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472 lines
15 KiB
472 lines
15 KiB
/* Copyright (C) 2000-2001, Ghostgum Software Pty Ltd. All rights reserved.
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This file is part of GSview.
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
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to anyone for the consequences of using it or for whether it serves any
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particular purpose or works at all, unless he says so in writing. Refer
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to the GNU General Public Licence for full details.
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Everyone is granted permission to copy, modify and redistribute this
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file, but only under the conditions described in the GNU General
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Public Licence. A copy of this license is supposed to have been given
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to you along with this file so you can know your rights and
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responsibilities. It should be in a file named COPYING. Among other
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things, the copyright notice and this notice must be preserved on all
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copies.
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*/
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/* $Id$ */
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/* dscparse.h */
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/* Interface for the DSC parser. */
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#ifndef _DSCPARSE_H_
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#define _DSCPARSE_H_
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/* Some local types that may need modification */
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typedef bool GSBOOL;
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typedef unsigned long GSDWORD; /* must be at least 32 bits */
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typedef unsigned int GSWORD; /* must be at least 16 bits */
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#ifndef FALSE
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# define FALSE ((GSBOOL)0)
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# define TRUE ((GSBOOL)(!FALSE))
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#endif
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#ifndef dsc_private
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# ifdef private
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# define dsc_private private
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# else
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# define dsc_private static
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# endif
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#endif
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/* macros to allow conversion of function declarations to K&R */
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#ifndef P0
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#define P0() void
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#define P1(t1) t1
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#define P2(t1,t2) t1,t2
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#define P3(t1,t2,t3) t1,t2,t3
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#define P4(t1,t2,t3,t4) t1,t2,t3,t4
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#define P5(t1,t2,t3,t4,t5) t1,t2,t3,t4,t5
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#define P6(t1,t2,t3,t4,t5,t6) t1,t2,t3,t4,t5,t6
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#endif
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/* maximum legal length of lines in a DSC compliant file */
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#define DSC_LINE_LENGTH 255
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/* memory for strings is allocated in chunks of this length */
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#define CDSC_STRING_CHUNK 4096
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/* page array is allocated in chunks of this many pages */
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#define CDSC_PAGE_CHUNK 128
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/* buffer length for storing lines passed to dsc_scan_data() */
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/* must be at least 2 * DSC_LINE_LENGTH */
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/* We choose 8192 as twice the length passed to us by GSview */
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#define CDSC_DATA_LENGTH 8192
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/* Return codes from dsc_scan_data()
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* < 0 = error
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* >=0 = OK
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*
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* -1 = error, usually insufficient memory.
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* 0-9 = normal
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* 10-99 = internal codes, should not be seen.
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* 100-999 = identifier of last DSC comment processed.
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*/
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typedef enum {
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CDSC_ERROR = -1, /* Fatal error, usually insufficient memory */
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CDSC_OK = 0, /* OK, no DSC comment found */
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CDSC_NOTDSC = 1, /* Not DSC, or DSC is being ignored */
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/* Any section */
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CDSC_UNKNOWNDSC = 100, /* DSC comment not recognised */
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/* Header section */
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CDSC_PSADOBE = 200, /* %!PS-Adobe- */
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CDSC_BEGINCOMMENTS = 201, /* %%BeginComments */
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CDSC_ENDCOMMENTS = 202, /* %%EndComments */
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CDSC_PAGES = 203, /* %%Pages: */
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CDSC_CREATOR = 204, /* %%Creator: */
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CDSC_CREATIONDATE = 205, /* %%CreationDate: */
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CDSC_TITLE = 206, /* %%Title: */
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CDSC_FOR = 207, /* %%For: */
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CDSC_LANGUAGELEVEL = 208, /* %%LanguageLevel: */
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CDSC_BOUNDINGBOX = 209, /* %%BoundingBox: */
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CDSC_ORIENTATION = 210, /* %%Orientation: */
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CDSC_PAGEORDER = 211, /* %%PageOrder: */
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CDSC_DOCUMENTMEDIA = 212, /* %%DocumentMedia: */
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CDSC_DOCUMENTPAPERSIZES = 213, /* %%DocumentPaperSizes: */
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CDSC_DOCUMENTPAPERFORMS = 214, /* %%DocumentPaperForms: */
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CDSC_DOCUMENTPAPERCOLORS = 215, /* %%DocumentPaperColors: */
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CDSC_DOCUMENTPAPERWEIGHTS = 216, /* %%DocumentPaperWeights: */
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CDSC_DOCUMENTDATA = 217, /* %%DocumentData: */
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CDSC_REQUIREMENTS = 218, /* IGNORED %%Requirements: */
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CDSC_DOCUMENTNEEDEDFONTS = 219, /* IGNORED %%DocumentNeededFonts: */
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CDSC_DOCUMENTSUPPLIEDFONTS = 220, /* IGNORED %%DocumentSuppliedFonts: */
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CDSC_HIRESBOUNDINGBOX = 221, /* %%HiResBoundingBox: */
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CDSC_CROPBOX = 222, /* %%CropBox: */
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/* Preview section */
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CDSC_BEGINPREVIEW = 301, /* %%BeginPreview */
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CDSC_ENDPREVIEW = 302, /* %%EndPreview */
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/* Defaults section */
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CDSC_BEGINDEFAULTS = 401, /* %%BeginDefaults */
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CDSC_ENDDEFAULTS = 402, /* %%EndDefaults */
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/* also %%PageMedia, %%PageQt::Orientation, %%PageBoundingBox */
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/* Prolog section */
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CDSC_BEGINPROLOG = 501, /* %%BeginProlog */
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CDSC_ENDPROLOG = 502, /* %%EndProlog */
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CDSC_BEGINFONT = 503, /* IGNORED %%BeginFont */
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CDSC_ENDFONT = 504, /* IGNORED %%EndFont */
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CDSC_BEGINFEATURE = 505, /* IGNORED %%BeginFeature */
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CDSC_ENDFEATURE = 506, /* IGNORED %%EndFeature */
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CDSC_BEGINRESOURCE = 507, /* IGNORED %%BeginResource */
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CDSC_ENDRESOURCE = 508, /* IGNORED %%EndResource */
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CDSC_BEGINPROCSET = 509, /* IGNORED %%BeginProcSet */
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CDSC_ENDPROCSET = 510, /* IGNORED %%EndProcSet */
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/* Setup section */
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CDSC_BEGINSETUP = 601, /* %%BeginSetup */
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CDSC_ENDSETUP = 602, /* %%EndSetup */
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CDSC_FEATURE = 603, /* IGNORED %%Feature: */
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CDSC_PAPERCOLOR = 604, /* IGNORED %%PaperColor: */
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CDSC_PAPERFORM = 605, /* IGNORED %%PaperForm: */
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CDSC_PAPERWEIGHT = 606, /* IGNORED %%PaperWeight: */
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CDSC_PAPERSIZE = 607, /* %%PaperSize: */
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/* also %%Begin/EndFeature, %%Begin/EndResource */
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/* Page section */
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CDSC_PAGE = 700, /* %%Page: */
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CDSC_PAGETRAILER = 701, /* IGNORED %%PageTrailer */
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CDSC_BEGINPAGESETUP = 702, /* IGNORED %%BeginPageSetup */
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CDSC_ENDPAGESETUP = 703, /* IGNORED %%EndPageSetup */
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CDSC_PAGEMEDIA = 704, /* %%PageMedia: */
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/* also %%PaperColor, %%PaperForm, %%PaperWeight, %%PaperSize */
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CDSC_PAGEORIENTATION = 705, /* %%PageQt::Orientation: */
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CDSC_PAGEBOUNDINGBOX = 706, /* %%PageBoundingBox: */
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/* also %%Begin/EndFont, %%Begin/EndFeature */
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/* also %%Begin/EndResource, %%Begin/EndProcSet */
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CDSC_INCLUDEFONT = 707, /* IGNORED %%IncludeFont: */
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CDSC_VIEWINGORIENTATION = 708, /* %%ViewingQt::Orientation: */
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/* Trailer section */
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CDSC_TRAILER = 800, /* %%Trailer */
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/* also %%Pages, %%BoundingBox, %%Orientation, %%PageOrder, %%DocumentMedia */
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/* %%Page is recognised as an error */
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/* also %%DocumentNeededFonts, %%DocumentSuppliedFonts */
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/* End of File */
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CDSC_EOF = 900 /* %%EOF */
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} CDSC_RETURN_CODE;
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/* stored in dsc->preview */
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typedef enum {
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CDSC_NOPREVIEW = 0,
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CDSC_EPSI = 1,
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CDSC_TIFF = 2,
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CDSC_WMF = 3,
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CDSC_PICT = 4
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} CDSC_PREVIEW_TYPE;
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/* stored in dsc->page_order */
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typedef enum {
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CDSC_ORDER_UNKNOWN = 0,
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CDSC_ASCEND = 1,
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CDSC_DESCEND = 2,
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CDSC_SPECIAL = 3
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} CDSC_PAGE_ORDER;
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/* stored in dsc->page_orientation and dsc->page[pagenum-1].orientation */
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typedef enum {
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CDSC_ORIENT_UNKNOWN = 0,
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CDSC_PORTRAIT = 1,
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CDSC_LANDSCAPE = 2,
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CDSC_UPSIDEDOWN = 3,
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CDSC_SEASCAPE = 4
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} CDSC_ORIENTATION_ENUM;
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/* stored in dsc->document_data */
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typedef enum {
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CDSC_DATA_UNKNOWN = 0,
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CDSC_CLEAN7BIT = 1,
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CDSC_CLEAN8BIT = 2,
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CDSC_BINARY = 3
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} CDSC_DOCUMENT_DATA ;
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typedef struct CDSCBBOX_S {
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int llx;
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int lly;
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int urx;
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int ury;
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} CDSCBBOX;
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typedef struct CDSCFBBOX_S {
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float fllx;
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float flly;
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float furx;
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float fury;
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} CDSCFBBOX;
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typedef struct CDSCMEDIA_S {
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const char *name;
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float width; /* PostScript points */
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float height;
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float weight; /* GSM */
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const char *colour;
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const char *type;
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CDSCBBOX *mediabox; /* Used by GSview for PDF MediaBox */
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} CDSCMEDIA;
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#define CDSC_KNOWN_MEDIA 46
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extern const CDSCMEDIA dsc_known_media[CDSC_KNOWN_MEDIA];
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typedef struct CDSCCTM_S { /* used for %%ViewingQt::Orientation */
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float xx;
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float xy;
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float yx;
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float yy;
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/* float ty; */
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/* float ty; */
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} CDSCCTM;
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typedef struct CDSCPAGE_S {
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int ordinal;
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const char *label;
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unsigned long begin;
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unsigned long end;
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unsigned int orientation;
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const CDSCMEDIA *media;
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CDSCBBOX *bbox; /* PageBoundingBox, also used by GSview for PDF CropBox */
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CDSCCTM *viewing_orientation;
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} CDSCPAGE;
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/* binary DOS EPS header */
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typedef struct CDSCDOSEPS_S {
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GSDWORD ps_begin;
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GSDWORD ps_length;
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GSDWORD wmf_begin;
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GSDWORD wmf_length;
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GSDWORD tiff_begin;
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GSDWORD tiff_length;
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GSWORD checksum;
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} CDSCDOSEPS;
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/* rather than allocated every string with malloc, we allocate
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* chunks of 4k and place the (usually) short strings in these
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* chunks.
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*/
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typedef struct CDSCSTRING_S CDSCSTRING;
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struct CDSCSTRING_S {
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unsigned int index;
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unsigned int length;
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char *data;
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CDSCSTRING *next;
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};
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/* DSC error reporting */
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typedef enum {
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CDSC_MESSAGE_BBOX = 0,
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CDSC_MESSAGE_EARLY_TRAILER = 1,
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CDSC_MESSAGE_EARLY_EOF = 2,
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CDSC_MESSAGE_PAGE_IN_TRAILER = 3,
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CDSC_MESSAGE_PAGE_ORDINAL = 4,
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CDSC_MESSAGE_PAGES_WRONG = 5,
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CDSC_MESSAGE_EPS_NO_BBOX = 6,
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CDSC_MESSAGE_EPS_PAGES = 7,
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CDSC_MESSAGE_NO_MEDIA = 8,
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CDSC_MESSAGE_ATEND = 9,
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CDSC_MESSAGE_DUP_COMMENT = 10,
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CDSC_MESSAGE_DUP_TRAILER = 11,
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CDSC_MESSAGE_BEGIN_END = 12,
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CDSC_MESSAGE_BAD_SECTION = 13,
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CDSC_MESSAGE_LONG_LINE = 14,
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CDSC_MESSAGE_INCORRECT_USAGE = 15
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} CDSC_MESSAGE_ERROR;
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/* severity */
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typedef enum {
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CDSC_ERROR_INFORM = 0, /* Not an error */
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CDSC_ERROR_WARN = 1, /* Not a DSC error itself, */
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CDSC_ERROR_ERROR = 2 /* DSC error */
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} CDSC_MESSAGE_SEVERITY;
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/* response */
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typedef enum {
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CDSC_RESPONSE_OK = 0,
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CDSC_RESPONSE_CANCEL = 1,
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CDSC_RESPONSE_IGNORE_ALL = 2
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} CDSC_RESPONSE;
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extern const char * const dsc_message[];
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typedef struct CDSC_S CDSC;
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struct CDSC_S {
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/* public data */
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GSBOOL dsc; /* TRUE if DSC comments found */
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GSBOOL ctrld; /* TRUE if has CTRLD at start of stream */
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GSBOOL pjl; /* TRUE if has HP PJL at start of stream */
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GSBOOL epsf; /* TRUE if EPSF */
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GSBOOL pdf; /* TRUE if Portable Document Format */
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unsigned int preview; /* enum CDSC_PREVIEW_TYPE */
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char *dsc_version; /* first line of file */
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unsigned int language_level;
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unsigned int document_data; /* Clean7Bit, Clean8Bit, Binary */
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/* enum CDSC_DOCUMENT_DATA */
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/* DSC sections */
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unsigned long begincomments;
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unsigned long endcomments;
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unsigned long beginpreview;
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unsigned long endpreview;
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unsigned long begindefaults;
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unsigned long enddefaults;
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unsigned long beginprolog;
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unsigned long endprolog;
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unsigned long beginsetup;
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unsigned long endsetup;
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unsigned long begintrailer;
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unsigned long endtrailer;
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CDSCPAGE *page;
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unsigned int page_count; /* number of %%Page: pages in document */
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unsigned int page_pages; /* number of pages in document from %%Pages: */
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unsigned int page_order; /* enum CDSC_PAGE_ORDER */
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unsigned int page_orientation; /* the default page orientation */
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/* enum CDSC_ORIENTATION */
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CDSCCTM *viewing_orientation;
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unsigned int media_count; /* number of media items */
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CDSCMEDIA **media; /* the array of media */
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const CDSCMEDIA *page_media;/* the default page media */
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CDSCBBOX *bbox; /* the document bounding box */
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CDSCBBOX *page_bbox; /* the default page bounding box */
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CDSCDOSEPS *doseps; /* DOS binary header */
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char *dsc_title;
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char *dsc_creator;
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char *dsc_date;
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char *dsc_for;
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unsigned int max_error; /* highest error number that will be reported */
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const int *severity; /* array of severity values, one per error */
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/* private data */
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void *caller_data; /* pointer to be provided when calling */
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/* error and debug callbacks */
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int id; /* last DSC comment found */
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int scan_section; /* section currently being scanned */
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/* enum CDSC_SECTION */
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unsigned long doseps_end; /* ps_begin+ps_length, otherwise 0 */
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unsigned int page_chunk_length; /* number of pages allocated */
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unsigned long file_length; /* length of document */
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/* If provided we try to recognise %%Trailer and %%EOF */
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/* incorrectly embedded inside document. */
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/* Can be left set to default value of 0 */
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int skip_document; /* recursion level of %%BeginDocument: */
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int skip_bytes; /* #bytes to ignore from BeginData: */
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/* or DOSEPS preview section */
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int skip_lines; /* #lines to ignore from BeginData: */
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GSBOOL skip_pjl; /* TRUE if skip PJL until first PS comment */
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int begin_font_count; /* recursion level of %%BeginFont */
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int begin_feature_count; /* recursion level of %%BeginFeature */
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int begin_resource_count; /* recursion level of %%BeginResource */
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int begin_procset_count; /* recursion level of %%BeginProcSet */
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/* buffer for input */
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char data[CDSC_DATA_LENGTH];/* start of buffer */
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unsigned int data_length; /* length of data in buffer */
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unsigned int data_index; /* offset to next char in buffer */
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unsigned long data_offset; /* offset from start of document */
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/* to byte in data[0] */
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GSBOOL eof; /* TRUE if there is no more data */
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/* information about DSC line */
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char *line; /* pointer to last read DSC line */
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/* not null terminated */
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unsigned int line_length; /* number of characters in line */
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GSBOOL eol; /* TRUE if dsc_line contains EOL */
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GSBOOL last_cr; /* TRUE if last line ended in \r */
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/* check next time for \n */
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unsigned int line_count; /* line number */
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GSBOOL long_line; /* TRUE if found a line longer than 255 characters */
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char last_line[256]; /* previous DSC line, used for %%+ */
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/* more efficient string storage (for short strings) than malloc */
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CDSCSTRING *string_head; /* linked list head */
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CDSCSTRING *string; /* current list item */
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/* memory allocation routines */
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void *(*memalloc)(P2(size_t size, void *closure_data));
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void (*memfree)(P2(void *ptr, void *closure_data));
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void *mem_closure_data;
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/* function for printing debug messages */
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void (*debug_print_fn)(P2(void *caller_data, const char *str));
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/* function for reporting errors in DSC comments */
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int (*dsc_error_fn)(P5(void *caller_data, CDSC *dsc,
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unsigned int explanation, const char *line, unsigned int line_len));
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/* public data */
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/* Added 2001-10-01 */
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CDSCFBBOX *hires_bbox; /* the hires document bounding box */
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CDSCFBBOX *crop_box; /* the size of the trimmed page */
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};
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/* Public functions */
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/* Create and initialise DSC parser */
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CDSC *dsc_init(P1(void *caller_data));
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CDSC *dsc_init_with_alloc(P4(
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void *caller_data,
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void *(*memalloc)(size_t size, void *closure_data),
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void (*memfree)(void *ptr, void *closure_data),
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void *closure_data));
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/* Free the DSC parser */
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void dsc_free(P1(CDSC *dsc));
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/* Tell DSC parser how long document will be, to allow ignoring
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* of early %%Trailer and %%EOF. This is optional.
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*/
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void dsc_set_length(P2(CDSC *dsc, unsigned long len));
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/* Process a buffer containing DSC comments and PostScript */
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int dsc_scan_data(P3(CDSC *dsc, const char *data, int len));
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/* All data has been processed, fixup any DSC errors */
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int dsc_fixup(P1(CDSC *dsc));
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/* Install error query function */
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void dsc_set_error_function(P2(CDSC *dsc,
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int (*dsc_error_fn)(P5(void *caller_data, CDSC *dsc,
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unsigned int explanation, const char *line, unsigned int line_len))));
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/* Install print function for debug messages */
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void dsc_set_debug_function(P2(CDSC *dsc,
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void (*debug_fn)(P2(void *caller_data, const char *str))));
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/* Print a message to debug output, if provided */
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void dsc_debug_print(P2(CDSC *dsc, const char *str));
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/* should be internal only functions, but made available to
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* GSview for handling PDF
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*/
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int dsc_add_page(P3(CDSC *dsc, int ordinal, char *label));
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int dsc_add_media(P2(CDSC *dsc, CDSCMEDIA *media));
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int dsc_set_page_bbox(P6(CDSC *dsc, unsigned int page_number,
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int llx, int lly, int urx, int ury));
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#endif
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