c语言语法规范
1.#include后面要先加空格
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
2.指针后面的*号要跟在变量名后面
aeEventLoop *el;
const char *hostip;
const char *hostsocket;
3.结构体的括号
typedef struct benchmarkThread {
int index;
pthread_t thread;
aeEventLoop *el;
} benchmarkThread;
4.函数声明加上变量名
char *redisGitSHA1(void);
char *redisGitDirty(void);
static void writeHandler(aeEventLoop *el, int fd, void *privdata, int mask);
static void createMissingClients(client c);
static benchmarkThread *createBenchmarkThread(int index);
static void freeBenchmarkThread(benchmarkThread *thread);
5.if ,while,for后面先加空格,也就是说()前面要加空格，但是函数调用不用。
if (strtoll(redisGitSHA1(),NULL,16)) {
version = sdscatprintf(version, " (git:%s", redisGitSHA1());
if (strtoll(redisGitDirty(),NULL,10))
version = sdscatprintf(version, "-dirty");
version = sdscat(version, ")");
}
if (hostsocket == NULL)
fprintf(stderr, "%s:%d\n", ip, port);
while (count--) {
state = (state*1103515245+12345);
data[i++] = '0'+((state>>16)&63);
}
for (i = 1; i < argc; i++)
} else if (!strcmp(argv[i],"-h")) {
if (lastarg) goto invalid;
config.hostip = strdup(argv[++i]);
} else if (!strcmp(argv[i],"-p")) {
if (lastarg) goto invalid;
config.hostport = atoi(argv[++i]);
} else if (!strcmp(argv[i],"-s")) {
if (lastarg) goto invalid;
config.hostsocket = strdup(argv[++i]);
} else if (!strcmp(argv[i],"-a") ) {
if (lastarg) goto invalid;
config.auth = strdup(argv[++i]);
} else if (!strcmp(argv[i],"--user")) {
6.= 或+=这种写法加 两边必须加空格
ust = ((long)tv.tv_sec)*1000000;
ust += tv.tv_usec;
mst = ((long long)tv.tv_sec)*1000;
mst += tv.tv_usec/1000;
7.需要用到花括号的地方第一个花括号之前要有空格
static uint64_t dictSdsHash(const void *key) {
return dictGenHashFunction((unsigned char*)key, sdslen((char*)key));
}
8.|| ,&&, :,?,==这类加空格
if (ctx == NULL || ctx->err) {
fprintf(stderr,"Could not connect to Redis at ");
char *err = (ctx != NULL ? ctx->errstr : "");
if (hostsocket == NULL)
fprintf(stderr,"%s:%d: %s\n",ip,port,err);
else
fprintf(stderr,"%s: %s\n",hostsocket,err);
goto cleanup;
}
9.for循环;后面要有空格，逗号后面也必须要有空格.
for (; i < 2; i++) {
int res = redisGetReply(c, &r);
if (reply) freeReplyObject(reply);
reply = res == REDIS_OK ? ((redisReply *) r) : NULL;
if (res != REDIS_OK || !r) goto fail;
if (reply->type == REDIS_REPLY_ERROR) {
fprintf(stderr, "ERROR: %s\n", reply->str);
goto fail;
}
if (reply->type != REDIS_REPLY_ARRAY || reply->elements < 2) goto fail;
sub_reply = reply->element[1];
char *value = sub_reply->str;
if (!value) value = "";
switch (i) {
case 0: cfg->save = sdsnew(value); break;
case 1: cfg->appendonly = sdsnew(value); break;
}
fprintf(stderr, "ERROR: failed to fetch CONFIG from ");
10.if,else 能够写在一行就写在一行
if (hostsocket == NULL) fprintf(stderr, "%s:%d\n", ip, port);
else fprintf(stderr, "%s\n", hostsocket);
11.if,else写法
if (config.keepalive) {
resetClient(c);
} else {
if (config.num_threads) pthread_mutex_lock(&(config.liveclients_mutex));
config.liveclients--;
createMissingClients(c);
config.liveclients++;
if (config.num_threads)
pthread_mutex_unlock(&(config.liveclients_mutex));
freeClient(c);
}
if (config.user == NULL)
len = redisFormatCommand(&buf, "AUTH %s", config.auth);
else
len = redisFormatCommand(&buf, "AUTH %s %s",
config.user, config.auth);
if (from) {
c->obuf = sdscatlen(c->obuf,
from->obuf+from->prefixlen,
sdslen(from->obuf)-from->prefixlen);
} else {
for (j = 0; j < config.pipeline; j++)
c->obuf = sdscatlen(c->obuf,cmd,len);
12.强制类型转换，指针类型后面加空格
(char *) config.hostip,
13.case的:后面必须空格
switch(i++){
case 0: name = token; break;
case 1: addr = token; break;
case 2: flags = token; break;
case 3: master_id = token; break;
代码来源于github上的redis源码。有些地方可能总结的不是很好，需要的花，自己可以去github上参考写的好的代码是怎么写的。