#define ngx_string(str) { sizeof(str) - 1, (u_char *) str }
#define ngx_null_string { 0, NULL }
#define ngx_str_set(str, text) \
(str)->len = sizeof(text) - 1; (str)->data = (u_char *) text
#define ngx_str_null(str) (str)->len = 0; (str)->data = NULL
實(shí)例
#include <stdio.h>
#include <ngx_config.h>
#include <ngx_conf_file.h>
#include <nginx.h>
#include <ngx_core.h>
#include <ngx_string.h>
#include <ngx_palloc.h>
volatile ngx_cycle_t *ngx_cycle;
void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
const char *fmt, ...)
{
}
int
main(int argc, char *argv[])
{
ngx_str_t t1 = ngx_string("bei jing");
ngx_str_t t2 = ngx_null_string;
printf("t1:\n");
printf("t1.len = %lu\n", t1.len);
printf("t1.data = %s\n\n", t1.data);
printf("t2:\n");
printf("t2.len = %lu\n", t2.len);
printf("t3.data = %s\n\n\n", t2.data);
ngx_str_null(&t1);
ngx_str_set(&t2, "shang hai");
printf("t1:\n");
printf("t1.len = %lu\n", t1.len);
printf("t1.data = %s\n\n", t1.data);
printf("t2:\n");
printf("t2.len = %lu\n", t2.len);
printf("t3.data = %s\n", t2.data);
return 0;
}
執(zhí)行：
gcc -c -O -pipe -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Wunused-function -Wunused-variable -Wunused-value -Werror -g
-I ../../objs/
-I ../os/unix/
-I../core/
-I /usr/local/opt/pcre/include/
-I../event/
-I../os/
./j_str.c -o ./j_str.o
gcc -o ./j_str ./j_str.o
../../objs/src/core/ngx_string.o
../../objs/src/os/unix/ngx_alloc.o
../../objs/src/core/ngx_palloc.o
結(jié)果：
t1:
t1.len = 8
t1.data = bei jing
t2:
t2.len = 0
t3.data = (null)
t1:
t1.len = 0
t1.data = (null)
t2:
t2.len = 9
t3.data = shang hai
