1 files changed, 82 insertions, 0 deletions
diff --git a/set_str_raw.c b/set_str_raw.c
new file mode 100644
index 000000000..bef006126
--- /dev/null
+++ b/set_str_raw.c
@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAS_STRING_H
+#include <string.h>
+#else
+#include <strings.h>
+#endif
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "longlong.h"
+#include "mpfr.h"
+
+/* Currently the number should be of the form +/- xxxx.xxxxxxEyy, with 
+   decimal exponent. The mantissa of x is supposed to be large enough 
+   to hold all the bits of str. */
+
+void
+mpfr_set_str_raw(mpfr_ptr x, char *str)
+{
+  char *str2, *str0, negative = 0; 
+  unsigned long j, l, k = 0, xsize, cnt; mp_limb_t *xp; 
+  long expn = 0; char *endstr2;
+
+  xp = x -> _mp_d; 
+  xsize = 1 + (PREC(x)-1)/BITS_PER_MP_LIMB;
+  str0 = str2 = (char *) malloc(strlen(str)*sizeof(char)); 
+
+  if (*str == '-') { negative = 1; str++; }
+
+  while (*str == '0') { str++; } 
+
+  while (*str == '0' || *str == '1')
+    { *(str2++) = *(str++); k++; }
+
+  if (*str == '.') 
+    {
+      str++;
+      while (*str == '0' || *str == '1')
+	{ *(str2++) = *(str++); }
+
+      if (*str == '[') { while (*str != ']') str++; }
+    }
+    
+  if (*str == '[') { while (*str != ']') str++; }
+
+  if (*str == 'e' || *str == 'E') 
+    {
+      expn = k + atoi(++str); 
+      if (expn < k)
+	{
+	  fprintf(stderr, "Warning : possible overflow in exponent in Str -> mpfr\n"); 
+	}
+    }
+  endstr2 = str2;
+  l = (strlen(str0) - 1) / BITS_PER_MP_LIMB + 1; str2 = str0; 
+
+  /* str2[0]..endstr2[-1] contains the mantissa */
+  for (k = 1; k <= l; k++)
+    {
+      j = 0; 
+      xp[xsize - k] = 0; 
+      while (str2<endstr2 && j < BITS_PER_MP_LIMB)
+	{
+	  xp[xsize - k] = (xp[xsize - k] << 1) + (*str2 - '0'); 
+	  str2++; j++; 
+	}
+      xp[xsize - k] <<= (BITS_PER_MP_LIMB - j); 
+    }
+
+  for (; k <= xsize; k++) { xp[xsize - k] = 0; }
+
+  count_leading_zeros(cnt, xp[xsize - 1]); 
+  if (cnt) mpn_lshift(xp, xp, xsize, cnt); 
+
+  x -> _mp_exp = expn - cnt; 
+  x -> _mp_size = (negative ? -xsize : xsize); 
+
+  free(str0); 
+  
+  /* May change to take into account : syntax errors, overflow in exponent, 
+     string truncated because of size of x */
+}