ydict - 自制的一个小工具

lpw

ydict，自制的一个小工具，分享一下。
有 Bug 请报一下。
帮忙改进一下更好。

编程水平不高，调用了几个 Linux 的程序...
本来想用 Google 的字典，但不能用 wget 下载，所以用了 Yahoo 的...

ydict.c

2. /* ydict - Yahoo Dictionary
3. * Use wget to get the web page from yahoo and display to terminal
4. */
6. #include <stdio.h>
7. #include <stdlib.h>
8. #include <string.h>
9. #include <pwd.h>
10. #include <unistd.h>
12. #define VERSION "0.02"
14. char path[100];  /* the path to save .ydict.tmp */
15. FILE *sfp;  /* the file pointer of function - print_speech */
17. void
18. big52utf8 (void)  /* change charset */
19. {
20.   system ("iconv ~/.ydict-big5.tmp -f big5 -t gb2312 | iconv -f gb2312 -t utf8 -o ~/.ydict.tmp");
21. }
23. void
24. print_speech (void)  /* the function to print speech */
25. {
26.   char ch;
27.   char print = 0;
28.   char *speech = "<div class=pcixin>";  /* keyword of speech */
29.   char *speech0 = speech;  /* start point of speech */
31.   if (sfp == NULL)  /* set the file open if not set */
32.     sfp = fopen (path, "r");
33.   while ((ch = getc (sfp)) != EOF)
34.     {
35.       if (print == 0)  /* 0 = check only, not output  */
36.         if (ch == *speech)
37.           {
38.             ++speech;
39.             if (*speech == '\0')
40.               {
41.                 speech = speech0;
42.                 print = 1;
43.               }
44.           }
45.         else
46.           speech = speech0;
47.       else  /* print = 1, output something  */
48.         if (ch != '<')
49.           printf ("%c", ch);
50.         else
51.           {
52.             printf ("\n");
53.             print = 0;
54.             return;
55.           }
56.     }
57.   fclose (sfp);
58. }
60. char
61. print_explain (void)  /* the function to print explain */
62. {
63.   FILE *fp;
64.   char ch;
65.   char *explain = "<div class=pexplain>";  /* keyword of explain */
66.   char *explain0 = explain;  /* start point of explain */
67.   char *nspeech = "<div class=pcixin>";  /* keyword of next speech */
68.   char *nspeech0 = nspeech;  /* start point of next speech */
69.   char print = 0;
70.   char chkexplain = 0;  /* 1 = check explain */
71.   char findit = 0;  /* 0 = can not find the word */
73.   fp = fopen (path, "r");
74.   while ((ch = getc (fp)) != EOF)        /* read the file */
75.     {
76.       if (print == 0)  /* 0 = check, no output  */
77.         if (ch == *nspeech)
78.           {
79.             ++ nspeech;
80.             if (*nspeech == '\0')
81.               {
82.                 nspeech = nspeech0;
83.                 print_speech();  /* call function to print speech */
84.               }
85.             else
86.               chkexplain = 1;
87.           }
88.         else
89.           {
90.             nspeech = nspeech0;
91.             chkexplain = 1;
92.           }
93.       else  /*print = 1, output something*/
94.         if (ch != '<')
95.           printf ("%c", ch);
96.         else
97.           {
98.             printf ("\n");
99.             print = 0;
100.             findit = 1;  /* 1 = found the word */
101.           }
103.       if (chkexplain == 1)  /* 1 = print explain of the word */
104.         {
105.           chkexplain = 0;
106.           if (ch == *explain)
107.             {
108.               ++ explain;
109.               if (*explain == '\0')
110.                 {
111.                   explain = explain0;
112.                   print = 1;
113.                 }
114.             }
115.           else
116.             explain = explain0;
117.         }
118.     }
119.   fclose (fp);
120.   return findit;
121. }
123. void
124. set_home (void)
125. {
126.   uid_t uid;
127.   struct passwd *info;
128.   uid = getuid ();
129.   info = getpwuid (uid);
130.   strcpy (path, info->pw_dir);
132.   strcat (path, "/.ydict.tmp");
133. }
135. void
136. remove_tmp (void)
137. {
138.   system ("rm ~/.ydict.tmp ~/.ydict-big5.tmp");
139. }
141. void
142. get (char *word)
143. {
144.   char cmd[250];
145.   strcpy (cmd, "wget --post-data="s=");
146.   strcat (cmd, word);
147.   strcat (cmd,
148.           "" http://hk.dictionary.yahoo.com/search.html -4q -O ~/.ydict-big5.tmp");
149.   system (cmd);
150. }
152. void
153. print_help (void)
154. {
155.   printf("Usage: ydict [WORD]\n");
156.   printf("Example: ydict apple\n");
157. }
159. int
160. main (int argc, char *argv[])
161. {
162.   printf ("ydict %s\n", VERSION);
163.   if (argc < 2)
164.     {
165.       printf ("No input\n");
166.       print_help ();
167.       exit (EXIT_FAILURE);
168.     }
169.   if ((strcmp(argv[1], "--help")) == 0)
170.     {
171.       print_help ();
172.       exit (EXIT_FAILURE);
173.     }
174.   set_home ();
175.   printf ("Receiving information from network...\n\n");
176.   get (argv[1]);
177.   big52utf8 ();
178.   if (print_explain () == 0)
179.     printf ("Could not find the word.\n");
180.   remove_tmp ();
181. }

复制代码

用gcc编绎一下

2. gcc ydict.c
3. ./a.out

复制代码

jhuangjiahua

如果需要那么多 system() 的话，不如看看 shell script

#/bin/sh
wget -q -O- --post-data="s=$*" http://hk.dictionary.yahoo.com/search.html   |  iconv  -f big5 -t gb2312 | iconv -f gb2312 -t utf8  |  grep  'div class=pexplain' | sed -e :a -e 's/<[^>]*>//g;/</N;//ba ' -e 's/&nbsp\;//'

你的 C 每一次 system() 都是用外部 shell 执行的。

或者，把那些外部程序用 getopt、 iconv、 http 库替换

realtang

楼主的努力的态度让我非常欣赏.
只是从方法来讲,还是用bash的好。