1 files changed, 136 insertions, 0 deletions
diff --git a/gsl-1.9/fft/gsl_fft_complex.h b/gsl-1.9/fft/gsl_fft_complex.h
new file mode 100644
index 0000000..dd3d968
--- /dev/null
+++ b/gsl-1.9/fft/gsl_fft_complex.h
@@ -0,0 +1,136 @@
+/* fft/gsl_fft_complex.h
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 Brian Gough
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ * 
+ * This program 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
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GSL_FFT_COMPLEX_H__
+#define __GSL_FFT_COMPLEX_H__
+
+#include <stddef.h>
+
+#include <gsl/gsl_math.h>
+#include <gsl/gsl_complex.h>
+#include <gsl/gsl_fft.h>
+
+#undef __BEGIN_DECLS
+#undef __END_DECLS
+#ifdef __cplusplus
+# define __BEGIN_DECLS extern "C" {
+# define __END_DECLS }
+#else
+# define __BEGIN_DECLS /* empty */
+# define __END_DECLS /* empty */
+#endif
+
+__BEGIN_DECLS
+
+/*  Power of 2 routines  */
+
+
+int gsl_fft_complex_radix2_forward (gsl_complex_packed_array data,
+                                    const size_t stride,
+                                    const size_t n);
+
+int gsl_fft_complex_radix2_backward (gsl_complex_packed_array data,
+                                     const size_t stride,
+                                     const size_t n);
+
+int gsl_fft_complex_radix2_inverse (gsl_complex_packed_array data,
+                                    const size_t stride,
+                                    const size_t n);
+
+int gsl_fft_complex_radix2_transform (gsl_complex_packed_array data,
+                                      const size_t stride,
+                                      const size_t n,
+                                      const gsl_fft_direction sign);
+
+int gsl_fft_complex_radix2_dif_forward (gsl_complex_packed_array data,
+                                        const size_t stride,
+                                        const size_t n);
+
+int gsl_fft_complex_radix2_dif_backward (gsl_complex_packed_array data,
+                                         const size_t stride,
+                                         const size_t n);
+
+int gsl_fft_complex_radix2_dif_inverse (gsl_complex_packed_array data,
+                                        const size_t stride,
+                                        const size_t n);
+
+int gsl_fft_complex_radix2_dif_transform (gsl_complex_packed_array data,
+                                          const size_t stride,
+                                          const size_t n,
+                                          const gsl_fft_direction sign);
+
+/*  Mixed Radix general-N routines  */
+
+typedef struct
+  {
+    size_t n;
+    size_t nf;
+    size_t factor[64];
+    gsl_complex *twiddle[64];
+    gsl_complex *trig;
+  }
+gsl_fft_complex_wavetable;
+
+typedef struct
+{
+  size_t n;
+  double *scratch;
+}
+gsl_fft_complex_workspace;
+
+
+gsl_fft_complex_wavetable *gsl_fft_complex_wavetable_alloc (size_t n);
+
+void gsl_fft_complex_wavetable_free (gsl_fft_complex_wavetable * wavetable);
+
+gsl_fft_complex_workspace *gsl_fft_complex_workspace_alloc (size_t n);
+
+void gsl_fft_complex_workspace_free (gsl_fft_complex_workspace * workspace);
+
+int gsl_fft_complex_memcpy (gsl_fft_complex_wavetable * dest,
+                            gsl_fft_complex_wavetable * src);
+
+
+int gsl_fft_complex_forward (gsl_complex_packed_array data,
+                             const size_t stride,
+                             const size_t n,
+                             const gsl_fft_complex_wavetable * wavetable,
+                             gsl_fft_complex_workspace * work);
+
+int gsl_fft_complex_backward (gsl_complex_packed_array data,
+                              const size_t stride,
+                              const size_t n,
+                              const gsl_fft_complex_wavetable * wavetable,
+                              gsl_fft_complex_workspace * work);
+
+int gsl_fft_complex_inverse (gsl_complex_packed_array data,
+                             const size_t stride,
+                             const size_t n,
+                             const gsl_fft_complex_wavetable * wavetable,
+                             gsl_fft_complex_workspace * work);
+
+int gsl_fft_complex_transform (gsl_complex_packed_array data,
+                               const size_t stride, const size_t n,
+                               const gsl_fft_complex_wavetable * wavetable,
+                               gsl_fft_complex_workspace * work,
+                               const gsl_fft_direction sign);
+
+__END_DECLS
+
+#endif /* __GSL_FFT_COMPLEX_H__ */