Add support for optional command header part

Jan Breuer

2013-06-24 4925f462dc0eeb608d7adba379dd04771f92eb51

 libscpi/inc/scpi/types.h

@@ -101,13 +101,7 @@

    typedef struct _scpi_command_t scpi_command_t;

    struct _scpi_param_list_t {
        const scpi_command_t * cmd;
        const char * parameters;
        size_t length;
    };
#define SCPI_CMD_LIST_END       {NULL, NULL, }
    typedef struct _scpi_param_list_t scpi_param_list_t;

    /* scpi interface */
    typedef struct _scpi_t scpi_t;
@@ -142,11 +136,14 @@
        TokDoubleQuoteProgramData,
        TokProgramExpression,
        TokCompoundProgramHeader,
        TokIncompleteCompoundProgramHeader,
        TokCommonProgramHeader,
        TokIncompleteCommonProgramHeader,
        TokCompoundQueryProgramHeader,
        TokCommonQueryProgramHeader,
        TokWhiteSpace,
        TokAllProgramData,
        TokInvalid,
        TokUnknown,
    };
    typedef enum _token_type_t token_type_t;
@@ -227,13 +224,33 @@
#define SCPI_SPECIAL_NUMBERS_LIST_END   {NULL, SCPI_NUM_NUMBER}    
    typedef struct _scpi_special_number_def_t scpi_special_number_def_t;

    struct _scpi_number_t {
    struct _scpi_param_list_t {
        const scpi_command_t * cmd;
        lex_state_t lex_state;
    };
    typedef struct _scpi_param_list_t scpi_param_list_t;  
    
    struct _scpi_number_parameter_t {
        double value;
        scpi_unit_t unit;
        int8_t base;
        scpi_special_number_t type;
    };
    typedef struct _scpi_number_t scpi_number_t;
    typedef struct _scpi_number_parameter_t scpi_number_parameter_t;

    struct _scpi_data_parameter_t {
        const char * ptr;
        int32_t len;        
    };
    typedef struct _scpi_data_parameter_t scpi_data_parameter_t;
    
    struct _scpi_parameter_t {
        token_type_t type;
        scpi_data_parameter_t data;
        scpi_number_parameter_t number;
    };
    typedef struct _scpi_parameter_t scpi_parameter_t;
    
    struct _scpi_command_t {
        const char * pattern;
        scpi_command_callback_t callback;
@@ -251,7 +268,7 @@
    struct _scpi_t {
        const scpi_command_t * cmdlist;
        scpi_buffer_t buffer;
        scpi_param_list_t paramlist;
        scpi_param_list_t param_list;
        scpi_interface_t * interface;
        int_fast16_t output_count;
        int_fast16_t input_count;