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-rw-r--r--libc/stdio/printf.c54
1 files changed, 31 insertions, 23 deletions
diff --git a/libc/stdio/printf.c b/libc/stdio/printf.c
index 0d918d698..91b03b31b 100644
--- a/libc/stdio/printf.c
+++ b/libc/stdio/printf.c
@@ -57,7 +57,7 @@
*/
/*
- * Manuel Novoa III Jan 2000
+ * Manuel Novoa III Jan 2001
*
* Removed fake file from *s*printf functions because of possible problems
* if called recursively. Instead, have sprintf, snprintf, and vsprintf
@@ -73,7 +73,11 @@
* Added function fnprintf to support __dtostr.
* Added floating point support for doubles. Yeah!
*
- * TODO: long double support
+ *
+ * May 2001 Fixes from Johan Adolfsson (johan.adolfsson@axis.com)
+ * 1) printf("%c",0) returned 0 instead of 1.
+ * 2) unrolled loop in asprintf to reduce size and remove compile warning.
+ *
*/
/*****************************************************************************/
@@ -155,26 +159,29 @@ int printf(const char *fmt, ...)
int asprintf(char **app, const char *fmt, ...)
{
va_list ptr;
- int rv, i;
- char *p; /* unitialized warning is ok here */
+ int rv;
+ char *p;
+
/*
- * First iteration - find out size of buffer required and allocate it.
- * Second iteration - actually produce output.
+ * First iteration - find out size of buffer required and allocate it.
*/
- rv = 0;
- for (i=0 ; i<2 ; i++) {
- va_strt(ptr, fmt);
- rv = vsnprintf(p, rv, fmt, ptr);
- va_end(ptr);
-
- if (i==0) { /* first time through so */
- p = malloc(++rv); /* allocate the buffer */
- *app = p;
- if (!p) {
- return -1;
- }
- }
+ va_strt(ptr, fmt);
+ rv = vsnprintf(NULL, 0, fmt, ptr);
+ va_end(ptr);
+
+ p = malloc(++rv); /* allocate the buffer */
+ *app = p;
+ if (!p) {
+ return -1;
}
+
+ /*
+ * Second iteration - actually produce output.
+ */
+ va_strt(ptr, fmt);
+ rv = vsnprintf(p, rv, fmt, ptr);
+ va_end(ptr);
+
return rv;
}
#endif
@@ -345,7 +352,7 @@ static const char u_radix[] = "\x02\x08\x10\x10\x10\x0a";
int vfnprintf(FILE * op, size_t max_size, const char *fmt, va_list ap)
{
- int i, cnt, lval;
+ int i, cnt, lval, len;
char *p;
const char *fmt0;
int buffer_mode;
@@ -545,6 +552,9 @@ int vfnprintf(FILE * op, size_t max_size, const char *fmt, va_list ap)
if (*p == 'c') { /* character */
p = tmp;
*p = va_arg(ap, int);
+ /* This takes care of the "%c",0 case */
+ len = 1;
+ goto print_len_set;
} else { /* string */
p = va_arg(ap, char *);
if (!p) {
@@ -576,11 +586,9 @@ int vfnprintf(FILE * op, size_t max_size, const char *fmt, va_list ap)
print:
#endif
{ /* this used to be printfield */
- int len;
-
/* cheaper than strlen call */
for ( len = 0 ; p[len] ; len++ ) { }
-
+ print_len_set:
if ((*p == '-')
#if WANT_GNU_ERRNO
&& (*fmt != 'm')