1 files changed, 98 insertions, 0 deletions
diff --git a/lib/libc/stdio/xprintf_quote.c b/lib/libc/stdio/xprintf_quote.c
new file mode 100644
index 0000000..0edcd30
--- /dev/null
+++ b/lib/libc/stdio/xprintf_quote.c
@@ -0,0 +1,98 @@
+/*-
+ * Copyright (c) 2005 Poul-Henning Kamp
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <namespace.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <wchar.h>
+#include <vis.h>
+#include <assert.h>
+#include <sys/time.h>
+#include "printf.h"
+
+int
+__printf_arginfo_quote(const struct printf_info *pi __unused, size_t n, int *argt)
+{
+
+	assert(n >= 1);
+	argt[0] = PA_POINTER;
+	return (1);
+}
+
+int
+__printf_render_quote(struct __printf_io *io, const struct printf_info *pi __unused, const void *const *arg)
+{
+	const char *str, *p, *t, *o;
+	char r[5];
+	int i, ret;
+
+	str = *((const char *const *)arg[0]);
+	if (str == NULL)
+		return (__printf_out(io, pi, "\"(null)\"", 8));
+	if (*str == '\0')
+		return (__printf_out(io, pi, "\"\"", 2));
+
+	for (i = 0, p = str; *p; p++)
+		if (isspace(*p) || *p == '\\' || *p == '"')
+			i++;
+	if (!i) 
+		return (__printf_out(io, pi, str, strlen(str)));
+	
+	ret = __printf_out(io, pi, "\"", 1);
+	for (t = p = str; *p; p++) {
+		o = NULL;
+		if (*p == '\\')
+			o = "\\\\";
+		else if (*p == '\n')
+			o = "\\n";
+		else if (*p == '\r')
+			o = "\\r";
+		else if (*p == '\t')
+			o = "\\t";
+		else if (*p == ' ')
+			o = " ";
+		else if (*p == '"')
+			o = "\\\"";
+		else if (isspace(*p)) {
+			sprintf(r, "\\%03o", *p);
+			o = r;
+		} else
+			continue;
+		if (p != t)
+			ret += __printf_out(io, pi, t, p - t);
+		ret += __printf_out(io, pi, o, strlen(o));
+		t = p + 1;
+	}
+	if (p != t)
+		ret += __printf_out(io, pi, t, p - t);
+	ret += __printf_out(io, pi, "\"", 1);
+	__printf_flush(io);
+	return(ret);
+}