Move string utilities to a separate compilation unit

These don't really have anything to do with logging.  Also replace a call to
the non-standard strdup() in the process.

1 files changed, 30 insertions, 0 deletions

diff --git a/src/string_utils.c b/src/string_utils.c
new file mode 100644
index 0000000..a690eb1
--- /dev/null
+++ b/src/string_utils.c
@@ -0,0 +1,30 @@
+// Copyright 2007-2022 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#include "string_utils.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+char*
+jalv_strdup(const char* const str)
+{
+  const size_t len  = strlen(str);
+  char*        copy = (char*)malloc(len + 1);
+  memcpy(copy, str, len + 1);
+  return copy;
+}
+
+char*
+jalv_strjoin(const char* const a, const char* const b)
+{
+  const size_t a_len = strlen(a);
+  const size_t b_len = strlen(b);
+  char* const  out   = (char*)malloc(a_len + b_len + 1);
+
+  memcpy(out, a, a_len);
+  memcpy(out + a_len, b, b_len);
+  out[a_len + b_len] = '\0';
+
+  return out;
+}