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Sweden-Number/dlls/hidclass.sys/descriptor.c

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/*
* HID descriptor parsing
*
* Copyright (C) 2015 Aric Stewart
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include "hid.h"
#include "wine/debug.h"
#include "wine/list.h"
WINE_DEFAULT_DEBUG_CHANNEL(hid);
/* Flags that are defined in the document
"Device Class Definition for Human Interface Devices" */
enum {
INPUT_DATA_CONST = 0x01, /* Data (0) | Constant (1) */
INPUT_ARRAY_VAR = 0x02, /* Array (0) | Variable (1) */
INPUT_ABS_REL = 0x04, /* Absolute (0) | Relative (1) */
INPUT_WRAP = 0x08, /* No Wrap (0) | Wrap (1) */
INPUT_LINEAR = 0x10, /* Linear (0) | Non Linear (1) */
INPUT_PREFSTATE = 0x20, /* Preferred State (0) | No Preferred (1) */
INPUT_NULL = 0x40, /* No Null position (0) | Null state(1) */
INPUT_VOLATILE = 0x80, /* Non Volatile (0) | Volatile (1) */
INPUT_BITFIELD = 0x100 /* Bit Field (0) | Buffered Bytes (1) */
};
enum {
TAG_TYPE_MAIN = 0x0,
TAG_TYPE_GLOBAL,
TAG_TYPE_LOCAL,
TAG_TYPE_RESERVED,
};
enum {
TAG_MAIN_INPUT = 0x08,
TAG_MAIN_OUTPUT = 0x09,
TAG_MAIN_FEATURE = 0x0B,
TAG_MAIN_COLLECTION = 0x0A,
TAG_MAIN_END_COLLECTION = 0x0C
};
enum {
TAG_GLOBAL_USAGE_PAGE = 0x0,
TAG_GLOBAL_LOGICAL_MINIMUM,
TAG_GLOBAL_LOGICAL_MAXIMUM,
TAG_GLOBAL_PHYSICAL_MINIMUM,
TAG_GLOBAL_PHYSICAL_MAXIMUM,
TAG_GLOBAL_UNIT_EXPONENT,
TAG_GLOBAL_UNIT,
TAG_GLOBAL_REPORT_SIZE,
TAG_GLOBAL_REPORT_ID,
TAG_GLOBAL_REPORT_COUNT,
TAG_GLOBAL_PUSH,
TAG_GLOBAL_POP
};
enum {
TAG_LOCAL_USAGE = 0x0,
TAG_LOCAL_USAGE_MINIMUM,
TAG_LOCAL_USAGE_MAXIMUM,
TAG_LOCAL_DESIGNATOR_INDEX,
TAG_LOCAL_DESIGNATOR_MINIMUM,
TAG_LOCAL_DESIGNATOR_MAXIMUM,
TAG_LOCAL_STRING_INDEX,
TAG_LOCAL_STRING_MINIMUM,
TAG_LOCAL_STRING_MAXIMUM,
TAG_LOCAL_DELIMITER
};
static const char* const feature_string[] =
{ "Input", "Output", "Feature" };
struct feature {
struct list entry;
HIDP_VALUE_CAPS caps;
HIDP_REPORT_TYPE type;
BOOLEAN isData;
BOOLEAN isArray;
BOOLEAN IsAbsolute;
BOOLEAN Wrap;
BOOLEAN Linear;
BOOLEAN prefState;
BOOLEAN HasNull;
BOOLEAN Volatile;
BOOLEAN BitField;
unsigned int index;
struct collection *collection;
};
static const char* const collection_string[] = {
"Physical",
"Application",
"Logical",
"Report",
"Named Array",
"Usage Switch",
"Usage Modifier",
};
struct collection {
struct list entry;
HIDP_VALUE_CAPS caps;
unsigned int index;
unsigned int type;
struct collection *parent;
struct list features;
struct list collections;
};
struct caps_stack {
struct list entry;
HIDP_VALUE_CAPS caps;
};
static inline const char *debugstr_hidp_value_caps( HIDP_VALUE_CAPS *caps )
{
if (!caps) return "(null)";
return wine_dbg_sprintf( "RId %d, Usg %02x:%02x-%02x Dat %02x-%02x (%d), Str %d-%d (%d), Des %d-%d (%d), "
"Bits %02x, Als %d, Abs %d, Nul %d, LCol %d LUsg %02x:%02x, BitSz %d, RCnt %d, "
"Unit %x E%+d, Log %+d-%+d, Phy %+d-%+d",
caps->ReportID, caps->UsagePage, caps->Range.UsageMin, caps->Range.UsageMax, caps->Range.DataIndexMin, caps->Range.DataIndexMax, caps->IsRange,
caps->Range.StringMin, caps->Range.StringMax, caps->IsStringRange, caps->Range.DesignatorMin, caps->Range.DesignatorMax, caps->IsDesignatorRange,
caps->BitField, caps->IsAlias, caps->IsAbsolute, caps->HasNull, caps->LinkCollection, caps->LinkUsagePage, caps->LinkUsage, caps->BitSize, caps->ReportCount,
caps->Units, caps->UnitsExp, caps->LogicalMin, caps->LogicalMax, caps->PhysicalMin, caps->PhysicalMax );
}
static void debug_feature(struct feature *feature)
{
if (!feature)
return;
TRACE("[Feature type %s [%i]; %s; %s; %s; %s; %s; %s; %s; %s; %s]\n",
feature_string[feature->type],
feature->index,
(feature->isData)?"Data":"Const",
(feature->isArray)?"Array":"Var",
(feature->IsAbsolute)?"Abs":"Rel",
(feature->Wrap)?"Wrap":"NoWrap",
(feature->Linear)?"Linear":"NonLinear",
(feature->prefState)?"PrefStat":"NoPrefState",
(feature->HasNull)?"HasNull":"NoNull",
(feature->Volatile)?"Volatile":"NonVolatile",
(feature->BitField)?"BitField":"Buffered");
TRACE("Feature %s\n", debugstr_hidp_value_caps(&feature->caps));
}
static void debug_collection(struct collection *collection)
{
struct feature *fentry;
struct collection *centry;
if (TRACE_ON(hid))
{
TRACE("START Collection %i <<< %s, parent: %p, %i features, %i collections\n",
collection->index, collection_string[collection->type], collection->parent,
list_count(&collection->features), list_count(&collection->collections));
TRACE("Collection %s\n", debugstr_hidp_value_caps(&collection->caps));
LIST_FOR_EACH_ENTRY(fentry, &collection->features, struct feature, entry)
debug_feature(fentry);
LIST_FOR_EACH_ENTRY(centry, &collection->collections, struct collection, entry)
debug_collection(centry);
TRACE(">>> END Collection %i\n", collection->index);
}
}
static void debug_print_report(const char* type, WINE_HIDP_PREPARSED_DATA *data,
WINE_HID_REPORT *report)
{
WINE_HID_ELEMENT *elems = HID_ELEMS(data);
unsigned int i;
TRACE("START Report %i <<< %s report : bitSize: %i elementCount: %i\n",
report->reportID,
type,
report->bitSize,
report->elementCount);
for (i = 0; i < report->elementCount; i++)
{
WINE_HID_ELEMENT *elem = elems + report->elementIdx + i;
TRACE("%s: %s, StartBit %d, BitCount %d\n", type, debugstr_hidp_value_caps(&elem->caps), elem->valueStartBit, elem->bitCount);
}
TRACE(">>> END Report %i\n",report->reportID);
}
static void debug_print_preparsed(WINE_HIDP_PREPARSED_DATA *data)
{
unsigned int i, end;
if (TRACE_ON(hid))
{
TRACE("START PREPARSED Data <<< dwSize: %i Usage: %i, UsagePage: %i, "
"InputReportByteLength: %i, tOutputReportByteLength: %i, "
"FeatureReportByteLength: %i, NumberLinkCollectionNodes: %i, "
"NumberInputButtonCaps: %i, NumberInputValueCaps: %i, "
"NumberInputDataIndices: %i, NumberOutputButtonCaps: %i, "
"NumberOutputValueCaps: %i, NumberOutputDataIndices: %i, "
"NumberFeatureButtonCaps: %i, NumberFeatureValueCaps: %i, "
"NumberFeatureDataIndices: %i, reportCount[HidP_Input]: %i, "
"reportCount[HidP_Output]: %i, reportCount[HidP_Feature]: %i, "
"elementOffset: %i\n",
data->dwSize,
data->caps.Usage,
data->caps.UsagePage,
data->caps.InputReportByteLength,
data->caps.OutputReportByteLength,
data->caps.FeatureReportByteLength,
data->caps.NumberLinkCollectionNodes,
data->caps.NumberInputButtonCaps,
data->caps.NumberInputValueCaps,
data->caps.NumberInputDataIndices,
data->caps.NumberOutputButtonCaps,
data->caps.NumberOutputValueCaps,
data->caps.NumberOutputDataIndices,
data->caps.NumberFeatureButtonCaps,
data->caps.NumberFeatureValueCaps,
data->caps.NumberFeatureDataIndices,
data->reportCount[HidP_Input],
data->reportCount[HidP_Output],
data->reportCount[HidP_Feature],
data->elementOffset);
end = data->reportCount[HidP_Input];
for (i = 0; i < end; i++)
{
debug_print_report("INPUT", data, &data->reports[i]);
}
end += data->reportCount[HidP_Output];
for (; i < end; i++)
{
debug_print_report("OUTPUT", data, &data->reports[i]);
}
end += data->reportCount[HidP_Feature];
for (i = 0; i < end; i++)
{
debug_print_report("FEATURE", data, &data->reports[i]);
}
TRACE(">>> END Preparsed Data\n");
}
}
static int getValue(int bsize, int source, BOOL allow_negative)
{
int mask = 0xff;
int negative = 0x80;
int outofrange = 0x100;
int value;
unsigned int i;
if (bsize == 4)
return source;
for (i = 1; i < bsize; i++)
{
mask = (mask<<8) + 0xff;
negative = (negative<<8);
outofrange = (outofrange<<8);
}
value = (source&mask);
if (allow_negative && value&negative)
value = -1 * (outofrange - value);
return value;
}
static void parse_io_feature(unsigned int bSize, int itemVal, int bTag,
unsigned int *feature_index,
struct feature *feature)
{
if (bSize == 0)
{
return;
}
else
{
feature->isData = ((itemVal & INPUT_DATA_CONST) == 0);
feature->isArray = ((itemVal & INPUT_ARRAY_VAR) == 0);
feature->IsAbsolute = ((itemVal & INPUT_ABS_REL) == 0);
feature->Wrap = ((itemVal & INPUT_WRAP) != 0);
feature->Linear = ((itemVal & INPUT_LINEAR) == 0);
feature->prefState = ((itemVal & INPUT_PREFSTATE) == 0);
feature->HasNull = ((itemVal & INPUT_NULL) != 0);
if (bTag != TAG_MAIN_INPUT)
{
feature->Volatile = ((itemVal & INPUT_VOLATILE) != 0);
}
if (bSize > 1)
{
feature->BitField = ((itemVal & INPUT_BITFIELD) == 0);
}
feature->index = *feature_index;
*feature_index = *feature_index + 1;
}
}
static void parse_collection(unsigned int bSize, int itemVal,
struct collection *collection)
{
if (bSize)
{
collection->type = itemVal;
if (itemVal >= 0x07 && itemVal <= 0x7F) {
ERR(" (Reserved 0x%x )\n", itemVal);
}
else if (itemVal >= 0x80 && itemVal <= 0xFF) {
ERR(" (Vendor Defined 0x%x )\n", itemVal);
}
}
}
static void new_caps(HIDP_VALUE_CAPS *caps)
{
caps->IsRange = 0;
caps->IsStringRange = 0;
caps->IsDesignatorRange = 0;
caps->NotRange.Usage = 0;
}
static int parse_descriptor(BYTE *descriptor, unsigned int index, unsigned int length,
unsigned int *feature_index, unsigned int *collection_index,
struct collection *collection, HIDP_VALUE_CAPS *caps,
struct list *stack)
{
int usages_top = 0;
USAGE usages[256];
int i;
for (i = index; i < length;)
{
BYTE b0 = descriptor[i++];
int bSize = b0 & 0x03;
int bType = (b0 >> 2) & 0x03;
int bTag = (b0 >> 4) & 0x0F;
bSize = (bSize == 3) ? 4 : bSize;
if (bType == TAG_TYPE_RESERVED && bTag == 0x0F && bSize == 2 &&
i + 2 < length)
{
/* Long data items: Should be unused */
ERR("Long Data Item, should be unused\n");
return -1;
}
else
{
int bSizeActual = 0;
int itemVal = 0;
unsigned int j;
for (j = 0; j < bSize; j++)
{
if (i + j < length)
{
itemVal += descriptor[i + j] << (8 * j);
bSizeActual++;
}
}
TRACE(" 0x%x[%i], type %i , tag %i, size %i, val %i\n",b0,i-1,bType, bTag, bSize, itemVal );
if (bType == TAG_TYPE_MAIN)
{
struct feature *feature;
switch(bTag)
{
case TAG_MAIN_INPUT:
case TAG_MAIN_OUTPUT:
case TAG_MAIN_FEATURE:
for (j = 0; j < caps->ReportCount; j++)
{
if (!(feature = calloc(1, sizeof(*feature)))) return -1;
list_add_tail(&collection->features, &feature->entry);
if (bTag == TAG_MAIN_INPUT)
feature->type = HidP_Input;
else if (bTag == TAG_MAIN_OUTPUT)
feature->type = HidP_Output;
else
feature->type = HidP_Feature;
parse_io_feature(bSize, itemVal, bTag, feature_index, feature);
if (j < usages_top)
caps->NotRange.Usage = usages[j];
feature->caps = *caps;
feature->caps.ReportCount = 1;
feature->collection = collection;
if (j+1 >= usages_top)
{
feature->caps.ReportCount += caps->ReportCount - (j + 1);
break;
}
}
usages_top = 0;
new_caps(caps);
break;
case TAG_MAIN_COLLECTION:
{
struct collection *subcollection;
if (!(subcollection = calloc(1, sizeof(struct collection)))) return -1;
list_add_tail(&collection->collections, &subcollection->entry);
subcollection->parent = collection;
/* Only set our collection once...
We do not properly handle composite devices yet. */
if (usages_top)
{
caps->NotRange.Usage = usages[usages_top-1];
usages_top = 0;
}
if (*collection_index == 0)
collection->caps = *caps;
subcollection->caps = *caps;
subcollection->index = *collection_index;
*collection_index = *collection_index + 1;
list_init(&subcollection->features);
list_init(&subcollection->collections);
new_caps(caps);
parse_collection(bSize, itemVal, subcollection);
if ((i = parse_descriptor(descriptor, i+1, length, feature_index, collection_index, subcollection, caps, stack)) < 0) return i;
continue;
}
case TAG_MAIN_END_COLLECTION:
return i;
default:
ERR("Unknown (bTag: 0x%x, bType: 0x%x)\n", bTag, bType);
return -1;
}
}
else if (bType == TAG_TYPE_GLOBAL)
{
switch(bTag)
{
case TAG_GLOBAL_USAGE_PAGE:
caps->UsagePage = getValue(bSize, itemVal, FALSE);
break;
case TAG_GLOBAL_LOGICAL_MINIMUM:
caps->LogicalMin = getValue(bSize, itemVal, TRUE);
break;
case TAG_GLOBAL_LOGICAL_MAXIMUM:
caps->LogicalMax = getValue(bSize, itemVal, TRUE);
break;
case TAG_GLOBAL_PHYSICAL_MINIMUM:
caps->PhysicalMin = getValue(bSize, itemVal, TRUE);
break;
case TAG_GLOBAL_PHYSICAL_MAXIMUM:
caps->PhysicalMax = getValue(bSize, itemVal, TRUE);
break;
case TAG_GLOBAL_UNIT_EXPONENT:
caps->UnitsExp = getValue(bSize, itemVal, TRUE);
break;
case TAG_GLOBAL_UNIT:
caps->Units = getValue(bSize, itemVal, TRUE);
break;
case TAG_GLOBAL_REPORT_SIZE:
caps->BitSize = getValue(bSize, itemVal, FALSE);
break;
case TAG_GLOBAL_REPORT_ID:
caps->ReportID = getValue(bSize, itemVal, FALSE);
break;
case TAG_GLOBAL_REPORT_COUNT:
caps->ReportCount = getValue(bSize, itemVal, FALSE);
break;
case TAG_GLOBAL_PUSH:
{
struct caps_stack *saved;
if (!(saved = malloc(sizeof(*saved)))) return -1;
saved->caps = *caps;
TRACE("Push\n");
list_add_tail(stack, &saved->entry);
break;
}
case TAG_GLOBAL_POP:
{
struct list *tail;
struct caps_stack *saved;
TRACE("Pop\n");
tail = list_tail(stack);
if (tail)
{
saved = LIST_ENTRY(tail, struct caps_stack, entry);
*caps = saved->caps;
list_remove(tail);
free(saved);
}
else
{
ERR("Pop but no stack!\n");
return -1;
}
break;
}
default:
ERR("Unknown (bTag: 0x%x, bType: 0x%x)\n", bTag, bType);
return -1;
}
}
else if (bType == TAG_TYPE_LOCAL)
{
switch(bTag)
{
case TAG_LOCAL_USAGE:
if (usages_top == sizeof(usages))
{
ERR("More than 256 individual usages defined\n");
return -1;
}
else
{
usages[usages_top++] = getValue(bSize, itemVal, FALSE);
caps->IsRange = FALSE;
}
break;
case TAG_LOCAL_USAGE_MINIMUM:
caps->Range.UsageMin = getValue(bSize, itemVal, FALSE);
caps->IsRange = TRUE;
break;
case TAG_LOCAL_USAGE_MAXIMUM:
caps->Range.UsageMax = getValue(bSize, itemVal, FALSE);
caps->IsRange = TRUE;
break;
case TAG_LOCAL_DESIGNATOR_INDEX:
caps->NotRange.DesignatorIndex = getValue(bSize, itemVal, FALSE);
caps->IsDesignatorRange = FALSE;
break;
case TAG_LOCAL_DESIGNATOR_MINIMUM:
caps->Range.DesignatorMin = getValue(bSize, itemVal, FALSE);
caps->IsDesignatorRange = TRUE;
break;
case TAG_LOCAL_DESIGNATOR_MAXIMUM:
caps->Range.DesignatorMax = getValue(bSize, itemVal, FALSE);
caps->IsDesignatorRange = TRUE;
break;
case TAG_LOCAL_STRING_INDEX:
caps->NotRange.StringIndex = getValue(bSize, itemVal, FALSE);
caps->IsStringRange = FALSE;
break;
case TAG_LOCAL_STRING_MINIMUM:
caps->Range.StringMin = getValue(bSize, itemVal, FALSE);
caps->IsStringRange = TRUE;
break;
case TAG_LOCAL_STRING_MAXIMUM:
caps->Range.StringMax = getValue(bSize, itemVal, FALSE);
caps->IsStringRange = TRUE;
break;
case TAG_LOCAL_DELIMITER:
FIXME("delimiter %d not implemented!\n", itemVal);
return -1;
default:
ERR("Unknown (bTag: 0x%x, bType: 0x%x)\n", bTag, bType);
return -1;
}
}
else
{
ERR("Unknown (bTag: 0x%x, bType: 0x%x)\n", bTag, bType);
return -1;
}
i += bSize;
}
}
return i;
}
static void build_elements(WINE_HID_REPORT *wine_report, WINE_HID_ELEMENT *elems,
struct feature* feature, USHORT *data_index)
{
WINE_HID_ELEMENT *wine_element = elems + wine_report->elementIdx + wine_report->elementCount;
ULONG index_count;
if (!feature->isData)
{
wine_report->bitSize += feature->caps.BitSize * feature->caps.ReportCount;
return;
}
wine_element->valueStartBit = wine_report->bitSize;
wine_element->bitCount = (feature->caps.BitSize * feature->caps.ReportCount);
wine_report->bitSize += wine_element->bitCount;
wine_element->caps = feature->caps;
wine_element->caps.BitField = feature->BitField;
wine_element->caps.LinkCollection = feature->collection->index;
wine_element->caps.LinkUsage = feature->collection->caps.NotRange.Usage;
wine_element->caps.LinkUsagePage = feature->collection->caps.UsagePage;
wine_element->caps.IsAbsolute = feature->IsAbsolute;
wine_element->caps.HasNull = feature->HasNull;
if (wine_element->caps.IsRange)
{
if (wine_element->caps.BitSize == 1) index_count = wine_element->bitCount - 1;
else index_count = wine_element->caps.Range.UsageMax - wine_element->caps.Range.UsageMin;
wine_element->caps.Range.DataIndexMin = *data_index;
wine_element->caps.Range.DataIndexMax = *data_index + index_count;
*data_index = *data_index + index_count + 1;
}
else
{
wine_element->caps.NotRange.DataIndex = *data_index;
wine_element->caps.NotRange.Reserved4 = *data_index;
*data_index = *data_index + 1;
}
wine_report->elementCount++;
}
static void count_elements(struct feature* feature, USHORT *buttons, USHORT *values)
{
if (!feature->isData)
return;
if (feature->caps.BitSize == 1)
(*buttons)++;
else
(*values)++;
}
struct preparse_ctx
{
int report_count[3];
int elem_count;
int report_elem_count[3][256];
int elem_alloc;
BOOL report_created[3][256];
};
static void create_preparse_ctx(const struct collection *base, struct preparse_ctx *ctx)
{
struct feature *f;
struct collection *c;
LIST_FOR_EACH_ENTRY(f, &base->features, struct feature, entry)
{
ctx->elem_count++;
ctx->report_elem_count[f->type][f->caps.ReportID]++;
if (ctx->report_elem_count[f->type][f->caps.ReportID] != 1)
continue;
ctx->report_count[f->type]++;
}
LIST_FOR_EACH_ENTRY(c, &base->collections, struct collection, entry)
create_preparse_ctx(c, ctx);
}
static void preparse_collection(const struct collection *root, const struct collection *base,
WINE_HIDP_PREPARSED_DATA *data, struct preparse_ctx *ctx)
{
WINE_HID_ELEMENT *elem = HID_ELEMS(data);
WINE_HID_LINK_COLLECTION_NODE *nodes = HID_NODES(data);
struct feature *f;
struct collection *c;
struct list *entry;
LIST_FOR_EACH_ENTRY(f, &base->features, struct feature, entry)
{
WINE_HID_REPORT *report;
if (!ctx->report_created[f->type][f->caps.ReportID])
{
ctx->report_created[f->type][f->caps.ReportID] = TRUE;
data->reportIdx[f->type][f->caps.ReportID] = data->reportCount[f->type]++;
if (f->type > 0) data->reportIdx[f->type][f->caps.ReportID] += ctx->report_count[0];
if (f->type > 1) data->reportIdx[f->type][f->caps.ReportID] += ctx->report_count[1];
report = &data->reports[data->reportIdx[f->type][f->caps.ReportID]];
report->reportID = f->caps.ReportID;
/* Room for the reportID */
report->bitSize = 8;
report->elementIdx = ctx->elem_alloc;
ctx->elem_alloc += ctx->report_elem_count[f->type][f->caps.ReportID];
}
report = &data->reports[data->reportIdx[f->type][f->caps.ReportID]];
switch (f->type)
{
case HidP_Input:
build_elements(report, elem, f, &data->caps.NumberInputDataIndices);
count_elements(f, &data->caps.NumberInputButtonCaps, &data->caps.NumberInputValueCaps);
data->caps.InputReportByteLength =
max(data->caps.InputReportByteLength, (report->bitSize + 7) / 8);
break;
case HidP_Output:
build_elements(report, elem, f, &data->caps.NumberOutputDataIndices);
count_elements(f, &data->caps.NumberOutputButtonCaps, &data->caps.NumberOutputValueCaps);
data->caps.OutputReportByteLength =
max(data->caps.OutputReportByteLength, (report->bitSize + 7) / 8);
break;
case HidP_Feature:
build_elements(report, elem, f, &data->caps.NumberFeatureDataIndices);
count_elements(f, &data->caps.NumberFeatureButtonCaps, &data->caps.NumberFeatureValueCaps);
data->caps.FeatureReportByteLength =
max(data->caps.FeatureReportByteLength, (report->bitSize + 7) / 8);
break;
}
}
if (root != base)
{
nodes[base->index].LinkUsagePage = base->caps.UsagePage;
nodes[base->index].LinkUsage = base->caps.NotRange.Usage;
nodes[base->index].Parent = base->parent == root ? 0 : base->parent->index;
nodes[base->index].CollectionType = base->type;
nodes[base->index].IsAlias = 0;
if ((entry = list_head(&base->collections)))
nodes[base->index].FirstChild = LIST_ENTRY(entry, struct collection, entry)->index;
}
LIST_FOR_EACH_ENTRY(c, &base->collections, struct collection, entry)
{
preparse_collection(root, c, data, ctx);
if ((entry = list_next(&base->collections, &c->entry)))
nodes[c->index].NextSibling = LIST_ENTRY(entry, struct collection, entry)->index;
if (root != base) nodes[base->index].NumberOfChildren++;
}
}
static WINE_HIDP_PREPARSED_DATA* build_PreparseData(struct collection *base_collection, unsigned int node_count)
{
WINE_HIDP_PREPARSED_DATA *data;
unsigned int report_count;
unsigned int size;
struct preparse_ctx ctx;
unsigned int element_off;
unsigned int nodes_offset;
memset(&ctx, 0, sizeof(ctx));
create_preparse_ctx(base_collection, &ctx);
report_count = ctx.report_count[HidP_Input] + ctx.report_count[HidP_Output]
+ ctx.report_count[HidP_Feature];
element_off = FIELD_OFFSET(WINE_HIDP_PREPARSED_DATA, reports[report_count]);
size = element_off + (ctx.elem_count * sizeof(WINE_HID_ELEMENT));
nodes_offset = size;
size += node_count * sizeof(WINE_HID_LINK_COLLECTION_NODE);
if (!(data = calloc(1, size))) return NULL;
data->magic = HID_MAGIC;
data->dwSize = size;
data->caps.Usage = base_collection->caps.NotRange.Usage;
data->caps.UsagePage = base_collection->caps.UsagePage;
data->caps.NumberLinkCollectionNodes = node_count;
data->elementOffset = element_off;
data->nodesOffset = nodes_offset;
preparse_collection(base_collection, base_collection, data, &ctx);
return data;
}
static void free_collection(struct collection *collection)
{
struct feature *fentry, *fnext;
struct collection *centry, *cnext;
LIST_FOR_EACH_ENTRY_SAFE(centry, cnext, &collection->collections, struct collection, entry)
{
list_remove(&centry->entry);
free_collection(centry);
}
LIST_FOR_EACH_ENTRY_SAFE(fentry, fnext, &collection->features, struct feature, entry)
{
list_remove(&fentry->entry);
free(fentry);
}
free(collection);
}
WINE_HIDP_PREPARSED_DATA* ParseDescriptor(BYTE *descriptor, unsigned int length)
{
WINE_HIDP_PREPARSED_DATA *data = NULL;
struct collection *base;
HIDP_VALUE_CAPS caps;
struct list caps_stack;
unsigned int feature_count = 0;
unsigned int cidx;
if (TRACE_ON(hid))
{
TRACE("Descriptor[%i]: ", length);
for (cidx = 0; cidx < length; cidx++)
{
TRACE("%x ",descriptor[cidx]);
if ((cidx+1) % 80 == 0)
TRACE("\n");
}
TRACE("\n");
}
list_init(&caps_stack);
if (!(base = calloc(1, sizeof(*base)))) return NULL;
base->index = 1;
list_init(&base->features);
list_init(&base->collections);
memset(&caps, 0, sizeof(caps));
cidx = 0;
if (parse_descriptor(descriptor, 0, length, &feature_count, &cidx, base, &caps, &caps_stack) < 0)
{
free_collection(base);
return NULL;
}
debug_collection(base);
if (!list_empty(&caps_stack))
{
struct caps_stack *entry, *cursor;
ERR("%i unpopped device caps on the stack\n", list_count(&caps_stack));
LIST_FOR_EACH_ENTRY_SAFE(entry, cursor, &caps_stack, struct caps_stack, entry)
{
list_remove(&entry->entry);
free(entry);
}
}
if ((data = build_PreparseData(base, cidx)))
debug_print_preparsed(data);
free_collection(base);
return data;
}
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