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[libc] Add support for "%lc" and "%ls" format specifiers

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-07-19 13:57:17 +01:00
parent 7ad6caf29f
commit 58ed3b1cee
2 changed files with 32 additions and 5 deletions
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36
src/core/vsprintf.c
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@ -22,6 +22,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
#include <wchar.h>
#include <ipxe/vsprintf.h>
/** @file */
@ -185,6 +186,7 @@ size_t vcprintf ( struct printf_context *ctx, const char *fmt, va_list args ) {
char *ptr;
char tmp_buf[32]; /* 32 is enough for all numerical formats.
* Insane width fields could overflow this buffer. */
wchar_t *wptr;
/* Initialise context */
ctx->len = 0;
@ -234,11 +236,26 @@ size_t vcprintf ( struct printf_context *ctx, const char *fmt, va_list args ) {
/* Process conversion specifier */
ptr = tmp_buf + sizeof ( tmp_buf ) - 1;
*ptr = '\0';
wptr = NULL;
if ( *fmt == 'c' ) {
cputchar ( ctx, va_arg ( args, unsigned int ) );
if ( length < &type_sizes[LONG_LEN] ) {
cputchar ( ctx, va_arg ( args, unsigned int ) );
} else {
wchar_t wc;
size_t len;
wc = va_arg ( args, wint_t );
len = wcrtomb ( tmp_buf, wc, NULL );
tmp_buf[len] = '\0';
ptr = tmp_buf;
}
} else if ( *fmt == 's' ) {
ptr = va_arg ( args, char * );
if ( ! ptr )
if ( length < &type_sizes[LONG_LEN] ) {
ptr = va_arg ( args, char * );
} else {
wptr = va_arg ( args, wchar_t * );
}
if ( ( ptr == NULL ) && ( wptr == NULL ) )
ptr = "<NULL>";
} else if ( *fmt == 'p' ) {
intptr_t ptrval;
@ -271,8 +288,17 @@ size_t vcprintf ( struct printf_context *ctx, const char *fmt, va_list args ) {
*(--ptr) = *fmt;
}
/* Write out conversion result */
for ( ; *ptr ; ptr++ ) {
cputchar ( ctx, *ptr );
if ( wptr == NULL ) {
for ( ; *ptr ; ptr++ ) {
cputchar ( ctx, *ptr );
}
} else {
for ( ; *wptr ; wptr++ ) {
size_t len = wcrtomb ( tmp_buf, *wptr, NULL );
for ( ptr = tmp_buf ; len-- ; ptr++ ) {
cputchar ( ctx, *ptr );
}
}
}
}

1
src/include/stddef.h
View File

@ -26,5 +26,6 @@ FILE_LICENCE ( GPL2_ONLY );
#define __WCHAR_TYPE__ long int
#endif
typedef __WCHAR_TYPE__ wchar_t;
typedef __WINT_TYPE__ wint_t;
#endif /* STDDEF_H */