X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=deanimate.c;h=bba74d49bf233f8b86c6c850ec7f6b873952fc59;hp=3ad4e2bed1404cd60a634c7b3df5c8e56a8d72b6;hb=31265b1b2d8f5b81cbde0fcada6271d800430c59;hpb=e72b401da5537a14b29e945944926373cb251825 diff --git a/deanimate.c b/deanimate.c index 3ad4e2be..bba74d49 100644 --- a/deanimate.c +++ b/deanimate.c @@ -1,4 +1,3 @@ -const char deanimate_rcs[] = "$Id: deanimate.c,v 1.19 2008/05/21 15:29:35 fabiankeil Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/deanimate.c,v $ @@ -6,20 +5,16 @@ const char deanimate_rcs[] = "$Id: deanimate.c,v 1.19 2008/05/21 15:29:35 fabian * Purpose : Declares functions to manipulate binary images on the * fly. High-level functions include: * - Deanimation of GIF images - * - * Functions declared include: gif_deanimate, buf_free, - * buf_copy, buf_getbyte, gif_skip_data_block - * and gif_extract_image * * Copyright : Written by and Copyright (C) 2001 - 2004, 2006 by the - * SourceForge Privoxy team. http://www.privoxy.org/ + * Privoxy team. https://www.privoxy.org/ * * Based on the GIF file format specification (see * http://tronche.com/computer-graphics/gif/gif89a.html) * and ideas from the Image::DeAnim Perl module by * Ken MacFarlane, * - * This program is free software; you can redistribute it + * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU General * Public License as published by the Free Software * Foundation; either version 2 of the License, or (at @@ -45,15 +40,13 @@ const char deanimate_rcs[] = "$Id: deanimate.c,v 1.19 2008/05/21 15:29:35 fabian #include #include -#include "errlog.h" #include "project.h" +#include "errlog.h" #include "deanimate.h" #include "miscutil.h" -const char deanimate_h_rcs[] = DEANIMATE_H_VERSION; - /********************************************************************* - * + * * Function : buf_free * * Description : Safely frees a struct binbuffer @@ -79,7 +72,7 @@ void buf_free(struct binbuffer *buf) /********************************************************************* - * + * * Function : buf_extend * * Description : Ensure that a given binbuffer can hold a given amount @@ -90,7 +83,7 @@ void buf_free(struct binbuffer *buf) * Parameters : * 1 : buf = Pointer to the binbuffer * 2 : length = Desired minimum size - * + * * * Returns : 0 on success, 1 on failure. * @@ -121,7 +114,7 @@ static int buf_extend(struct binbuffer *buf, size_t length) /********************************************************************* - * + * * Function : buf_copy * * Description : Safely copies a given amount of bytes from one @@ -142,7 +135,7 @@ static int buf_copy(struct binbuffer *src, struct binbuffer *dst, size_t length) /* * Sanity check: Can't copy more data than we have */ - if (src->offset + length > src->size) + if (src->offset + length > src->size) { return 1; } @@ -150,7 +143,7 @@ static int buf_copy(struct binbuffer *src, struct binbuffer *dst, size_t length) /* * Ensure that dst can hold the new data */ - if (buf_extend(dst, length)) + if (buf_extend(dst, length)) { return 1; } @@ -169,7 +162,7 @@ static int buf_copy(struct binbuffer *src, struct binbuffer *dst, size_t length) /********************************************************************* - * + * * Function : buf_getbyte * * Description : Safely gets a byte from a given binbuffer at a @@ -197,7 +190,7 @@ static unsigned char buf_getbyte(const struct binbuffer *src, size_t offset) /********************************************************************* - * + * * Function : gif_skip_data_block * * Description : Safely advances the offset of a given struct binbuffer @@ -215,7 +208,7 @@ static int gif_skip_data_block(struct binbuffer *buf) { unsigned char c; - /* + /* * Data blocks are sequences of chunks, which are headed * by a one-byte length field, with the last chunk having * zero length. @@ -236,12 +229,12 @@ static int gif_skip_data_block(struct binbuffer *buf) /********************************************************************* - * + * * Function : gif_extract_image * * Description : Safely extracts an image data block from a given * struct binbuffer that contains a GIF image and whose - * offset is positioned at the start of a data block + * offset is positioned at the start of a data block * into a given destination binbuffer. * * Parameters : @@ -279,7 +272,7 @@ static int gif_extract_image(struct binbuffer *src, struct binbuffer *dst) if (buf_copy(src, dst, (size_t)map_length)) { return 1; - } + } } if (buf_copy(src, dst, 1)) return 1; @@ -304,15 +297,15 @@ static int gif_extract_image(struct binbuffer *src, struct binbuffer *dst) } /********************************************************************* - * + * * Function : gif_deanimate * * Description : Deanimate a given GIF image, i.e. given a GIF with * an (optional) image block and an arbitrary number * of image extension blocks, produce an output GIF with * only one image block that contains the last image - * (extenstion) block of the original. - * Also strip Comments, Application extenstions, etc. + * (extension) block of the original. + * Also strip Comments, Application extensions, etc. * * Parameters : * 1 : src = Pointer to the source binbuffer @@ -336,9 +329,9 @@ int gif_deanimate(struct binbuffer *src, struct binbuffer *dst, int get_first_im c = buf_getbyte(src, 10); /* - * Check & copy GIF header + * Check & copy GIF header */ - if (strncmp(src->buffer, "GIF89a", 6) && strncmp(src->buffer, "GIF87a", 6)) + if (strncmp(src->buffer, "GIF89a", 6) && strncmp(src->buffer, "GIF87a", 6)) { return 1; } @@ -353,7 +346,7 @@ int gif_deanimate(struct binbuffer *src, struct binbuffer *dst, int get_first_im /* * Look for global colormap and copy if found. */ - if(c & 0x80) + if (c & 0x80) { int map_length = 3 * (1 << ((c & 0x07) + 1)); if (map_length <= 0) @@ -371,10 +364,7 @@ int gif_deanimate(struct binbuffer *src, struct binbuffer *dst, int get_first_im /* * Reserve a buffer for the current image block */ - if (NULL == (image = (struct binbuffer *)zalloc(sizeof(*image)))) - { - return 1; - } + image = zalloc_or_die(sizeof(*image)); /* * Parse the GIF block by block and copy the relevant @@ -390,7 +380,7 @@ int gif_deanimate(struct binbuffer *src, struct binbuffer *dst, int get_first_im case 0x3b: goto write; - /* + /* * Image block: Extract to current image buffer. */ case 0x2c: @@ -450,13 +440,13 @@ int gif_deanimate(struct binbuffer *src, struct binbuffer *dst, int get_first_im */ default: goto failed; - + } } /* -END- while src */ /* * Either we got here by goto, or because the GIF is - * bogus and EOF was reached before an end-of-gif marker + * bogus and EOF was reached before an end-of-gif marker * was found. */