Add support for the field width to be specified as an argument by using
the '*' modifier. See the POSIX.1 specification for more details on
conformance at
http://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html
This change make the following calls equivalent:
printf("%6s\n", "test");
printf("%*s\n", 6, "test");
Signed-off-by: Doug Goldstein <car...@cardoe.com>
---
src/core/vsprintf.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/core/vsprintf.c b/src/core/vsprintf.c
index 9d3a97c..f9a6772 100644
--- a/src/core/vsprintf.c
+++ b/src/core/vsprintf.c
@@ -218,7 +218,9 @@ size_t vcprintf ( struct printf_context *ctx, const char
*fmt, va_list args ) {
/* Process field width */
width = 0;
for ( ; ; fmt++ ) {
- if ( ( ( unsigned ) ( *fmt - '0' ) ) < 10 ) {
+ if ( *fmt == '*' ) {
+ width = va_arg(args, int);
+ } else if ( ( ( unsigned ) ( *fmt - '0' ) ) < 10 ) {
width = ( width * 10 ) + ( *fmt - '0' );
} else {
break;
--
2.7.4
_______________________________________________
ipxe-devel mailing list
ipxe-devel@lists.ipxe.org
https://lists.ipxe.org/mailman/listinfo.cgi/ipxe-devel
