1 files changed, 26 insertions, 0 deletions
diff --git a/compat/zlib/contrib/puff/bin-writer.c b/compat/zlib/contrib/puff/bin-writer.c
new file mode 100644
index 0000000..cfd8306
--- /dev/null
+++ b/compat/zlib/contrib/puff/bin-writer.c
@@ -0,0 +1,26 @@
+#include "stdio.h"
+#include "stdlib.h"
+
+/**
+ * Reads hexadecimal values from stdin and writes binary bytes to stdout.
+ * Accepts hex values separated by spaces, newlines, commas, etc.
+ * Handles both uppercase and lowercase hex digits.
+ */
+int main(void) {
+    char hexStr[3]; // Two hex digits + null terminator
+    int ch;
+
+    // Read characters until EOF
+    while((ch = getchar()) != EOF) {
+        hexStr[0] = (char)ch;
+        hexStr[1] = (char)getchar();
+        hexStr[2] = '\0'; // Null-terminate string
+        char *endptr;
+        unsigned char byte = (unsigned char)strtol(hexStr, &endptr, 16);
+        fwrite(&byte, 1, 1, stdout);
+        if((ch = getchar()) == EOF) // Read seaparating space
+          break;
+    }
+
+    return 0;
+}