用strtok分割句子时内存泄漏

Question

我正在尝试将一个字符串拆分成句子(由句子分隔符分隔).代码本身它工作但我不断在函数中发生内存泄漏.

char ** splitSentences(char *string) {

int sentencecount = 0;
char* buf = NULL;
char* str = NULL;

buf = malloc((strlen(string) + 1) * sizeof(char));
strcpy(buf,string);

str = buf;

sentencecount = countSentences(str);

if(sentencecount != 0)
{
    char** sentences = NULL;
    sentences = malloc((sentencecount + 1)*sizeof(char*));
    memset(sentences,0,sentencecount+1);

    char* strToken = NULL;
    strToken = malloc((strlen(str)+1)*sizeof(char));
    memset(strToken,0,strlen(str)+1);

    strToken = strtok(str, SENTENCE_DELIMITERS);

    int i = 0;

    while(strToken != NULL) {
        sentences[i] = NULL;
        sentences[i] = malloc((strlen(strToken)+1)*sizeof(char));
        strncpy(sentences[i], strToken,strlen(strToken) + 1);
        strToken = strtok(NULL, SENTENCE_DELIMITERS);
        i++;
    }

    sentences[sentencecount] = NULL;

    //Free the memory
    free(strToken);
    strToken = NULL;

    free(buf);
    buf = NULL;

    return sentences;
}

return NULL;

}

我找不到它泄漏记忆的原因.有人知道吗？

Answer 1

这是内存泄漏:

strToken = malloc((strlen(str)+1)*sizeof(char));
// ...
strToken = strtok(str, SENTENCE_DELIMITERS);

您为对象分配空间malloc,然后在调用后丢失指向该空间的指针strtok.