[thirdparty/cups.git] / cups / raster-error.c

/*
 * 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);
}
Commit	Line	Data
dd204f7a MS	1	/*
	2	* Raster error handling for CUPS.
	3	*
	4	* Copyright © 2007-2018 by Apple Inc.
	5	* Copyright © 2007 by Easy Software Products.
	6	*
	7	* Licensed under Apache License v2.0. See the file "LICENSE" for more
	8	* information.
	9	*/
	10
	11	/*
	12	* Include necessary headers...
	13	*/
	14
fb863569 MS	15	#include "cups-private.h"
	16	#include "raster-private.h"
	17	#include "debug-internal.h"
dd204f7a MS	18
dd204f7a MS	19
dd204f7a MS	20	/*
	21	* '_cupsRasterAddError()' - Add an error message to the error buffer.
	22	*/
	23
	24	void
	25	_cupsRasterAddError(const char f, / I - Printf-style error message */
	26	...) /* I - Additional arguments as needed */
	27	{
	28	_cups_globals_t *cg = _cupsGlobals();
	29	/* Thread globals */
	30	_cups_raster_error_t *buf = &cg->raster_error;
	31	/* Error buffer */
	32	va_list ap; /* Pointer to additional arguments */
	33	char s[2048]; /* Message string */
	34	ssize_t bytes; /* Bytes in message string */
	35
	36
	37	DEBUG_printf(("_cupsRasterAddError(f=\"%s\", ...)", f));
	38
	39	va_start(ap, f);
	40	bytes = vsnprintf(s, sizeof(s), f, ap);
	41	va_end(ap);
	42
	43	if (bytes <= 0)
	44	return;
	45
	46	DEBUG_printf(("1_cupsRasterAddError: %s", s));
	47
	48	bytes ++;
	49
	50	if ((size_t)bytes >= sizeof(s))
	51	return;
	52
	53	if (bytes > (ssize_t)(buf->end - buf->current))
	54	{
	55	/*
	56	* Allocate more memory...
	57	*/
	58
	59	char temp; / New buffer */
	60	size_t size; /* Size of buffer */
	61
	62
	63	size = (size_t)(buf->end - buf->start + 2 * bytes + 1024);
	64
	65	if (buf->start)
	66	temp = realloc(buf->start, size);
	67	else
	68	temp = malloc(size);
	69
	70	if (!temp)
	71	return;
	72
	73	/*
	74	* Update pointers...
	75	*/
	76
	77	buf->end = temp + size;
	78	buf->current = temp + (buf->current - buf->start);
	79	buf->start = temp;
	80	}
	81
	82	/*
	83	* Append the message to the end of the current string...
84	*/
85
86	memcpy(buf->current, s, (size_t)bytes);
87	buf->current += bytes - 1;
88	}
89
90
91	/*
92	* '_cupsRasterClearError()' - Clear the error buffer.
93	*/
94
95	void
96	_cupsRasterClearError(void)
97	{
98	_cups_globals_t *cg = _cupsGlobals();
99	/* Thread globals */
100	_cups_raster_error_t *buf = &cg->raster_error;
101	/* Error buffer */
102
103
104	buf->current = buf->start;
105
106	if (buf->start)
107	*(buf->start) = '\0';
108	}
109
110
111	/*
112	* '_cupsRasterErrorString()' - Return the last error from a raster function.
113	*
114	* If there are no recent errors, NULL is returned.
115	*
116	* @since CUPS 1.3/macOS 10.5@
117	*/
118
119	const char * /* O - Last error */
120	_cupsRasterErrorString(void)
121	{
122	_cups_globals_t *cg = _cupsGlobals();
123	/* Thread globals */
124	_cups_raster_error_t *buf = &cg->raster_error;
125	/* Error buffer */
126
127
128	if (buf->current == buf->start)
129	return (NULL);
130	else
131	return (buf->start);
132	}