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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-06 23:06:25 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-06 23:06:25 (GMT) |
commit | 0f9bfa569d46f2346a53a940b2b9e49a38635732 (patch) | |
tree | ca301743d54bc7f4e0fea3f541db1b23768f9934 | |
parent | 1b40a895df6c7d5a80e71f65674060b03d84bbef (diff) | |
download | linux-0f9bfa569d46f2346a53a940b2b9e49a38635732.tar.xz |
vsprintf: split out '%s' handling logic
The actual code is the same, just split out into a helper function.
This makes it easier to read, and allows for future sharing of the
string code.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | lib/vsprintf.c | 57 |
1 files changed, 31 insertions, 26 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 6021757..926c7e0 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -482,6 +482,35 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int return buf; } +static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags) +{ + int len, i; + + if ((unsigned long)s < PAGE_SIZE) + s = "<NULL>"; + + len = strnlen(s, precision); + + if (!(flags & LEFT)) { + while (len < field_width--) { + if (buf < end) + *buf = ' '; + ++buf; + } + } + for (i = 0; i < len; ++i) { + if (buf < end) + *buf = *s; + ++buf; ++s; + } + while (len < field_width--) { + if (buf < end) + *buf = ' '; + ++buf; + } + return buf; +} + /** * vsnprintf - Format a string and place it in a buffer * @buf: The buffer to place the result into @@ -502,11 +531,9 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int */ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) { - int len; unsigned long long num; - int i, base; + int base; char *str, *end, c; - const char *s; int flags; /* flags to number() */ @@ -622,29 +649,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) continue; case 's': - s = va_arg(args, char *); - if ((unsigned long)s < PAGE_SIZE) - s = "<NULL>"; - - len = strnlen(s, precision); - - if (!(flags & LEFT)) { - while (len < field_width--) { - if (str < end) - *str = ' '; - ++str; - } - } - for (i = 0; i < len; ++i) { - if (str < end) - *str = *s; - ++str; ++s; - } - while (len < field_width--) { - if (str < end) - *str = ' '; - ++str; - } + str = string(str, end, va_arg(args, char *), field_width, precision, flags); continue; case 'p': |