xcmscolnm.c

早期freebsd实现

/* $XConsortium: XcmsColNm.c,v 1.25 92/03/03 12:16:07 rws Exp $" */

/*
 * Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
 * 	All Rights Reserved
 * 
 * This file is a component of an X Window System-specific implementation
 * of Xcms based on the TekColor Color Management System.  Permission is
 * hereby granted to use, copy, modify, sell, and otherwise distribute this
 * software and its documentation for any purpose and without fee, provided
 * that this copyright, permission, and disclaimer notice is reproduced in
 * all copies of this software and in supporting documentation.  TekColor
 * is a trademark of Tektronix, Inc.
 * 
 * Tektronix makes no representation about the suitability of this software
 * for any purpose.  It is provided "as is" and with all faults.
 * 
 * TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
 * INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE.  IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY
 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
 * RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF
 * CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE.
 *
 *	NAME
 *		XcmsColNm.c
 *
 *	DESCRIPTION
 *		Source for _XcmsLookupColorName().
 *
 *
 */

#include "Xlibint.h"
#include "Xcmsint.h"
#include <X11/Xos.h>
#include <sys/stat.h>
#include <stdio.h>
#include <ctype.h>
#define XK_LATIN1
#include <X11/keysymdef.h>


/*
 *      EXTERNS
 *              External declarations required locally to this package
 *              that are not already declared in any of the included header
 *		files (external includes or internal includes).
 */
#ifdef X_NOT_STDC_ENV
extern char *getenv();
extern void qsort();
extern char *bsearch();
#endif
extern XcmsColorSpace **_XcmsDIColorSpaces;
static Status LoadColornameDB();
void _XcmsCopyISOLatin1Lowered();

/*
 *      LOCAL DEFINES
 *		#define declarations local to this package.
 */
#ifndef XCMSDB
#define XCMSDB  "/usr/lib/X11/Xcms.txt"
#endif

#ifndef isgraph
#  define isgraph(c)	(isprint((c)) && !isspace((c)))
#endif

#ifndef XCMSDB_MAXLINELEN
#  define XCMSDB_MAXLINELEN	256
#endif

#define FORMAT_VERSION	"0.1"
#define START_TOKEN	"XCMS_COLORDB_START"
#define END_TOKEN	"XCMS_COLORDB_END"
#define DELIM_CHAR	'\t'

#define	NOT_VISITED	0x0
#define	VISITED		0x1
#define CYCLE		0xFFFF
#define XcmsDbInitNone		-1
#define XcmsDbInitFailure	0
#define XcmsDbInitSuccess	1

/*
 *      LOCAL TYPEDEFS
 */
typedef struct _XcmsPair {
    char *first;
    char *second;
    int flag;
} XcmsPair;

/*
 *      LOCAL VARIABLES
 */
static int XcmsColorDbState = XcmsDbInitNone;
static int nEntries;
static char *strings;
static XcmsPair *pairs;
static char whitePtStr[] = "WhitePoint";


/************************************************************************
 *									*
 *			PRIVATE ROUTINES				*
 *									*
 ************************************************************************/

/*
 *	NAME
 *		_XcmsColorSpaceOfString
 *
 *	SYNOPSIS
 */
static XcmsColorSpace *
_XcmsColorSpaceOfString(ccc, color_string)
    XcmsCCC ccc;
    char *color_string;
/*
 *	DESCRIPTION
 *		Returns a pointer to the color space structure
 *		(XcmsColorSpace) associated with the specified color string.
 *
 *	RETURNS
 *		Pointer to matching XcmsColorSpace structure if found;
 *		otherwise NULL.
 *
 *	CAVEATS
 *
 */
{
    XcmsColorSpace	**papColorSpaces;
    int n;
    char *pchar;

    if ((pchar = strchr(color_string, ':')) == NULL) {
	return(XcmsFailure);
    }
    n = (int)(pchar - color_string);

    if (ccc == NULL) {
	return(NULL);
    }

    /*
     * First try Device-Independent color spaces
     */
    papColorSpaces = _XcmsDIColorSpaces;
    if (papColorSpaces != NULL) {
	while (*papColorSpaces != NULL) {
	    if (strncmp((*papColorSpaces)->prefix, color_string, n) == 0 &&
		!((*papColorSpaces)->prefix)[n]) {
		return(*papColorSpaces);
	    }
	    papColorSpaces++;
	}
    }

    /*
     * Next try Device-Dependent color spaces
     */
    papColorSpaces = ((XcmsFunctionSet *)ccc->pPerScrnInfo->functionSet)->DDColorSpaces;
    if (papColorSpaces != NULL) {
	while (*papColorSpaces != NULL) {
	    if (strncmp((*papColorSpaces)->prefix, color_string, n) == 0 &&
		!((*papColorSpaces)->prefix)[n]) {
		return(*papColorSpaces);
	    }
	    papColorSpaces++;
	}
    }

    return(NULL);
}


/*
 *	NAME
 *		_XcmsParseColorString
 *
 *	SYNOPSIS
 */
static int
_XcmsParseColorString(ccc, color_string, pColor)
    XcmsCCC ccc;
    char *color_string;
    XcmsColor *pColor;
/*
 *	DESCRIPTION
 *		Assuming color_string contains a numerical string color
 *		specification, attempts to parse a string into an
 *		XcmsColor structure.		
 *
 *	RETURNS
 *		0 if failed; otherwise non-zero.
 *
 *	CAVEATS
 *		A color string containing a numerical color specification
 *		must be in ISO Latin-1 encoding!
 */
{
    XcmsColorSpace	*pColorSpace;
    char		string_buf[64];
    char		*string_lowered;
    int			len;
    int			res;

    if (ccc == NULL) {
	return(0);
    }

    /*
     * While copying color_string to string_lowered, convert to lowercase
     */
    if ((len = strlen(color_string)) >= sizeof(string_buf)) {
	string_lowered = (char *) Xmalloc(len+1);
    } else {
	string_lowered = string_buf;
    }

    _XcmsCopyISOLatin1Lowered(string_lowered, color_string);

    if (*string_lowered == '#') {
	if ((pColorSpace = _XcmsColorSpaceOfString(ccc, "rgb:")) != NULL) {
	    res = (*pColorSpace->parseString)(string_lowered, pColor);
	    if (len >= sizeof(string_buf)) Xfree(string_lowered);
	    return res;
	}
    }

    if ((pColorSpace = _XcmsColorSpaceOfString(ccc, string_lowered)) != NULL) {
	res = (*pColorSpace->parseString)(string_lowered, pColor);
	if (len >= sizeof(string_buf)) Xfree(string_lowered);
	return res;
    }

    if (len >= sizeof(string_buf)) Xfree(string_lowered);
    return(0);
}


/*
 *	NAME
 *		FirstCmp - Compare color names of pair recs
 *
 *	SYNOPSIS
 */
static int
FirstCmp(p1, p2)
#if __STDC__
    const void *p1, *p2;
#else
    XcmsPair *p1, *p2;
#endif
/*
 *	DESCRIPTION
 *		Compares the color names of XcmsColorTuples.
 *		This routine is public to allow access from qsort???.
 *
 *	RETURNS
 *		0 if equal;
 *		< 0 if first precedes second,
 *		> 0 if first succeeds second.
 *
 */
{
    return(strcmp(((XcmsPair *)p1)->first, ((XcmsPair *)p2)->first));
}



/*
 *	NAME
 *		stringSectionSize - determine memory needed for strings
 *
 *	SYNOPSIS
 */
static void
SetNoVisit()
/*
 *	DESCRIPTION
 *
 *	RETURNS
 *		void
 *
 */
{
    int i;
    XcmsPair *pair = pairs;

    for (i = 0; i < nEntries; i++, pair++) {
	if (pair->flag != CYCLE) {
	    pair->flag = NOT_VISITED;
	}
    }
}




/*
 *	NAME
 *		field2 - extract two fields
 *
 *	SYNOPSIS
 */
static int
field2(pBuf, delim, p1, p2)
    char *pBuf;
    char delim;	/* in:  field delimiter */
    char **p1;	/* in/out: pointer to pointer to field 1 */
    char **p2;	/* in/out: pointer to pointer to field 2 */
/*
 *	DESCRIPTION
 *		Extracts two fields from a "record".
 *
 *	RETURNS
 *		XcmsSuccess if succeeded, otherwise XcmsFailure.
 *
 */
{
    *p1 = *p2 = NULL;

    /* Find Field 1 */
    while (!isgraph(*pBuf)) {
	if ((*pBuf != '\n') || (*pBuf != '\0')) {
	    return(XcmsFailure);
	}
	if (isspace(*pBuf) || (*pBuf == delim)) {
	    pBuf++;
	}
    }
    *p1 = pBuf;

    /* Find end of Field 2 */
    while (isprint(*pBuf) && (*pBuf != delim)) {
	pBuf++;
    }
    if ((*pBuf == '\n') || (*pBuf == '\0')) {
	return(XcmsFailure);
    }
    if ((*pBuf == ' ') || (*pBuf == delim)) {
	*pBuf++ = '\0';	/* stuff end of string character */
    } else {
	return(XcmsFailure);
    }

    /* Find Field 2 */
    while (!isgraph(*pBuf)) {
	if ((*pBuf == '\n') || (*pBuf == '\0')) {
	    return(XcmsFailure);
	}
	if (isspace(*pBuf) || (*pBuf == delim)) {
	    pBuf++;
	}
    }
    *p2 = pBuf;

    /* Find end of Field 2 */
    while (isprint(*pBuf) && (*pBuf != delim)) {
	pBuf++;
    }
    if (*pBuf != '\0') {
	*pBuf = '\0';	/* stuff end of string character */
    }

    return(XcmsSuccess);
}


/*
 *	NAME
 *		_XcmsLookupColorName - Lookup DB entry for a color name
 *
 *	SYNOPSIS
 */
static Status
_XcmsLookupColorName(ccc, name, pColor)
    XcmsCCC ccc;
    char **name;
    XcmsColor *pColor;
/*
 *	DESCRIPTION
 *		Searches for an entry in the Device-Independent Color Name
 *		Database for the specified string.
 *
 *	RETURNS
 *		XcmsFailure if failed to find a matching entry in
 *			the database.
 *		XcmsSuccess if succeeded in converting color name to
 *			XcmsColor.
 *		_XCMS_NEWNAME if succeeded in converting color string (which
 *			is a color name to yet another color name.  Note
 *			that the new name is passed back via 'name'.
 */
 {
    Status		retval = 0;
    char		name_lowered_64[64];
    char		*name_lowered;
    register int	i, j, left, right;
    int			len;
    char		*tmpName;
    XcmsPair		*pair;

    /*
     * Check state of Database:
     *		XcmsDbInitNone
     *		XcmsDbInitSuccess
     *		XcmsDbInitFailure
     */
    if (XcmsColorDbState == XcmsDbInitFailure) {
	return(XcmsFailure);
    }
    if (XcmsColorDbState == XcmsDbInitNone) {
	if (!LoadColornameDB()) {
	    return(XcmsFailure);
	}
    }

    SetNoVisit();

    /*
     * While copying name to name_lowered, convert to lowercase
     */

    tmpName = *name;

Retry:
    if ((len = strlen(tmpName)) > 63) {
	name_lowered = (char *) Xmalloc(len+1);
    } else {
	name_lowered = name_lowered_64;
    }

    _XcmsCopyISOLatin1Lowered(name_lowered, tmpName);

    /*
     * Now, remove spaces.
     */
    for (i = 0, j = 0; i < len; j++) {
	if (!isspace(name_lowered[j])) {
	    name_lowered[i++] = name_lowered[j];
	}
    }
    name_lowered[i] = '\0';

    left = 0;
    right = nEntries - 1;
    while (left <= right) {
	i = (left + right) >> 1;
	pair = &pairs[i];
	j = strcmp(name_lowered, pair->first);
	if (j < 0)
	    right = i - 1;
	else if (j > 0)
	    left = i + 1;
	else {
	    break;
	}
    }
    if (len > 63) Xfree(name_lowered);

    if (left > right) {
	if (retval == 2) {
	    if (*name != tmpName) {
		*name = tmpName;
	    }
	    return(_XCMS_NEWNAME);
	}
	return(XcmsFailure);
    }

    if (pair->flag == CYCLE) {
	return(XcmsFailure);
    }
    if (pair->flag == VISITED) {
	pair->flag = CYCLE;
	return(XcmsFailure);
    }
	    
    if (_XcmsParseColorString(ccc, pair->second, pColor) == XcmsSuccess) {
	/* f2 contains a numerical string specification */
	return(XcmsSuccess);
    } else {
	/* f2 does not contain a numerical string specification */
	tmpName = pair->second;
	pair->flag = VISITED;
	retval = 2;
	goto Retry;
    }
}


/*
 *	NAME
 *		RemoveSpaces
 *
 *	SYNOPSIS
 */
static int
RemoveSpaces(pString)
    char *pString;
/*
 *	DESCRIPTION
 *		Removes spaces from string.
 *
 *	RETURNS
 *		Void
 *
 */
{
    int i, count = 0;
    char *cptr;

    /* REMOVE SPACES */
    cptr = pString;
    for (i = strlen(pString); i; i--, cptr++) {
	if (!isspace(*cptr)) {
	    *pString++ = *cptr;
	    count++;
	}
    }
    *pString = '\0';
    return(count);
}


/*
 *	NAME
 *		stringSectionSize - determine memory needed for strings
 *
 *	SYNOPSIS
 */
static int
stringSectionSize(stream, pNumEntries, pSectionSize)
    FILE *stream;
    int	*pNumEntries;