用C讀取INI配置文件

在Windows下可以用GetPrivateProfileString或GetPrivateProfileInt方便讀取.ini配置文件內容，但是在Linux平台上就一籌莫展了。為了解決該問題，打算用C來讀取.ini，即可不受平台的限制了。

1. #define CONF_FILE_PATH "Config.ini"
3. #include <string.h>
5. #ifdef WIN32
6. #include <Windows.h>
7. #include <stdio.h>
8. #else
10. #define MAX_PATH 260
12. #include <unistd.h>
13. #include <fcntl.h>
14. #include <stdio.h>
15. #include <stdlib.h>
16. #include <stdarg.h>
17. #endif
19. char g_szConfigPath[MAX_PATH];
21. //獲取當前程序目錄
22. int GetCurrentPath(char buf[],char *pFileName)
23. {
24. #ifdef WIN32
25. GetModuleFileName(NULL,buf,MAX_PATH);
26. #else
27. char pidfile[64];
28. int bytes;
29. int fd;
31. sprintf(pidfile, "/proc/%d/cmdline", getpid());
33. fd = open(pidfile, O_RDONLY, 0);
34. bytes = read(fd, buf, 256);
35. close(fd);
36. buf[MAX_PATH] = '\0';
38. #endif
39. char * p = &buf[strlen(buf)];
40. do
41. {
42. *p = '\0';
43. p--;
44. #ifdef WIN32
45. } while( '\\' != *p );
46. #else
47. } while( '/' != *p );
48. #endif
50. p++;
52. //配置文件目錄
53. memcpy(p,pFileName,strlen(pFileName));
54. return 0;
55. }
57. //從INI文件讀取字符串類型數據
58. char *GetIniKeyString(char *title,char *key,char *filename)
59. {
60. FILE *fp;
61. char szLine[1024];
62. static char tmpstr[1024];
63. int rtnval;
64. int i = 0;
65. int flag = 0;
66. char *tmp;
68. if((fp = fopen(filename, "r")) == NULL)
69. {
70. printf("have no such file \n");
71. return "";
72. }
73. while(!feof(fp))
74. {
75. rtnval = fgetc(fp);
76. if(rtnval == EOF)
77. {
78. break;
79. }
80. else
81. {
82. szLine[i++] = rtnval;
83. }
84. if(rtnval == '\n')
85. {
86. #ifndef WIN32
87. i--;
88. #endif
89. szLine[--i] = '\0';
90. i = 0;
91. tmp = strchr(szLine, '=');
93. if(( tmp != NULL )&&(flag == 1))
94. {
95. if(strstr(szLine,key)!=NULL)
96. {
97. //注釋行
98. if ('#' == szLine[0])
99. {
100. }
101. else if ( '\/' == szLine[0] && '\/' == szLine[1] )
102. {
104. }
105. else
106. {
107. //找打key對應變量
108. strcpy(tmpstr,tmp+1);
109. fclose(fp);
110. return tmpstr;
111. }
112. }
113. }
114. else
115. {
116. strcpy(tmpstr,"[");
117. strcat(tmpstr,title);
118. strcat(tmpstr,"]");
119. if( strncmp(tmpstr,szLine,strlen(tmpstr)) == 0 )
120. {
121. //找到title
122. flag = 1;
123. }
124. }
125. }
126. }
127. fclose(fp);
128. return "";
129. }
131. //從INI文件讀取整類型數據
132. int GetIniKeyInt(char *title,char *key,char *filename)
133. {
134. return atoi(GetIniKeyString(title,key,filename));
135. }
137. int main(int argc, char* argv[])
138. {
139. char buf[MAX_PATH];
140. memset(buf,0,sizeof(buf));
141. GetCurrentPath(buf,CONF_FILE_PATH);
142. strcpy(g_szConfigPath,buf);
144. int iCatAge;
145. char szCatName[32];
147. iCatAge = GetIniKeyInt("CAT","age",g_szConfigPath);
148. strcpy(szCatName,GetIniKeyString("CAT","name",g_szConfigPath));
150. return 0;
151. }

下邊是配置文件：

[CAT]

age=2

name=Tom