1 files changed, 41 insertions, 0 deletions

diff --git a/src/string-builder.c b/src/string-builder.c
new file mode 100644
index 0000000..0c53367
--- /dev/null
+++ b/src/string-builder.c
@@ -0,0 +1,41 @@
+#include "string-builder.h"
+#include <stdarg.h>
+#include <stdio.h>
+
+void
+string_builder__append_ntimes (STRING_BUILDER sb, char c, size_t n)
+{
+  DYNAMIC_ARRAY__ENSURE_CAPACITY (*sb, n);
+  memset (sb->items + sb->count, c, n);
+  sb->count += n;
+}
+
+void
+string_builder__append_cstrs (STRING_BUILDER sb, ...)
+{
+  va_list args;
+
+  va_start (args, sb);
+  const char *arg = va_arg (args, const char *);
+  while (arg) {
+    STRING_BUILDER__APPEND_CSTR(*sb, arg);
+    arg = va_arg (args, const char *);
+  } va_end (args);
+}
+
+void
+string_builder__printf (STRING_BUILDER sb, const char *format, ...)
+{
+  va_list args;
+
+  va_start (args, format);
+  int size = vsnprintf (NULL, 0, format, args);
+  va_end (args);
+  ASSERT (size >= 0);
+
+  DYNAMIC_ARRAY__ENSURE_CAPACITY (*sb, size + 1);
+  va_start (args, format);
+  vsnprintf (&sb->items[sb->count], size + 1, format, args);
+  va_end (args);
+  sb->count += size;
+}