| /* |
| * 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 <limits.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <assert.h> |
| #include <expat.h> |
| #include <fcntl.h> |
| #include <math.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <dirent.h> |
| #include <fnmatch.h> |
| #include "xmlconfig.h" |
| #include "u_process.h" |
| |
| /* For systems like Hurd */ |
| #ifndef PATH_MAX |
| #define PATH_MAX 4096 |
| #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; |
| const char *kernelDriverName; |
| 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, *kernel = 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 if (!strcmp (attr[i], "kernel_driver")) kernel = attr[i+1]; |
| else XML_WARNING("unknown device attribute: %s.", attr[i]); |
| } |
| if (driver && strcmp (driver, data->driverName)) |
| data->ignoringDevice = data->inDevice; |
| else if (kernel && (!data->kernelDriverName || strcmp (kernel, data->kernelDriverName))) |
| 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); |
| } |
| } |
| |
| 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 |
| } |
| |
| /** \brief Parse the named configuration file */ |
| static void |
| parseOneConfigFile(struct OptConfData *data, const char *filename) |
| { |
| XML_Parser p; |
| |
| p = XML_ParserCreate (NULL); /* use encoding specified by file */ |
| XML_SetElementHandler (p, optConfStartElem, optConfEndElem); |
| XML_SetUserData (p, data); |
| data->parser = p; |
| data->name = filename; |
| data->ignoringDevice = 0; |
| data->ignoringApp = 0; |
| data->inDriConf = 0; |
| data->inDevice = 0; |
| data->inApp = 0; |
| data->inOption = 0; |
| |
| _parseOneConfigFile (p); |
| XML_ParserFree (p); |
| } |
| |
| static int |
| scandir_filter(const struct dirent *ent) |
| { |
| #ifndef DT_REG /* systems without d_type in dirent results */ |
| struct stat st; |
| |
| if ((lstat(ent->d_name, &st) != 0) || |
| (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))) |
| return 0; |
| #else |
| if (ent->d_type != DT_REG && ent->d_type != DT_LNK) |
| return 0; |
| #endif |
| |
| if (fnmatch("*.conf", ent->d_name, 0)) |
| return 0; |
| |
| return 1; |
| } |
| |
| /** \brief Parse configuration files in a directory */ |
| static void |
| parseConfigDir(struct OptConfData *data, const char *dirname) |
| { |
| int i, count; |
| struct dirent **entries = NULL; |
| |
| count = scandir(dirname, &entries, scandir_filter, alphasort); |
| if (count < 0) |
| return; |
| |
| for (i = 0; i < count; i++) { |
| char filename[PATH_MAX]; |
| |
| snprintf(filename, PATH_MAX, "%s/%s", dirname, entries[i]->d_name); |
| free(entries[i]); |
| |
| parseOneConfigFile(data, filename); |
| } |
| |
| free(entries); |
| } |
| |
| #ifndef SYSCONFDIR |
| #define SYSCONFDIR "/etc" |
| #endif |
| |
| #ifndef DATADIR |
| #define DATADIR "/usr/share" |
| #endif |
| |
| void |
| driParseConfigFiles(driOptionCache *cache, const driOptionCache *info, |
| int screenNum, const char *driverName, |
| const char *kernelDriverName) |
| { |
| char *home; |
| struct OptConfData userData; |
| |
| initOptionCache (cache, info); |
| |
| userData.cache = cache; |
| userData.screenNum = screenNum; |
| userData.driverName = driverName; |
| userData.kernelDriverName = kernelDriverName; |
| userData.execName = util_get_process_name(); |
| |
| parseConfigDir(&userData, DATADIR "/drirc.d"); |
| parseOneConfigFile(&userData, SYSCONFDIR "/drirc"); |
| |
| if ((home = getenv ("HOME"))) { |
| char filename[PATH_MAX]; |
| |
| snprintf(filename, PATH_MAX, "%s/.drirc", home); |
| parseOneConfigFile(&userData, filename); |
| } |
| } |
| |
| 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; |
| } |