Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpf / inp_str.c

diff --git a/gmp/mpf/inp_str.c b/gmp/mpf/inp_str.c
new file mode 100644 (file)
index 0000000..042a20d
--- /dev/null
+++ b/gmp/mpf/inp_str.c
@@ -0,0 +1,82 @@
+/* mpf_inp_str(dest_float, stream, base) -- Input a number in base
+   BASE from stdio stream STREAM and store the result in DEST_FLOAT.
+
+Copyright 1996, 2000, 2001, 2002, 2005 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The GNU MP Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include <stdio.h>
+#include <ctype.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+
+size_t
+mpf_inp_str (mpf_ptr rop, FILE *stream, int base)
+{
+  char *str;
+  size_t alloc_size, str_size;
+  int c;
+  int res;
+  size_t nread;
+
+  if (stream == 0)
+    stream = stdin;
+
+  alloc_size = 100;
+  str = (char *) (*__gmp_allocate_func) (alloc_size);
+  str_size = 0;
+  nread = 0;
+
+  /* Skip whitespace.  */
+  do
+    {
+      c = getc (stream);
+      nread++;
+    }
+  while (isspace (c));
+
+  for (;;)
+    {
+      if (str_size >= alloc_size)
+       {
+         size_t old_alloc_size = alloc_size;
+         alloc_size = alloc_size * 3 / 2;
+         str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
+       }
+      if (c == EOF || isspace (c))
+       break;
+      str[str_size++] = c;
+      c = getc (stream);
+    }
+  ungetc (c, stream);
+  nread--;
+
+  if (str_size >= alloc_size)
+    {
+      size_t old_alloc_size = alloc_size;
+      alloc_size = alloc_size * 3 / 2;
+      str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
+    }
+  str[str_size] = 0;
+
+  res = mpf_set_str (rop, str, base);
+  (*__gmp_free_func) (str, alloc_size);
+
+  if (res == -1)
+    return 0;                  /* error */
+
+  return str_size + nread;
+}