1 files changed, 103 insertions, 0 deletions
diff --git a/dyxlat.c b/dyxlat.c
new file mode 100644
index 00000000..ef6bef4f
--- /dev/null
+++ b/dyxlat.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2017 The strace developers.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
+ */
+
+#include "defs.h"
+
+struct dyxlat {
+	size_t used;
+	size_t allocated;
+	struct xlat *xlat;
+};
+
+#define MARK_END(xlat)				\
+	do {					\
+		(xlat).val = 0;			\
+		(xlat).str = 0;			\
+	} while (0)
+
+struct dyxlat *
+dyxlat_alloc(const size_t nmemb)
+{
+	struct dyxlat *const dyxlat = xmalloc(sizeof(*dyxlat));
+
+	dyxlat->used = 1;
+	dyxlat->allocated = nmemb ? nmemb : 16;
+	dyxlat->xlat = xcalloc(dyxlat->allocated, sizeof(struct xlat));
+	MARK_END(dyxlat->xlat[0]);
+
+	return dyxlat;
+}
+
+void
+dyxlat_free(struct dyxlat *const dyxlat)
+{
+	size_t i;
+
+	for (i = 0; i < dyxlat->used - 1; ++i) {
+		free((void *) dyxlat->xlat[i].str);
+		dyxlat->xlat[i].str = NULL;
+	}
+
+	free(dyxlat->xlat);
+	dyxlat->xlat = NULL;
+	free(dyxlat);
+}
+
+const struct xlat *
+dyxlat_get(const struct dyxlat *const dyxlat)
+{
+	return dyxlat->xlat;
+}
+
+void
+dyxlat_add_pair(struct dyxlat *const dyxlat, const uint64_t val,
+		const char *const str, const size_t len)
+{
+	size_t i;
+
+	for (i = 0; i < dyxlat->used - 1; ++i) {
+		if (dyxlat->xlat[i].val == val) {
+			if (strncmp(dyxlat->xlat[i].str, str, len) == 0
+			    && dyxlat->xlat[i].str[len] == '\0')
+				return;
+
+			free((void *) dyxlat->xlat[i].str);
+			dyxlat->xlat[i].str = xstrndup(str, len);
+			return;
+		}
+	}
+
+	if (dyxlat->used >= dyxlat->allocated) {
+		dyxlat->allocated *= 2;
+		dyxlat->xlat = xreallocarray(dyxlat->xlat, dyxlat->allocated,
+					     sizeof(struct xlat));
+	}
+
+	dyxlat->xlat[dyxlat->used - 1].val = val;
+	dyxlat->xlat[dyxlat->used - 1].str = xstrndup(str, len);
+	MARK_END(dyxlat->xlat[dyxlat->used]);
+	dyxlat->used++;
+}