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| author | Joe Perches <joe@perches.com> | 2010-03-06 17:10:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 17:47:45 -0800 |
| commit | ef0658f3de484bf9b173639cd47544584e01efa5 (patch) | |
| tree | d9d6c569b2c79fb9cf240783a409722cc9264886 | |
| parent | 7bc80cd935a4d5fd8574f6994bd95d0aad273d56 (diff) | |
| download | linux-ef0658f3de484bf9b173639cd47544584e01efa5.tar.bz2 | |
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>
| -rw-r--r-- | lib/vsprintf.c | 22 |
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); |