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[libpng15] Move png_check_keyword() from pngwutil.c to pngset.c
This commit is contained in:
Glenn Randers-Pehrson
parent
29c1086ba3
commit
2b5be93866
@ -2,7 +2,7 @@
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/* pngpriv.h - private declarations for use inside libpng
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*
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* Last changed in libpng 1.5.23 [July 23, 2015]
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* Copyright (c) 1998-2015 Glenn Randers-Pehrson
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* Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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*
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@ -1756,6 +1756,9 @@ PNG_EXTERN void png_init_filter_functions_neon(png_structp png_ptr,
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unsigned int bpp);
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#endif
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PNG_EXTERN png_size_t png_check_keyword(png_structp png_ptr,
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png_const_charp key, png_charpp new_key);
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/* Maintainer: Put new private prototypes here ^ */
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#include "pngdebug.h"
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134
pngset.c
134
pngset.c
@ -2,7 +2,7 @@
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/* pngset.c - storage of image information into info struct
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*
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* Last changed in libpng 1.5.24 [November 12, 2015]
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* Copyright (c) 1998-2015 Glenn Randers-Pehrson
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* Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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*
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@ -1349,4 +1349,136 @@ png_set_check_for_invalid_index(png_structp png_ptr, int allowed)
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}
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#endif
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#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) || \
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defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
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/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
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* and if invalid, correct the keyword rather than discarding the entire
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* chunk. The PNG 1.0 specification requires keywords 1-79 characters in
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* length, forbids leading or trailing whitespace, multiple internal spaces,
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* and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
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*
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* The new_key is allocated to hold the corrected keyword and must be freed
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* by the calling routine. This avoids problems with trying to write to
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* static keywords without having to have duplicate copies of the strings.
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*/
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png_size_t /* PRIVATE */
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png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
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{
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png_size_t key_len;
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png_const_charp ikp;
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png_charp kp, dp;
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int kflag;
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int kwarn=0;
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png_debug(1, "in png_check_keyword");
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*new_key = NULL;
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if (key == NULL || (key_len = png_strlen(key)) == 0)
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{
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png_warning(png_ptr, "zero length keyword");
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return ((png_size_t)0);
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}
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png_debug1(2, "Keyword to be checked is '%s'", key);
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*new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
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if (*new_key == NULL)
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{
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png_warning(png_ptr, "Out of memory while procesing keyword");
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return ((png_size_t)0);
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}
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/* Replace non-printing characters with a blank and print a warning */
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for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++)
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{
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if ((png_byte)*ikp < 0x20 ||
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((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1))
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{
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PNG_WARNING_PARAMETERS(p)
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png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_02x,
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(png_byte)*ikp);
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png_formatted_warning(png_ptr, p, "invalid keyword character 0x@1");
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*dp = ' ';
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}
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else
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{
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*dp = *ikp;
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}
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}
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*dp = '\0';
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/* Remove any trailing white space. */
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kp = *new_key + key_len - 1;
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if (*kp == ' ')
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{
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png_warning(png_ptr, "trailing spaces removed from keyword");
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while (key_len && *kp == ' ')
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{
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*(kp--) = '\0';
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key_len--;
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}
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}
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/* Remove any leading white space. */
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kp = *new_key;
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if (*kp == ' ')
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{
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png_warning(png_ptr, "leading spaces removed from keyword");
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while (*kp == ' ')
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{
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kp++;
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key_len--;
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}
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}
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png_debug1(2, "Checking for multiple internal spaces in '%s'", kp);
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/* Remove multiple internal spaces. */
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for (kflag = 0, dp = *new_key; *kp != '\0'; kp++)
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{
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if (*kp == ' ' && kflag == 0)
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{
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*(dp++) = *kp;
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kflag = 1;
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}
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else if (*kp == ' ')
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{
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key_len--;
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kwarn = 1;
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}
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else
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{
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*(dp++) = *kp;
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kflag = 0;
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}
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}
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*dp = '\0';
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if (kwarn != 0)
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png_warning(png_ptr, "extra interior spaces removed from keyword");
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if (key_len == 0)
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{
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png_free(png_ptr, *new_key);
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png_warning(png_ptr, "Zero length keyword");
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}
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if (key_len > 79)
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{
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png_warning(png_ptr, "keyword length must be 1 - 79 characters");
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(*new_key)[79] = '\0';
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key_len = 79;
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}
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return (key_len);
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}
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#endif /* TEXT || pCAL) || iCCP || sPLT */
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#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
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134
pngwutil.c
134
pngwutil.c
@ -2,7 +2,7 @@
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/* pngwutil.c - utilities to write a PNG file
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*
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* Last changed in libpng 1.5.24 [November 12, 2015]
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* Copyright (c) 1998-2015 Glenn Randers-Pehrson
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* Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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*
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@ -1512,138 +1512,6 @@ png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
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}
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#endif
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#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
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defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
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/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
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* and if invalid, correct the keyword rather than discarding the entire
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* chunk. The PNG 1.0 specification requires keywords 1-79 characters in
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* length, forbids leading or trailing whitespace, multiple internal spaces,
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* and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
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*
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* The new_key is allocated to hold the corrected keyword and must be freed
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* by the calling routine. This avoids problems with trying to write to
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* static keywords without having to have duplicate copies of the strings.
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*/
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png_size_t /* PRIVATE */
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png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
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{
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png_size_t key_len;
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png_const_charp ikp;
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png_charp kp, dp;
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int kflag;
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int kwarn=0;
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png_debug(1, "in png_check_keyword");
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*new_key = NULL;
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if (key == NULL || (key_len = png_strlen(key)) == 0)
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{
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png_warning(png_ptr, "zero length keyword");
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return ((png_size_t)0);
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}
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png_debug1(2, "Keyword to be checked is '%s'", key);
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*new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
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if (*new_key == NULL)
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{
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png_warning(png_ptr, "Out of memory while procesing keyword");
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return ((png_size_t)0);
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}
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/* Replace non-printing characters with a blank and print a warning */
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for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++)
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{
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if ((png_byte)*ikp < 0x20 ||
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((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1))
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{
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PNG_WARNING_PARAMETERS(p)
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png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_02x,
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(png_byte)*ikp);
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png_formatted_warning(png_ptr, p, "invalid keyword character 0x@1");
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*dp = ' ';
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}
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else
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{
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*dp = *ikp;
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}
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}
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*dp = '\0';
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/* Remove any trailing white space. */
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kp = *new_key + key_len - 1;
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if (*kp == ' ')
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{
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png_warning(png_ptr, "trailing spaces removed from keyword");
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while (key_len && *kp == ' ')
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{
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*(kp--) = '\0';
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key_len--;
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}
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}
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/* Remove any leading white space. */
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kp = *new_key;
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if (*kp == ' ')
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{
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png_warning(png_ptr, "leading spaces removed from keyword");
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while (*kp == ' ')
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{
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kp++;
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key_len--;
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}
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}
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png_debug1(2, "Checking for multiple internal spaces in '%s'", kp);
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/* Remove multiple internal spaces. */
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for (kflag = 0, dp = *new_key; *kp != '\0'; kp++)
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{
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if (*kp == ' ' && kflag == 0)
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{
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*(dp++) = *kp;
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kflag = 1;
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}
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else if (*kp == ' ')
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{
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key_len--;
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kwarn = 1;
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}
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else
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{
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*(dp++) = *kp;
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kflag = 0;
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}
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}
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*dp = '\0';
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if (kwarn != 0)
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png_warning(png_ptr, "extra interior spaces removed from keyword");
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if (key_len == 0)
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{
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png_free(png_ptr, *new_key);
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png_warning(png_ptr, "Zero length keyword");
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}
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if (key_len > 79)
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{
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png_warning(png_ptr, "keyword length must be 1 - 79 characters");
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(*new_key)[79] = '\0';
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key_len = 79;
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}
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return (key_len);
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}
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#endif
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#ifdef PNG_WRITE_tEXt_SUPPORTED
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/* Write a tEXt chunk */
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void /* PRIVATE */
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