1 files changed, 89 insertions, 0 deletions
diff --git a/mpc/src/strtoc.c b/mpc/src/strtoc.c
new file mode 100644
index 0000000000..b96ccee528
--- /dev/null
+++ b/mpc/src/strtoc.c
@@ -0,0 +1,89 @@
+/* mpc_strtoc -- Read a complex number from a string.
+
+Copyright (C) 2009, 2010, 2011 INRIA
+
+This file is part of GNU MPC.
+
+GNU MPC 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.
+
+GNU MPC 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 this program. If not, see http://www.gnu.org/licenses/ .
+*/
+
+#include <string.h>
+#include <ctype.h>
+#include "mpc-impl.h"
+
+static void
+skip_whitespace (const char **p)
+{
+   /* TODO: This function had better be inlined, but it is unclear whether
+      the hassle to get this implemented across all platforms is worth it. */
+   while (isspace ((unsigned char) **p))
+      (*p)++;
+}
+
+int
+mpc_strtoc (mpc_ptr rop, const char *nptr, char **endptr, int base, mpc_rnd_t rnd)
+{
+   const char *p;
+   char *end;
+   int bracketed = 0;
+
+   int inex_re = 0, inex_im = 0;
+
+   if (nptr == NULL || base > 36 || base == 1)
+     goto error;
+
+   p = nptr;
+   skip_whitespace (&p);
+
+   if (*p == '('){
+      bracketed = 1;
+      ++p;
+   }
+
+   inex_re = mpfr_strtofr (mpc_realref(rop), p, &end, base, MPC_RND_RE (rnd));
+   if (end == p)
+      goto error;
+   p = end;
+
+   if (!bracketed)
+     inex_im = mpfr_set_ui (mpc_imagref (rop), 0ul, GMP_RNDN);
+   else {
+     if (!isspace ((unsigned char)*p))
+         goto error;
+
+      skip_whitespace (&p);
+
+      inex_im = mpfr_strtofr (mpc_imagref(rop), p, &end, base, MPC_RND_IM (rnd));
+      if (end == p)
+         goto error;
+      p = end;
+
+      skip_whitespace (&p);
+      if (*p != ')')
+         goto error;
+
+      p++;
+   }
+
+   if (endptr != NULL)
+     *endptr = (char*) p;
+   return MPC_INEX (inex_re, inex_im);
+
+error:
+   if (endptr != NULL)
+     *endptr = (char*) nptr;
+   mpfr_set_nan (mpc_realref (rop));
+   mpfr_set_nan (mpc_imagref (rop));
+   return -1;
+}