YAML教程

1、简介

YAML是一种人们能够轻松阅读的数据序列化格式，而且它很是适合对动态编程语言中使用的数据类型进行编码。YAML是YAML Ain't Markup Language简写，和GNU("GNU's Not Unix!")同样，YAML是一个递归着说“不”的名字。不一样的是，GNU对UNIX说不，YAML说不的对象是XML。YAML不是XML。它能够用做数据序列，配置文件，log文件，Internat信息和过滤。

参考：http://jyaml.sourceforge.net/download.html

        http://justjavac.iteye.com/blog/694498

 

 

2、安装配置

1）java：下载jar包并导入

https://repo1.maven.org/maven2/org/jyaml/jyaml/1.3/jyaml-1.3.jar

或

http://www.findmaven.net/dependency/org.jyaml/jyaml/1.3/jyaml-1.3.jar

或

http://www.java2s.com/Code/Jar/j/Downloadjyaml13dgujar.htm

 

2）c：libyaml

方式1：yum方式

yum install libyaml-devel libyaml

 

方式2：下载libyaml并编译安装

wget http://pyyaml.org/download/libyaml/yaml-0.1.5.tar.gz

tar -zxvf yaml-0.1.5.tar.gz
$ ./configure
$ make
# make install

 

3、编程实例

参考：http://pyyaml.org/wiki/LibYAML

        http://yaml.org/spec/1.1/

 

程度1：获取yaml版本信息

#include <yaml.h>

#include <stdlib.h>
#include <stdio.h>

#ifdef NDEBUG
#undef NDEBUG
#endif
#include <assert.h>

int main(void)
{
    int major = -1;
    int minor = -1;
    int patch = -1;
    char buf[64];

    yaml_get_version(&major, &minor, &patch);
    sprintf(buf, "%d.%d.%d", major, minor, patch);
    assert(strcmp(buf, yaml_get_version_string()) == 0);

    /* Print structure sizes. */
    printf("sizeof(token) = %d\n", sizeof(yaml_token_t));
    printf("sizeof(event) = %d\n", sizeof(yaml_event_t));
    printf("sizeof(parser) = %d\n", sizeof(yaml_parser_t));

    return 0;
}

编译

gcc -o example1 example1.c -lyaml

运行

 

 

程度2：

#include <yaml.h>

#include <stdlib.h>
#include <stdio.h>

#ifdef NDEBUG
#undef NDEBUG
#endif
#include <assert.h>

int main(int argc, char *argv[])
{
    int number;

    if (argc < 2) {
        printf("Usage: %s file1.yaml ...\n", argv[0]);
        return 0;
    }

    for (number = 1; number < argc; number ++)
    {
        FILE *file;
        yaml_parser_t parser;
        yaml_document_t document;
        int done = 0;
        int count = 0;
        int error = 0;

        printf("[%d] Loading '%s': ", number, argv[number]);
        fflush(stdout);

        file = fopen(argv[number], "rb");
        assert(file);

        assert(yaml_parser_initialize(&parser));

        yaml_parser_set_input_file(&parser, file);

        while (!done)
        {
            if (!yaml_parser_load(&parser, &document)) {
                error = 1;
                break;
            }

            done = (!yaml_document_get_root_node(&document));

            yaml_document_delete(&document);

            if (!done) count ++;
        }

        yaml_parser_delete(&parser);

        assert(!fclose(file));

        printf("%s (%d documents)\n", (error ? "FAILURE" : "SUCCESS"), count);
    }

    return 0;
}

编译

gcc -o example2 example2.c -lyaml

运行