xcmscolnm.c

早期freebsd实现

    int	*pSectionSize;
/*
 *	DESCRIPTION
 *		Determines the amount of memory required to store the
 *		color name strings and also the number of strings.
 *
 *	RETURNS
 *		XcmsSuccess if succeeded, otherwise XcmsFailure.
 *
 */
{
    char buf[XCMSDB_MAXLINELEN];
    char token[XCMSDB_MAXLINELEN];
    char token2[XCMSDB_MAXLINELEN];
    char *pBuf;
    char *f1;
    char *f2;
    int i;

    *pNumEntries = 0;
    *pSectionSize = 0;

    /*
     * Advance to START_TOKEN
     *	 Anything before is just considered as comments.
     */

    while((pBuf = fgets(buf, XCMSDB_MAXLINELEN, stream)) != NULL) {
	if ((sscanf(buf, "%s %s", token, token2))
		&& (strcmp(token, START_TOKEN) == 0)) {
	    if (strcmp(token2, FORMAT_VERSION) != 0) {
		/* text file not in the right format */
		return(XcmsFailure);
	    }
	    break;
	} /* else it was just a blank line or comment */
    }

    if (pBuf == NULL) {
	return(XcmsFailure);
    }

    while((pBuf = fgets(buf, XCMSDB_MAXLINELEN, stream)) != NULL) {
	if ((sscanf(buf, "%s", token)) && (strcmp(token, END_TOKEN) == 0)) {
	    break;
	}

	if (field2(buf, DELIM_CHAR, &f1, &f2) != XcmsSuccess) {
	    return(XcmsFailure);
	}

	(*pNumEntries)++;

	(*pSectionSize) += (i = strlen(f1)) + 1;
	for (; i; i--, f1++) {
	    /* REMOVE SPACES FROM COUNT */
	    if (isspace(*f1)) {
		(*pSectionSize)--;
	    }
	}

	(*pSectionSize) += (i = strlen(f2)) + 1;
	for (; i; i--, f2++) {
	    /* REMOVE SPACES FROM COUNT */
	    if (isspace(*f2)) {
		(*pSectionSize)--;
	    }
	}

    }

    return(XcmsSuccess);
}


/*
 *	NAME
 *		ReadColornameDB - Read the Color Name Database
 *
 *	SYNOPSIS
 */
static Status
ReadColornameDB(stream, pRec, pString)
    FILE *stream;
    XcmsPair *pRec;
    char *pString;
/*
 *	DESCRIPTION
 *		Loads the Color Name Database from a text file.
 *
 *	RETURNS
 *		XcmsSuccess if succeeded, otherwise XcmsFailure.
 *
 */
{
    char buf[XCMSDB_MAXLINELEN];
    char token[XCMSDB_MAXLINELEN];
    char token2[XCMSDB_MAXLINELEN];
    char *f1;
    char *f2;
    char *pBuf;

    /*
     * Advance to START_TOKEN
     *	 Anything before is just considered as comments.
     */

    while((pBuf = fgets(buf, XCMSDB_MAXLINELEN, stream)) != NULL) {
	if ((sscanf(buf, "%s %s", token, token2))
		&& (strcmp(token, START_TOKEN) == 0)) {
	    if (strcmp(token2, FORMAT_VERSION) != 0) {
		/* text file not in the right format */
		return(XcmsFailure);
	    }
	    break;
	} /* else it was just a blank line or comment */
    }

    if (pBuf == NULL) {
	return(XcmsFailure);
    }

    /*
     * Process lines between START_TOKEN to END_TOKEN
     */

    while ((pBuf = fgets(buf, XCMSDB_MAXLINELEN, stream)) != NULL) {
	if ((sscanf(buf, "%s", token)) && (strcmp(token, END_TOKEN) == 0)) {
	    /*
	     * Found END_TOKEN so break out of for loop
	     */
	    break;
	}

	/*
	 * Get pairs
	 */
	if (field2(buf, DELIM_CHAR, &f1, &f2) != XcmsSuccess) {
	    /* Invalid line */
	    continue;
	}

	/*
	 * Add strings
	 */

	/* Left String */
	pRec->first = pString;
	_XcmsCopyISOLatin1Lowered(pString, f1);
	pString += (1 + RemoveSpaces(pString));
	pRec->second = pString;
	/* Right String */
	_XcmsCopyISOLatin1Lowered(pString, f2);
	pString += RemoveSpaces(pString) + 1;
	pRec++;

    }

    return(XcmsSuccess);
}


/*
 *	NAME
 *		LoadColornameDB - Load the Color Name Database
 *
 *	SYNOPSIS
 */
static Status
LoadColornameDB()
/*
 *	DESCRIPTION
 *		Loads the Color Name Database from a text file.
 *
 *	RETURNS
 *		XcmsSuccess if succeeded, otherwise XcmsFailure.
 *
 */
{
    int size;
    FILE *stream;
    char *pathname;
    struct stat txt;
    int length;

    /* use and name of this env var is not part of the standard */
    /* implementation-dependent feature */
    if ((pathname = getenv("XCMSDB")) == NULL) {
	pathname = XCMSDB;
    }

    length = strlen(pathname);
    if ((length == 0) || (length >= (BUFSIZ - 5))){
	XcmsColorDbState = XcmsDbInitFailure;
	return(XcmsFailure);
    }

    if (stat(pathname, &txt)) {
	/* can't stat file */
	XcmsColorDbState = XcmsDbInitFailure;
	return(XcmsFailure);
    }

    if ((stream = fopen(pathname, "r")) == NULL) {
	return(XcmsFailure);
    }

    stringSectionSize(stream, &nEntries, &size);
    rewind(stream);

    strings = (char *) Xmalloc(size);
    pairs = (XcmsPair *)Xcalloc(nEntries, sizeof(XcmsPair));

    ReadColornameDB(stream, pairs, strings);

    /*
     * sort the pair recs
     */
    qsort((char *)pairs, nEntries, sizeof(XcmsPair), FirstCmp);

    XcmsColorDbState = XcmsDbInitSuccess;
    return(XcmsSuccess);
}


/*
 *	NAME
 *		XcmsFreeColorDB - Free Color Name Database
 *
 *	SYNOPSIS
 */
void
XcmsFreeColorDB()
/*
 *	DESCRIPTION
 *		Creates
 *
 *	RETURNS
 *		XcmsSuccess if succeeded, otherwise XcmsFailure.
 *
 */
{
    /*
     * Check if XcmsColorDB has been intialized
     */
    if (XcmsColorDbState != XcmsDbInitSuccess) {
	return;
    }

    /*
     * Free memory
     */
    free(strings);
    free(pairs);
}


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

/*
 *	NAME
 *		_XcmsCopyISOLatin1Lowered
 *
 *	SYNOPSIS
 */
void
_XcmsCopyISOLatin1Lowered(dst, src)
    char *dst, *src;
/*
 *	DESCRIPTION
 *		ISO Latin-1 case conversion routine
 *		Identical to XmuCopyISOLatin1Lowered() but provided here
 *		to eliminate need to link with libXmu.a.
 *
 *		IMPLEMENTORS NOTE:
 *		    This routine is also used in XcmsFormatOfPrefix.
 *
 *	RETURNS
 *		Void
 *
 */
{
    register unsigned char *dest, *source;

    for (dest = (unsigned char *)dst, source = (unsigned char *)src;
	 *source;
	 source++, dest++)
    {
	if ((*source >= XK_A) && (*source <= XK_Z))
	    *dest = *source + (XK_a - XK_A);
	else if ((*source >= XK_Agrave) && (*source <= XK_Odiaeresis))
	    *dest = *source + (XK_agrave - XK_Agrave);
	else if ((*source >= XK_Ooblique) && (*source <= XK_Thorn))
	    *dest = *source + (XK_oslash - XK_Ooblique);
	else
	    *dest = *source;
    }
    *dest = '\0';
}


/*
 *	NAME
 *		_XcmsResolveColorString - 
 *
 *	SYNOPSIS
 */
#if NeedFunctionPrototypes
Status
_XcmsResolveColorString (
    XcmsCCC ccc,
    _Xconst char **color_string,
    XcmsColor *pColor_exact_return,
    XcmsColorFormat result_format)
#else
Status
_XcmsResolveColorString(ccc, color_string, pColor_exact_return, result_format)
    XcmsCCC ccc;
    char **color_string;
    XcmsColor *pColor_exact_return;
    XcmsColorFormat result_format;
#endif
/*
 *	DESCRIPTION
 *		The XcmsLookupColor function finds the color specification
 *		associated with a color name in the Device-Independent Color
 *		Name Database.
 *	RETURNS
 *		XcmsFailure if failed to parse string or find any entry in
 *			the database.
 *		XcmsSuccess if succeeded in converting color string to
 *			XcmsColor.
 *		_XCMS_NEWNAME if succeeded in converting color string (which
 *			is a color name to yet another color name.  Note
 *			that the new color name is returned via 'name'.
 *
 *		This function returns both the color specification found in the
 *		database (db specification) and the color specification for the
 *		color displayable by the specified screen (screen
 *		specification).  The calling routine sets the format for these
 *		returned specifications in the XcmsColor format component.
 *		If XcmsUndefinedFormat, the specification is returned in the
 *		format used to store the color in the database.
 */
{
    XcmsColor dbWhitePt;	/* whitePt associated with pColor_exact_return*/
				/*    the screen's white point */
    XcmsColor *pClientWhitePt;
    int retval;
    char *strptr = whitePtStr;

/*
 * 0. Check for invalid arguments.
 */
    if (ccc == NULL || (*color_string)[0] == '\0' || pColor_exact_return == NULL) {
	return(XcmsFailure);
    }

/*
 * 1. First attempt to parse the string
 *    If successful, then convert the specification to the target format
 *    and return.
 */
    if (_XcmsParseColorString(ccc, *color_string, pColor_exact_return)
	    == 1) {
	if (result_format != XcmsUndefinedFormat
		&& pColor_exact_return->format != result_format) {
	    /* need to be converted to the target format */
	    return(XcmsConvertColors(ccc, pColor_exact_return, 1, 
		    result_format, (Bool *)NULL));
	} else {
	    return(XcmsSuccess);
	}
    }

/*
 * 2. Attempt to find it in the DI Color Name Database
 */

    /*
     * a. Convert String into a XcmsColor structure
     *       Attempt to extract the specification for color_string from the
     *       DI Database (pColor_exact_return).  If the DI Database does not
     *	     have this entry, then return failure.
     */
    retval = _XcmsLookupColorName(ccc, color_string, pColor_exact_return);

    if (retval == _XCMS_NEWNAME) {
	/* color_string replaced with a color name */
	return(retval);
    }

    if ((retval == XcmsFailure)
	   || (pColor_exact_return->format == XcmsUndefinedFormat)) {
	return(XcmsFailure);
    }

    /*
     * b. If result_format not defined, then assume target format
     *	  is the exact format.
     */
    if (result_format == XcmsUndefinedFormat) {
	result_format = pColor_exact_return->format;
    }

    if ((ClientWhitePointOfCCC(ccc))->format == XcmsUndefinedFormat) {
	pClientWhitePt = ScreenWhitePointOfCCC(ccc);
    } else {
	pClientWhitePt = ClientWhitePointOfCCC(ccc);
    }

    /*
     * c. Convert to the target format, making adjustments for white
     *	  point differences as necessary.
     */
    if (XCMS_DD_ID(pColor_exact_return->format)) {
	/*
	 * The spec format is Device-Dependent, therefore assume the
	 *    its white point is the Screen White Point.
	 */
	if (XCMS_DD_ID(result_format)) {
	    /*
	     * Target format is Device-Dependent
	     *	Therefore, DD --> DD conversion
	     */
	    return(_XcmsDDConvertColors(ccc, pColor_exact_return,
		    1, result_format, (Bool *) NULL));
	} else {
	    /*
	     * Target format is Device-Independent
	     *	Therefore, DD --> DI conversion
	     */
	    if (ccc->whitePtAdjProc && !_XcmsEqualWhitePts(ccc,
		    pClientWhitePt, ScreenWhitePointOfCCC(ccc))) {
		return((*ccc->whitePtAdjProc)(ccc, ScreenWhitePointOfCCC(ccc),
			pClientWhitePt, result_format,
			pColor_exact_return, 1, (Bool *) NULL));
	    } else {
		if (_XcmsDDConvertColors(ccc, pColor_exact_return, 1,
			XcmsCIEXYZFormat, (Bool *) NULL) == XcmsFailure) {
		    return(XcmsFailure);
		}
		return(_XcmsDIConvertColors(ccc, pColor_exact_return,
			pClientWhitePt, 1, result_format));
	    }
	}
    } else {
	/*
	 * The spec format is Device-Independent, therefore attempt
	 * to find a database white point.
	 *
	 * If the Database does not have a white point, then assume the
	 * database white point is the same as the Screen White Point.
	 */

	if (_XcmsLookupColorName(ccc, &strptr, &dbWhitePt) != 1) {
	    bcopy((char *)&ccc->pPerScrnInfo->screenWhitePt, (char *)&dbWhitePt,
		    sizeof(XcmsColor));
	}
	if (XCMS_DD_ID(result_format)) {
	    /*
	     * Target format is Device-Dependent
	     *	Therefore, DI --> DD conversion
	     */
	    if (ccc->whitePtAdjProc && !_XcmsEqualWhitePts(ccc,
		    &dbWhitePt, ScreenWhitePointOfCCC(ccc))) {
		return((*ccc->whitePtAdjProc)(ccc, &dbWhitePt,
			ScreenWhitePointOfCCC(ccc), result_format,
			pColor_exact_return, 1, (Bool *)NULL));
	    } else {
		if (pColor_exact_return->format != XcmsCIEXYZFormat) {
		    if (_XcmsDIConvertColors(ccc, pColor_exact_return,
			    &dbWhitePt, 1, XcmsCIEXYZFormat) == XcmsFailure) {
			return(XcmsFailure);
		    }
		}
		return (_XcmsDDConvertColors(ccc, pColor_exact_return, 1,
			result_format, (Bool *)NULL));
	    }
	} else {
	    /*
	     * Target format is Device-Independent
	     *	Therefore, DI --> DI conversion
	     */
	    if (ccc->whitePtAdjProc && !_XcmsEqualWhitePts(ccc,
		    &dbWhitePt, pClientWhitePt)) {
		/*
		 * The calling routine wants to resolve this color
		 * in terms if it's white point (i.e. Client White Point).
		 * Therefore, apply white adjustment for the displacement
		 * between dbWhitePt to clientWhitePt.
		 */
		return((*ccc->whitePtAdjProc)(ccc, &dbWhitePt,
			pClientWhitePt, result_format,
			pColor_exact_return, 1, (Bool *)NULL));
	    } else if (_XcmsEqualWhitePts(ccc,
		    &dbWhitePt, pClientWhitePt)) {
		/*
		 * Can use either dbWhitePt or pClientWhitePt to
		 * convert to the result_format.
		 */
		if (pColor_exact_return->format == result_format) {
		    return(XcmsSuccess);
		} else {
		    return (_XcmsDIConvertColors(ccc, pColor_exact_return,
			    &dbWhitePt, 1, result_format));
		}
	    } else {
		/*
		 * Need to convert to a white point independent color
		 * space (let's choose CIEXYZ) then convert to the
		 * target color space.  Why? Lets assume that
		 * pColor_exact_return->format and result format
		 * are white point dependent format (e.g., CIELUV, CIELAB,
		 * TekHVC ... same or any combination). If so, we'll
		 * need to convert the color with dbWhitePt to an absolute
		 * spec (i.e.  non-white point dependent) then convert that
		 * absolute value with clientWhitePt to the result_format.
		 */
		if (pColor_exact_return->format != XcmsCIEXYZFormat) {
		    if (_XcmsDIConvertColors(ccc, pColor_exact_return,
			    &dbWhitePt, 1, XcmsCIEXYZFormat) == XcmsFailure) {
			return(XcmsFailure);
		    }
		}
		if (result_format == XcmsCIEXYZFormat) {
		    return(XcmsSuccess);
		} else {
		    return(_XcmsDIConvertColors(ccc, pColor_exact_return,
			    pClientWhitePt, 1, result_format));
		}
	    }
	}
    }
}