| /* |
| * 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 "glheader.h" |
| |
| #include <string.h> |
| #include <assert.h> |
| #include <expat.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include "imports.h" |
| #include "dri_util.h" |
| #include "xmlconfig.h" |
| |
| /* |
| * OS dependent ways of getting the name of the running program |
| */ |
| #if (defined(__unix__) || defined(unix)) && !defined(USG) |
| #include <sys/param.h> |
| #endif |
| |
| #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(__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(__sun) |
| /* Solaris has getexecname() which returns the full path - return just |
| the basename to match BSD getprogname() */ |
| # include <stdlib.h> |
| # include <libgen.h> |
| # define GET_PROGRAM_NAME() basename(getexecname()) |
| #endif |
| |
| #if !defined(GET_PROGRAM_NAME) |
| # if defined(OpenBSD) || defined(NetBSD) || defined(__UCLIBC__) |
| /* 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 GLuint findOption (const driOptionCache *cache, const char *name) { |
| GLuint len = strlen (name); |
| GLuint size = 1 << cache->tableSize, mask = size - 1; |
| GLuint hash = 0; |
| GLuint i, shift; |
| |
| /* compute a hash from the variable length name */ |
| for (i = 0, shift = 0; i < len; ++i, shift = (shift+8) & 31) |
| hash += (GLuint)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 Count the real number of options in an option cache */ |
| static GLuint countOptions (const driOptionCache *cache) { |
| GLuint size = 1 << cache->tableSize; |
| GLuint i, count = 0; |
| for (i = 0; i < size; ++i) |
| if (cache->info[i].name) |
| count++; |
| return count; |
| } |
| |
| /** \brief Like strdup but using MALLOC and with error checking. */ |
| #define XSTRDUP(dest,source) do { \ |
| GLuint 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 GLuint bsearchStr (const XML_Char *name, |
| const XML_Char *elems[], GLuint 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 GLint strToI (const XML_Char *string, const XML_Char **tail, int base) { |
| GLint radix = base == 0 ? 10 : base; |
| GLint result = 0; |
| GLint sign = 1; |
| GLboolean numberFound = GL_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 = GL_TRUE; |
| if (*(string+1) == 'x' || *(string+1) == 'X') { |
| radix = 16; |
| string += 2; |
| } else { |
| radix = 8; |
| string++; |
| } |
| } |
| do { |
| GLint 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 = GL_TRUE; |
| result = radix*result + digit; |
| string++; |
| } else |
| break; |
| } while (GL_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 occor 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 GLfloat strToF (const XML_Char *string, const XML_Char **tail) { |
| GLint nDigits = 0, pointPos, exponent; |
| GLfloat 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 * (GLfloat)pow (10.0, (GLdouble)(pointPos-1 + exponent)); |
| |
| /* second pass: parse digits */ |
| do { |
| if (*string != '.') { |
| assert (*string >= '0' && *string <= '9'); |
| result += scale * (GLfloat)(*string - '0'); |
| scale *= 0.1f; |
| nDigits--; |
| } |
| string++; |
| } while (nDigits > 0); |
| |
| return result; |
| } |
| |
| /** \brief Parse a value of a given type. */ |
| static GLboolean 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 = GL_FALSE; |
| tail = string + 5; |
| } else if (!strcmp (string, "true")) { |
| v->_bool = GL_TRUE; |
| tail = string + 4; |
| } |
| else |
| return GL_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; |
| } |
| |
| if (tail == string) |
| return GL_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 GL_FALSE; /* something left over that is not part of value */ |
| |
| return GL_TRUE; |
| } |
| |
| /** \brief Parse a list of ranges of type info->type. */ |
| static GLboolean parseRanges (driOptionInfo *info, const XML_Char *string) { |
| XML_Char *cp, *range; |
| GLuint 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 GL_FALSE; |
| } else |
| assert (range == NULL); |
| |
| info->nRanges = nRanges; |
| info->ranges = ranges; |
| return GL_TRUE; |
| } |
| |
| /** \brief Check if a value is in one of info->ranges. */ |
| static GLboolean checkValue (const driOptionValue *v, const driOptionInfo *info) { |
| GLuint i; |
| assert (info->type != DRI_BOOL); /* should be caught by the parser */ |
| if (info->nRanges == 0) |
| return GL_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 GL_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 GL_TRUE; |
| break; |
| default: |
| assert (0); /* should never happen */ |
| } |
| return GL_FALSE; |
| } |
| |
| /** \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; |
| GLboolean inDriInfo; |
| GLboolean inSection; |
| GLboolean inDesc; |
| GLboolean inOption; |
| GLboolean 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) { |
| GLuint i; |
| const XML_Char *value = NULL, *text = NULL; |
| driOptionValue v; |
| GLuint 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) { |
| GLuint 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; |
| GLuint opt, i; |
| for (i = 0; attr[i]; i += 2) { |
| GLuint 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 |
| 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: %s.", 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 = GL_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 = GL_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 = GL_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 = GL_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 = GL_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 = GL_FALSE; |
| break; |
| case OI_SECTION: |
| data->inSection = GL_FALSE; |
| break; |
| case OI_DESCRIPTION: |
| data->inDesc = GL_FALSE; |
| break; |
| case OI_OPTION: |
| data->inOption = GL_FALSE; |
| break; |
| case OI_ENUM: |
| data->inEnum = GL_FALSE; |
| break; |
| default: |
| assert (0); /* should have been caught by StartElem */ |
| } |
| } |
| |
| void driParseOptionInfo (driOptionCache *info, |
| const char *configOptions, GLuint nConfigOptions) { |
| XML_Parser p; |
| int status; |
| struct OptInfoData userData; |
| struct OptInfoData *data = &userData; |
| GLuint realNoptions; |
| |
| /* determine hash table size and allocate memory: |
| * 3/2 of the number of options, rounded up, so there remains always |
| * at least one free entry. This is needed for detecting undefined |
| * options in configuration files without getting a hash table overflow. |
| * Round this up to a power of two. */ |
| GLuint minSize = (nConfigOptions*3 + 1) / 2; |
| GLuint size, log2size; |
| for (size = 1, log2size = 0; size < minSize; size <<= 1, ++log2size); |
| info->tableSize = log2size; |
| info->info = CALLOC (size * sizeof (driOptionInfo)); |
| info->values = CALLOC (size * 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 = GL_FALSE; |
| userData.inSection = GL_FALSE; |
| userData.inDesc = GL_FALSE; |
| userData.inOption = GL_FALSE; |
| userData.inEnum = GL_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); |
| |
| /* Check if the actual number of options matches nConfigOptions. |
| * A mismatch is not fatal (a hash table overflow would be) but we |
| * want the driver developer's attention anyway. */ |
| realNoptions = countOptions (info); |
| if (realNoptions != nConfigOptions) { |
| fprintf (stderr, |
| "Error: nConfigOptions (%u) does not match the actual number of options in\n" |
| " __driConfigOptions (%u).\n", |
| nConfigOptions, realNoptions); |
| } |
| } |
| |
| /** \brief Parser context for configuration files. */ |
| struct OptConfData { |
| const char *name; |
| XML_Parser parser; |
| driOptionCache *cache; |
| GLint screenNum; |
| const char *driverName, *execName; |
| GLuint ignoringDevice; |
| GLuint ignoringApp; |
| GLuint inDriConf; |
| GLuint inDevice; |
| GLuint inApp; |
| GLuint 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) { |
| GLuint 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("unkown 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) { |
| GLuint i; |
| const XML_Char *name = NULL, *exec = NULL; |
| for (i = 0; attr[i]; i += 2) { |
| if (!strcmp (attr[i], "name")) name = attr[i+1]; |
| else if (!strcmp (attr[i], "executable")) exec = attr[i+1]; |
| else XML_WARNING("unkown 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) { |
| GLuint 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("unkown 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; |
| GLuint opt = findOption (cache, name); |
| if (cache->info[opt].name == NULL) |
| XML_WARNING ("undefined option: %s.", name); |
| 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) { |
| 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)); |
| } |
| |
| /** \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 |
| } |
| |
| void driParseConfigFiles (driOptionCache *cache, const driOptionCache *info, |
| GLint screenNum, const char *driverName) { |
| char *filenames[2] = {"/etc/drirc", NULL}; |
| char *home; |
| GLuint 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"))) { |
| GLuint 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); |
| } |
| |
| if (filenames[1]) |
| FREE (filenames[1]); |
| } |
| |
| void driDestroyOptionInfo (driOptionCache *info) { |
| driDestroyOptionCache (info); |
| if (info->info) { |
| GLuint i, size = 1 << info->tableSize; |
| for (i = 0; i < size; ++i) { |
| if (info->info[i].name) { |
| FREE (info->info[i].name); |
| if (info->info[i].ranges) |
| FREE (info->info[i].ranges); |
| } |
| } |
| FREE (info->info); |
| } |
| } |
| |
| void driDestroyOptionCache (driOptionCache *cache) { |
| if (cache->values) |
| FREE (cache->values); |
| } |
| |
| GLboolean driCheckOption (const driOptionCache *cache, const char *name, |
| driOptionType type) { |
| GLuint i = findOption (cache, name); |
| return cache->info[i].name != NULL && cache->info[i].type == type; |
| } |
| |
| GLboolean driQueryOptionb (const driOptionCache *cache, const char *name) { |
| GLuint 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; |
| } |
| |
| GLint driQueryOptioni (const driOptionCache *cache, const char *name) { |
| GLuint 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; |
| } |
| |
| GLfloat driQueryOptionf (const driOptionCache *cache, const char *name) { |
| GLuint 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; |
| } |