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Purpose |
Obtains the status of the open device | |
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Old name |
#define dvc_status dvc_get_status | |
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Syntax |
int dvc_get_status(status) | |
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Parameters |
char* status |
Pointer to an allocated area where the status can be placed |
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Description |
The dvc_get_status() function is used in conjunction with device drivers. It describes the state of the currently open device, as determined by the last call to the function dvc_set_subdevice(). This function places a null-terminated string in the space pointed to by the status parameter. The meaning of this string is determined by the device driver protocol. For example, a device driver may return an ASCII 0 if the current device is the cash drawer and it is closed and an ASCII 1 if it is open. See the DP4 Device Integration Developers Manual for more information on this function. | |
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Return values |
Returns the length of the string inserted in the status area | |
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See also |
dvc_set_inp_mask(), dvc_get_inp_source(), dvc_set_subdevice() | |