Add GSM full rate codec to LCR's source repository

[lcr.git] / libgsmfr / tls / ginger.c

diff --git a/libgsmfr/tls/ginger.c b/libgsmfr/tls/ginger.c
new file mode 100644 (file)
index 0000000..d830e20
--- /dev/null
+++ b/libgsmfr/tls/ginger.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright 1996 by Jutta Degener and Carsten Bormann, Technische
+ * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
+ * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
+ */
+
+/*$Header*/
+
+/* Generate code to pack a bit array from a name:#bits description */
+
+#include       <stdio.h>
+#include       "taste.h"
+#include       "proto.h"
+#include       <limits.h>
+
+/* This module is the opposite of sour.   Sweet was already taken,
+ * that's why it's called ginger.  (Add one point if that reminds
+ * you of Gary Larson.)
+ */
+
+#define WORD_BITS      16      /* sizeof(uword) * CHAR_BIT on the 
+                                * target architecture---if this isn't 16,
+                                * you're in trouble with this library anyway.
+                                */
+
+#define BYTE_BITS       8      /* CHAR_BIT on the target architecture---
+                                * if this isn't 8, you're in *deep* trouble.
+                                */
+
+void write_code P2((s_spex, n_spex), struct spex * s_spex, int n_spex)
+{
+       struct spex     * sp = s_spex;
+       int               n_in = 0;
+
+       printf("uword sr = 0;\n");
+
+       for (; n_spex > 0; n_spex--, sp++) {
+
+               while (n_in < sp->varsize) {
+                       if (n_in) printf("sr |= (uword)*c++ << %d;\n", n_in);
+                       else printf("sr = *c++;\n");
+                       n_in += BYTE_BITS;
+               }
+
+               printf("%s = sr & %#x;  sr >>= %d;\n",
+                       sp->var, ~(~0U << sp->varsize), sp->varsize);
+
+               n_in -= sp->varsize;
+       }
+
+       if (n_in > 0) {
+               fprintf(stderr, "%d bits left over\n", n_in);
+       }
+}