--- /dev/null
+/* CC0 (Public domain) - see LICENSE file for details */
+#include <ccan/stringbuilder/stringbuilder.h>
+#include <string.h>
+#include <errno.h>
+
+int stringbuilder_args(char* str, size_t str_sz, const char* delim, ...)
+{
+ int res;
+ va_list ap;
+ va_start(ap, delim);
+ res = stringbuilder_va(str, str_sz, delim, ap);
+ va_end(ap);
+ return res;
+}
+
+static int stringbuilder_cpy(
+ char** str, size_t* str_sz, const char* s, size_t s_len)
+{
+ if (!s)
+ return 0;
+
+ if (*str != s) {
+ if (!s_len)
+ s_len = strlen(s);
+ if (s_len > *str_sz)
+ return EMSGSIZE;
+ strcpy(*str, s);
+ }
+ *str += s_len;
+ *str_sz -= s_len;
+ return 0;
+}
+
+int stringbuilder_va(char* str, size_t str_sz, const char* delim, va_list ap)
+{
+ int res = 0;
+ size_t delim_len = 0;
+ const char* s = va_arg(ap, const char*);
+
+ if (delim)
+ delim_len = strlen(delim);
+
+ res = stringbuilder_cpy(&str, &str_sz, s, 0);
+ s = va_arg(ap, const char*);
+ while(s && !res) {
+ res = stringbuilder_cpy(&str, &str_sz,
+ delim, delim_len);
+ if (!res) {
+ res = stringbuilder_cpy(&str, &str_sz,
+ s, 0);
+ s = va_arg(ap, const char*);
+ }
+ }
+ return res;
+}
+
+int stringbuilder_array(char* str, size_t str_sz, const char* delim,
+ size_t n_strings, const char** strings)
+{
+ int res = 0;
+ size_t delim_len = 0;
+
+ if (delim)
+ delim_len = strlen(delim);
+
+ res = stringbuilder_cpy(&str, &str_sz,
+ *(strings++), 0);
+ while(--n_strings && !res) {
+ res = stringbuilder_cpy(&str, &str_sz,
+ delim, delim_len);
+ if (!res)
+ res = stringbuilder_cpy(&str, &str_sz,
+ *(strings++), 0);
+ }
+ return res;
+
+}