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windows-nt/Source/XPSP1/NT/printscan/fax/config/dll/tapiutil.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1996 Microsoft Corporation
Module Name:
tapiutil.c
Abstract:
Functions for working with TAPI
Environment:
Fax configuration applet
Revision History:
03/16/96 -davidx-
Created it.
mm/dd/yy -author-
description
NOTE:
We are calling W-version of TAPI APIs explicitly here because
tapi.h doesn't properly expand them to A- or W-version.
--*/
#include "faxcpl.h"
#include <tapi.h>
//
// Global variables used for accessing TAPI services
//
static HLINEAPP tapiLineApp = NULL;
static DWORD tapiVersion = TAPI_CURRENT_VERSION;
static LPLINECOUNTRYLIST pLineCountryList = NULL;
BOOL
GetCountries(
VOID
)
/*++
Routine Description:
Return a list of countries from TAPI
Arguments:
NONE
Return Value:
TRUE if successful, FALSE if there is an error
NOTE:
We cache the result of lineGetCountry here since it's incredibly slow.
This function must be invoked inside a critical section since it updates
globally shared information.
--*/
#define INITIAL_SIZE_ALL_COUNTRY 22000 // Initial buffer size
{
DWORD cbNeeded = INITIAL_SIZE_ALL_COUNTRY;
INT repeatCnt = 0;
LONG status;
if (pLineCountryList == NULL) {
while (TRUE) {
//
// Free existing buffer and allocate a new buffer of required size
//
MemFree(pLineCountryList);
if (! (pLineCountryList = MemAlloc(cbNeeded))) {
Error(("Memory allocation failed\n"));
break;
}
//
// Call TAPI to get the list of countries
//
pLineCountryList->dwTotalSize = cbNeeded;
status = lineGetCountry(0, tapiVersion, pLineCountryList);
//
// Retries with a larger buffer size if our initial estimate was too small
//
if ((pLineCountryList->dwNeededSize > pLineCountryList->dwTotalSize) &&
(status == NO_ERROR ||
status == LINEERR_STRUCTURETOOSMALL ||
status == LINEERR_NOMEM) &&
(repeatCnt++ == 0))
{
cbNeeded = pLineCountryList->dwNeededSize + 1;
Warning(("LINECOUNTRYLIST size: %d\n", cbNeeded));
continue;
}
if (status != NO_ERROR) {
Error(("lineGetCountry failed: %x\n", status));
MemFree(pLineCountryList);
pLineCountryList = NULL;
} else
Verbose(("Number of countries: %d\n", pLineCountryList->dwNumCountries));
break;
}
}
return pLineCountryList != NULL;
}
VOID CALLBACK
TapiLineCallback(
DWORD hDevice,
DWORD dwMessage,
DWORD dwInstance,
DWORD dwParam1,
DWORD dwParam2,
DWORD dwParam3
)
/*++
Routine Description:
TAPI line callback function: Even though we don't actually have anything
to do here, we must provide a callback function to keep TAPI happy.
Arguments:
hDevice - Line or call handle
dwMessage - Reason for the callback
dwInstance - LINE_INFO index
dwParam1 - Callback parameter #1
dwParam2 - Callback parameter #2
dwParam3 - Callback parameter #3
Return Value:
NONE
--*/
{
}
BOOL
InitTapiService(
VOID
)
/*++
Routine Description:
Perform TAPI initialization if necessary
Arguments:
NONE
Return Value:
TRUE if successful, FALSE if there is an error
--*/
{
DWORD nLineDevs;
LONG status;
if (tapiLineApp == NULL) {
status = lineInitialize(&tapiLineApp,
ghInstance,
TapiLineCallback,
"Fax Configuration",
&nLineDevs);
if (status != NO_ERROR) {
Error(("lineInitialize failed: %x\n", status));
tapiLineApp = NULL;
} else {
//
// Don't call lineNegotiateAPIVersion if nLineDevs is 0.
//
Verbose(("Number of lines: %d\n", nLineDevs));
if (nLineDevs > 0) {
LINEEXTENSIONID lineExtensionID;
status = lineNegotiateAPIVersion(tapiLineApp,
0,
TAPI_CURRENT_VERSION,
TAPI_CURRENT_VERSION,
&tapiVersion,
&lineExtensionID);
if (status != NO_ERROR) {
Error(("lineNegotiateAPIVersion failed: %x\n", status));
tapiVersion = TAPI_CURRENT_VERSION;
}
}
//
// Get a list of countries from TAPI
//
GetCountries();
}
}
return tapiLineApp != NULL;
}
VOID
DeinitTapiService(
VOID
)
/*++
Routine Description:
Perform TAPI deinitialization if necessary
Arguments:
NONE
Return Value:
NONE
--*/
{
MemFree(pLineCountryList);
pLineCountryList = NULL;
if (tapiLineApp) {
lineShutdown(tapiLineApp);
tapiLineApp = NULL;
}
}
LPLINECOUNTRYENTRY
FindCountry(
DWORD countryId
)
/*++
Routine Description:
Find the specified country from a list of all countries and
return a pointer to the corresponding LINECOUNTRYENTRY structure
Arguments:
countryId - Specifies the country ID we're interested in
Return Value:
Pointer to a LINECOUNTRYENTRY structure corresponding to the specified country ID
NULL if there is an error
--*/
{
LPLINECOUNTRYENTRY pEntry;
DWORD index;
if (pLineCountryList == NULL || countryId == 0)
return NULL;
//
// Look at each LINECOUNTRYENTRY structure and compare its country ID with
// the specified country ID
//
pEntry = (LPLINECOUNTRYENTRY)
((PBYTE) pLineCountryList + pLineCountryList->dwCountryListOffset);
for (index=0; index < pLineCountryList->dwNumCountries; index++, pEntry++) {
if (pEntry->dwCountryID == countryId)
return pEntry;
}
return NULL;
}
INT
AreaCodeRules(
LPLINECOUNTRYENTRY pEntry
)
/*++
Routine Description:
Given a LINECOUNTRYENTRY structure, determine if area code is needed in that country
Arguments:
pEntry - Points to a LINECOUNTRYENTRY structure
Return Value:
AREACODE_DONTNEED - Area code is not used in the specified country
AREACODE_OPTIONAL - Area code is optional in the specified country
AREACODE_REQUIRED - Area code is required in the specified country
--*/
#define AREACODE_DONTNEED 0
#define AREACODE_REQUIRED 1
#define AREACODE_OPTIONAL 2
{
if ((pEntry != NULL) &&
(pEntry->dwLongDistanceRuleSize != 0) &&
(pEntry->dwLongDistanceRuleOffset != 0))
{
LPTSTR pLongDistanceRule;
//
// Get the long distance rules for the specified country
//
Assert(pLineCountryList != NULL);
pLongDistanceRule = (LPTSTR)
((PBYTE) pLineCountryList + pEntry->dwLongDistanceRuleOffset);
//
// Area code is required in this country
//
if (_tcschr(pLongDistanceRule, TEXT('F')) != NULL)
return AREACODE_REQUIRED;
//
// Area code is not needed in this country
//
if (_tcschr(pLongDistanceRule, TEXT('I')) == NULL)
return AREACODE_DONTNEED;
}
//
// Default case: area code is optional in this country
//
return AREACODE_OPTIONAL;
}
VOID
UpdateAreaCodeField(
HWND hwndAreaCode,
DWORD countryId
)
/*++
Routine Description:
Update any area code text field associated with a country list box
Arguments:
hwndAreaCode - Specifies the text field associated with the country list box
countryId - Currently selected country ID
Return Value:
NONE
--*/
{
if (hwndAreaCode != NULL) {
if (AreaCodeRules(FindCountry(countryId)) == AREACODE_DONTNEED) {
SendMessage(hwndAreaCode, WM_SETTEXT, 0, (LPARAM) TEXT(""));
EnableWindow(hwndAreaCode, FALSE);
} else
EnableWindow(hwndAreaCode, TRUE);
}
}
VOID
InitCountryListBox(
HWND hwndList,
HWND hwndAreaCode,
DWORD countryId
)
/*++
Routine Description:
Initialize the country list box
Arguments:
hwndList - Handle to the country list box window
hwndAreaCode - Handle to an associated area code text field
countryId - Initially selected country ID
Return Value:
NONE
--*/
#define MAX_COUNTRY_NAME 256
{
DWORD index;
TCHAR buffer[MAX_COUNTRY_NAME];
LPLINECOUNTRYENTRY pEntry;
//
// Disable redraw on the list box and reset its content
//
SendMessage(hwndList, WM_SETREDRAW, FALSE, 0);
SendMessage(hwndList, CB_RESETCONTENT, FALSE, 0);
//
// Loop through LINECOUNTRYENTRY structures and
// add the available selections to the country list box.
//
if (pLineCountryList != NULL) {
pEntry = (LPLINECOUNTRYENTRY)
((PBYTE) pLineCountryList + pLineCountryList->dwCountryListOffset);
for (index=0; index < pLineCountryList->dwNumCountries; index++, pEntry++) {
if (pEntry->dwCountryNameSize && pEntry->dwCountryNameOffset) {
wsprintf(buffer, TEXT("%s (%d)"),
(PBYTE) pLineCountryList + pEntry->dwCountryNameOffset,
pEntry->dwCountryCode);
SendMessage(hwndList,
CB_SETITEMDATA,
SendMessage(hwndList, CB_ADDSTRING, 0, (LPARAM) buffer),
pEntry->dwCountryID);
}
}
}
//
// Insert None as the very first selection
//
LoadString(ghInstance, IDS_NO_COUNTRY, buffer, MAX_COUNTRY_NAME);
SendMessage(hwndList, CB_INSERTSTRING, 0, (LPARAM) buffer);
SendMessage(hwndList, CB_SETITEMDATA, 0, 0);
//
// Figure out which item in the list should be selected
//
if (pLineCountryList != NULL) {
for (index=0; index <= pLineCountryList->dwNumCountries; index++) {
if ((DWORD) SendMessage(hwndList, CB_GETITEMDATA, index, 0) == countryId)
break;
}
if (index > pLineCountryList->dwNumCountries)
index = countryId = 0;
} else
index = countryId = 0;
SendMessage(hwndList, CB_SETCURSEL, index, 0);
SendMessage(hwndList, WM_SETREDRAW, TRUE, 0);
//
// Update the associated area code text field
//
UpdateAreaCodeField(hwndAreaCode, countryId);
}
VOID
SelChangeCountryListBox(
HWND hwndList,
HWND hwndAreaCode
)
/*++
Routine Description:
Handle dialog selection changes in the country list box
Arguments:
hwndList - Handle to the country list box window
hwndAreaCode - Handle to an associated area code text field
Return Value:
NONE
--*/
{
UpdateAreaCodeField(hwndAreaCode, GetCountryListBoxSel(hwndList));
}
DWORD
GetCountryListBoxSel(
HWND hwndList
)
/*++
Routine Description:
Return the country ID of the currently selected country in the list box
Arguments:
hwndList - Handle to the country list box window
Return Value:
Currently selected country ID
--*/
{
LONG msgResult;
if ((msgResult = SendMessage(hwndList, CB_GETCURSEL, 0, 0)) == CB_ERR ||
(msgResult = SendMessage(hwndList, CB_GETITEMDATA, msgResult, 0)) == CB_ERR)
{
return 0;
}
return msgResult;
}
DWORD
GetCountryCodeFromCountryID(
DWORD countryId
)
/*++
Routine Description:
Return a country code corresponding to the specified country ID
Arguments:
countryId - Specified the interested country ID
Return Value:
Country code corresponding to the specified country ID
--*/
{
LPLINECOUNTRYENTRY pLineCountryEntry;
pLineCountryEntry = FindCountry(countryId);
return pLineCountryEntry ? pLineCountryEntry->dwCountryCode : 0;
}
DWORD
GetDefaultCountryID(
VOID
)
/*++
Routine Description:
Return the default country ID for the current location
Arguments:
NONE
Return Value:
Default country ID
--*/
#define INITIAL_LINETRANSLATECAPS_SIZE 5000 // Initial buffer size
{
DWORD cbNeeded = INITIAL_LINETRANSLATECAPS_SIZE;
DWORD countryId = 0;
LONG status;
INT repeatCnt = 0;
LPLINETRANSLATECAPS pTranslateCaps = NULL;
if (tapiLineApp == NULL)
return 0;
while (TRUE) {
//
// Free any existing buffer and allocate a new one with larger size
//
MemFree(pTranslateCaps);
if (! (pTranslateCaps = MemAlloc(cbNeeded))) {
Error(("Memory allocation failed\n"));
return 0;
}
//
// Get the LINETRANSLATECAPS structure from TAPI
//
pTranslateCaps->dwTotalSize = cbNeeded;
status = lineGetTranslateCaps(tapiLineApp, tapiVersion, pTranslateCaps);
//
// Retry if our initial estimated buffer size was too small
//
if ((pTranslateCaps->dwNeededSize > pTranslateCaps->dwTotalSize) &&
(status == NO_ERROR ||
status == LINEERR_STRUCTURETOOSMALL ||
status == LINEERR_NOMEM) &&
(repeatCnt++ == 0))
{
cbNeeded = pTranslateCaps->dwNeededSize;
Warning(("LINETRANSLATECAPS size: %d\n", cbNeeded));
continue;
}
break;
}
//
// Find the current location entry
//
if (status != NO_ERROR) {
Error(("lineGetTranslateCaps failed: %x\n", status));
} else if (pTranslateCaps->dwLocationListSize && pTranslateCaps->dwLocationListOffset) {
LPLINELOCATIONENTRY pLineLocationEntry;
DWORD index;
pLineLocationEntry = (LPLINELOCATIONENTRY)
((PBYTE) pTranslateCaps + pTranslateCaps->dwLocationListOffset);
for (index=0; index < pTranslateCaps->dwNumLocations; index++, pLineLocationEntry++) {
if (pLineLocationEntry->dwPermanentLocationID == pTranslateCaps->dwCurrentLocationID) {
countryId = pLineLocationEntry->dwCountryID;
break;
}
}
}
MemFree(pTranslateCaps);
return countryId;
}
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