#include <assert.h>
#include <string.h>

/* error codes */
#define RERR_NONE		0
#define RERR_OPEN	 	1      /* cant open file */
#define RERR_READ		2      /* error reading from file */
#define RERR_WRITE		3      /* error writing to file */
#define RERR_NOMEMORY		4      /* out of memory */
#define RERR_NOCOLOR		5      /* out of color cells */
#define RERR_BADIMAGEFILE	6      /* image file is corrupted or invalid */
#define RERR_BADFORMAT		7      /* image file format is unknown */
#define RERR_BADINDEX		8      /* no such image index in file */

#define RERR_BADVISUALID	16     /* invalid visual ID requested for context */
#define RERR_STDCMAPFAIL	17     /* failed to created std colormap */

#define RERR_XERROR		127    /* internal X error */
#define RERR_INTERNAL		128    /* should not happen */

void wraster_report_error_code(int value);

const char* wraster_current_error_message();

int wraster_current_error_code();

int main(int argc, char** argv) {
  assert(wraster_current_error_code() == RERR_NONE);
  assert(strcmp(wraster_current_error_message(), "no error") == 0);

  wraster_report_error_code(RERR_WRITE);

  assert(wraster_current_error_code() == RERR_WRITE);
  assert(strcmp(wraster_current_error_message(), "error writing to file") == 0);
 
  wraster_report_error_code(RERR_OPEN);

  assert(wraster_current_error_code() == RERR_OPEN);
  assert(strcmp(wraster_current_error_message(), "could not open file") == 0);
}