1 files changed, 43 insertions, 0 deletions
diff --git a/src/fixedbuffer.c b/src/fixedbuffer.c
new file mode 100644
index 0000000..ad99897
--- /dev/null
+++ b/src/fixedbuffer.c
@@ -0,0 +1,43 @@
+#include "fixedbuffer.h"
+
+#include <string.h>
+
+FixedBuffer
+FixedBuf(const char * str)
+{
+    int len = strlen(str);
+    FixedBuffer result;
+    result.ptr = (char *)str;
+    result.cap = len;
+    result.len = len;
+    return result;
+}
+
+bool
+FixedBufferToInt(FixedBuffer fb, int * outInt)
+{
+    bool valid = false;
+    int result = 0;
+
+    bool negative = false;
+
+    for (int i = 0; i < fb.len; i++)
+    {
+        if (i == 0 && fb.ptr[i] == '-')
+        {
+            negative = true;
+            continue;
+        }
+
+        int val = fb.ptr[i] - '0';
+        if (val < 0 || val > 9)
+            return false;
+
+        result *= 10;
+        result += val;
+        valid = true;
+    }
+
+    *outInt = result;
+    return valid;
+}
+\ No newline at end of file