1 files changed, 154 insertions, 0 deletions
diff --git a/lib/printf/glue.c b/lib/printf/glue.c
new file mode 100644
index 0000000000..6b6e17daff
--- /dev/null
+++ b/lib/printf/glue.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2019  David Lamparter, for NetDEF, Inc.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+#include <string.h>
+
+#include "printfrr.h"
+
+ssize_t bprintfrr(struct fbuf *out, const char *fmt, ...)
+{
+	ssize_t ret;
+	va_list ap;
+
+	va_start(ap, fmt);
+	ret = vbprintfrr(out, fmt, ap);
+	va_end(ap);
+	return ret;
+}
+
+ssize_t vsnprintfrr(char *out, size_t outsz, const char *fmt, va_list ap)
+{
+	struct fbuf fbb = { .buf = out, .pos = out, .len = outsz - 1, };
+	struct fbuf *fb = (out && outsz) ? &fbb : NULL;
+	ssize_t ret;
+
+	ret = vbprintfrr(fb, fmt, ap);
+	if (fb)
+		fb->pos[0] = '\0';
+	return ret;
+}
+
+ssize_t snprintfrr(char *out, size_t outsz, const char *fmt, ...)
+{
+	struct fbuf fbb = { .buf = out, .pos = out, .len = outsz - 1, };
+	struct fbuf *fb = (out && outsz) ? &fbb : NULL;
+	ssize_t ret;
+	va_list ap;
+
+	va_start(ap, fmt);
+	ret = vbprintfrr(fb, fmt, ap);
+	va_end(ap);
+	if (fb)
+		fb->pos[0] = '\0';
+	return ret;
+}
+
+ssize_t vcsnprintfrr(char *out, size_t outsz, const char *fmt, va_list ap)
+{
+	if (!out || !outsz)
+		return vbprintfrr(NULL, fmt, ap);
+
+	struct fbuf fbb = { .buf = out, .pos = out, .len = outsz - 1, };
+	ssize_t ret;
+	size_t pos;
+
+	pos = strnlen(out, outsz);
+	fbb.pos += pos;
+
+	ret = vbprintfrr(&fbb, fmt, ap);
+	fbb.pos[0] = '\0';
+	return ret >= 0 ? ret + (ssize_t)pos : ret;
+}
+
+ssize_t csnprintfrr(char *out, size_t outsz, const char *fmt, ...)
+{
+	ssize_t ret;
+	va_list ap;
+
+	va_start(ap, fmt);
+	ret = vcsnprintfrr(out, outsz, fmt, ap);
+	va_end(ap);
+	return ret;
+}
+
+char *vasnprintfrr(struct memtype *mt, char *out, size_t outsz, const char *fmt,
+		   va_list ap)
+{
+	struct fbuf fb = { .buf = out, .pos = out, .len = outsz - 1, };
+	ssize_t len;
+	va_list ap2;
+	char *ret = out;
+
+	va_copy(ap2, ap);
+	len = vbprintfrr(&fb, fmt, ap);
+	if (len < 0)
+		/* error = malformed format string => try something useful */
+		return qstrdup(mt, fmt);
+
+	if ((size_t)len >= outsz - 1) {
+		ret = qmalloc(mt, len + 1);
+		fb.buf = fb.pos = ret;
+		fb.len = len;
+
+		vbprintfrr(&fb, fmt, ap2);
+	}
+	ret[len] = '\0';
+	return ret;
+}
+
+char *asnprintfrr(struct memtype *mt, char *out, size_t outsz, const char *fmt,
+		  ...)
+{
+	va_list ap;
+	char *ret;
+
+	va_start(ap, fmt);
+	ret = vasnprintfrr(mt, out, outsz, fmt, ap);
+	va_end(ap);
+	return ret;
+}
+
+char *vasprintfrr(struct memtype *mt, const char *fmt, va_list ap)
+{
+	char buf[256];
+	char *ret;
+
+	ret = vasnprintfrr(mt, buf, sizeof(buf), fmt, ap);
+
+	if (ret == buf)
+		ret = qstrdup(mt, ret);
+	return ret;
+}
+
+char *asprintfrr(struct memtype *mt, const char *fmt, ...)
+{
+	char buf[256];
+	va_list ap;
+	char *ret;
+
+	va_start(ap, fmt);
+	ret = vasnprintfrr(mt, buf, sizeof(buf), fmt, ap);
+	va_end(ap);
+
+	if (ret == buf)
+		ret = qstrdup(mt, ret);
+	return ret;
+}