Rename and reformat pythonxerbla.

1 files changed, 36 insertions, 0 deletions

diff --git a/numpy/linalg/python_xerbla.c b/numpy/linalg/python_xerbla.c
new file mode 100644
index 000000000..ed0cac9b5
--- /dev/null
+++ b/numpy/linalg/python_xerbla.c
@@ -0,0 +1,36 @@
+#include "Python.h"
+#include "f2c.h"
+
+/*
+  From the original manpage:
+  --------------------------
+  XERBLA is an error handler for the LAPACK routines.
+  It is called by an LAPACK routine if an input parameter has an invalid value.
+  A message is printed and execution stops.
+
+  Instead of printing a message and stopping the execution, a
+  ValueError is raised with the message.
+
+  Parameters:
+  -----------
+  srname: Subroutine name to use in error message, maximum six characters.
+          Spaces at the end are skipped.
+  info: Number of the invalid parameter.
+*/
+
+int xerbla_(char *srname, integer *info)
+{
+        const char* format = "On entry to %.*s" \
+                " parameter number %d had an illegal value";
+        char buf[strlen(format) + 6 + 4]; /* 6 for name, 4 for param. num. */
+
+        int len = 0; /* length of subroutine name*/
+        while( len<6 && srname[len]!='\0' )
+                len++;
+        while( len && srname[len-1]==' ' )
+                len--;
+
+        snprintf(buf, sizeof(buf), format, len, srname, *info);
+        PyErr_SetString(PyExc_ValueError, buf);
+        return 0;
+}