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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-06 16:06:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-06 16:06:25 -0700
commit0f9bfa569d46f2346a53a940b2b9e49a38635732 (patch)
treeca301743d54bc7f4e0fea3f541db1b23768f9934
parent1b40a895df6c7d5a80e71f65674060b03d84bbef (diff)
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.c57
1 files changed, 31 insertions, 26 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 6021757a449..926c7e00e2d 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':