Thread: Question in read file

I am a beginner in C and am having a problem when mapping documents into a file, because some lines contain null characters, how can I fix this?

Code:

void mapFilePositional(const char *breaker, int breakerPosition, document **documents, FILE **input){
	char		  *buffer;
	unsigned int  pivot 		= 0,
				  lineSize 		= 0,
				  breakerSize 	= strlen(breaker);
	unsigned long position 		= 0;

	buffer 	= (char*)malloc(BUFFER_SIZE * sizeof(char));
	
	while(fgets(buffer, BUFFER_SIZE, *input) != NULL){
	
		if(strncmp((buffer + breakerPosition - 1), breaker, breakerSize) == 0){
			if((pivot % DOCUMENT_SIZE) == 0){
				if(allocateDocument(documents, DOCUMENT_SIZE * ((pivot % DOCUMENT_SIZE) + 1)) == 0){
					printf("Error: error to allocate struct.!\n"); 
					abort();
				}
			}
			
			(*documents + pivot)->initialPosition 	= position;
			(*documents + pivot)->size				= lineSize;
			
			position += lineSize;
			lineSize = 0;
			pivot++;
		}
		lineSize +=  strlen(buffer);
	}

	free(buffer);
}