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