# xerbla
> Error handler for BLAS/LAPACK routines.
## Usage
```javascript
var headerDir = require( '@stdlib/blas/base/xerbla' );
```
#### headerDir
Absolute file path for the directory containing header files for C APIs.
```javascript
var dir = headerDir;
// returns
```
## Examples
```javascript
var headerDir = require( '@stdlib/blas/base/xerbla' );
console.log( headerDir );
// =>
```
* * *
## C APIs
### Usage
```c
#include "stdlib/blas/base/xerbla.h"
```
#### c_xerbla( info, \*rout, \*form, ... )
Prints an error message and exits the program.
```c
c_xerbla( 1, "dgemm", "" )
```
The function accepts the following arguments:
- **info**: `[in] CBLAS_INT` argument index.
- **rout**: `[in] char*` name of routine.
- **form**: `[in] char*` null-terminated character format string.
- **vargs** list of arguments to format in the format string.
```c
void c_xerbla( const CBLAS_INT info, const char *rout, const char *form, ... );
```