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Diffstat (limited to 'src/util/xmlconfig.c')
| -rw-r--r-- | src/util/xmlconfig.c | 1110 |
1 files changed, 1110 insertions, 0 deletions
diff --git a/src/util/xmlconfig.c b/src/util/xmlconfig.c new file mode 100644 index 0000000000..9bd587b0e1 --- /dev/null +++ b/src/util/xmlconfig.c @@ -0,0 +1,1110 @@ +/* + * 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,args...) do { \ + __driUtilMessage ("Warning in %s line %d, column %d: "msg, data->name, \ + (int) XML_GetCurrentLineNumber(data->parser), \ + (int) XML_GetCurrentColumnNumber(data->parser), \ + 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,args...) do { \ + __driUtilMessage ("Error in %s line %d, column %d: "msg, data->name, \ + (int) XML_GetCurrentLineNumber(data->parser), \ + (int) XML_GetCurrentColumnNumber(data->parser), \ + 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,args...) 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), \ + 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[] = { + "application", "device", "driconf", "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; +} |