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[xemacs-hg @ 2002-05-16 13:30:23 by ben] ui fixes for things that were bothering me bytecode.c, editfns.c, lisp.h, lread.c: Fix save-restriction to use markers rather than pseudo-markers (integers representing the amount of text on either side of the region). That way, all inserts are handled correctly, not just those inside old restriction. Add buffer argument to save_restriction_save(). process.c: Clean up very dirty and kludgy code that outputs into a buffer -- use proper unwind protects, etc. font-lock.c: Do save-restriction/widen around the function -- otherwise, incorrect results will ensue when a buffer has been narrowed before a call to e.g. `buffer-syntactic-context' -- something that happens quite often. fileio.c: Look for a handler for make-temp-name. window.c, winslots.h: Try to solve this annoying problem: have two frames displaying the buffer, in different places; in one, temporarily switch away to another buffer and then back -- and you've lost your position; it's reset to the other one in the other frame. My current solution involves window-level caches of buffers and points (also a cache for window-start); when set-window-buffer is called, it looks to see if the buffer was previously visited in the window, and if so, uses the most recent point at that time. (It's a marker, so it handles changes.) #### Note: It could be argued that doing it on the frame level would be better -- e.g. if you visit a buffer temporarily through a grep, and then go back to that buffer, you presumably want the grep's position rather than some previous position provided everything was in the same frame, even though the grep was in another window in the frame. However, doing it on the frame level fails when you have two windows on the same frame. Perhaps we keep both a window and a frame cache, and use the frame cache if there are no other windows on the frame showing the buffer, else the window's cache? This is probably something to be configurable using a specifier. Suggestions please please please? window.c: Clean up a bit code that deals with the annoyance of window-point vs. point. dialog.el: Function to ask a multiple-choice question, automatically choosing a dialog box or minibuffer representation as necessary. Generalized version of yes-or-no-p, y-or-n-p. files.el: Use get-user-response to ask "yes/no/diff" question when recovering. "diff" means that a diff is displayed between the current file and the autosave. (Converts/deconverts escape-quoted as necessary. No more complaints from you, Mr. Turnbull!) One known problem: when a dialog is used, it's modal, so you can't scroll the diff. Will fix soon. lisp-mode.el: If we're filling a string, don't treat semicolon as a comment, which would give very unfriendly results. Uses `buffer-syntactic-context'. simple.el: all changes back to the beginning. (Useful if you've saved the file in the middle of the changes.) simple.el: Add option kill-word-into-kill-ring, which controls whether words deleted with kill-word, backward-kill-word, etc. are "cut" into the kill ring, or "cleared" into nothingness. (My preference is the latter, by far. I'd almost go so far as suggesting we make it the default, as you can always select a word and then cut it if you want it cut.) menubar-items.el: Add option corresponding to kill-word-into-kill-ring.
author ben
date Thu, 16 May 2002 13:30:58 +0000
parents fdefd0186b75
children 61855263cb07
line wrap: on
line source

/******************************************************************************
* In order to make life a little bit easier when using the GIF file format,   *
* this library was written, and which does all the dirty work...	      *
*									      *
*					Written by Gershon Elber,  Jun. 1989  *
*					Hacks by Eric S. Raymond,  Sep. 1992  *
*                                             and Jareth Hein,     Jan. 1998  *
*******************************************************************************
* History:								      *
* 14 Jun 89 - Version 1.0 by Gershon Elber.				      *
*  3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). *
* 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp)   *
* 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support)             *
* 19 Jan 98 - Version 3.1 by Jareth Hein (Support for user-defined I/O).      *
******************************************************************************/

#ifndef INCLUDED_gifrlib_h_
#define INCLUDED_gifrlib_h_

#define	GIF_ERROR	0
#define GIF_OK		1

#ifndef TRUE
#define TRUE		1
#define FALSE		0
#endif

#ifndef NULL
#define NULL		0
#endif /* NULL */

#define GIF_FILE_BUFFER_SIZE 16384  /* Files uses bigger buffers than usual. */

typedef	int		GifBooleanType;
typedef	unsigned char	GifPixelType;
typedef unsigned char *	GifRowType;
typedef unsigned char	GifByteType;

#define VoidPtr void *

typedef struct GifColorType {
    GifByteType Red, Green, Blue;
} GifColorType;

typedef struct ColorMapObject
{
    int	ColorCount;
    int BitsPerPixel;
    GifColorType *Colors;		/* on malloc(3) heap */
}
ColorMapObject;

typedef struct GifImageDesc {
    int Left, Top, Width, Height,	/* Current image dimensions. */
	Interlace;			/* Sequential/Interlaced lines. */
    ColorMapObject *ColorMap;		/* The local color map */
} GifImageDesc;

/* I/O operations.  If you roll your own, they need to be semantically equivilent to
   fread/fwrite, with an additional paramater to hold data local to your method. */
typedef Bytecount (*Gif_rw_func)(GifByteType *buffer, Bytecount size, VoidPtr method_data);
/* Finish up stream. Non-zero return indicates failure */
typedef int (*Gif_close_func)(VoidPtr close_data);
/* Error handling function */
typedef void (*Gif_error_func)(const char *string, VoidPtr error_data);

typedef struct GifFileType {
    int SWidth, SHeight,		/* Screen dimensions. */
	SColorResolution, 		/* How many colors can we generate? */
	SBackGroundColor;		/* I hope you understand this one... */
    ColorMapObject *SColorMap;		/* NULL if it doesn't exist. */
    int ImageCount;			/* Number of current image */
    GifImageDesc Image;			/* Block describing current image */
    struct SavedImage *SavedImages;	/* Use this to accumulate file state */
    VoidPtr Private;	  		/* Don't mess with this! */
    VoidPtr GifIO;			/* Contains all information for I/O */
} GifFileType;

typedef enum {
    UNDEFINED_RECORD_TYPE,
    SCREEN_DESC_RECORD_TYPE,
    IMAGE_DESC_RECORD_TYPE,		/* Begin with ',' */
    EXTENSION_RECORD_TYPE,		/* Begin with '!' */
    TERMINATE_RECORD_TYPE		/* Begin with ';' */
} GifRecordType;

/******************************************************************************
*  GIF89 extension function codes                                             *
******************************************************************************/

#define COMMENT_EXT_FUNC_CODE		0xfe	/* comment */
#define GRAPHICS_EXT_FUNC_CODE		0xf9	/* graphics control */
#define PLAINTEXT_EXT_FUNC_CODE		0x01	/* plaintext */
#define APPLICATION_EXT_FUNC_CODE	0xff	/* application block */

/******************************************************************************
* IO related routines.  Defined in gif_io.c                                   *
******************************************************************************/
GifFileType *GifSetup(void);
void GifFree(GifFileType *GifFile);
void GifSetReadFunc (GifFileType *GifFile, Gif_rw_func func, VoidPtr data);
void GifSetWriteFunc(GifFileType *GifFile, Gif_rw_func func, VoidPtr data);
void GifSetCloseFunc(GifFileType *GifFile, Gif_close_func func, VoidPtr data);

/******************************************************************************
* O.K., here are the routines one can access in order to decode GIF file:     *
******************************************************************************/

void DGifOpenFileName(GifFileType *GifFile, const char *GifFileName);
void DGifOpenFileHandle(GifFileType *GifFile, int GifFileHandle);
void DGifInitRead(GifFileType *GifFile);
void DGifSlurp(GifFileType *GifFile);
void DGifGetScreenDesc(GifFileType *GifFile);
void DGifGetRecordType(GifFileType *GifFile, GifRecordType *GifType);
void DGifGetImageDesc(GifFileType *GifFile);
void DGifGetLine(GifFileType *GifFile, GifPixelType *GifLine, int GifLineLen);
void DGifGetPixel(GifFileType *GifFile, GifPixelType GifPixel);
void DGifGetComment(GifFileType *GifFile, char *GifComment);
void DGifGetExtension(GifFileType *GifFile, int *GifExtCode,
						GifByteType **GifExtension);
void DGifGetExtensionNext(GifFileType *GifFile, GifByteType **GifExtension);
void DGifGetCode(GifFileType *GifFile, int *GifCodeSize,
						GifByteType **GifCodeBlock);
void DGifGetCodeNext(GifFileType *GifFile, GifByteType **GifCodeBlock);
void DGifGetLZCodes(GifFileType *GifFile, int *GifCode);
int DGifCloseFile(GifFileType *GifFile);

#define	D_GIF_ERR_OPEN_FAILED	101		/* And DGif possible errors. */
#define	D_GIF_ERR_READ_FAILED	102
#define	D_GIF_ERR_NOT_GIF_FILE	103
#define D_GIF_ERR_NO_SCRN_DSCR	104
#define D_GIF_ERR_NO_IMAG_DSCR	105
#define D_GIF_ERR_NO_COLOR_MAP	106
#define D_GIF_ERR_WRONG_RECORD	107
#define D_GIF_ERR_DATA_TOO_BIG	108
#define GIF_ERR_NOT_ENOUGH_MEM 109
#define D_GIF_ERR_NOT_ENOUGH_MEM 109
#define D_GIF_ERR_CLOSE_FAILED	110
#define D_GIF_ERR_NOT_READABLE	111
#define D_GIF_ERR_IMAGE_DEFECT	112
#define D_GIF_ERR_EOF_TOO_SOON	113

/******************************************************************************
* O.K., here are the error routines 					      *
******************************************************************************/
extern void GifSetErrorFunc(GifFileType *GifFile, Gif_error_func func, VoidPtr data);
extern void GifSetWarningFunc(GifFileType *GifFile, Gif_error_func func, VoidPtr data);
extern void GifInternError(GifFileType *GifFile, int errnum);
extern void GifInternWarning(GifFileType *GifFile, int errnum);
extern void GifError(GifFileType *GifFile, const char *err_str);
extern void GifWarning(GifFileType *GifFile, const char *err_str);

/*****************************************************************************
 *
 * Everything below this point is new after version 1.2, supporting `slurp
 * mode' for doing I/O in two big belts with all the image-bashing in core.
 *
 *****************************************************************************/

/******************************************************************************
* Support for the in-core structures allocation (slurp mode).		      *
******************************************************************************/

/* This is the in-core version of an extension record */
typedef struct {
    int		ByteCount;
    GifByteType	*Bytes;		/* on malloc(3) heap */
} ExtensionBlock;

/* This holds an image header, its unpacked raster bits, and extensions */
typedef struct SavedImage {
    GifImageDesc	ImageDesc;

    GifPixelType	*RasterBits;		/* on malloc(3) heap */

    int			Function;
    int			ExtensionBlockCount;
    ExtensionBlock	*ExtensionBlocks;	/* on malloc(3) heap */
} SavedImage;

extern void ApplyTranslation(SavedImage *Image, GifPixelType Translation[]);

extern void MakeExtension(SavedImage *New, int Function);
extern int AddExtensionBlock(SavedImage *New, int Length, GifByteType *data);
extern void FreeExtension(SavedImage *Image);

extern SavedImage *MakeSavedImage(GifFileType *GifFile, SavedImage *CopyFrom);
extern void FreeSavedImages(GifFileType *GifFile);

/*   Common defines used by encode/decode functions */

#define COMMENT_EXT_FUNC_CODE	0xfe /* Extension function code for comment. */
#define GIF_STAMP	"GIFVER"	 /* First chars in file - GIF stamp. */
#define GIF_STAMP_LEN	sizeof(GIF_STAMP) - 1
#define GIF_VERSION_POS	3		/* Version first character in stamp. */
#define GIF87_STAMP	"GIF87a"         /* First chars in file - GIF stamp. */
#define GIF89_STAMP	"GIF89a"         /* First chars in file - GIF stamp. */

#define LZ_MAX_CODE	4095		/* Biggest code possible in 12 bits. */
#define LZ_BITS		12

#define FILE_STATE_READ		0x01
#define FILE_STATE_WRITE	0x01
#define FILE_STATE_SCREEN	0x02
#define FILE_STATE_IMAGE	0x04

#define FLUSH_OUTPUT		4096    /* Impossible code, to signal flush. */
#define FIRST_CODE		4097    /* Impossible code, to signal first. */
#define NO_SUCH_CODE		4098    /* Impossible code, to signal empty. */

#define IS_READABLE(Private)	(!(Private->FileState & FILE_STATE_READ))
#define IS_WRITEABLE(Private)	(Private->FileState & FILE_STATE_WRITE)

typedef struct GifFilePrivateType {
    int FileState,
	BitsPerPixel,	    /* Bits per pixel (Codes uses at list this + 1). */
	ClearCode,				       /* The CLEAR LZ code. */
	EOFCode,				         /* The EOF LZ code. */
	RunningCode,		    /* The next code algorithm can generate. */
	RunningBits,/* The number of bits required to represent RunningCode. */
	MaxCode1,  /* 1 bigger than max. possible code, in RunningBits bits. */
	LastCode,		        /* The code before the current code. */
	CrntCode,				  /* Current algorithm code. */
	StackPtr,		         /* For character stack (see below). */
	CrntShiftState;		        /* Number of bits in CrntShiftDWord. */
    unsigned long CrntShiftDWord;     /* For bytes decomposition into codes. */
    unsigned long PixelCount;		       /* Number of pixels in image. */
    GifByteType Buf[256];	       /* Compressed input is buffered here. */
    GifByteType Stack[LZ_MAX_CODE];	 /* Decoded pixels are stacked here. */
    GifByteType Suffix[LZ_MAX_CODE+1];	       /* So we can trace the codes. */
    unsigned int Prefix[LZ_MAX_CODE+1];
} GifFilePrivateType;

typedef struct GifIODataType {
    Gif_rw_func ReadFunc, WriteFunc;	/* Pointers to the functions that will do the I/O */
    Gif_close_func CloseFunc;    
    VoidPtr ReadFunc_data;		/* data to be passed to the read function */
    VoidPtr WriteFunc_data;		/* data to be passed to the write function */
    VoidPtr CloseFunc_data;		/* data to be passed to the close function */
    Gif_error_func ErrorFunc;	/* MUST NOT RETURN (use lng_jmp or exit)!  */
    Gif_error_func WarningFunc;	/* For warning messages (can be ignored) */
    VoidPtr ErrorFunc_data;
    VoidPtr WarningFunc_data;
} GifIODataType;

typedef struct GifStdIODataType {
  FILE *File;
  int FileHandle;
} GifStdIODataType;

/* Install StdIO funcs on FILE into GifFile */
void GifStdIOInit(GifFileType *GifFile, FILE *file, int filehandle);

/* Error checking reads, writes and closes */
void GifRead(GifByteType *buf, Bytecount size, GifFileType *GifFile);
void GifWrite(GifByteType *buf, Bytecount size, GifFileType *GifFile);
int GifClose(GifFileType *GifFile);

/* The default Read and Write functions for files */
Bytecount GifStdRead(GifByteType *buf, Bytecount size, VoidPtr method_data);
Bytecount GifStdWrite(GifByteType *buf, Bytecount size, VoidPtr method_data);
int GifStdFileClose(VoidPtr method_data);

ColorMapObject *MakeMapObject(int ColorCount, GifColorType *ColorMap);
void FreeMapObject(ColorMapObject *Object);

#endif /* INCLUDED_gifrlib_h_ */