X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=tomsfastmath%2Fsrc%2Fbin%2Ffp_read_signed_bin.c;fp=tomsfastmath%2Fsrc%2Fbin%2Ffp_read_signed_bin.c;h=6467d194862d908ed7d0c6a219126dd971df3962;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/tomsfastmath/src/bin/fp_read_signed_bin.c b/tomsfastmath/src/bin/fp_read_signed_bin.c
new file mode 100644
index 0000000..6467d19
--- /dev/null
+++ b/tomsfastmath/src/bin/fp_read_signed_bin.c
@@ -0,0 +1,27 @@
+/* TomsFastMath, a fast ISO C bignum library.
+ * 
+ * This project is meant to fill in where LibTomMath
+ * falls short.  That is speed ;-)
+ *
+ * This project is public domain and free for all purposes.
+ * 
+ * Tom St Denis, tomstdenis@gmail.com
+ */
+#include <tfm_private.h>
+
+void fp_read_signed_bin(fp_int *a, const unsigned char *b, int c)
+{
+  /* read magnitude */
+  fp_read_unsigned_bin (a, b + 1, c - 1);
+
+  /* first byte is 0 for positive, non-zero for negative */
+  if (b[0] == 0) {
+     a->sign = FP_ZPOS;
+  } else {
+     a->sign = FP_NEG;
+  }
+}
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */