C / C++ / MFC

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

CString str("127.0.0.1");
struct in_addr ia;
ia.S_addr = inet_addr(str);
// now look at the four members of ia.S_un_b 

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

TOXCCT >>> GEII power

<font style="color:blue;">#include</font> <stdlib.h>    <font style="color:green;">// atoi()</font>
<font style="color:blue;">#include</font> <ctype.h>     <font style="color:green;">// isdigit()</font>
<font style="color:blue;">#include</font> <string.h>    <font style="color:green;">// strlen()</font>
 
<font style="color:blue;">enum </font>IPValidate {
    IP_ERR = 0,
    IP_OK  = 1
};

 
<font style="color:blue;">int</font> str2bytesIPAddr (<font style="color:blue;">char </font>pcDestTab[], <font style="color:blue;">const char</font>* pcIPAddr) {
    <font style="color:green;">// An IP address is between 0.0.0.0 and 255.255.255.255
</font>
    <font style="color:blue;">int </font>iCptCharIntoIPAddr = 0;
    <font style="color:blue;">int </font>iCptCharIntoByte = 0;
    <font style="color:blue;">int </font>iResult = IP_OK;
    <font style="color:blue;">short </font>sNbBytes = 0;
    <font style="color:blue;">char </font>pstrByte[16];<font style="color:green;">	// To prevent argument size error
</font> 
    <font style="color:blue;">if </font>(strlen(pcIPAddr) > 15) {<font style="color:green;">// the max length of an IP address can't exceed 15 caracters
</font>         iResult = IP_ERR;
    }
    <font style="color:blue;">else </font>{
        <font style="color:blue;">do </font>{
            <font style="color:blue;">if </font>(isdigit(pcIPAddr[iCptCharIntoIPAddr])) {
                <font style="color:green;">// A byte of an IP address mustn't begin with a '0', except if '0' is alone</font>
                <font style="color:blue;">if </font>((iCptCharIntoByte == 0) && (pcIPAddr[iCptCharIntoIPAddr] == '0') && (isdigit(pcIPAddr[iCptCharIntoIPAddr+1]))) {
                    iResult = IP_ERR;
                }
                <font style="color:blue;">else </font>{
                    pstrByte[iCptCharIntoByte] = pcIPAddr[iCptCharIntoIPAddr];
                    iCptCharIntoIPAddr++;
                    iCptCharIntoByte++;
                }
            }
            <font style="color:blue;">else </font>{
                <font style="color:blue;">if </font>(pcIPAddr[iCptCharIntoIPAddr] == '.') {
                    <font style="color:green;">// If we are at the end of a byte
</font>
                    pstrByte[iCptCharIntoByte] = '\0';
                    iCptCharIntoByte = 0;
                    iCptCharIntoIPAddr++;
                    pcDestTab[sNbBytes] = atoi(pstrByte);
                    sNbBytes++;
                    <font style="color:blue;">if </font>((atoi(pstrByte) > 255) || (atoi(pstrByte) < 0)) {
                        <font style="color:green;">// Given that we are on 8 bits, the value must be into [0; 255]</font>
                        iResult = IP_ERR;
                    }
                }
                <font style="color:blue;">else </font>{
                    <font style="color:green;">// Any character different from a digit or a dot ('.')</font>
                    iResult = IP_ERR;
                }
            }
        } <font style="color:blue;">while </font>((pcIPAddr[iCptCharIntoIPAddr] != '\0') && (sNbBytes <= 3) && (iResult == IP_OK));
        <font style="color:blue;">if </font>((pcIPAddr[iCptCharIntoIPAddr] == '\0') && (sNbBytes <= 3) && (iResult == IP_OK)) {
            pstrByte[iCptCharIntoByte] = '\0';
            pcDestTab[sNbBytes] = atoi(pstrByte);
            sNbBytes++;
            <font style="color:blue;">if </font>((atoi(pstrByte) > 255) || (atoi(pstrByte) < 0)) {
                iResult = IP_ERR;
            }
        }
        <font style="color:green;">// IP Address must contain 4 bytes
</font>
        <font style="color:blue;">if </font>(sNbBytes != 4) {
            iResult = IP_ERR;
        }
    }
    <font style="color:blue;">return </font>iResult;
}

TOXCCT >>> GEII power

TOXCCT >>> GEII power

TOXCCT >>> GEII power

first one :
<font style="color:purple;">CATEGORY_CODE </font>stCatCode = {
    <font style="color:gray;">""</font>,
    0,
    <font style="color:gray;">""</font>,
    0,
    0
};     <font style="color:green;">// Values are given by default for a nil initialisation</font>
 
with a GNU compiler, you could also write :
<font style="color:purple;">CATEGORY_CODE </font>stCatCode = {
    strCategoryCode: <font style="color:gray;">""</font>,
    nCategoryID:     0,
    strCategoryName: <font style="color:gray;">""</font>,
    nHasSubCategory: 0,
    nActive:         0
};
 
 
second one :
<font style="color:purple;">CATEGORY_CODE </font>stCatCode;
stCatCode.strCategoryCode = <font style="color:gray;">""</font>;
stCatCode.nCategoryID     = 0;
stCatCode.strCategoryName = <font style="color:gray;">""</font>;
stCatCode.nHasSubCategory = 0;
stCatCode.nActive         = 0;

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TOXCCT >>> GEII power