C语言技巧

把自己学习C语言的技巧记录下来，以免忘记，每天至少一更

File I/O

1. Size of File Descriptor Table is limited. Make sure to close file descriptor when read and write in a large number of times.

2. Use following format to read and write content from/to files:

byte_read = read(infd, buf, BLKSIZE);
...
write(outfd, buf, byte_read);

Optimization

1. Use local variable rather than dynamic memory allocation to prevent memory leak.

String

1. Do not use equal sign, use strcpy instead.

2. 当在函数中初始化一个local char* 时，用bzero初始化

定义含有自身type的struct时， 直接用struct + 自身type。

typedef struct queue_node {
    char* client;
    struct queue_node *next;
} queue_node_t;