (*fmt && *str) {
@@ -1963,7 +1965,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
{
char *s = (char *)va_arg(args, char *);
if (field_width == -1)
- field_width = INT_MAX;
+ field_width = SHORT_MAX;
/* first, skip leading white space in buffer */
str = skip_spaces(str);