From 98b5d10c2d5effcaf4fdc1bcaa7a3c75b9b7d53a Mon Sep 17 00:00:00 2001
From: knodlseder <>
Date: Fri, 14 Mar 2008 01:26:08 +0000
Subject: [PATCH] add table column access by column number

---
 include/GFitsHDU.hpp  |  1 +
 src/fits/GFitsHDU.cpp | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/include/GFitsHDU.hpp b/include/GFitsHDU.hpp
index 6a479e7..2b5433d 100644
--- a/include/GFitsHDU.hpp
+++ b/include/GFitsHDU.hpp
@@ -68,6 +68,7 @@ public:
     GFitsHeader*   header(void) const;
     GFitsData*     data(void) const;
     GFitsTableCol* column(const std::string& colname) const;
+    GFitsTableCol* column(const int& colnum) const;
     void           primary(void);
 
 private:
diff --git a/src/fits/GFitsHDU.cpp b/src/fits/GFitsHDU.cpp
index be9b83d..e856d54 100644
--- a/src/fits/GFitsHDU.cpp
+++ b/src/fits/GFitsHDU.cpp
@@ -316,6 +316,40 @@ GFitsTableCol* GFitsHDU::column(const std::string& colname) const
 
 
 /***********************************************************************//**
+ * @brief Return pointer to column of table
+ *
+ * @param[in] colnum Number FITS table column to be returned (starting from 1)
+ *
+ * If this method is called for an image a 'fits_HDU_not_a_table' exception
+ * will be thrown.
+ ***************************************************************************/
+GFitsTableCol* GFitsHDU::column(const int& colnum) const
+{
+    // Initialise pointer
+    GFitsTableCol* ptr = NULL;
+
+    // Get pointer to table column
+    switch (m_type) {
+    case HT_IMAGE:              // Image HDU
+        throw GException::fits_HDU_not_a_table(G_COLUMN, m_type);
+        break;
+    case HT_ASCII_TABLE:        // ASCII Table HDU
+        ptr = ((GFitsAsciiTable*)this->data())->column(colnum);
+        break;
+    case HT_BIN_TABLE:          // Binary Table HDU
+        ptr = ((GFitsBinTable*)this->data())->column(colnum);
+        break;
+    default:
+        throw GException::fits_unknown_HDU_type(G_COLUMN, m_type);
+        break;
+    }
+
+    // Return pointer
+    return ptr;
+}
+
+
+/***********************************************************************//**
  * @brief Setup minimal primary HDU
  ***************************************************************************/
 void GFitsHDU::primary(void)
--
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