Question

我有一个函数，它以特定方式混合2个字符串，并生成一个新字符串，如何分配新字符串的内存？

我尝试添加此代码，但不确定如何将其用于我不知道的字符串中。

#include <stdio.h>
#include <string.h>

char *CreateString(char *string1, char *string2) {
    int size;
    int size1 = 0;
    int size2 = 0;

    for (int i = 0; *(string1 + i); i++) {
        size1++;
    }

    for (int i = 0; *(string2 + i); i++) {
        size2++;
    }

    size = (size1 * size2) + size1;

    char string[size];
    char *stringptr = string;

    for(int i = 0; i < size; i = i + size2 + 1) {
        *(stringptr + i) = *(string1++);

        for (int j = 0; j < size2; j++) {
            *(stringptr + i + j + 1) = *(string2 + j);
        }
    }
    puts(string);
}

int main() {
    char string1[] = "chocolate";
    char string2[] = "123";

    CreateString(string1, string2);
    return 0;
}

Answer 1

使用strlen的{{1}}例程：

string.h

Answer 2

运行代码时，我得到的字符串：

<?php
$time = "01:30:00";

list($hours,$minutes,$seconds) = explode(":",$time);

$totalHours = $hours + $minutes/60 + $seconds/3600;

echo "total Hours: ".$totalHours;
//total Hours: 1.5

似乎您想在c123h123o123c123o123l123a123t123e123的每个字符之后添加string2。

因此，根据您的情况，您可以致电string2：

malloc

您的函数应在最后返回size = (size1 * size2) + size1; char *string = malloc(size + 1); // +1 for null character if(!string) { printf("cannot malloc for string\n"); return NULL; }。当您不想使用string以避免内存泄漏时，请不要忘记释放此函数的返回值。

下面的代码：

string

可以用for(int i=0;*(string1+i);i++){ size1++; } for(int i=0;*(string2+i);i++){ size2++; }函数代替：

strlen

Answer 3

给出您的描述，[摘自评论，给定：“ chocolate”“ 123”作为用户输入]
“ ...字符串如下所示：c123o123c123o123l123a123t123e123，但是我从用户那里获得了字符串。”
CreateString可能像这样简单：

char * CreateString(const char* string1,const char* string2)
{
    int len1 = strlen(string1);
    int len2 = strlen(string2);
    char *ptr = string1;

    char tempBuf[len1 + len1*len2 +1];// intermediate content buffer

    char *newString = calloc(len1 + len1*len2 +1, 1);
    if(newString)//test return of malloc
    {
        while(*ptr != NULL)//while each character is not NULL, stay in loop
        {//use combination of sprintf and strcat to interleave
         //components of new string
            sprintf(tempBuf, "%s%c", newString, *ptr);
            strcat(tempBuf, string2);
            sprintf(newString, "%s", tempBuf);
            ptr++;//increment pointer to next char in string1
        }                  
    }
    return newString;  //calling function should always check for null before using
}

int main(int argc, char *argv[])//Use this signature rather than 
{                               //int main(void) to allow user input
    if(argc != 3) //simple verification that command line contains 2 arguments
    {
        printf("%s\n", "Usage: prog.exe <string1> <string2>");
        return 0;
    }
    char *newString = CreateString(argv[1],argv[2]);
    if(newString)
    {   
        printf( "Resulting string is: %s\n", newString);
        free(newString); //free when finished
    }       
    return 0;
}

在用户输入"chocolate"和"123"的情况下，程序返回：

Answer 4

您可以使用以下方式为字符串分配内存

2020-05-20 11:56:04.979 [Connector-Scheduler-74f6c5d8-1] DEBUG org.eclipse.jetty.io.IdleTimeout - SocketChannelEndPoint@1aea799a{/110.54.160.90:41470<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=30000/30000}{io=1/1,kio=1,kro=1}->SslConnection@662a1f2b{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@4724da13{/110.54.160.90:41470<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=540007/30000}=>HTTP2ServerConnection@4fc8491c idle timeout check, elapsed: 30000 ms, remaining: 0 ms
2020-05-20 11:56:04.979 [Connector-Scheduler-74f6c5d8-1] DEBUG org.eclipse.jetty.io.IdleTimeout - SocketChannelEndPoint@1aea799a{/110.54.160.90:41470<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=30000/30000}{io=1/1,kio=1,kro=1}->SslConnection@662a1f2b{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@4724da13{/110.54.160.90:41470<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=540007/30000}=>HTTP2ServerConnection@4fc8491c idle timeout expired
2020-05-20 11:56:04.979 [Connector-Scheduler-74f6c5d8-1] DEBUG o.e.jetty.http2.HTTP2Connection - Ignored idle timeout on HTTP2ServerSession@720ff58e{l:/10.16.0.6:7171 <-> r:/110.54.160.90:41470,sendWindow=16777216,recvWindow=1047530,streams=3,NOT_CLOSED,null}: {}
2020-05-20 11:56:05.049 [Connector-Scheduler-74f6c5d8-1] DEBUG org.eclipse.jetty.io.IdleTimeout - HTTP2Stream@ad94434#11{sendWindow=16777216,recvWindow=524288,reset=false/false,REMOTELY_CLOSED,age=450006,attachment=ServerHttpChannelOverHTTP2@7dbb8795{s=HttpChannelState@6d3b17f6{s=WAITING rs=ASYNC os=OPEN is=IDLE awp=false se=false i=false al=0},r=1,c=false/false,a=WAITING,uri=https://{HOST}:7171/{ENDPOINT}=11335&type=sub,age=450007}#11} idle timeout check, elapsed: 30000 ms, remaining: 0 ms
2020-05-20 11:56:05.049 [Connector-Scheduler-74f6c5d8-1] DEBUG org.eclipse.jetty.io.IdleTimeout - HTTP2Stream@ad94434#11{sendWindow=16777216,recvWindow=524288,reset=false/false,REMOTELY_CLOSED,age=450006,attachment=ServerHttpChannelOverHTTP2@7dbb8795{s=HttpChannelState@6d3b17f6{s=WAITING rs=ASYNC os=OPEN is=IDLE awp=false se=false i=false al=0},r=1,c=false/false,a=WAITING,uri=https://{HOST}:7171/{ENDPOINT}=11335&type=sub,age=450007}#11} idle timeout expired
2020-05-20 11:56:05.049 [Connector-Scheduler-74f6c5d8-1] DEBUG org.eclipse.jetty.http2.HTTP2Stream - Idle timeout 30000ms expired on HTTP2Stream@ad94434#11{sendWindow=16777216,recvWindow=524288,reset=false/false,REMOTELY_CLOSED,age=450006,attachment=ServerHttpChannelOverHTTP2@7dbb8795{s=HttpChannelState@6d3b17f6{s=WAITING rs=ASYNC os=OPEN is=IDLE awp=false se=false i=false al=0},r=1,c=false/false,a=WAITING,uri=https://{HOST}:7171/{ENDPOINT}=11335&type=sub,age=450007}#11}
2020-05-20 11:56:05.049 [Connector-Scheduler-74f6c5d8-1] DEBUG o.e.j.h.s.HttpTransportOverHTTP2 - HTTP2 Response #11/11a5a716 idle timeout ignored
java.util.concurrent.TimeoutException: Idle timeout expired: 30000/30000 ms
    at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:171)
    at org.eclipse.jetty.io.IdleTimeout.idleCheck(IdleTimeout.java:113)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
    2020-05-20 11:56:05.049 [Connector-Scheduler-74f6c5d8-1] DEBUG o.e.jetty.http2.HTTP2Connection - Ignored idle timeout on HTTP2Stream@ad94434#11{sendWindow=16777216,recvWindow=524288,reset=false/false,REMOTELY_CLOSED,age=450006,attachment=ServerHttpChannelOverHTTP2@7dbb8795{s=HttpChannelState@6d3b17f6{s=WAITING rs=ASYNC os=OPEN is=IDLE awp=false se=false i=false al=0},r=1,c=false/false,a=WAITING,uri=https://{HOST}:7171/{ENDPOINT}=11335&type=sub,age=450007}#11}: {}
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.ManagedSelector - Selector sun.nio.ch.EPollSelectorImpl@1530ee6d woken up from select, 1/1/156 selected
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.ManagedSelector - Selector sun.nio.ch.EPollSelectorImpl@1530ee6d processing 1 keys, 0 updates
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.ManagedSelector - selected 1 channel=java.nio.channels.SocketChannel[connected local=/10.16.0.6:7171 remote=/194.208.155.11:40676], selector=sun.nio.ch.EPollSelectorImpl@1530ee6d, interestOps=1, readyOps=1 SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}{io=1/1,kio=1,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d 
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.ChannelEndPoint - onSelected 1->0 r=true w=false for SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}{io=1/0,kio=1,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.ChannelEndPoint - task CEP:SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}{io=1/0,kio=1,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d:runFillable:EITHER
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG o.e.j.u.t.ReservedThreadExecutor - ReservedThreadExecutor@6a969fb8{s=2/2,p=0} tryExecute EatWhatYouKill@771db12c/SelectorProducer@522ba524/PRODUCING/p=false/QueuedThreadPool[qtp897848096]@35841320{STARTED,8<=12<=200,i=8,r=2,q=0}[ReservedThreadExecutor@6a969fb8{s=2/2,p=0}][pc=9,pic=39,pec=56,epc=12927]@2020-05-20T11:56:05.101877Z
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG o.e.j.u.t.ReservedThreadExecutor - ReservedThreadExecutor@6a969fb8{s=1/2,p=0}@e0a082e offer EatWhatYouKill@771db12c/SelectorProducer@522ba524/PRODUCING/p=false/QueuedThreadPool[qtp897848096]@35841320{STARTED,8<=12<=200,i=8,r=2,q=0}[ReservedThreadExecutor@6a969fb8{s=1/2,p=0}][pc=9,pic=39,pec=56,epc=12927]@2020-05-20T11:56:05.101908Z
2020-05-20 11:56:05.101 [qtp897848096-2890] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@771db12c/SelectorProducer@522ba524/IDLE/p=true/QueuedThreadPool[qtp897848096]@35841320{STARTED,8<=12<=200,i=8,r=2,q=0}[ReservedThreadExecutor@6a969fb8{s=1/2,p=0}][pc=9,pic=39,pec=56,epc=12927]@2020-05-20T11:56:05.10194Z m=EXECUTE_PRODUCE_CONSUME t=CEP:SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}{io=1/0,kio=1,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d:runFillable:EITHER/EITHER
2020-05-20 11:56:05.101 [qtp897848096-2875] DEBUG o.e.j.u.t.ReservedThreadExecutor - ReservedThreadExecutor@6a969fb8{s=1/2,p=0}@e0a082e task=EatWhatYouKill@771db12c/SelectorProducer@522ba524/IDLE/p=true/QueuedThreadPool[qtp897848096]@35841320{STARTED,8<=12<=200,i=8,r=2,q=0}[ReservedThreadExecutor@6a969fb8{s=1/2,p=0}][pc=9,pic=39,pec=56,epc=12927]@2020-05-20T11:56:05.101972Z
2020-05-20 11:56:05.102 [qtp897848096-2875] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@771db12c/SelectorProducer@522ba524/IDLE/p=true/QueuedThreadPool[qtp897848096]@35841320{STARTED,8<=12<=200,i=8,r=2,q=0}[ReservedThreadExecutor@6a969fb8{s=1/2,p=0}][pc=9,pic=39,pec=56,epc=12928]@2020-05-20T11:56:05.102015Z tryProduce true
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.FillInterest - fillable FillInterest@6289cab9{SSLC.NBReadCB@51776ee4{SslConnection@51776ee4::SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}{io=1/0,kio=1,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d}}
2020-05-20 11:56:05.102 [qtp897848096-2875] DEBUG org.eclipse.jetty.io.ManagedSelector - updateable 0
2020-05-20 11:56:05.102 [qtp897848096-2875] DEBUG org.eclipse.jetty.io.ManagedSelector - updates 0
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.io.ssl.SslConnection - >c.onFillable SslConnection@51776ee4::SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000}{io=1/0,kio=1,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d
2020-05-20 11:56:05.102 [qtp897848096-2875] DEBUG org.eclipse.jetty.io.ChannelEndPoint - Key interests updated 1 -> 0 on SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000}{io=0/0,kio=0,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d
2020-05-20 11:56:05.102 [qtp897848096-2875] DEBUG org.eclipse.jetty.io.ManagedSelector - Selector sun.nio.ch.EPollSelectorImpl@1530ee6d waiting with 156 keys
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.io.ssl.SslConnection - onFillable SslConnection@51776ee4::SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000}{io=0/0,kio=0,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=INTERESTED,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=FI,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.FillInterest - fillable FillInterest@2e4aca68{org.eclipse.jetty.http2.HTTP2Connection$FillableCallback@3c01c9c5}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.jetty.http2.HTTP2Connection - HTTP2 onFillable HTTP2ServerConnection@5269686d::DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000} 
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.jetty.http2.HTTP2Connection - HTTP2 produce HTTP2ServerConnection@5269686d::DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000} 
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.j.u.t.strategy.EatWhatYouKill - EatWhatYouKill@3c801a15/HTTP2Producer@a602086/IDLE/p=false/QueuedThreadPool[qtp897848096]@35841320{STARTED,8<=12<=200,i=8,r=2,q=0}[ReservedThreadExecutor@6a969fb8{s=1/2,p=0}][pc=0,pic=0,pec=0,epc=3]@2020-05-20T11:56:05.102181Z tryProduce false
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.jetty.http2.HTTP2Connection - Dequeued task null
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.jetty.http2.HTTP2Connection - Acquired NetworkBuffer@2e9c5b61{HeapByteBuffer@7e4d63f9[p=0,l=0,c=17408,r=0]={<<<>>>\x00\x00"\x01\x05\x00\x00\x00\x0b...\x00\x00\x00\x00\x00\x00\x00},r=1}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.io.ssl.SslConnection - >fill SslConnection@51776ee4::SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000}{io=0/0,kio=0,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=IDLE,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.io.ssl.SslConnection - fill NOT_HANDSHAKING
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG org.eclipse.jetty.io.ChannelEndPoint - filled 42 HeapByteBuffer@7f14d7ed[p=0,l=42,c=17408,r=42]={<<<\x17\x03\x03\x00%\x00\x00\x00\x00\x00\x00\x00\x08\x17i0\x0f\x02\xB2\x9ac\xD0U99\xDa-q\xFaXT\x07\x90R2\x9c\x13\xE720\x10E>>>\xCe\xC4~ez\x0b\x93\xDa\xAb...\x00\x00\x00\x00\x00\x00\x00}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.io.ssl.SslConnection - net filled=42
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.io.ssl.SslConnection - unwrap net_filled=42 Status = OK HandshakeStatus = NOT_HANDSHAKING bytesConsumed = 42 bytesProduced = 13 encryptedBuffer=[p=42,l=42,c=17408,r=0] unwrapBuffer=HeapByteBuffer@7e4d63f9[p=0,l=13,c=17408,r=13]={<<<\x00\x00\x04\x03\x00\x00\x00\x00\x03\x00\x00\x00\x08>>>\x93\xC6j\n\xC0\xEb\xAd\x89\x8a...\x00\x00\x00\x00\x00\x00\x00} appBuffer=HeapByteBuffer@7e4d63f9[p=0,l=13,c=17408,r=13]={<<<\x00\x00\x04\x03\x00\x00\x00\x00\x03\x00\x00\x00\x08>>>\x93\xC6j\n\xC0\xEb\xAd\x89\x8a...\x00\x00\x00\x00\x00\x00\x00}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.io.ssl.SslConnection - <fill f=13 uf=false SslConnection@51776ee4::SocketChannelEndPoint@6a358a13{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=0/30000}{io=0/0,kio=0,kro=1}->SslConnection@51776ee4{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=IDLE,flush=IDLE}~>DecryptedEndPoint@345f0a02{/194.208.155.11:40676<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=589/30000}=>HTTP2ServerConnection@5269686d
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.jetty.http2.HTTP2Connection - Filled 13 bytes in NetworkBuffer@2e9c5b61{HeapByteBuffer@7e4d63f9[p=0,l=13,c=17408,r=13]={<<<\x00\x00\x04\x03\x00\x00\x00\x00\x03\x00\x00\x00\x08>>>\x93\xC6j\n\xC0\xEb\xAd\x89\x8a...\x00\x00\x00\x00\x00\x00\x00},r=1}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.jetty.http2.parser.ServerParser - Parsing java.nio.HeapByteBuffer[pos=0 lim=13 cap=17408]
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.eclipse.jetty.http2.parser.Parser - Parsed [RST_STREAM|4|0|3] frame header from java.nio.HeapByteBuffer[pos=9 lim=13 cap=17408]
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG org.eclipse.jetty.http2.HTTP2Session - Received ResetFrame@6859fe12#3{cancel_stream_error}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG org.eclipse.jetty.http2.HTTP2Session - Removed remote HTTP2Stream@728ac07f#3{sendWindow=16777216,recvWindow=524288,reset=false/true,CLOSED,age=324671,attachment=ServerHttpChannelOverHTTP2@7f28ff8d{s=HttpChannelState@3a9673c7{s=WAITING rs=ASYNC os=OPEN is=IDLE awp=false se=false i=false al=0},r=1,c=false/false,a=WAITING,uri=https://{HOST}:7171/{ENDPOINT}=1633&type=sub,age=324672}#3}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.jetty.http2.HTTP2Connection - Processing failure on HTTP2Stream@728ac07f#3{sendWindow=16777216,recvWindow=524288,reset=false/true,CLOSED,age=324672,attachment=ServerHttpChannelOverHTTP2@7f28ff8d{s=HttpChannelState@3a9673c7{s=WAITING rs=ASYNC os=OPEN is=IDLE awp=false se=false i=false al=0},r=1,c=false/false,a=WAITING,uri=https://{HOST}:7171/{ENDPOINT}=1633&type=sub,age=324672}#3}: {}
2020-05-20 11:56:05.102 [qtp897848096-2890] DEBUG o.e.j.h.s.HttpTransportOverHTTP2 - HTTP2 Response #3/724f0d35 flush ignored
org.eclipse.jetty.io.EofException: Reset cancel_stream_error
    at org.eclipse.jetty.http2.server.HTTP2ServerConnectionFactory$HTTPServerSessionListener.onReset(HTTP2ServerConnectionFactory.java:157)
    at org.eclipse.jetty.http2.HTTP2Stream.notifyReset(HTTP2Stream.java:574)
    at org.eclipse.jetty.http2.HTTP2Stream.onReset(HTTP2Stream.java:343)
    at org.eclipse.jetty.http2.HTTP2Stream.process(HTTP2Stream.java:252)
    at org.eclipse.jetty.http2.HTTP2Session.onReset(HTTP2Session.java:295)
    at org.eclipse.jetty.http2.parser.Parser$Listener$Wrapper.onReset(Parser.java:372)
    at org.eclipse.jetty.http2.parser.BodyParser.notifyReset(BodyParser.java:144)
    at org.eclipse.jetty.http2.parser.ResetBodyParser.onReset(ResetBodyParser.java:97)
    at org.eclipse.jetty.http2.parser.ResetBodyParser.parse(ResetBodyParser.java:66)
    at org.eclipse.jetty.http2.parser.Parser.parseBody(Parser.java:198)
    at org.eclipse.jetty.http2.parser.Parser.parse(Parser.java:127)
    at org.eclipse.jetty.http2.parser.ServerParser.parse(ServerParser.java:115)
    at org.eclipse.jetty.http2.HTTP2Connection$HTTP2Producer.produce(HTTP2Connection.java:248)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produceTask(EatWhatYouKill.java:360)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:184)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:135)
    at org.eclipse.jetty.http2.HTTP2Connection.produce(HTTP2Connection.java:170)
    at org.eclipse.jetty.http2.HTTP2Connection.onFillable(HTTP2Connection.java:125)
    at org.eclipse.jetty.http2.HTTP2Connection$FillableCallback.succeeded(HTTP2Connection.java:348)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
    at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:543)
    at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:398)
    at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:161)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
    at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
    at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:388)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
    at java.base/java.lang.Thread.run(Thread.java:834)

请注意，您可以使用2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG org.eclipse.jetty.http2.HTTP2Session - Disconnecting HTTP2ServerSession@1a9813fd{l:/10.16.0.6:7171 <-> r:/152.32.102.11:43890,sendWindow=16777216,recvWindow=1048437,streams=0,CLOSED,null} 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.AbstractEndPoint - close DecryptedEndPoint@1456064f{/152.32.102.11:43890<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=115/30000} 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.AbstractEndPoint - close(null) DecryptedEndPoint@1456064f{/152.32.102.11:43890<->/10.16.0.6:7171,OPEN,fill=-,flush=-,to=115/30000} 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.ssl.SslConnection - shutdownOutput: SslConnection@4d317d32::SocketChannelEndPoint@31397a33{/152.32.102.11:43890<->/10.16.0.6:7171,ISHUT,fill=-,flush=-,to=115/30000}{io=1/0,kio=1,kro=1}->SslConnection@4d317d32{NOT_HANDSHAKING,eio=-1/-1,di=-1,fill=IDLE,flush=IDLE}~>DecryptedEndPoint@1456064f{/152.32.102.11:43890<->/10.16.0.6:7171,CLOSED,fill=-,flush=-,to=115/30000}=>HTTP2ServerConnection@7ebcadd4 oshut=false, ishut=true 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.ssl.SslConnection - >flush SslConnection@4d317d32::SocketChannelEndPoint@31397a33{/152.32.102.11:43890<->/10.16.0.6:7171,ISHUT,fill=-,flush=-,to=115/30000}{io=1/0,kio=1,kro=1}->SslConnection@4d317d32{NEED_WRAP,eio=-1/-1,di=-1,fill=IDLE,flush=IDLE}~>DecryptedEndPoint@1456064f{/152.32.102.11:43890<->/10.16.0.6:7171,CLOSED,fill=-,flush=-,to=115/30000}=>HTTP2ServerConnection@7ebcadd4 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.ssl.SslConnection - flush b[0]=HeapByteBuffer@17a64e32[p=0,l=0,c=0,r=0]={<<<>>>} 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.ssl.SslConnection - flush NEED_WRAP 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.ssl.SslConnection - wrap Status = CLOSED HandshakeStatus = NEED_UNWRAP bytesConsumed = 0 bytesProduced = 31 sequenceNumber = 3 [p=0,l=31,c=17408,r=31] ioDone=false/true 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG org.eclipse.jetty.io.ChannelEndPoint - flushed 31 SocketChannelEndPoint@31397a33{/152.32.102.11:43890<->/10.16.0.6:7171,ISHUT,fill=-,flush=-,to=115/30000}{io=1/0,kio=1,kro=1}->SslConnection@4d317d32{NEED_UNWRAP,eio=-1/0,di=-1,fill=IDLE,flush=IDLE}~>DecryptedEndPoint@1456064f{/152.32.102.11:43890<->/10.16.0.6:7171,CLOSED,fill=-,flush=-,to=115/30000}=>HTTP2ServerConnection@7ebcadd4 2020-05-20 11:56:10.528 [qtp897848096-2877] DEBUG o.eclipse.jetty.io.ssl.SslConnection - net flushed=true, ac=true 2020-05-20 11:56:10.528 [qtp897848096-2875] DEBUG org.eclipse.jetty.io.WriteFlusher - ignored: WriteFlusher@2fa70bfd{IDLE}->null java.nio.channels.ClosedChannelException: null at org.eclipse.jetty.io.WriteFlusher.onClose(WriteFlusher.java:521) at org.eclipse.jetty.io.AbstractEndPoint.onClose(AbstractEndPoint.java:354) at org.eclipse.jetty.io.ChannelEndPoint.onClose(ChannelEndPoint.java:214) at org.eclipse.jetty.io.AbstractEndPoint.doOnClose(AbstractEndPoint.java:225) at org.eclipse.jetty.io.AbstractEndPoint.shutdownOutput(AbstractEndPoint.java:157) at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.flush(SslConnection.java:1081) at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.doShutdownOutput(SslConnection.java:1278) at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.doClose(SslConnection.java:1343) at org.eclipse.jetty.io.AbstractEndPoint.doOnClose(AbstractEndPoint.java:220) at org.eclipse.jetty.io.AbstractEndPoint.close(AbstractEndPoint.java:192) at org.eclipse.jetty.io.AbstractEndPoint.close(AbstractEndPoint.java:175) at org.eclipse.jetty.http2.HTTP2Session.disconnect(HTTP2Session.java:1023) at org.eclipse.jetty.http2.HTTP2Session.terminate(HTTP2Session.java:1045) at org.eclipse.jetty.http2.HTTP2Session.access$1200(HTTP2Session.java:72) at org.eclipse.jetty.http2.HTTP2Session$TerminateCallback.complete(HTTP2Session.java:1647) at org.eclipse.jetty.http2.HTTP2Session$TerminateCallback.succeeded(HTTP2Session.java:1628) at org.eclipse.jetty.util.Callback$Nested.succeeded(Callback.java:266) at org.eclipse.jetty.util.CountingCallback.succeeded(CountingCallback.java:68) at org.eclipse.jetty.http2.server.HttpChannelOverHTTP2$FailureTask.run(HttpChannelOverHTTP2.java:407) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:135) at org.eclipse.jetty.http2.HTTP2Connection.produce(HTTP2Connection.java:170) at org.eclipse.jetty.http2.HTTP2Connection.onFillable(HTTP2Connection.java:125) at org.eclipse.jetty.http2.HTTP2Connection$FillableCallback.succeeded(HTTP2Connection.java:348) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)中的字符串函数来简化代码：

char *stringptr = malloc(size + 1);

如何为可变长度的字符串分配内存？

4 个答案: