Import sources from 2011-03-30 iso image

1 files changed, 71 insertions, 0 deletions

diff --git a/sys/src/cmd/unix/drawterm/libc/runevsmprint.c b/sys/src/cmd/unix/drawterm/libc/runevsmprint.c
new file mode 100755
index 000000000..6d391e2f6
--- /dev/null
+++ b/sys/src/cmd/unix/drawterm/libc/runevsmprint.c
@@ -0,0 +1,71 @@
+#include <u.h>
+#include <libc.h>
+#include "fmtdef.h"
+
+static int
+runeFmtStrFlush(Fmt *f)
+{
+	Rune *s;
+	int n;
+
+	if(f->start == nil)
+		return 0;
+	n = (uintptr)f->farg;
+	n *= 2;
+	s = (Rune*)f->start;
+	f->start = realloc(s, sizeof(Rune)*n);
+	if(f->start == nil){
+		f->farg = nil;
+		f->to = nil;
+		f->stop = nil;
+		free(s);
+		return 0;
+	}
+	f->farg = (void*)(uintptr)n;
+	f->to = (Rune*)f->start + ((Rune*)f->to - s);
+	f->stop = (Rune*)f->start + n - 1;
+	return 1;
+}
+
+int
+runefmtstrinit(Fmt *f)
+{
+	int n;
+
+	memset(f, 0, sizeof *f);
+	f->runes = 1;
+	n = 32;
+	f->start = malloc(sizeof(Rune)*n);
+	if(f->start == nil)
+		return -1;
+	f->to = f->start;
+	f->stop = (Rune*)f->start + n - 1;
+	f->flush = runeFmtStrFlush;
+	f->farg = (void*)(uintptr)n;
+	f->nfmt = 0;
+	return 0;
+}
+
+/*
+ * print into an allocated string buffer
+ */
+Rune*
+runevsmprint(char *fmt, va_list args)
+{
+	Fmt f;
+	int n;
+
+	if(runefmtstrinit(&f) < 0)
+		return nil;
+	VA_COPY(f.args,args);
+	n = dofmt(&f, fmt);
+	VA_END(f.args);
+	if(f.start == nil)
+		return nil;
+	if(n < 0){
+		free(f.start);
+		return nil;
+	}
+	*(Rune*)f.to = '\0';
+	return (Rune*)f.start;
+}