/* * XML DRI client-side driver configuration * Copyright (C) 2003 Felix Kuehling * * 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 * FELIX KUEHLING, OR ANY OTHER CONTRIBUTORS 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. * */ /** * \file xmlconfig.c * \brief Driver-independent client-side part of the XML configuration * \author Felix Kuehling */ #include <stdarg.h> #include <stdio.h> #include <string.h> #include <assert.h> #include <expat.h> #include <fcntl.h> #include <math.h> #include <unistd.h> #include <errno.h> #include "xmlconfig.h" #undef GET_PROGRAM_NAME #if (defined(__GNU_LIBRARY__) || defined(__GLIBC__)) && !defined(__UCLIBC__) # if !defined(__GLIBC__) || (__GLIBC__ < 2) /* These aren't declared in any libc5 header */ extern char *program_invocation_name, *program_invocation_short_name; # endif # define GET_PROGRAM_NAME() program_invocation_short_name #elif defined(__CYGWIN__) # define GET_PROGRAM_NAME() program_invocation_short_name #elif defined(__FreeBSD__) && (__FreeBSD__ >= 2) # include <osreldate.h> # if (__FreeBSD_version >= 440000) # include <stdlib.h> # define GET_PROGRAM_NAME() getprogname() # endif #elif defined(__NetBSD__) && defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 106000100) # include <stdlib.h> # define GET_PROGRAM_NAME() getprogname() #elif defined(__DragonFly__) # include <stdlib.h> # define GET_PROGRAM_NAME() getprogname() #elif defined(__APPLE__) # include <stdlib.h> # define GET_PROGRAM_NAME() getprogname() #elif defined(__sun) /* Solaris has getexecname() which returns the full path - return just the basename to match BSD getprogname() */ # include <stdlib.h> # include <libgen.h> static const char * __getProgramName() { static const char *progname; if (progname == NULL) { const char *e = getexecname(); if (e != NULL) { /* Have to make a copy since getexecname can return a readonly string, but basename expects to be able to modify its arg. */ char *n = strdup(e); if (n != NULL) { progname = basename(n); } } } return progname; } # define GET_PROGRAM_NAME() __getProgramName() #endif #if !defined(GET_PROGRAM_NAME) # if defined(__OpenBSD__) || defined(NetBSD) || defined(__UCLIBC__) || defined(ANDROID) /* This is a hack. It's said to work on OpenBSD, NetBSD and GNU. * Rogelio M.Serrano Jr. reported it's also working with UCLIBC. It's * used as a last resort, if there is no documented facility available. */ static const char * __getProgramName() { extern const char *__progname; char * arg = strrchr(__progname, '/'); if (arg) return arg+1; else return __progname; } # define GET_PROGRAM_NAME() __getProgramName() # else # define GET_PROGRAM_NAME() "" # warning "Per application configuration won't work with your OS version." # endif #endif /** \brief Find an option in an option cache with the name as key */ static uint32_t findOption(const driOptionCache *cache, const char *name) { uint32_t len = strlen (name); uint32_t size = 1 << cache->tableSize, mask = size - 1; uint32_t hash = 0; uint32_t i, shift; /* compute a hash from the variable length name */ for (i = 0, shift = 0; i < len; ++i, shift = (shift+8) & 31) hash += (uint32_t)name[i] << shift; hash *= hash; hash = (hash >> (16-cache->tableSize/2)) & mask; /* this is just the starting point of the linear search for the option */ for (i = 0; i < size; ++i, hash = (hash+1) & mask) { /* if we hit an empty entry then the option is not defined (yet) */ if (cache->info[hash].name == 0) break; else if (!strcmp (name, cache->info[hash].name)) break; } /* this assertion fails if the hash table is full */ assert (i < size); return hash; } /** \brief Like strdup but using malloc and with error checking. */ #define XSTRDUP(dest,source) do { \ uint32_t len = strlen (source); \ if (!(dest = malloc(len+1))) { \ fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__); \ abort(); \ } \ memcpy (dest, source, len+1); \ } while (0) static int compare (const void *a, const void *b) { return strcmp (*(char *const*)a, *(char *const*)b); } /** \brief Binary search in a string array. */ static uint32_t bsearchStr (const XML_Char *name, const XML_Char *elems[], uint32_t count) { const XML_Char **found; found = bsearch (&name, elems, count, sizeof (XML_Char *), compare); if (found) return found - elems; else return count; } /** \brief Locale-independent integer parser. * * Works similar to strtol. Leading space is NOT skipped. The input * number may have an optional sign. Radix is specified by base. If * base is 0 then decimal is assumed unless the input number is * prefixed by 0x or 0X for hexadecimal or 0 for octal. After * returning tail points to the first character that is not part of * the integer number. If no number was found then tail points to the * start of the input string. */ static int strToI(const XML_Char *string, const XML_Char **tail, int base) { int radix = base == 0 ? 10 : base; int result = 0; int sign = 1; bool numberFound = false; const XML_Char *start = string; assert (radix >= 2 && radix <= 36); if (*string == '-') { sign = -1; string++; } else if (*string == '+') string++; if (base == 0 && *string == '0') { numberFound = true; if (*(string+1) == 'x' || *(string+1) == 'X') { radix = 16; string += 2; } else { radix = 8; string++; } } do { int digit = -1; if (radix <= 10) { if (*string >= '0' && *string < '0' + radix) digit = *string - '0'; } else { if (*string >= '0' && *string <= '9') digit = *string - '0'; else if (*string >= 'a' && *string < 'a' + radix - 10) digit = *string - 'a' + 10; else if (*string >= 'A' && *string < 'A' + radix - 10) digit = *string - 'A' + 10; } if (digit != -1) { numberFound = true; result = radix*result + digit; string++; } else break; } while (true); *tail = numberFound ? string : start; return sign * result; } /** \brief Locale-independent floating-point parser. * * Works similar to strtod. Leading space is NOT skipped. The input * number may have an optional sign. '.' is interpreted as decimal * point and may occur at most once. Optionally the number may end in * [eE]<exponent>, where <exponent> is an integer as recognized by * strToI. In that case the result is number * 10^exponent. After * returning tail points to the first character that is not part of * the floating point number. If no number was found then tail points * to the start of the input string. * * Uses two passes for maximum accuracy. */ static float strToF(const XML_Char *string, const XML_Char **tail) { int nDigits = 0, pointPos, exponent; float sign = 1.0f, result = 0.0f, scale; const XML_Char *start = string, *numStart; /* sign */ if (*string == '-') { sign = -1.0f; string++; } else if (*string == '+') string++; /* first pass: determine position of decimal point, number of * digits, exponent and the end of the number. */ numStart = string; while (*string >= '0' && *string <= '9') { string++; nDigits++; } pointPos = nDigits; if (*string == '.') { string++; while (*string >= '0' && *string <= '9') { string++; nDigits++; } } if (nDigits == 0) { /* no digits, no number */ *tail = start; return 0.0f; } *tail = string; if (*string == 'e' || *string == 'E') { const XML_Char *expTail; exponent = strToI (string+1, &expTail, 10); if (expTail == string+1) exponent = 0; else *tail = expTail; } else exponent = 0; string = numStart; /* scale of the first digit */ scale = sign * (float)pow (10.0, (double)(pointPos-1 + exponent)); /* second pass: parse digits */ do { if (*string != '.') { assert (*string >= '0' && *string <= '9'); result += scale * (float)(*string - '0'); scale *= 0.1f; nDigits--; } string++; } while (nDigits > 0); return result; } /** \brief Parse a value of a given type. */ static unsigned char parseValue(driOptionValue *v, driOptionType type, const XML_Char *string) { const XML_Char *tail = NULL; /* skip leading white-space */ string += strspn (string, " \f\n\r\t\v"); switch (type) { case DRI_BOOL: if (!strcmp (string, "false")) { v->_bool = false; tail = string + 5; } else if (!strcmp (string, "true")) { v->_bool = true; tail = string + 4; } else return false; break; case DRI_ENUM: /* enum is just a special integer */ case DRI_INT: v->_int = strToI (string, &tail, 0); break; case DRI_FLOAT: v->_float = strToF (string, &tail); break; case DRI_STRING: free (v->_string); v->_string = strndup(string, STRING_CONF_MAXLEN); return true; } if (tail == string) return false; /* empty string (or containing only white-space) */ /* skip trailing white space */ if (*tail) tail += strspn (tail, " \f\n\r\t\v"); if (*tail) return false; /* something left over that is not part of value */ return true; } /** \brief Parse a list of ranges of type info->type. */ static unsigned char parseRanges(driOptionInfo *info, const XML_Char *string) { XML_Char *cp, *range; uint32_t nRanges, i; driOptionRange *ranges; XSTRDUP (cp, string); /* pass 1: determine the number of ranges (number of commas + 1) */ range = cp; for (nRanges = 1; *range; ++range) if (*range == ',') ++nRanges; if ((ranges = malloc(nRanges*sizeof(driOptionRange))) == NULL) { fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__); abort(); } /* pass 2: parse all ranges into preallocated array */ range = cp; for (i = 0; i < nRanges; ++i) { XML_Char *end, *sep; assert (range); end = strchr (range, ','); if (end) *end = '\0'; sep = strchr (range, ':'); if (sep) { /* non-empty interval */ *sep = '\0'; if (!parseValue (&ranges[i].start, info->type, range) || !parseValue (&ranges[i].end, info->type, sep+1)) break; if (info->type == DRI_INT && ranges[i].start._int > ranges[i].end._int) break; if (info->type == DRI_FLOAT && ranges[i].start._float > ranges[i].end._float) break; } else { /* empty interval */ if (!parseValue (&ranges[i].start, info->type, range)) break; ranges[i].end = ranges[i].start; } if (end) range = end+1; else range = NULL; } free(cp); if (i < nRanges) { free(ranges); return false; } else assert (range == NULL); info->nRanges = nRanges; info->ranges = ranges; return true; } /** \brief Check if a value is in one of info->ranges. */ static bool checkValue(const driOptionValue *v, const driOptionInfo *info) { uint32_t i; assert (info->type != DRI_BOOL); /* should be caught by the parser */ if (info->nRanges == 0) return true; switch (info->type) { case DRI_ENUM: /* enum is just a special integer */ case DRI_INT: for (i = 0; i < info->nRanges; ++i) if (v->_int >= info->ranges[i].start._int && v->_int <= info->ranges[i].end._int) return true; break; case DRI_FLOAT: for (i = 0; i < info->nRanges; ++i) if (v->_float >= info->ranges[i].start._float && v->_float <= info->ranges[i].end._float) return true; break; case DRI_STRING: break; default: assert (0); /* should never happen */ } return false; } /** * Print message to \c stderr if the \c LIBGL_DEBUG environment variable * is set. * * Is called from the drivers. * * \param f \c printf like format string. */ static void __driUtilMessage(const char *f, ...) { va_list args; const char *libgl_debug; libgl_debug=getenv("LIBGL_DEBUG"); if (libgl_debug && !strstr(libgl_debug, "quiet")) { fprintf(stderr, "libGL: "); va_start(args, f); vfprintf(stderr, f, args); va_end(args); fprintf(stderr, "\n"); } } /** \brief Output a warning message. */ #define XML_WARNING1(msg) do {\ __driUtilMessage ("Warning in %s line %d, column %d: "msg, data->name, \ (int) XML_GetCurrentLineNumber(data->parser), \ (int) XML_GetCurrentColumnNumber(data->parser)); \ } while (0) #define XML_WARNING(msg, ...) do { \ __driUtilMessage ("Warning in %s line %d, column %d: "msg, data->name, \ (int) XML_GetCurrentLineNumber(data->parser), \ (int) XML_GetCurrentColumnNumber(data->parser), \ ##__VA_ARGS__); \ } while (0) /** \brief Output an error message. */ #define XML_ERROR1(msg) do { \ __driUtilMessage ("Error in %s line %d, column %d: "msg, data->name, \ (int) XML_GetCurrentLineNumber(data->parser), \ (int) XML_GetCurrentColumnNumber(data->parser)); \ } while (0) #define XML_ERROR(msg, ...) do { \ __driUtilMessage ("Error in %s line %d, column %d: "msg, data->name, \ (int) XML_GetCurrentLineNumber(data->parser), \ (int) XML_GetCurrentColumnNumber(data->parser), \ ##__VA_ARGS__); \ } while (0) /** \brief Output a fatal error message and abort. */ #define XML_FATAL1(msg) do { \ fprintf (stderr, "Fatal error in %s line %d, column %d: "msg"\n", \ data->name, \ (int) XML_GetCurrentLineNumber(data->parser), \ (int) XML_GetCurrentColumnNumber(data->parser)); \ abort();\ } while (0) #define XML_FATAL(msg, ...) do { \ fprintf (stderr, "Fatal error in %s line %d, column %d: "msg"\n", \ data->name, \ (int) XML_GetCurrentLineNumber(data->parser), \ (int) XML_GetCurrentColumnNumber(data->parser), \ ##__VA_ARGS__); \ abort();\ } while (0) /** \brief Parser context for __driConfigOptions. */ struct OptInfoData { const char *name; XML_Parser parser; driOptionCache *cache; bool inDriInfo; bool inSection; bool inDesc; bool inOption; bool inEnum; int curOption; }; /** \brief Elements in __driConfigOptions. */ enum OptInfoElem { OI_DESCRIPTION = 0, OI_DRIINFO, OI_ENUM, OI_OPTION, OI_SECTION, OI_COUNT }; static const XML_Char *OptInfoElems[] = { "description", "driinfo", "enum", "option", "section" }; /** \brief Parse attributes of an enum element. * * We're not actually interested in the data. Just make sure this is ok * for external configuration tools. */ static void parseEnumAttr(struct OptInfoData *data, const XML_Char **attr) { uint32_t i; const XML_Char *value = NULL, *text = NULL; driOptionValue v; uint32_t opt = data->curOption; for (i = 0; attr[i]; i += 2) { if (!strcmp (attr[i], "value")) value = attr[i+1]; else if (!strcmp (attr[i], "text")) text = attr[i+1]; else XML_FATAL("illegal enum attribute: %s.", attr[i]); } if (!value) XML_FATAL1 ("value attribute missing in enum."); if (!text) XML_FATAL1 ("text attribute missing in enum."); if (!parseValue (&v, data->cache->info[opt].type, value)) XML_FATAL ("illegal enum value: %s.", value); if (!checkValue (&v, &data->cache->info[opt])) XML_FATAL ("enum value out of valid range: %s.", value); } /** \brief Parse attributes of a description element. * * We're not actually interested in the data. Just make sure this is ok * for external configuration tools. */ static void parseDescAttr(struct OptInfoData *data, const XML_Char **attr) { uint32_t i; const XML_Char *lang = NULL, *text = NULL; for (i = 0; attr[i]; i += 2) { if (!strcmp (attr[i], "lang")) lang = attr[i+1]; else if (!strcmp (attr[i], "text")) text = attr[i+1]; else XML_FATAL("illegal description attribute: %s.", attr[i]); } if (!lang) XML_FATAL1 ("lang attribute missing in description."); if (!text) XML_FATAL1 ("text attribute missing in description."); } /** \brief Parse attributes of an option element. */ static void parseOptInfoAttr(struct OptInfoData *data, const XML_Char **attr) { enum OptAttr {OA_DEFAULT = 0, OA_NAME, OA_TYPE, OA_VALID, OA_COUNT}; static const XML_Char *optAttr[] = {"default", "name", "type", "valid"}; const XML_Char *attrVal[OA_COUNT] = {NULL, NULL, NULL, NULL}; const char *defaultVal; driOptionCache *cache = data->cache; uint32_t opt, i; for (i = 0; attr[i]; i += 2) { uint32_t attrName = bsearchStr (attr[i], optAttr, OA_COUNT); if (attrName >= OA_COUNT) XML_FATAL ("illegal option attribute: %s", attr[i]); attrVal[attrName] = attr[i+1]; } if (!attrVal[OA_NAME]) XML_FATAL1 ("name attribute missing in option."); if (!attrVal[OA_TYPE]) XML_FATAL1 ("type attribute missing in option."); if (!attrVal[OA_DEFAULT]) XML_FATAL1 ("default attribute missing in option."); opt = findOption (cache, attrVal[OA_NAME]); if (cache->info[opt].name) XML_FATAL ("option %s redefined.", attrVal[OA_NAME]); data->curOption = opt; XSTRDUP (cache->info[opt].name, attrVal[OA_NAME]); if (!strcmp (attrVal[OA_TYPE], "bool")) cache->info[opt].type = DRI_BOOL; else if (!strcmp (attrVal[OA_TYPE], "enum")) cache->info[opt].type = DRI_ENUM; else if (!strcmp (attrVal[OA_TYPE], "int")) cache->info[opt].type = DRI_INT; else if (!strcmp (attrVal[OA_TYPE], "float")) cache->info[opt].type = DRI_FLOAT; else if (!strcmp (attrVal[OA_TYPE], "string")) cache->info[opt].type = DRI_STRING; else XML_FATAL ("illegal type in option: %s.", attrVal[OA_TYPE]); defaultVal = getenv (cache->info[opt].name); if (defaultVal != NULL) { /* don't use XML_WARNING, we want the user to see this! */ fprintf (stderr, "ATTENTION: default value of option %s overridden by environment.\n", cache->info[opt].name); } else defaultVal = attrVal[OA_DEFAULT]; if (!parseValue (&cache->values[opt], cache->info[opt].type, defaultVal)) XML_FATAL ("illegal default value for %s: %s.", cache->info[opt].name, defaultVal); if (attrVal[OA_VALID]) { if (cache->info[opt].type == DRI_BOOL) XML_FATAL1 ("boolean option with valid attribute."); if (!parseRanges (&cache->info[opt], attrVal[OA_VALID])) XML_FATAL ("illegal valid attribute: %s.", attrVal[OA_VALID]); if (!checkValue (&cache->values[opt], &cache->info[opt])) XML_FATAL ("default value out of valid range '%s': %s.", attrVal[OA_VALID], defaultVal); } else if (cache->info[opt].type == DRI_ENUM) { XML_FATAL1 ("valid attribute missing in option (mandatory for enums)."); } else { cache->info[opt].nRanges = 0; cache->info[opt].ranges = NULL; } } /** \brief Handler for start element events. */ static void optInfoStartElem(void *userData, const XML_Char *name, const XML_Char **attr) { struct OptInfoData *data = (struct OptInfoData *)userData; enum OptInfoElem elem = bsearchStr (name, OptInfoElems, OI_COUNT); switch (elem) { case OI_DRIINFO: if (data->inDriInfo) XML_FATAL1 ("nested <driinfo> elements."); if (attr[0]) XML_FATAL1 ("attributes specified on <driinfo> element."); data->inDriInfo = true; break; case OI_SECTION: if (!data->inDriInfo) XML_FATAL1 ("<section> must be inside <driinfo>."); if (data->inSection) XML_FATAL1 ("nested <section> elements."); if (attr[0]) XML_FATAL1 ("attributes specified on <section> element."); data->inSection = true; break; case OI_DESCRIPTION: if (!data->inSection && !data->inOption) XML_FATAL1 ("<description> must be inside <description> or <option."); if (data->inDesc) XML_FATAL1 ("nested <description> elements."); data->inDesc = true; parseDescAttr (data, attr); break; case OI_OPTION: if (!data->inSection) XML_FATAL1 ("<option> must be inside <section>."); if (data->inDesc) XML_FATAL1 ("<option> nested in <description> element."); if (data->inOption) XML_FATAL1 ("nested <option> elements."); data->inOption = true; parseOptInfoAttr (data, attr); break; case OI_ENUM: if (!(data->inOption && data->inDesc)) XML_FATAL1 ("<enum> must be inside <option> and <description>."); if (data->inEnum) XML_FATAL1 ("nested <enum> elements."); data->inEnum = true; parseEnumAttr (data, attr); break; default: XML_FATAL ("unknown element: %s.", name); } } /** \brief Handler for end element events. */ static void optInfoEndElem(void *userData, const XML_Char *name) { struct OptInfoData *data = (struct OptInfoData *)userData; enum OptInfoElem elem = bsearchStr (name, OptInfoElems, OI_COUNT); switch (elem) { case OI_DRIINFO: data->inDriInfo = false; break; case OI_SECTION: data->inSection = false; break; case OI_DESCRIPTION: data->inDesc = false; break; case OI_OPTION: data->inOption = false; break; case OI_ENUM: data->inEnum = false; break; default: assert (0); /* should have been caught by StartElem */ } } void driParseOptionInfo(driOptionCache *info, const char *configOptions) { XML_Parser p; int status; struct OptInfoData userData; struct OptInfoData *data = &userData; /* Make the hash table big enough to fit more than the maximum number of * config options we've ever seen in a driver. */ info->tableSize = 6; info->info = calloc(1 << info->tableSize, sizeof (driOptionInfo)); info->values = calloc(1 << info->tableSize, sizeof (driOptionValue)); if (info->info == NULL || info->values == NULL) { fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__); abort(); } p = XML_ParserCreate ("UTF-8"); /* always UTF-8 */ XML_SetElementHandler (p, optInfoStartElem, optInfoEndElem); XML_SetUserData (p, data); userData.name = "__driConfigOptions"; userData.parser = p; userData.cache = info; userData.inDriInfo = false; userData.inSection = false; userData.inDesc = false; userData.inOption = false; userData.inEnum = false; userData.curOption = -1; status = XML_Parse (p, configOptions, strlen (configOptions), 1); if (!status) XML_FATAL ("%s.", XML_ErrorString(XML_GetErrorCode(p))); XML_ParserFree (p); } /** \brief Parser context for configuration files. */ struct OptConfData { const char *name; XML_Parser parser; driOptionCache *cache; int screenNum; const char *driverName, *execName; uint32_t ignoringDevice; uint32_t ignoringApp; uint32_t inDriConf; uint32_t inDevice; uint32_t inApp; uint32_t inOption; }; /** \brief Elements in configuration files. */ enum OptConfElem { OC_APPLICATION = 0, OC_DEVICE, OC_DRICONF, OC_OPTION, OC_COUNT }; static const XML_Char *OptConfElems[] = { [OC_APPLICATION] = "application", [OC_DEVICE] = "device", [OC_DRICONF] = "driconf", [OC_OPTION] = "option", }; /** \brief Parse attributes of a device element. */ static void parseDeviceAttr(struct OptConfData *data, const XML_Char **attr) { uint32_t i; const XML_Char *driver = NULL, *screen = NULL; for (i = 0; attr[i]; i += 2) { if (!strcmp (attr[i], "driver")) driver = attr[i+1]; else if (!strcmp (attr[i], "screen")) screen = attr[i+1]; else XML_WARNING("unknown device attribute: %s.", attr[i]); } if (driver && strcmp (driver, data->driverName)) data->ignoringDevice = data->inDevice; else if (screen) { driOptionValue screenNum; if (!parseValue (&screenNum, DRI_INT, screen)) XML_WARNING("illegal screen number: %s.", screen); else if (screenNum._int != data->screenNum) data->ignoringDevice = data->inDevice; } } /** \brief Parse attributes of an application element. */ static void parseAppAttr(struct OptConfData *data, const XML_Char **attr) { uint32_t i; const XML_Char *exec = NULL; for (i = 0; attr[i]; i += 2) { if (!strcmp (attr[i], "name")) /* not needed here */; else if (!strcmp (attr[i], "executable")) exec = attr[i+1]; else XML_WARNING("unknown application attribute: %s.", attr[i]); } if (exec && strcmp (exec, data->execName)) data->ignoringApp = data->inApp; } /** \brief Parse attributes of an option element. */ static void parseOptConfAttr(struct OptConfData *data, const XML_Char **attr) { uint32_t i; const XML_Char *name = NULL, *value = NULL; for (i = 0; attr[i]; i += 2) { if (!strcmp (attr[i], "name")) name = attr[i+1]; else if (!strcmp (attr[i], "value")) value = attr[i+1]; else XML_WARNING("unknown option attribute: %s.", attr[i]); } if (!name) XML_WARNING1 ("name attribute missing in option."); if (!value) XML_WARNING1 ("value attribute missing in option."); if (name && value) { driOptionCache *cache = data->cache; uint32_t opt = findOption (cache, name); if (cache->info[opt].name == NULL) /* don't use XML_WARNING, drirc defines options for all drivers, * but not all drivers support them */ return; else if (getenv (cache->info[opt].name)) /* don't use XML_WARNING, we want the user to see this! */ fprintf (stderr, "ATTENTION: option value of option %s ignored.\n", cache->info[opt].name); else if (!parseValue (&cache->values[opt], cache->info[opt].type, value)) XML_WARNING ("illegal option value: %s.", value); } } /** \brief Handler for start element events. */ static void optConfStartElem(void *userData, const XML_Char *name, const XML_Char **attr) { struct OptConfData *data = (struct OptConfData *)userData; enum OptConfElem elem = bsearchStr (name, OptConfElems, OC_COUNT); switch (elem) { case OC_DRICONF: if (data->inDriConf) XML_WARNING1 ("nested <driconf> elements."); if (attr[0]) XML_WARNING1 ("attributes specified on <driconf> element."); data->inDriConf++; break; case OC_DEVICE: if (!data->inDriConf) XML_WARNING1 ("<device> should be inside <driconf>."); if (data->inDevice) XML_WARNING1 ("nested <device> elements."); data->inDevice++; if (!data->ignoringDevice && !data->ignoringApp) parseDeviceAttr (data, attr); break; case OC_APPLICATION: if (!data->inDevice) XML_WARNING1 ("<application> should be inside <device>."); if (data->inApp) XML_WARNING1 ("nested <application> elements."); data->inApp++; if (!data->ignoringDevice && !data->ignoringApp) parseAppAttr (data, attr); break; case OC_OPTION: if (!data->inApp) XML_WARNING1 ("<option> should be inside <application>."); if (data->inOption) XML_WARNING1 ("nested <option> elements."); data->inOption++; if (!data->ignoringDevice && !data->ignoringApp) parseOptConfAttr (data, attr); break; default: XML_WARNING ("unknown element: %s.", name); } } /** \brief Handler for end element events. */ static void optConfEndElem(void *userData, const XML_Char *name) { struct OptConfData *data = (struct OptConfData *)userData; enum OptConfElem elem = bsearchStr (name, OptConfElems, OC_COUNT); switch (elem) { case OC_DRICONF: data->inDriConf--; break; case OC_DEVICE: if (data->inDevice-- == data->ignoringDevice) data->ignoringDevice = 0; break; case OC_APPLICATION: if (data->inApp-- == data->ignoringApp) data->ignoringApp = 0; break; case OC_OPTION: data->inOption--; break; default: /* unknown element, warning was produced on start tag */; } } /** \brief Initialize an option cache based on info */ static void initOptionCache(driOptionCache *cache, const driOptionCache *info) { unsigned i, size = 1 << info->tableSize; cache->info = info->info; cache->tableSize = info->tableSize; cache->values = malloc((1<<info->tableSize) * sizeof (driOptionValue)); if (cache->values == NULL) { fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__); abort(); } memcpy (cache->values, info->values, (1<<info->tableSize) * sizeof (driOptionValue)); for (i = 0; i < size; ++i) { if (cache->info[i].type == DRI_STRING) XSTRDUP(cache->values[i]._string, info->values[i]._string); } } /** \brief Parse the named configuration file */ static void parseOneConfigFile(XML_Parser p) { #define BUF_SIZE 0x1000 struct OptConfData *data = (struct OptConfData *)XML_GetUserData (p); int status; int fd; if ((fd = open (data->name, O_RDONLY)) == -1) { __driUtilMessage ("Can't open configuration file %s: %s.", data->name, strerror (errno)); return; } while (1) { int bytesRead; void *buffer = XML_GetBuffer (p, BUF_SIZE); if (!buffer) { __driUtilMessage ("Can't allocate parser buffer."); break; } bytesRead = read (fd, buffer, BUF_SIZE); if (bytesRead == -1) { __driUtilMessage ("Error reading from configuration file %s: %s.", data->name, strerror (errno)); break; } status = XML_ParseBuffer (p, bytesRead, bytesRead == 0); if (!status) { XML_ERROR ("%s.", XML_ErrorString(XML_GetErrorCode(p))); break; } if (bytesRead == 0) break; } close (fd); #undef BUF_SIZE } #ifndef SYSCONFDIR #define SYSCONFDIR "/etc" #endif void driParseConfigFiles(driOptionCache *cache, const driOptionCache *info, int screenNum, const char *driverName) { char *filenames[2] = { SYSCONFDIR "/drirc", NULL}; char *home; uint32_t i; struct OptConfData userData; initOptionCache (cache, info); userData.cache = cache; userData.screenNum = screenNum; userData.driverName = driverName; userData.execName = GET_PROGRAM_NAME(); if ((home = getenv ("HOME"))) { uint32_t len = strlen (home); filenames[1] = malloc(len + 7+1); if (filenames[1] == NULL) __driUtilMessage ("Can't allocate memory for %s/.drirc.", home); else { memcpy (filenames[1], home, len); memcpy (filenames[1] + len, "/.drirc", 7+1); } } for (i = 0; i < 2; ++i) { XML_Parser p; if (filenames[i] == NULL) continue; p = XML_ParserCreate (NULL); /* use encoding specified by file */ XML_SetElementHandler (p, optConfStartElem, optConfEndElem); XML_SetUserData (p, &userData); userData.parser = p; userData.name = filenames[i]; userData.ignoringDevice = 0; userData.ignoringApp = 0; userData.inDriConf = 0; userData.inDevice = 0; userData.inApp = 0; userData.inOption = 0; parseOneConfigFile (p); XML_ParserFree (p); } free(filenames[1]); } void driDestroyOptionInfo(driOptionCache *info) { driDestroyOptionCache(info); if (info->info) { uint32_t i, size = 1 << info->tableSize; for (i = 0; i < size; ++i) { if (info->info[i].name) { free(info->info[i].name); free(info->info[i].ranges); } } free(info->info); } } void driDestroyOptionCache(driOptionCache *cache) { if (cache->info) { unsigned i, size = 1 << cache->tableSize; for (i = 0; i < size; ++i) { if (cache->info[i].type == DRI_STRING) free(cache->values[i]._string); } } free(cache->values); } unsigned char driCheckOption(const driOptionCache *cache, const char *name, driOptionType type) { uint32_t i = findOption (cache, name); return cache->info[i].name != NULL && cache->info[i].type == type; } unsigned char driQueryOptionb(const driOptionCache *cache, const char *name) { uint32_t i = findOption (cache, name); /* make sure the option is defined and has the correct type */ assert (cache->info[i].name != NULL); assert (cache->info[i].type == DRI_BOOL); return cache->values[i]._bool; } int driQueryOptioni(const driOptionCache *cache, const char *name) { uint32_t i = findOption (cache, name); /* make sure the option is defined and has the correct type */ assert (cache->info[i].name != NULL); assert (cache->info[i].type == DRI_INT || cache->info[i].type == DRI_ENUM); return cache->values[i]._int; } float driQueryOptionf(const driOptionCache *cache, const char *name) { uint32_t i = findOption (cache, name); /* make sure the option is defined and has the correct type */ assert (cache->info[i].name != NULL); assert (cache->info[i].type == DRI_FLOAT); return cache->values[i]._float; } char * driQueryOptionstr(const driOptionCache *cache, const char *name) { uint32_t i = findOption (cache, name); /* make sure the option is defined and has the correct type */ assert (cache->info[i].name != NULL); assert (cache->info[i].type == DRI_STRING); return cache->values[i]._string; }