ini.c

经典LabWindows CVI方面的教材《LabWindows CVI开发入门和进阶》一书第6章中的例题源码

/*--------------------------------------------------------------------------*/
/* Inifile instrument driver example                                        */
/*--------------------------------------------------------------------------*/
#define HELP_MSG \
"This example shows how to use the functions in the Inifile instrument\n\
driver. The Inifile instrument driver contains functions to:\n\
\n\
   - create and dispose an object which can contain an in-memory\n\
     list of tag/value pairs.\n\
   - sort the in-memory list of tag/value pairs\n\
   - read a list of tag/value pairs from a file\n\
   - write the in-memory list of tag/value pairs to a file\n\
\n\
This example opens an existing *.ini file and allows you to display,\n\
add, and remove sections and items from the inifile.\n\
\n\
Note: The Inifile instrument driver treats empty tag items as if they\n\
are not defined.  For example, if the Ini file contains,\n\
    [Ports]\n\
    COM1 = 9600\n\
    COM2 =\n\
the COM2 tag will not be read in."

/*--------------------------------------------------------------------------*/
/* Includes                                                                 */
/*--------------------------------------------------------------------------*/
/* #include <windows.h> For call to SDK function GetSystemDirectory() if used */
#include <utility.h>
#include <userint.h>
#include "inifile.h"

#include "ini.h"

/*--------------------------------------------------------------------------*/
/* Defines                                                                  */
/*--------------------------------------------------------------------------*/
#define MAX_NAME_SIZE 256

/*--------------------------------------------------------------------------*/
/* Variables                                                                */
/*--------------------------------------------------------------------------*/
static int panelHandle   = 0;
static int changesMade   = 0;
static IniText myInifile = 0;
static char fileName[MAX_PATHNAME_LEN];

/*--------------------------------------------------------------------------*/
/* Prototypes                                                               */
/*--------------------------------------------------------------------------*/
int UpdateUIR(void);
    
/*--------------------------------------------------------------------------*/
/* Main                                                                     */
/*--------------------------------------------------------------------------*/
int main (int argc, char *argv[])
{
    int status;

    if (InitCVIRTE (0, argv, 0) == 0)   /* Initialize CVI libraries */
        return -1;  /* out of memory */
        
    if ((panelHandle = LoadPanel (0, "ini.uir", PANEL)) < 0)
        return -1;
        
    DisplayPanel (panelHandle);
    
    /* Use Browse button callback to ask for initial file */
    
    FilenameBrowse (panelHandle, PANEL_FILENAME_BROWSE, EVENT_COMMIT, 0, 0, 0);
    RunUserInterface ();

    /* Write file back out */
    if ((myInifile) && (changesMade))
    {
        if (ConfirmPopup ("Save Changes",
            "Do you want to save changes before opening new file?"))
        {    
            Ini_WriteToFile (myInifile, fileName);
        }    
    }    
    
    /* Destroy Inifile */
    if (myInifile)
    {
        Ini_Dispose (myInifile);
        myInifile = 0;
    }    
    
    changesMade = 0;

Leave:  
    return 0;
}

/*--------------------------------------------------------------------------*/
/* FilenameBrowse                                                           */
/*--------------------------------------------------------------------------*/
int CVICALLBACK FilenameBrowse (int panel, int control, int event,
        void *callbackData, int eventData1, int eventData2)
{
    switch (event)
        {
        case EVENT_COMMIT:
            /* Ask user which Inifile to open */
            fileName[0] = 0;
            
            /* GetSystemDirectory(fileName, MAX_PATHNAME_LEN); */
            
            if (FileSelectPopup (fileName, "*.ini", "*.ini",
                "Specify INI file to open", VAL_LOAD_BUTTON, 0,
                0, 1, 1, fileName)!=VAL_EXISTING_FILE_SELECTED)
                return 0;                               

            /* Write file back out */
            if ((myInifile) && (changesMade))
            {
                if (ConfirmPopup ("Save Changes",
                    "Do you want to save changes before opening new file?"))
                {    
                    Ini_WriteToFile (myInifile, fileName);
                }    
            }    
            
            /* Destroy Inifile */
            if (myInifile)
            {
                Ini_Dispose (myInifile);
                myInifile = 0;
            }    
            
            changesMade = 0;
            
            /* Create Inifile List */
            if (!(myInifile = Ini_New (0)))
            {
                MessagePopup("Inifile","Error allocating memory for Inifile");
                goto Leave;
            }   
            
            /* Open file */
            if (Ini_ReadFromFile (myInifile, fileName))
            {
                MessagePopup("Inifile","Error reading Inifile");
                goto Leave;
            }   
    
            SetCtrlVal(panelHandle, PANEL_FILENAME, fileName);    
            UpdateUIR();

            break;
        }
        
    return 0;
    
Leave:        
    if (myInifile);
        Ini_Dispose (myInifile);
        

    return 0;
}


/*--------------------------------------------------------------------------*/
/* UpdateUIR                                                                */
/*--------------------------------------------------------------------------*/
int UpdateUIR(void)
{
    int sections = 0, items = 0;
    int section = 0, item = 0;
    char *sectionName = NULL;
    char *itemName = NULL;
    
    int booleanValue;
    int integerValue;
    double doubleValue;
    char *stringValue;
    
    if (myInifile) 
    {
    
        /* Set total section information */
        sections = Ini_NumberOfSections (myInifile);
        SetCtrlVal(panelHandle, PANEL_TOTAL_SECTIONS, sections);
        SetCtrlAttribute(panelHandle, PANEL_SECTION, ATTR_MIN_VALUE, (sections>0));
        SetCtrlAttribute(panelHandle, PANEL_SECTION, ATTR_MAX_VALUE, sections);
    
        /* Set sections and item information */
        if (sections) 
        {    
            GetCtrlVal(panelHandle, PANEL_SECTION, &section);
            Ini_NthSectionName (myInifile, section, &sectionName);
            if (sectionName) 
            {        
                SetCtrlVal(panelHandle, PANEL_SECTION_NAME, sectionName);
    
                items  = Ini_NumberOfItems (myInifile, sectionName);
                SetCtrlVal(panelHandle, PANEL_TOTAL_ITEMS, items);
                SetCtrlAttribute(panelHandle, PANEL_ITEM, ATTR_MIN_VALUE, (items>0));
                SetCtrlAttribute(panelHandle, PANEL_ITEM, ATTR_MAX_VALUE, items);
                
                /* Set item information */
                if (items)
                {
                    GetCtrlVal(panelHandle, PANEL_ITEM, &item);
                    Ini_NthItemName (myInifile, sectionName, item, &itemName);
                    if (itemName)
                    {
                        SetCtrlVal(panelHandle, PANEL_ITEM_NAME, itemName);
                    
                        if (Ini_GetBoolean (myInifile, sectionName, itemName, &booleanValue)>0)
                        {
                            SetCtrlVal(panelHandle, PANEL_ITEM_TYPE, 1);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_STRING, ATTR_VISIBLE, 0);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_VISIBLE, 1);
                            SetCtrlAttribute (panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_DATA_TYPE, VAL_INTEGER);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_MIN_VALUE, 0);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_MAX_VALUE, 1);
                            SetCtrlVal(panelHandle, PANEL_ITEM_VALUE_NUMERIC, booleanValue);
                        }    
                        else if (Ini_GetInt (myInifile, sectionName, itemName, &integerValue)>0)
                        {
                            SetCtrlVal(panelHandle, PANEL_ITEM_TYPE, 2);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_STRING, ATTR_VISIBLE, 0);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_VISIBLE, 1);
                            SetCtrlAttribute (panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_DATA_TYPE, VAL_INTEGER);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_MIN_VALUE, -2147483647);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_MAX_VALUE, 2147483647);
                            SetCtrlVal(panelHandle, PANEL_ITEM_VALUE_NUMERIC, integerValue);
                        }    
                        else if (Ini_GetDouble (myInifile, sectionName, itemName, &doubleValue)>0)
                        {
                            SetCtrlVal(panelHandle, PANEL_ITEM_TYPE, 3);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_STRING, ATTR_VISIBLE, 0);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_VISIBLE, 1);
                            SetCtrlAttribute (panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_DATA_TYPE, VAL_DOUBLE);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_MIN_VALUE, -HUGE_VAL);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_MAX_VALUE, HUGE_VAL);
                            SetCtrlVal(panelHandle, PANEL_ITEM_VALUE_NUMERIC, doubleValue);
                        }    
                        else if (Ini_GetPointerToRawString (myInifile, sectionName, itemName, &stringValue)>0)
                        {
                            SetCtrlVal(panelHandle, PANEL_ITEM_TYPE, 4);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_STRING, ATTR_VISIBLE, 1);
                            SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_VISIBLE, 0);
                            SetCtrlVal(panelHandle, PANEL_ITEM_VALUE_STRING, stringValue);
                        }
                        else {
                            MessagePopup("Inifile","Error retrieving value from Inifile for item");
                        }
                    }
                }    
            }        
        }
    }
    
    /* Set Dimming of Controls */
    SetCtrlAttribute(panelHandle, PANEL_NEW_SECTION       , ATTR_DIMMED, (!myInifile));
    SetCtrlAttribute(panelHandle, PANEL_DELETE_SECTION    , ATTR_DIMMED, (!myInifile) || (!sections));
                                                          
    SetCtrlAttribute(panelHandle, PANEL_SECTION           , ATTR_DIMMED, (!myInifile) || (!sections));
    SetCtrlAttribute(panelHandle, PANEL_SECTION_NAME      , ATTR_DIMMED, (!myInifile) || (!sections));
    SetCtrlAttribute(panelHandle, PANEL_TOTAL_ITEMS       , ATTR_DIMMED, (!myInifile) || (!sections));
                                                          
    SetCtrlAttribute(panelHandle, PANEL_NEW_ITEM          , ATTR_DIMMED, (!myInifile) || (!sections));
    SetCtrlAttribute(panelHandle, PANEL_DELETE_ITEM       , ATTR_DIMMED, (!myInifile) || (!sections) || (!items));
                                                          
    SetCtrlAttribute(panelHandle, PANEL_ITEM              , ATTR_DIMMED, (!myInifile) || (!sections) || (!items));
    SetCtrlAttribute(panelHandle, PANEL_ITEM_NAME         , ATTR_DIMMED, (!myInifile) || (!sections) || (!items));
    SetCtrlAttribute(panelHandle, PANEL_ITEM_TYPE         , ATTR_DIMMED, (!myInifile) || (!sections) || (!items));
    SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_STRING , ATTR_DIMMED, (!myInifile) || (!sections) || (!items));
    SetCtrlAttribute(panelHandle, PANEL_ITEM_VALUE_NUMERIC, ATTR_DIMMED, (!myInifile) || (!sections) || (!items));
    
    SetCtrlAttribute(panelHandle, PANEL_TOTAL_SECTIONS    , ATTR_DIMMED, (!myInifile));
    SetCtrlAttribute(panelHandle, PANEL_TEXTMSG_VALUE     , ATTR_DIMMED, (!myInifile) || (!sections) || (!items));


    
/*    
    status = Ini_GetBoolean (myInifile, sectionName, itemName, booleanValue);