/* $XFree86: xc/programs/Xserver/os/oscolor.c,v 3.10 2003/07/16 01:39:03 dawes Exp $ */ /*********************************************************** 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 #else #ifdef SVR4 #include #else #include #endif #endif #include "rgb.h" #include #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( unsigned char * /*dest*/, unsigned char * /*source*/, int /*length*/); int OsInitColors(void) { 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(int screen, char *name, unsigned int len, unsigned short *pred, unsigned short *pgreen, unsigned short *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 #include #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( unsigned char * /*dest*/, unsigned char * /*source*/, int /*length*/); static dbEntryPtr hashTab[HASHSIZE]; static dbEntryPtr lookup(char *name, int len, Bool create) { unsigned int h = 0, g; dbEntryPtr entry, *prev = NULL; char *str = name; if (!(name = (char*)ALLOCATE_LOCAL(len +1))) return NULL; CopyISOLatin1Lowered((unsigned char *)name, (unsigned char *)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(void) { 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) { #ifndef __UNIXOS2__ path = (char*)ALLOCATE_LOCAL(strlen(rgbPath) +5); strcpy(path, rgbPath); strcat(path, ".txt"); #else char *tmp = (char*)__XOS2RedirRoot(rgbPath); path = (char*)ALLOCATE_LOCAL(strlen(tmp) +5); strcpy(path, tmp); strcat(path, ".txt"); #endif 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++; #ifndef __UNIXOS2__ if (sscanf(line,"%d %d %d %[^\n]\n", &red, &green, &blue, name) == 4) #else if (sscanf(line,"%d %d %d %[^\n\r]\n", &red, &green, &blue, name) == 4) #endif { 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 out of range: %s:%d\n", 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(int screen, char *name, unsigned int len, unsigned short *pred, unsigned short *pgreen, unsigned short *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 */