/*
* 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 "main/imports.h"
#include "utils.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 GL_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) {
GLuint 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) {
GLuint 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) {
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_STRING);
return cache->values[i]._string;
}