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raster-error.c
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raster-error.c
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/*
* Raster error handling for CUPS.
*
* Copyright © 2007-2018 by Apple Inc.
* Copyright © 2007 by Easy Software Products.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more
* information.
*/
/*
* Include necessary headers...
*/
#include "cups-private.h"
#include "raster-private.h"
#include "debug-internal.h"
/*
* '_cupsRasterAddError()' - Add an error message to the error buffer.
*/
void
_cupsRasterAddError(const char *f, /* I - Printf-style error message */
...) /* I - Additional arguments as needed */
{
_cups_globals_t *cg = _cupsGlobals();
/* Thread globals */
_cups_raster_error_t *buf = &cg->raster_error;
/* Error buffer */
va_list ap; /* Pointer to additional arguments */
char s[2048]; /* Message string */
ssize_t bytes; /* Bytes in message string */
DEBUG_printf(("_cupsRasterAddError(f=\"%s\", ...)", f));
va_start(ap, f);
bytes = vsnprintf(s, sizeof(s), f, ap);
va_end(ap);
if (bytes <= 0)
return;
DEBUG_printf(("1_cupsRasterAddError: %s", s));
bytes ++;
if ((size_t)bytes >= sizeof(s))
return;
if (bytes > (ssize_t)(buf->end - buf->current))
{
/*
* Allocate more memory...
*/
char *temp; /* New buffer */
size_t size; /* Size of buffer */
size = (size_t)(buf->end - buf->start + 2 * bytes + 1024);
if (buf->start)
temp = realloc(buf->start, size);
else
temp = malloc(size);
if (!temp)
return;
/*
* Update pointers...
*/
buf->end = temp + size;
buf->current = temp + (buf->current - buf->start);
buf->start = temp;
}
/*
* Append the message to the end of the current string...
*/
memcpy(buf->current, s, (size_t)bytes);
buf->current += bytes - 1;
}
/*
* '_cupsRasterClearError()' - Clear the error buffer.
*/
void
_cupsRasterClearError(void)
{
_cups_globals_t *cg = _cupsGlobals();
/* Thread globals */
_cups_raster_error_t *buf = &cg->raster_error;
/* Error buffer */
buf->current = buf->start;
if (buf->start)
*(buf->start) = '\0';
}
/*
* '_cupsRasterErrorString()' - Return the last error from a raster function.
*
* If there are no recent errors, NULL is returned.
*
* @since CUPS 1.3/macOS 10.5@
*/
const char * /* O - Last error */
_cupsRasterErrorString(void)
{
_cups_globals_t *cg = _cupsGlobals();
/* Thread globals */
_cups_raster_error_t *buf = &cg->raster_error;
/* Error buffer */
if (buf->current == buf->start)
return (NULL);
else
return (buf->start);
}