Merge branch 'mrb_debug_strdup-and-strndup' of https://github.com/cremno/mruby into cremno-mrb_debug_strdup-and-strndup

1 files changed, 34 insertions, 0 deletions

diff --git a/mrbgems/mruby-bin-debugger/tools/mrdb/apistring.c b/mrbgems/mruby-bin-debugger/tools/mrdb/apistring.c
new file mode 100644
index 000000000..4cf528feb
--- /dev/null
+++ b/mrbgems/mruby-bin-debugger/tools/mrdb/apistring.c
@@ -0,0 +1,34 @@
+/*
+** apistring.c
+**
+*/
+
+#include <string.h>
+#include "apistring.h"
+
+static size_t
+mrb_debug_strnlen(const char *s, size_t maxlen)
+{
+  const char *p = memchr(s, '\0', maxlen);
+  return p != NULL ? (size_t)(p - s) : maxlen;
+}
+
+char*
+mrb_debug_strndup(mrb_state *mrb, const char *s, size_t size)
+{
+  size_t l = mrb_debug_strnlen(s, size);
+  char *d = mrb_malloc_simple(mrb, l + 1);
+  if (d != NULL) {
+    memcpy(d, s, l);
+    d[l] = '\0';
+  }
+  return d;
+}
+
+char*
+mrb_debug_strdup(mrb_state *mrb, const char *s)
+{
+  size_t z = strlen(s) + 1;
+  char *d = mrb_malloc_simple(mrb, z);
+  return d != NULL ? memcpy(d, s, z) : NULL;
+}