所以我面临一个问题-当我的数据超过缓冲区的初始大小，并且在递归函数中进行了重新分配时，由于释放其缓冲区而出现错误。
* malloc：***对象0x100106da0错误：未被分配的指针被分配*
这是代码：
void recPrint(FILE *file, char *buffer, int realBufferSize, int bufferSize, char *freeCh, NodePtr* temp){
//some code here...
int *intArr = temp -> usedIndices;
int i = 0;
for(i = 0; i < 36; i++){
if(intArr[i] == 1){
if(i > 9){
*freeCh = i - 10 + 'a' ;
}else{
*freeCh = i + '0';
}
realBufferSize++;
if (realBufferSize >= bufferSize){
buffer = realloc(buffer, (bufferSize + 100) * sizeof(char)); // <<--- REALLOC here
bufferSize += 100;
}
freeCh++;
recPrint(file, buffer, realBufferSize, bufferSize, freeCh, &temp -> children[i]);
//now we need to remove all extra characters till the next turn
freeCh--;
*freeCh = '\0';
}
}
}
void printTrie(FILE *file, char *initialPath){
initPath = initialPath;
if(root.isParent == 0) return;
char *buffer;
char *freeCh;
int *intArr = root.usedIndices;
int bufferSize = 10;
int realBufferSize = 1000;
int i = 0;
for(i = 0; i < 36; i++){
buffer = calloc(1001, sizeof(char));
freeCh = buffer;
if(intArr[i] == 1){
if(i > 9){
*freeCh = i - 10 + 'a' ;
}else{
*freeCh = i + '0';
}
freeCh++;
realBufferSize++;
recPrint(file, buffer, realBufferSize, bufferSize, freeCh, &root.children[i]);
free(buffer); //<<--- getting error here
}
}
}
@WhozCraig的评论指出了问题所在。这是建议的修复方法。
realloc从返回ed缓冲区recPrint。
用于free返回的值recPrint。
char* recPrint(FILE *file, char *buffer, int realBufferSize,
int bufferSize, char *freeCh, NodePtr* temp){
....
// where you recurse...
buffer = recPrint(file, buffer, realBufferSize,
bufferSize, freeCh, &temp -> children[i]);
// and always return the *current* buffer pointer back to the caller.
return buffer;
}
在printTrie：
buffer = recPrint(file, buffer, realBufferSize, bufferSize, freeCh, &root.children[i]);
free(buffer);
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