Added libXpm

1 files changed, 287 insertions, 0 deletions

diff --git a/libXpm/src/rgb.c b/libXpm/src/rgb.c
new file mode 100644
index 000000000..848ae1f11
--- /dev/null
+++ b/libXpm/src/rgb.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright (C) 1989-95 GROUPE BULL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of GROUPE BULL shall not be
+ * used in advertising or otherwise to promote the sale, use or other dealings
+ * in this Software without prior written authorization from GROUPE BULL.
+ */
+
+/*****************************************************************************\
+* rgb.c:                                                                      *
+*                                                                             *
+*  XPM library                                                                *
+*  Rgb file utilities                                                         *
+*                                                                             *
+*  Developed by Arnaud Le Hors                                                *
+\*****************************************************************************/
+
+/*
+ * The code related to FOR_MSW has been added by
+ * HeDu (hedu@cul-ipn.uni-kiel.de) 4/94
+ */
+
+/*
+ * Part of this code has been taken from the ppmtoxpm.c file written by Mark
+ * W. Snitily but has been modified for my special need
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "XpmI.h"
+#include <ctype.h>
+
+#ifndef FOR_MSW				/* normal part first, MSW part at
+					 * the end, (huge ifdef!) */
+/*
+ * Read a rgb text file.  It stores the rgb values (0->65535)
+ * and the rgb mnemonics (malloc'ed) into the "rgbn" array.  Returns the
+ * number of entries stored.
+ */
+int
+xpmReadRgbNames(
+    char	*rgb_fname,
+    xpmRgbName	 rgbn[])
+{
+    FILE *rgbf;
+    int n, items, red, green, blue;
+    char line[512], name[512], *rgbname, *s1, *s2;
+    xpmRgbName *rgb;
+
+    /* Open the rgb text file.  Abort if error. */
+    if ((rgbf = fopen(rgb_fname, "r")) == NULL)
+	return 0;
+
+    /* Loop reading each line in the file. */
+    n = 0;
+    rgb = rgbn; 
+    /* Quit if rgb text file has too many entries. */
+    while (fgets(line, sizeof(line), rgbf) && n < MAX_RGBNAMES) {
+
+	/* Skip silently if line is bad. */
+	items = sscanf(line, "%d %d %d %[^\n]\n", &red, &green, &blue, name);
+	if (items != 4)
+	    continue;
+
+	/*
+	 * Make sure rgb values are within 0->255 range. Skip silently if
+	 * bad.
+	 */
+	if (red < 0 || red > 0xFF ||
+	    green < 0 || green > 0xFF ||
+	    blue < 0 || blue > 0xFF)
+	    continue;
+
+	/* Allocate memory for ascii name. If error give up here. */
+	if (!(rgbname = (char *) XpmMalloc(strlen(name) + 1)))
+	    break;
+
+	/* Copy string to ascii name and lowercase it. */
+	for (s1 = name, s2 = rgbname; *s1; s1++)
+	    *s2++ = tolower(*s1);
+	*s2 = '\0';
+
+	/* Save the rgb values and ascii name in the array. */
+	rgb->r = red * 257;		/* 65535/255 = 257 */
+	rgb->g = green * 257;
+	rgb->b = blue * 257;
+	rgb->name = rgbname;
+	rgb++;
+	n++;
+    }
+
+    fclose(rgbf);
+
+    /* Return the number of read rgb names. */
+    return n < 0 ? 0 : n;
+}
+
+/*
+ * Return the color name corresponding to the given rgb values
+ */
+char *
+xpmGetRgbName(
+    xpmRgbName	rgbn[],		/* rgb mnemonics from rgb text file */
+    int		rgbn_max,	/* number of rgb mnemonics in table */
+    int		red,		/* rgb values */
+    int		green,
+    int		blue)
+{
+    int i;
+    xpmRgbName *rgb;
+
+    /*
+     * Just perform a dumb linear search over the rgb values of the color
+     * mnemonics.  One could speed things up by sorting the rgb values and
+     * using a binary search, or building a hash table, etc...
+     */
+    for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++)
+	if (red == rgb->r && green == rgb->g && blue == rgb->b)
+	    return rgb->name;
+
+    /* if not found return NULL */
+    return NULL;
+}
+
+/*
+ * Free the strings which have been malloc'ed in xpmReadRgbNames
+ */
+void
+xpmFreeRgbNames(
+    xpmRgbName	rgbn[],
+    int		rgbn_max)
+{
+    int i;
+    xpmRgbName *rgb;
+
+    for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++)
+	XpmFree(rgb->name);
+}
+
+#else					/* here comes the MSW part, the
+					 * second part of the  huge ifdef */
+
+#include "rgbtab.h"			/* hard coded rgb.txt table */
+
+int
+xpmReadRgbNames(
+    char	*rgb_fname,
+    xpmRgbName	 rgbn[])
+{
+    /*
+     * check for consistency???
+     * table has to be sorted for calls on strcasecmp
+     */
+    return (numTheRGBRecords);
+}
+
+/*
+ * MSW rgb values are made from 3 BYTEs, this is different from X XColor.red,
+ * which has something like #0303 for one color
+ */
+char *
+xpmGetRgbName(
+    xpmRgbName rgbn[],		/* rgb mnemonics from rgb text file
+				 * not used */
+    int		rgbn_max,	/* not used */
+    int		red, 		/* rgb values */
+    int		green,
+    int		blue)
+
+{
+    int i;
+    unsigned long rgbVal;
+
+    i = 0;
+    while (i < numTheRGBRecords) {
+	rgbVal = theRGBRecords[i].rgb;
+	if (GetRValue(rgbVal) == red &&
+	    GetGValue(rgbVal) == green &&
+	    GetBValue(rgbVal) == blue)
+	    return (theRGBRecords[i].name);
+	i++;
+    }
+    return (NULL);
+}
+
+/* used in XParseColor in simx.c */
+int
+xpmGetRGBfromName(
+    char	*inname,
+    int		*r,
+    int		*g,
+    int		*b)
+{
+    int left, right, middle;
+    int cmp;
+    unsigned long rgbVal;
+    char *name;
+    char *grey, *p;
+
+    name = xpmstrdup(inname);
+
+    /*
+     * the table in rgbtab.c has no names with spaces, and no grey, but a
+     * lot of gray
+     */
+    /* so first extract ' ' */
+    while (p = strchr(name, ' ')) {
+	while (*(p)) {			/* till eof of string */
+	    *p = *(p + 1);		/* copy to the left */
+	    p++;
+	}
+    }
+    /* fold to lower case */
+    p = name;
+    while (*p) {
+	*p = tolower(*p);
+	p++;
+    }
+
+    /*
+     * substitute Grey with Gray, else rgbtab.h would have more than 100
+     * 'duplicate' entries
+     */
+    if (grey = strstr(name, "grey"))
+	grey[2] = 'a';
+
+    /* binary search */
+    left = 0;
+    right = numTheRGBRecords - 1;
+    do {
+	middle = (left + right) / 2;
+	cmp = xpmstrcasecmp(name, theRGBRecords[middle].name);
+	if (cmp == 0) {
+	    rgbVal = theRGBRecords[middle].rgb;
+	    *r = GetRValue(rgbVal);
+	    *g = GetGValue(rgbVal);
+	    *b = GetBValue(rgbVal);
+	    free(name);
+	    return (1);
+	} else if (cmp < 0) {
+	    right = middle - 1;
+	} else {			/* > 0 */
+	    left = middle + 1;
+	}
+    } while (left <= right);
+
+    /*
+     * I don't like to run in a ColorInvalid error and to see no pixmap at
+     * all, so simply return a red pixel. Should be wrapped in an #ifdef
+     * HeDu
+     */
+
+    *r = 255;
+    *g = 0;
+    *b = 0;				/* red error pixel */
+
+    free(name);
+    return (1);
+}
+
+void
+xpmFreeRgbNames(
+    xpmRgbName	rgbn[],
+    int		rgbn_max)
+{
+    /* nothing to do */
+}
+
+#endif					/* MSW part */