svn path=/trunk/externals/algocomp/; revision=10494svn2git-root

1 files changed, 42 insertions, 0 deletions

diff --git a/helpers.c b/helpers.c
new file mode 100755
index 0000000..dc7e754
--- /dev/null
+++ b/helpers.c
@@ -0,0 +1,42 @@
+void fast_d2bl(int x, short *c, short length) {

+	int i;

+	for (i=0;i<length;i++) 

+	*(c++) = (x >> i) & 0x1;

+}

+

+void fast_d2b(unsigned short x, short *c) {

+	int i;

+	for (i=0;i<8;i++) 

+	*(c++) = (x >> i) & 0x1;

+}

+

+

+void fast_b2d(unsigned long int *n, short *c) {

+int i = 32;

+*n = 0;

+while(i--) {

+*n <<=1;

+*n+= *(c+i);

+}

+}

+

+void fast_b2short8(unsigned short *n, short *c) {

+int i = 8;

+*n = 0;

+while(i--) {

+*n <<=1;

+*n+= *(c+i);

+}

+}

+

+void fast_b2short(unsigned int *n, short *c,short length) {

+int i;

+if ((length <= 16) && (length > 0))

+i = length;

+else i = 8;

+*n = 0;

+while(i--) {

+*n <<=1;

+*n+= *(c+i);

+}

+}