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authorRich Felker <dalias@aerifal.cx>2011-03-18 09:19:09 -0400
committerRich Felker <dalias@aerifal.cx>2011-03-18 09:19:09 -0400
commite18b56382154fe1c5803f6b9ee36e2991174c037 (patch)
tree0ae6c98f68e5931c542a7fbc2604315593830348 /src
parentc35bb6645f32bc684dc3da99d4d71c4ead2d4717 (diff)
downloadmusl-e18b56382154fe1c5803f6b9ee36e2991174c037.tar.gz
implement [v]swprintf
Diffstat (limited to 'src')
-rw-r--r--src/internal/stdio_impl.h2
-rw-r--r--src/stdio/swprintf.c14
-rw-r--r--src/stdio/vswprintf.c46
3 files changed, 61 insertions, 1 deletions
diff --git a/src/internal/stdio_impl.h b/src/internal/stdio_impl.h
index 13e5cfd9..4e6d3503 100644
--- a/src/internal/stdio_impl.h
+++ b/src/internal/stdio_impl.h
@@ -50,7 +50,7 @@ struct __FILE_s {
signed char lbf;
int lock;
int lockcount;
- void *dummy5;
+ void *cookie;
off_t off;
int (*flush)(FILE *);
void **wide_data; /* must be NULL */
diff --git a/src/stdio/swprintf.c b/src/stdio/swprintf.c
new file mode 100644
index 00000000..5ece97c4
--- /dev/null
+++ b/src/stdio/swprintf.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <wchar.h>
+
+int swprintf(wchar_t *s, size_t n, const wchar_t *fmt, ...)
+{
+ int ret;
+ va_list ap;
+ va_start(ap, fmt);
+ ret = vswprintf(s, n, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+
diff --git a/src/stdio/vswprintf.c b/src/stdio/vswprintf.c
new file mode 100644
index 00000000..4ad581fb
--- /dev/null
+++ b/src/stdio/vswprintf.c
@@ -0,0 +1,46 @@
+#include "stdio_impl.h"
+
+struct cookie {
+ wchar_t *ws;
+ size_t l;
+};
+
+static size_t sw_write(FILE *f, const unsigned char *s, size_t l)
+{
+ size_t l0 = l;
+ int i = 0;
+ struct cookie *c = f->cookie;
+ while (c->l && l && (i=mbtowc(c->ws, s, l))>=0) {
+ s+=i;
+ l-=i;
+ c->l--;
+ c->ws++;
+ }
+ *c->ws = 0;
+ return i<0 ? i : l0;
+}
+
+int vswprintf(wchar_t *s, size_t n, const wchar_t *fmt, va_list ap)
+{
+ int r;
+ FILE f;
+ unsigned char buf[256];
+ struct cookie c = { s, n-1 };
+
+ memset(&f, 0, sizeof(FILE));
+ f.lbf = EOF;
+ f.write = sw_write;
+ f.buf_size = sizeof buf;
+ f.buf = buf;
+ f.owner = -1;
+ f.cookie = &c;
+ if (!n) {
+ return -1;
+ } else if (n > INT_MAX) {
+ errno = EOVERFLOW;
+ return -1;
+ }
+ r = vfwprintf(&f, fmt, ap);
+ __oflow(&f);
+ return r>=n ? -1 : r;
+}