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+/***********************************************************
+
+Copyright 1987, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+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 THE
+OPEN GROUP 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 The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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 PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+/* $Xorg: oscolor.c,v 1.4 2001/02/09 02:05:23 xorgcvs Exp $ */
+
+#ifndef USE_RGB_TXT
+
+#ifdef NDBM
+#include <ndbm.h>
+#else
+#ifdef SVR4
+#include <rpcsvc/dbm.h>
+#else
+#include <dbm.h>
+#endif
+#endif
+#include "rgb.h"
+#include "os.h"
+#include "opaque.h"
+
+/* Note that we are assuming there is only one database for all the screens. */
+
+#ifdef NDBM
+DBM *rgb_dbm = (DBM *)NULL;
+#else
+int rgb_dbm = 0;
+#endif
+
+extern void CopyISOLatin1Lowered();
+
+int
+OsInitColors()
+{
+ if (!rgb_dbm)
+ {
+#ifdef NDBM
+ rgb_dbm = dbm_open(rgbPath, 0, 0);
+#else
+ if (dbminit(rgbPath) == 0)
+ rgb_dbm = 1;
+#endif
+ if (!rgb_dbm) {
+ ErrorF( "Couldn't open RGB_DB '%s'\n", rgbPath );
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+
+/*ARGSUSED*/
+int
+OsLookupColor(screen, name, len, pred, pgreen, pblue)
+ int screen;
+ char *name;
+ unsigned len;
+ unsigned short *pred, *pgreen, *pblue;
+
+{
+ datum dbent;
+ RGB rgb;
+ char buf[64];
+ char *lowername;
+
+ if(!rgb_dbm)
+ return(0);
+
+ /* we use Xalloc here so that we can compile with cc without alloca
+ * when otherwise using gcc */
+ if (len < sizeof(buf))
+ lowername = buf;
+ else if (!(lowername = (char *)Xalloc(len + 1)))
+ return(0);
+ CopyISOLatin1Lowered ((unsigned char *) lowername, (unsigned char *) name,
+ (int)len);
+
+ dbent.dptr = lowername;
+ dbent.dsize = len;
+#ifdef NDBM
+ dbent = dbm_fetch(rgb_dbm, dbent);
+#else
+ dbent = fetch (dbent);
+#endif
+
+ if (len >= sizeof(buf))
+ Xfree(lowername);
+
+ if(dbent.dptr)
+ {
+ memmove((char *) &rgb, dbent.dptr, sizeof (RGB));
+ *pred = rgb.red;
+ *pgreen = rgb.green;
+ *pblue = rgb.blue;
+ return (1);
+ }
+ return(0);
+}
+
+#else /* USE_RGB_TXT */
+
+
+/*
+ * The dbm routines are a porting hassle. This implementation will do
+ * the same thing by reading the rgb.txt file directly, which is much
+ * more portable.
+ */
+
+#include <stdio.h>
+#include "os.h"
+#include "opaque.h"
+
+#define HASHSIZE 511
+
+typedef struct _dbEntry * dbEntryPtr;
+typedef struct _dbEntry {
+ dbEntryPtr link;
+ unsigned short red;
+ unsigned short green;
+ unsigned short blue;
+ char name[1]; /* some compilers complain if [0] */
+} dbEntry;
+
+
+extern void CopyISOLatin1Lowered();
+
+static dbEntryPtr hashTab[HASHSIZE];
+
+
+static dbEntryPtr
+lookup(name, len, create)
+ char *name;
+ int len;
+ Bool create;
+{
+ unsigned int h = 0, g;
+ dbEntryPtr entry, *prev;
+ char *str = name;
+
+ if (!(name = (char*)ALLOCATE_LOCAL(len +1))) return NULL;
+ CopyISOLatin1Lowered(name, str, len);
+ name[len] = '\0';
+
+ for(str = name; *str; str++) {
+ h = (h << 4) + *str;
+ if ((g = h) & 0xf0000000) h ^= (g >> 24);
+ h &= g;
+ }
+ h %= HASHSIZE;
+
+ if ( entry = hashTab[h] )
+ {
+ for( ; entry; prev = (dbEntryPtr*)entry, entry = entry->link )
+ if (! strcmp(name, entry->name) ) break;
+ }
+ else
+ prev = &(hashTab[h]);
+
+ if (!entry && create && (entry = (dbEntryPtr)Xalloc(sizeof(dbEntry) +len)))
+ {
+ *prev = entry;
+ entry->link = NULL;
+ strcpy( entry->name, name );
+ }
+
+ DEALLOCATE_LOCAL(name);
+
+ return entry;
+}
+
+
+Bool
+OsInitColors()
+{
+ FILE *rgb;
+ char *path;
+ char line[BUFSIZ];
+ char name[BUFSIZ];
+ int red, green, blue, lineno = 0;
+ dbEntryPtr entry;
+
+ static Bool was_here = FALSE;
+
+ if (!was_here)
+ {
+ path = (char*)ALLOCATE_LOCAL(strlen(rgbPath) +5);
+ strcpy(path, rgbPath);
+ strcat(path, ".txt");
+
+ if (!(rgb = fopen(path, "r")))
+ {
+ ErrorF( "Couldn't open RGB_DB '%s'\n", rgbPath );
+ DEALLOCATE_LOCAL(path);
+ return FALSE;
+ }
+
+ while(fgets(line, sizeof(line), rgb))
+ {
+ lineno++;
+ if (sscanf(line,"%d %d %d %[^\n]\n", &red, &green, &blue, name) == 4)
+ {
+ if (red >= 0 && red <= 0xff &&
+ green >= 0 && green <= 0xff &&
+ blue >= 0 && blue <= 0xff)
+ {
+ if (entry = lookup(name, strlen(name), TRUE))
+ {
+ entry->red = (red * 65535) / 255;
+ entry->green = (green * 65535) / 255;
+ entry->blue = (blue * 65535) / 255;
+ }
+ }
+ else
+ ErrorF("Value for \"%s\" out of range: %s:%d\n",
+ name, path, lineno);
+ }
+ else if (*line && *line != '#' && *line != '!')
+ ErrorF("Syntax Error: %s:%d\n", path, lineno);
+ }
+
+ fclose(rgb);
+ DEALLOCATE_LOCAL(path);
+
+ was_here = TRUE;
+ }
+
+ return TRUE;
+}
+
+
+
+Bool
+OsLookupColor(screen, name, len, pred, pgreen, pblue)
+ int screen;
+ char *name;
+ unsigned len;
+ unsigned short *pred, *pgreen, *pblue;
+
+{
+ dbEntryPtr entry;
+
+ if (entry = lookup(name, len, FALSE))
+ {
+ *pred = entry->red;
+ *pgreen = entry->green;
+ *pblue = entry->blue;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+#endif /* USE_RGB_TXT */
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