weslondon
asked on
Borland C++ .... SetupGetStringField (returning a value from a INF File)
Hello,
I've used an INF file on our current application to store some parameters.
However, we appear to be experiencing problems with the SetupGetStringField function.
i.e. it doesn't appear to be returning anything.
I've used SetupOpenInfFile to open the INF file and SetupFindFirstLine to find the first line which contains the relevant section and key.
However SetupGetStringField doesn't appear to be working.
Can you have a look at the code to see what the problem is and/or suggest a different approach which be easier?
hope you can help.
Cheers, weslondon
~~~~~~~~~~~~~
DWORD dwResult;
HINF hInf; //variable to hold the INF handle
UINT ErrorLine; //variable to hold errors returned
INFCONTEXT aContext = {0};
char * aReturnBuffer;
DWORD aReturnBufferSize;
PDWORD aRequiredSize;
BOOL aLineFound = 0;
BOOL aStrEntryFound = 0;
strcpy (aInfName, "C:/Inf.inf");
hInf = SetupOpenInfFile (
aInfName,
NULL,
INF_STYLE_WIN4,
&ErrorLine); //line number of the syntax error
if (hInf == INVALID_HANDLE_VALUE)
{
return NULL;
}
else
{
// Find correct line - using aSection and aKey
aLineFound = SetupFindFirstLine(
hInf, // handle to an INF file
aSection, // section in which to find a line
aKey, // optional, key to search for
&aContext // context of the found line
);
if (aLineFound)
{
// Extract value using &aContext
aStrEntryFound = SetupGetStringField(
&aContext, // context of the INF file
1, // index of the field to get
aReturnBuffer, // optional, receives the field
aReturnBufferSize, // size of the provided buffer
NULL // optional, buffer size needed
);
}
if (aStrEntryFound)
{
SetupCloseInfFile(hInf);
return aReturnBuffer;
}
~~~~~~~~~~~
N.B aStrEntryFound is false
(i.e. nothing returned in aReturnBuffer)
I've used an INF file on our current application to store some parameters.
However, we appear to be experiencing problems with the SetupGetStringField function.
i.e. it doesn't appear to be returning anything.
I've used SetupOpenInfFile to open the INF file and SetupFindFirstLine to find the first line which contains the relevant section and key.
However SetupGetStringField doesn't appear to be working.
Can you have a look at the code to see what the problem is and/or suggest a different approach which be easier?
hope you can help.
Cheers, weslondon
~~~~~~~~~~~~~
DWORD dwResult;
HINF hInf; //variable to hold the INF handle
UINT ErrorLine; //variable to hold errors returned
INFCONTEXT aContext = {0};
char * aReturnBuffer;
DWORD aReturnBufferSize;
PDWORD aRequiredSize;
BOOL aLineFound = 0;
BOOL aStrEntryFound = 0;
strcpy (aInfName, "C:/Inf.inf");
hInf = SetupOpenInfFile (
aInfName,
NULL,
INF_STYLE_WIN4,
&ErrorLine); //line number of the syntax error
if (hInf == INVALID_HANDLE_VALUE)
{
return NULL;
}
else
{
// Find correct line - using aSection and aKey
aLineFound = SetupFindFirstLine(
hInf, // handle to an INF file
aSection, // section in which to find a line
aKey, // optional, key to search for
&aContext // context of the found line
);
if (aLineFound)
{
// Extract value using &aContext
aStrEntryFound = SetupGetStringField(
&aContext, // context of the INF file
1, // index of the field to get
aReturnBuffer, // optional, receives the field
aReturnBufferSize, // size of the provided buffer
NULL // optional, buffer size needed
);
}
if (aStrEntryFound)
{
SetupCloseInfFile(hInf);
return aReturnBuffer;
}
~~~~~~~~~~~
N.B aStrEntryFound is false
(i.e. nothing returned in aReturnBuffer)
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char * aReturnBuffer [ 1024]; // or whatever size is appropriate
DWORD aReturnBufferSize = sizeof ( aReturnBuffer);
The docs state: "ReturnBuffer
This optional parameter points to a caller-supplied buffer "