1 files changed, 64 insertions, 0 deletions
diff --git a/client/libacron/private/helpers.c b/client/libacron/private/helpers.c
new file mode 100644
index 0000000..4d4f3c8
--- /dev/null
+++ b/client/libacron/private/helpers.c
@@ -0,0 +1,64 @@
+/*
+ * Created by yuuta on 7/19/22.
+ */
+
+#include "helpers.h"
+#include "log.h"
+#include "common.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+
+int alloc(void *existing,
+            unsigned int count,
+            unsigned int bytes,
+            bool zero_out,
+            void **out) {
+    const unsigned int size = count * bytes;
+    void *ptr;
+    if (!(ptr = realloc(existing, size))) {
+        const int e = errno;
+        LOGEV("Cannot %sallocate %d bytes of memory: %s (%d).",
+                existing ? "re" : "",
+                size,
+                strerror2(e),
+                e);
+        return AC_E_MEMORY_ALLOCATION;
+    }
+    if (!existing && zero_out) {
+        memset(ptr, 0, size);
+    }
+    *out = ptr;
+    return AC_E_OK;
+}
+
+int strdup2(const char *str, char **out) {
+    char *str2;
+    if (!(str2 = strdup(str))) {
+        const int e = errno;
+        LOGEV("Cannot duplicate string '%s': %s (%d).",
+                str,
+                strerror2(e),
+                e);
+        return AC_E_MEMORY_ALLOCATION;
+    }
+    *out = str2;
+    return AC_E_OK;
+}
+
+static _Thread_local char err_buf[1024];
+
+char *strerror2(int errnum) {
+#ifdef WIN32
+    /* Win32 strerror(3) is thread-safe. */
+    return strerror(errnum);
+#else
+    int r;
+    if ((strerror_r(errnum, err_buf, sizeof(err_buf) / sizeof(char)))) {
+        snprintf(err_buf, 1024, "%d (%d)", errnum, r);
+    }
+    return err_buf;
+#endif
+}
+\ No newline at end of file