Add graph references

references/igraph-1.0.1/etc/cmake/PadString.cmake

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+# ------------------------------------------------------------------------------
+# Macro PAD_STRING
+#
+# This function pads a string on the left side with a specified character to
+# reach the specified length. If the string length is already long enough or
+# longer, the string will not be modified.
+#
+# PAD_STRING(OUT_VARIABLE DESIRED_LENGTH FILL_CHAR VALUE)
+#
+#     OUT_VARIABLE: name of the resulting variable to create
+#     DESIRED_LENGTH: desired length of the generated string
+#     FILL_CHAR: character to use for padding
+#     VALUE: string to pad
+#
+# Copyright (C) 2011 by Johannes Wienke <jwienke at techfak dot uni-bielefeld dot de>
+#
+# 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, 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.
+# ------------------------------------------------------------------------------
+FUNCTION(PAD_STRING OUT_VARIABLE DESIRED_LENGTH FILL_CHAR VALUE)
+    STRING(LENGTH "${VALUE}" VALUE_LENGTH)
+    MATH(EXPR REQUIRED_PADS "${DESIRED_LENGTH} - ${VALUE_LENGTH}")
+    SET(PAD ${VALUE})
+    IF(REQUIRED_PADS GREATER 0)
+        MATH(EXPR REQUIRED_MINUS_ONE "${REQUIRED_PADS} - 1")
+        FOREACH(FOO RANGE ${REQUIRED_MINUS_ONE})
+            SET(PAD "${FILL_CHAR}${PAD}")
+        ENDFOREACH()
+    ENDIF()
+    SET(${OUT_VARIABLE} "${PAD}" PARENT_SCOPE)
+ENDFUNCTION()