原地址:http://blog.csdn.net/foruok/article/details/17715969
在一个跨平台( Android 、Windows、Linux )项目中配置文件用 INI 格式,自己写了个解析库,纯C语言的,简单好用。
可以解析 INI 格式的字符串、解析文件、保存到文件。
下面是头文件:
- #ifndef INI_PARSER_H
- #define INI_PARSER_H
- #ifdef __cplusplus
- extern "C" {
- #endif
- struct tag_value_list;
- struct ini_parser {
- struct tag_value_list * keyvalues;
- int (*parse_file)(struct ini_parser *, const char * file);
- int (*parse_string)(struct ini_parser *, const char *text);
- char * (*value)(struct ini_parser *, const char * key);
- void (*set_value)(struct ini_parser *, const char * key, const char * value);
- void (*remove)(struct ini_parser *, const char *key);
- int (*save_to_file)(struct ini_parser *, const char * file);
- };
- struct ini_parser * new_ini_parser();
- void delete_ini_parser(struct ini_parser *);
- #ifdef __cplusplus
- }
- #endif
- #endif // INI_PARSER_H
下面是源文件:
- #include "ini_parser.h"
- #include <stdio.h>
- #include <string.h>
- #include "tag_value.h"
- static struct tag_value_pair * parse_line(char *line, int len)
- {
- struct tag_value_pair * pair = 0;
- int count = 0;
- char * p = line;
- char * end = 0;
- char * start = line;
- if(!p) return 0;
- while(*p == ‘ ‘) p++;
- /*blank line*/
- if(p - line == len ||
- *p == ‘\r‘ ||
- *p == ‘\n‘ ||
- *p == ‘\0‘) return 0;
- /*do not support group*/
- if(*p == ‘[‘) return 0;
- /*comments*/
- if(*p == ‘#‘) return 0;
- /* extract key */
- start = p;
- end = line + len;
- while(*p != ‘=‘ && p!= end) p++;
- if(p == end)
- {
- /* none ‘=‘ , invalid line */
- return 0;
- }
- end = p - 1;
- while(*end == ‘ ‘) end--; /* skip blank at the end */
- count = end - start + 1;
- pair = new_tag_value_pair();
- pair->szTag = malloc(count + 1);
- strncpy(pair->szTag, start, count);
- pair->szTag[count] = 0;
- /* extract value */
- p++;
- end = line + len; /* next pos of the last char */
- while( *p == ‘ ‘ && p != end) p++;
- if(p == end)
- {
- delete_tag_value_pair(pair);
- return 0;
- }
- start = p;
- end--; /* to the last char */
- if(*end == ‘\n‘) { *end = 0; end--; }
- if(*end == ‘\r‘) { *end = 0; end--; }
- count = end - start + 1;
- if(count > 0)
- {
- pair->szValue = malloc(count + 1);
- strncpy(pair->szValue, start, count);
- pair->szValue[count] = 0;
- }
- /* release empty key-value pair */
- if(!pair->szValue)
- {
- delete_tag_value_pair(pair);
- return 0;
- }
- return pair;
- }
- static int _parse_file(struct ini_parser * ini, const char *file){
- FILE * fp = fopen(file, "r");
- if(fp)
- {
- struct tag_value_pair * pair = 0;
- char buf[1024] = {0};
- while(fgets(buf, 1024, fp))
- {
- pair = parse_line(buf, strlen(buf));
- if(pair)
- {
- ini->keyvalues->add(ini->keyvalues, pair);
- }
- }
- fclose(fp);
- return ini->keyvalues->size;
- }
- return -1;
- }
- static int _parse_text(struct ini_parser * ini, const char * text){
- char *p = text;
- char * start = 0;
- struct tag_value_pair * pair = 0;
- if(!text) return -1;
- while(1)
- {
- start = p;
- while(*p != ‘\n‘ && *p != ‘\0‘ )p++;
- if(*p == ‘\0‘) break;
- pair = parse_line(start, p - start);
- if(pair) ini->keyvalues->add(ini->keyvalues, pair);
- p++;
- }
- return ini->keyvalues->size;
- }
- static char * _value(struct ini_parser * ini, const char * key){
- struct tag_value_pair * pair = ini->keyvalues->find_by_tag(ini->keyvalues, key);
- if(pair) return pair->szValue;
- return 0;
- }
- static void _set_value(struct ini_parser * ini, const char * key, const char *value){
- struct tag_value_pair * pair = ini->keyvalues->find_by_tag(ini->keyvalues, key);
- if(pair)
- {
- if(pair->szValue) free(pair->szValue);
- pair->szValue = strdup(value);
- }
- else
- {
- ini->keyvalues->add(ini->keyvalues, make_tag_value_pair(key, value));
- }
- }
- static void _remove(struct ini_parser * ini, const char * key){
- struct tag_value_pair * pair = ini->keyvalues->find_by_tag(ini->keyvalues, key);
- if(pair)ini->keyvalues->remove(ini->keyvalues, pair);
- }
- static void write_keyvalue(struct tag_value_pair * pair, FILE *fp)
- {
- fputs(pair->szTag, fp);
- fputc(‘=‘, fp);
- fputs(pair->szValue, fp);
- fputc(‘\n‘, fp);
- }
- static int _save_to_file(struct ini_parser * ini, const char * file){
- if(ini->keyvalues->size > 0)
- {
- FILE * fp = fopen(file, "w");
- if(fp)
- {
- struct tag_value_pair * pair = ini->keyvalues->head;
- while(pair != ini->keyvalues->tail)
- {
- write_keyvalue(pair, fp);
- pair = pair->next;
- }
- if(pair)write_keyvalue(pair, fp);
- fclose(fp);
- return 0;
- }
- }
- return -1;
- }
- struct ini_parser * new_ini_parser(){
- struct ini_parser * ini = (struct ini_parser*)malloc(sizeof(struct ini_parser));
- ini->keyvalues = new_tag_value_list();
- ini->parse_file = _parse_file;
- ini->parse_string = _parse_text;
- ini->value = _value;
- ini->set_value = _set_value;
- ini->remove = _remove;
- ini->save_to_file = _save_to_file;
- return ini;
- }
- void delete_ini_parser(struct ini_parser *ini){
- if(ini)
- {
- delete_tag_value_list(ini->keyvalues);
- free(ini);
- }
- }
测试代码:
- #include "util/ini_parser.h"
- #include "ini_test.h"
- #include <stdio.h>
- #include <assert.h>
- static char * g_szIniString = "#abc\nfirst=2\nsecond\nname=charli zhang \n";
- static void ini_parser_test_string()
- {
- struct ini_parser * ini = new_ini_parser();
- int size = ini->parse_string(ini, g_szIniString);
- assert( size > 0);
- assert( ini->value(ini, "second") == 0 );
- assert( ini->value(ini, "abc") == 0);
- assert( ini->value(ini, "name") != NULL );
- assert( ini->value(ini, "first") != NULL);
- printf("ini string: %s\n", g_szIniString);
- printf("key-value pairs count = %d\n", size);
- printf("key \‘name\‘‘, value = %s\n", ini->value(ini, "name"));
- printf("key \‘first\‘‘, value = %s\n", ini->value(ini, "first"));
- ini->set_value(ini, "baidu", "hahaha");
- ini->save_to_file(ini, "write.conf");
- ini->remove(ini, "first");
- ini->save_to_file(ini, "write2.conf");
- delete_ini_parser(ini);
- }
- static void ini_parser_test_file()
- {
- struct ini_parser * ini = new_ini_parser();
- int size = ini->parse_file(ini, "test.conf");
- assert( size > 0);
- assert( ini->value(ini, "second") == 0 );
- assert( ini->value(ini, "abc") == 0);
- assert( ini->value(ini, "name") != NULL );
- assert( ini->value(ini, "first") != NULL);
- printf("ini string: %s\n", g_szIniString);
- printf("key-value pairs count = %d\n", size);
- printf("key \‘name\‘‘, value = %s\n", ini->value(ini, "name"));
- printf("key \‘first\‘‘, value = %s\n", ini->value(ini, "first"));
- printf("key \‘baidu\‘‘, value = %s\n", ini->value(ini, "baidu"));
- delete_ini_parser(ini);
- }
- void ini_parser_test()
- {
- ini_parser_test_string();
- ini_parser_test_file();
- }
测试了解析字符串、文件、增、删、写文件,都没什么大问题。