Add support for decompressing Lempel-Ziv-Huffman, LH5 variant.

zoo/ar.h

@@ -0,0 +1,40 @@
+/*$Source: /usr/home/dhesi/zoo/RCS/ar.h,v $*/
+/*$Id: ar.h,v 1.17 91/07/09 01:39:50 dhesi Exp $*/
+/***********************************************************
+    ar.h
+
+Adapted from "ar" archiver written by Haruhiko Okumura.
+***********************************************************/
+// Modified for in-memory decompression by Natalia Portillo, 2025
+
+#include <stdint.h>
+#include <stdio.h>
+
+/* all the prototypes follow here for all files */
+
+/* DECODE.C */
+void decode_start();
+int  decode(uint32_t count, uint8_t *buffer);
+
+/* HUF.C */
+void     output(uint32_t c, uint32_t p);
+uint32_t decode_c(void);
+uint32_t decode_p(void);
+void     huf_decode_start(void);
+
+/* IO.C */
+void     fillbuf(int n);
+uint32_t getbits(int n);
+void     putbits(int n, uint32_t x);
+void     init_getbits(void);
+void     init_putbits(void);
+
+/* MAKETBL.C */
+void make_table(int nchar, uint8_t bitlen[], int tablebits, uint16_t table[]);
+
+/* MAKETREE.C */
+int make_tree(int nparm, uint16_t freqparm[], uint8_t lenparm[], uint16_t codeparm[]);
+
+/* for lzh modules and also for ar.c to use in defining buffer size */
+#define DICBIT 13 /* 12(-lh4-) or 13(-lh5-) */
+#define DICSIZ ((unsigned)1 << DICBIT)