C++ MALLOCVAR函数代码示例

struct fillobj *
pamd_fill_create(void) {

    fillobj * fillObjP;
    struct fillState * stateP;

    MALLOCVAR(fillObjP);
    if (fillObjP == NULL)
        pm_error("out of memory allocating a fillhandle");

    MALLOCVAR(stateP);
    if (stateP == NULL)
        pm_error("out of memory allocating a fillhandle");

    stateP->n = 0;
    stateP->size = SOME;
    MALLOCARRAY(stateP->coords, stateP->size);
    if (stateP->coords == NULL)
        pm_error("out of memory allocating a fillhandle");
    stateP->curedge = 0;

    fillObjP->stateP = stateP;
    
    /* Turn off line clipping. */
    /* UGGH! We must eliminate this global variable */
    oldclip = pamd_setlineclip(0);
    
    return fillObjP;
}

struct lock *
xmlrpc_lock_create_windows(void) {

    struct lock * lockP;

    MALLOCVAR(lockP);

    if (lockP) {
        CRITICAL_SECTION * criticalSectionP;

        MALLOCVAR(criticalSectionP);

        if (criticalSectionP) {
            InitializeCriticalSection(criticalSectionP);

            lockP->implementationP = criticalSectionP;
            lockP->acquire = &acquire;
            lockP->release = &release;
            lockP->destroy = &destroy;
        } else {
            free(lockP);
            lockP = NULL;
        }
    }
    return lockP;
}

static void
createPath(const char * const pathText,
           style        const style,
           path **      const pathPP) {
/*----------------------------------------------------------------------------
   Create a path as described by a <path> element whose "style" attribute
   indicates style 'style' and whose "d" attribute indicates path data
   'pathText'.
-----------------------------------------------------------------------------*/
    bool error;
    path * pathP;
    
    MALLOCVAR(pathP);
    if (pathP == NULL)
        error = TRUE;
    else {
        pathP->style = style;

        pathP->pathText = strdup(pathText);
        if (pathP->pathText == NULL)
            error = TRUE;
        else {
            pathP->pathTextLength = strlen(pathP->pathText);

            error = FALSE;
        }
        if (error)
            free(pathP);
    }
    if (error )
        *pathPP = NULL;
    else
        *pathPP = pathP;
}

xmlrpc_server_info *
xmlrpc_server_info_new(xmlrpc_env * const envP,
                       const char * const serverUrl) {
    
    xmlrpc_server_info * serverInfoP;

    XMLRPC_ASSERT_ENV_OK(envP);
    XMLRPC_ASSERT_PTR_OK(serverUrl);

    MALLOCVAR(serverInfoP);
    if (serverInfoP == NULL)
        xmlrpc_faultf(envP, "Couldn't allocate memory for xmlrpc_server_info");
    else {
        serverInfoP->serverUrl = strdup(serverUrl);
        if (serverInfoP->serverUrl == NULL)
            xmlrpc_faultf(envP, "Couldn't allocate memory for server URL");
        else {
            serverInfoP->allowedAuth.basic        = false;
            serverInfoP->allowedAuth.digest       = false;
            serverInfoP->allowedAuth.gssnegotiate = false;
            serverInfoP->allowedAuth.ntlm         = false;
            serverInfoP->userNamePw = NULL;
            serverInfoP->basicAuthHdrValue = NULL;
            if (envP->fault_occurred)
                xmlrpc_strfree(serverInfoP->serverUrl);
        }
        if (envP->fault_occurred)
            free(serverInfoP);
    }
    return serverInfoP;
}

void
ppmd_read_font(FILE *                        const ifP,
               const struct ppmd_font **     const fontPP) {

    unsigned int relativeCodePoint;
    struct ppmd_glyph * glyphTable;
    struct ppmd_font * fontP;

    MALLOCVAR(fontP);
    if (fontP == NULL)
        pm_error("Insufficient memory for font header");

    readFontHeader(ifP, &fontP->header);

    MALLOCARRAY(glyphTable, fontP->header.characterCount);
    if (glyphTable == NULL)
        pm_error("Insufficient memory to store %u characters",
                 fontP->header.characterCount);

    for (relativeCodePoint = 0;
         relativeCodePoint < fontP->header.characterCount;
         ++relativeCodePoint) {

        readCharacter(ifP, &glyphTable[relativeCodePoint]);
    }
    fontP->glyphTable = glyphTable;
    *fontPP = fontP;
}

void
xmlrpc_methodCreate(xmlrpc_env *           const envP,
                    xmlrpc_method1               methodFnType1,
                    xmlrpc_method2               methodFnType2,
                    void *                 const userData,
                    const char *           const signatureString,
                    const char *           const helpText,
                    xmlrpc_methodInfo **   const methodPP) {

    xmlrpc_methodInfo * methodP;

    XMLRPC_ASSERT_ENV_OK(envP);

    MALLOCVAR(methodP);

    if (methodP == NULL)
        xmlrpc_faultf(envP, "Unable to allocate storage for a method "
                      "descriptor");
    else {
        methodP->methodFnType1  = methodFnType1;
        methodP->methodFnType2  = methodFnType2;
        methodP->userData       = userData;
        methodP->helpText       = strdup(helpText);

        makeSignatureList(envP, signatureString, &methodP->signatureListP);

        if (envP->fault_occurred)
            free(methodP);

        *methodPP = methodP;
    }
}

static void
createFileImage(TFile **     const filePP,
                const char * const name,
                uint32_t     const attrib,
                bool         const createFile,
                bool *       const succeededP) {

    TFile * fileP;

    MALLOCVAR(fileP);
    if (fileP == NULL)
        *succeededP = FALSE;
    else {
        int rc;

        if (createFile)
            rc = open(name, attrib | O_CREAT, S_IWRITE | S_IREAD);
        else
            rc = open(name, attrib);

        if (rc < 0)
            *succeededP = FALSE;
        else {
            fileP->fd = rc;
            *succeededP = TRUE;
        }
        if (!*succeededP)
            free(fileP);
    }
    *filePP = fileP;
}

static IC_Entry 
readICEntry (void) 
{
    IC_Entry entry;

    MALLOCVAR(entry);

    if (entry == NULL)
        pm_error("Unable to allcoate memory for IC entry");

    entry->width         = readU1();
    entry->height        = readU1();
    entry->color_count   = readU1();
    entry->reserved      = readU1();
    entry->planes        = readU2();
    entry->bitcount      = readU2();
    entry->size_in_bytes = readU4();
    entry->file_offset   = readU4();
    entry->colors        = NULL;
    entry->ih            = NULL;
    entry->xorBitmap     = NULL;
    entry->andBitmap     = NULL;
    
    return entry;
}

static void
createServer(struct _TServer ** const srvPP,
             bool               const noAccept,
             TChanSwitch *      const chanSwitchP,
             bool               const userChanSwitch,
             unsigned short     const portNumber,             
             const char **      const errorP) {

    struct _TServer * srvP;

    MALLOCVAR(srvP);

    if (srvP == NULL) {
        xmlrpc_asprintf(errorP,
                        "Unable to allocate space for server descriptor");
    } else {
        setupTrace(srvP);

        srvP->terminationRequested = false;

        initChanSwitchStuff(srvP, noAccept, chanSwitchP, userChanSwitch,
                            portNumber, errorP);

        if (!*errorP) {
            srvP->builtinHandlerP = HandlerCreate();
            if (!srvP->builtinHandlerP)
                xmlrpc_asprintf(errorP, "Unable to allocate space for "
                                "builtin handler descriptor");
            else {
                srvP->defaultHandler   = HandlerDefaultBuiltin;
                srvP->defaultHandlerContext = srvP->builtinHandlerP;

                srvP->name             = strdup("unnamed");
                srvP->logfilename      = NULL;
                srvP->keepalivetimeout = 15;
                srvP->keepalivemaxconn = 30;
                srvP->timeout          = 15;
                srvP->advertise        = TRUE;
                srvP->useSigchld       = FALSE;
                srvP->uriHandlerStackSize = 0;
                srvP->maxConn          = 15;
                srvP->maxConnBacklog   = 15;
            
                initUnixStuff(srvP);

                ListInitAutoFree(&srvP->handlers);

                srvP->logfileisopen = FALSE;
                
                *errorP = NULL;

                if (*errorP)
                    HandlerDestroy(srvP->builtinHandlerP);
            }
        }        
        if (*errorP)
            free(srvP);
    }
    *srvPP = srvP;
}

static void
disposeOfCommandTokens(struct tokenSet * const tokenSetP,
                       struct script *   const scriptP) {

    /* We've got a whole command in 'tokenSet'.  Parse it into *scriptP
       and reset tokenSet to empty.
    */
    
    struct commandListElt * commandListEltP;
    
    MALLOCVAR(commandListEltP);
    if (commandListEltP == NULL)
        pm_error("Out of memory allocating command list element frame");

    parseDrawCommand(*tokenSetP, &commandListEltP->commandP);

    {
        unsigned int i;
        for (i = 0; i < tokenSetP->count; ++i)
            pm_strfree(tokenSetP->token[i]);
        tokenSetP->count = 0;
    }
    /* Put the list element for this command at the tail of the list */
    commandListEltP->nextP = NULL;
    if (scriptP->commandListTailP)
        scriptP->commandListTailP->nextP = commandListEltP;
    else
        scriptP->commandListHeadP = commandListEltP;

    scriptP->commandListTailP = commandListEltP;
}

void
SocketUnixCreate(TSocket ** const socketPP) {

    struct socketUnix * socketUnixP;

    MALLOCVAR(socketUnixP);

    if (socketUnixP) {
        int rc;
        rc = socket(AF_INET, SOCK_STREAM, 0);
        if (rc < 0)
            *socketPP = NULL;
        else {
            socketUnixP->fd = rc;
            socketUnixP->userSuppliedFd = FALSE;

            {
                int32_t n = 1;
                int rc;
                rc = setsockopt(socketUnixP->fd, SOL_SOCKET, SO_REUSEADDR,
                                (char*)&n, sizeof(n));
                if (rc < 0)
                    *socketPP = NULL;
                else
                    SocketCreate(&vtbl, socketUnixP, socketPP);
            }
            if (!*socketPP)
                close(socketUnixP->fd);
        }
        if (!*socketPP)
            free(socketUnixP);
    } else
        *socketPP = NULL;
}

static void
makeChannelFromSsl(SSL *         const sslP,
                   TChannel **   const channelPP,
                   const char ** const errorP) {

    struct channelOpenssl * channelOpensslP;

    MALLOCVAR(channelOpensslP);
    
    if (channelOpensslP == NULL)
        xmlrpc_asprintf(errorP, "Unable to allocate memory for OpenSSL "
                        "socket descriptor");
    else {
        TChannel * channelP;
        
        channelOpensslP->sslP = sslP;
        channelOpensslP->userSuppliedSsl = TRUE;
        
        /* This should be ok as far as I can tell */
        ChannelCreate(&channelVtbl, channelOpensslP, &channelP);
        
        if (channelP == NULL)
            xmlrpc_asprintf(errorP, "Unable to allocate memory for "
                            "channel descriptor.");
        else {
            *channelPP = channelP;
            *errorP = NULL;
        }
        if (*errorP)
            free(channelOpensslP);
    }
}

xmlrpc_value *
xmlrpc_datetime_new(xmlrpc_env *const envP,
                    xmlrpc_datetime const dt) {

    xmlrpc_value *valP;

    const char **readBufferP;

    MALLOCVAR(readBufferP);

    if (!readBufferP)
        xmlrpc_faultf(envP, "Couldn't get memory for the cache part of the "
                "XML-RPC datetime value object");

    else {
        *readBufferP = NULL;

        xmlrpc_createXmlrpcValue(envP, &valP);

        if (!envP->fault_occurred) {
            valP->_type = XMLRPC_TYPE_DATETIME;

            valP->_value.dt = dt;

            valP->_cache = readBufferP;
        }
        if (envP->fault_occurred)
            free(readBufferP);
    }
    return valP;
}

curlMulti *
curlMulti_create(void) {

    curlMulti * retval;
    curlMulti * curlMultiP;

    MALLOCVAR(curlMultiP);

    if (curlMultiP == NULL)
        retval = NULL;
    else {
        curlMultiP->lockP = xmlrpc_lock_create();

        if (curlMultiP->lockP == NULL)
            retval = NULL;
        else {
            curlMultiP->curlMultiP = curl_multi_init();
            if (curlMultiP->curlMultiP == NULL)
                retval = NULL;
            else
                retval = curlMultiP;

            if (retval == NULL)
                curlMultiP->lockP->destroy(curlMultiP->lockP);
        }
        if (retval == NULL)
            free(curlMultiP);
    }
    return retval;
}

struct sourceManager * 
dsCreateSource(const char * const fileName) {

    struct sourceManager * srcP;

    MALLOCVAR(srcP);
    if (srcP == NULL)
        pm_error("Unable to get memory for the Jpeg library source manager.");

    srcP->ifP = pm_openr(fileName);

    srcP->jpegSourceMgr.init_source = dsInitSource;
    srcP->jpegSourceMgr.fill_input_buffer = dsFillInputBuffer;
    srcP->jpegSourceMgr.skip_input_data = dsSkipInputData;
    srcP->jpegSourceMgr.resync_to_restart = jpeg_resync_to_restart;
    srcP->jpegSourceMgr.term_source = dsTermSource;
    
    srcP->prematureEof = FALSE;
    srcP->currentBuffer = srcP->buffer1;
    srcP->nextBuffer = srcP->buffer2;
    srcP->jpegSourceMgr.bytes_in_buffer = 
        fread(srcP->currentBuffer, 1, BUFFER_SIZE, srcP->ifP);
    srcP->jpegSourceMgr.next_input_byte = srcP->currentBuffer;
    srcP->bytesInNextBuffer = 
        fread(srcP->nextBuffer, 1, BUFFER_SIZE, srcP->ifP);

    return srcP;
}