{"id":11907,"date":"2022-09-28T23:53:40","date_gmt":"2022-09-28T18:23:40","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-recursive-scan-of-folder-tree-c-closed\/"},"modified":"2022-09-28T23:53:40","modified_gmt":"2022-09-28T18:23:40","slug":"solved-recursive-scan-of-folder-tree-c-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-recursive-scan-of-folder-tree-c-closed\/","title":{"rendered":"[Solved] Recursive scan of folder tree C [closed]"},"content":{"rendered":"

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\n<\/p>\n

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You could take a look at Glib, there are some file utilities<\/a> that can be helpful here.<\/p>\n

More specifically, you can use g_dir_open<\/a> function on every file in a directory. If this function sets the GError**error<\/code> pointer non-null, then you have tried to open a file, otherwise you’ve just parsed into a subdir…<\/p>\n

Your code should look like this:<\/p>\n

void parse(const gchar *path)\n{\n  GError *error;\n  GDir *dir = g_dir_open(path, 0, error);\n  if(error) \n  {\n    \/\/ this is a file, not a dir, or a dir which could not be opened...\n    \/\/ you can put all the processing for your file here.\n  }\n  else\n  {\n    gchar *elem;\n    while(( elem=g_dir_read_name(dir) ))\n    {\n      parse(elem);\n      free(elem);\n    }\n    g_dir_close(dir);\n  }\n}\n<\/code><\/pre>\n
Say that you have a folder of 10 files, then the parse function will call itself 10 times, once for each file. (Just try it in a debugger!)
0th parse call:<\/strong> opens the directory, then reaches the while loop and calls parse the 1st time for the first file
1st parse call:<\/strong> cannot open the file as directory, so the function ends in the first part of the if block.
back to the 0th parse call:<\/strong> iterates the while loop, calls parse the 2nd time for the next file
2nd parse call:<\/strong> cannot open the file as directory, so the function ends in the first part of the if block.
back to the 0th parse call:<\/strong> iterates the while loop, calls parse the 3rd time for the next file
\n…
back to the 0th parse call:<\/strong> no more files in the dir, the loop ends.<\/p>\n
This is called recursion.<\/p>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            4<\/span> <\/p><\/div>\n<\/div>\n
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solved Recursive scan of folder tree C [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] You could take a look at Glib, there are some file utilities that can be helpful here. More specifically, you can use g_dir_open function on every file in a directory. If this function sets the GError**error pointer non-null, then you have tried to open a file, otherwise you’ve just parsed into a subdir… Your … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324],"class_list":["post-11907","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c"],"yoast_head":"\n[Solved] Recursive scan of folder tree C [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-recursive-scan-of-folder-tree-c-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Recursive scan of folder tree C [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You could take a look at Glib, there are some file utilities that can be helpful here. 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