2. 支持的配置文件格式如下：
#comment
var_name1 = "XXX" #comment
var_name2 = "QQQ" #comment
3. config_file.h
#include #include #include
#define MAX_PATH_LEN (512)
#define MAX_FILE_NAME_LEN (128)
/* 将配置文件中的配置项解析后存放到全局数组中 */
int parse_config_file(char *path_to_config_file);
/* 从全局数组中读取一个个配置项。例如 get_config_var("var_name1"); */ char * get_config_var(char *var_name);
4. config_file.c
#include #include #include #include #include #include #include #include #include #include
#include #include #include #include
#include "config_file.h"
#define MAX_VAR_NUM (16)
#define MAX_VAR_NAME_LEN (128)
#define MAX_VAR_VALUE_LEN (MAX_PATH_LEN)
#define COMMENT_CHARACTER '#' #define LINE_SIZE (768)
char ga_variables[MAX_VAR_NUM][MAX_VAR_NAME_LEN + 1];char ga_values[MAX_VAR_NUM][MAX_VAR_VALUE_LEN + 1];int g_var_num = 0;
void get_dir_path_of_file(char *file， char *dir_path)
{ char *temp;strncpy(dir_path， file， MAX_PATH_LEN);temp = strrchr(dir_path， '/');temp[0] = '\0';
}
void remove_trailing_chars(char *path， char c)
{ size_t len;
len = strlen(path);while (len > 0 && path[len-1] == c)
path[——len] = '\0';}
int get_key(char **line， char **key， char **value)
{ char *linepos;char *temp;
linepos = *line;if (!linepos)
{ return -1;}
/* skip whitespace */ while (isspace(linepos[0]))
linepos++;
if (linepos[0] == '\0')
{ return -1;}
/* get the key */ *key = linepos;while (1) { linepos++;if (linepos[0] == '\0')
{ return -1;} if (isspace(linepos[0]))
break;if (linepos[0] == '=')
break;}
/* terminate key */ linepos[0] = '\0';
while (1) { linepos++;if (linepos[0] == '\0')
{ return -1;} if (isspace(linepos[0]))
continue;if (linepos[0] == '=')
continue;break;}
/* get the value*/ if (linepos[0] == '"')
{ linepos++;} else { return -1;} *value = linepos;
temp = strchr(linepos， '"');if (!temp)
{ return -1;}
temp[0] = '\0';return 0;}
int parse_config_file(char *path_to_config_file)
{ char line[LINE_SIZE + 2];char *bufline;char *linepos;char *variable;char *value;char *buf;size_t bufsize;size_t cur;size_t count;int lineno;int retval = 0;
FILE *cfg_file = fopen(path_to_config_file， "r");if (NULL == cfg_file)
{ ErrSysLog("can't open '%s' as config file： %s"， path_to_config_file， strerror(errno));goto EXIT;}
/* loop through the whole file */ lineno = 0;cur = 0;while (NULL != fgets(line， sizeof(line)， cfg_file))
{ lineno++;bufline = line;count = strlen(line);
if (count > LINE_SIZE)
{ ErrSysLog("line too long， conf line skipped %s， line %d"， path_to_config_file， lineno);continue;}
/* eat the whitespace */ while ((count > 0) && isspace(bufline[0]))
{ bufline++;count——;} if (count == 0)
continue;
/* see if this is a comment */ if (bufline[0] == COMMENT_CHARACTER)
continue;
memcpy(line， bufline， count);line[count] = '\0';
linepos = line;retval = get_key(&linepos， &variable， &value);if (retval != 0)
{ ErrSysLog("error parsing %s， line %d：%d"， path_to_config_file， lineno， (int)(linepos-line));continue;}
if (g_var_num >= MAX_VAR_NUM)
{ ErrSysLog("too many vars in %s， line %d：%d"， path_to_config_file， lineno， (int)(linepos-line));continue;}
if (strlen(variable) > MAX_VAR_NAME_LEN)
{ ErrSysLog("var name to long %s， line %d：%d"， path_to_config_file， lineno， (int)(linepos-line));continue;}
if (strlen(value) > MAX_VAR_VALUE_LEN)
{ ErrSysLog("value to long %s， line %d：%d"， path_to_config_file， lineno， (int)(linepos-line));continue;}
strncpy(ga_variables[g_var_num]， variable， sizeof(ga_variables[g_var_num]));remove_trailing_chars(value， '/');strncpy(ga_values[g_var_num]， value， sizeof(ga_values[g_var_num]));g_var_num++;continue;
} EXIT：fclose(cfg_file);return g_var_num;}
char * get_config_var(char *var_name)
{ int i;for(i = 0; i < g_var_num; i++)
{ if (strcasecmp(ga_variables[i]， var_name) == 0)
{ return ga_values[i];}
} ErrSysLog("get %s failed"， var_name);return NULL;
}
void print_all_vars()
{ int i;ErrPrintf("g_var_num == %d"， g_var_num);for(i = 0; i < g_var_num; i++)
{ printf("%s = %s\n"， ga_variables[i]， ga_values[i]);
}
}
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