* mpq/set_str.c: New file.

1 files changed, 61 insertions, 0 deletions

diff --git a/mpq/set_str.c b/mpq/set_str.c
new file mode 100644
index 000000000..609fff2d7
--- /dev/null
+++ b/mpq/set_str.c
@@ -0,0 +1,61 @@
+/* mpq_set_str -- string to mpq conversion.
+
+Copyright 2001 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 2.1 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; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+
+
+/* FIXME: Would like an mpz_set_mem (or similar) accepting a pointer and
+   length so we wouldn't have to copy the numerator just to null-terminate
+   it.  */
+
+int
+mpq_set_str (mpq_ptr q, const char *str, int base)
+{
+  const char  *slash;
+  char        *num;
+  size_t      numlen;
+  int         ret;
+
+  slash = strchr (str, '/');
+  if (slash == NULL)
+    {
+      q->_mp_den._mp_size = 1;
+      q->_mp_den._mp_d[0] = 1;
+
+      return mpz_set_str (mpq_numref(q), str, base);
+    }
+
+  numlen = slash - str;
+  num = (*__gmp_allocate_func) (numlen+1);
+  memcpy (num, str, numlen);
+  num[numlen] = '\0';
+  ret = mpz_set_str (mpq_numref(q), num, base);
+  (*__gmp_free_func) (num, numlen+1);
+
+  if (ret != 0)
+    return ret;
+
+  return mpz_set_str (mpq_denref(q), slash+1, base);
+}