Implement untested string and path helpers for easy cross compatability

src/bstr.c

@@ -0,0 +1,37 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "bstr.h"
+
+char *
+bstr_print(char *base, const char *fmt, ...)
+{
+    char *new_buf;
+    size_t new_len;
+    va_list ap;
+
+    va_start(ap, fmt);
+    new_len = vsnprintf(NULL, 0, fmt, ap);
+    va_end(ap);
+
+    new_buf = calloc(1, new_len + 1);
+
+    va_start(ap, fmt);
+    vsprintf(new_buf, fmt, ap);
+    va_end(ap);
+
+    if (!base) {
+        return new_buf;
+    } else {
+        size_t baselen = strlen(base);
+
+        base = realloc(base, baselen + new_len + 1);
+        memcpy(&base[baselen], new_buf, new_len);
+        base[baselen + new_len] = '\0';
+
+        free(new_buf);
+        return base;
+    }
+}