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43 lines
1.3 KiB
Text
43 lines
1.3 KiB
Text
##! Functions to parse and manipulate UNIX style paths and directories.
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const absolute_path_pat = /(\/|[A-Za-z]:[\\\/]).*/;
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## Given an arbitrary string, extracts a single, absolute path (directory
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## with filename).
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##
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## .. todo:: Make this work on Window's style directories.
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##
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## input: a string that may contain an absolute path.
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##
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## Returns: the first absolute path found in input string, else an empty string.
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function extract_path(input: string): string
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{
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const dir_pattern = /(\/|[A-Za-z]:[\\\/])([^\"\ ]|(\\\ ))*/;
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local parts = split_string_all(input, dir_pattern);
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if ( |parts| < 3 )
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return "";
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return parts[1];
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}
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## Constructs a path to a file given a directory and a file name.
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##
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## dir: the directory in which the file lives.
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##
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## file_name: the name of the file.
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##
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## Returns: the concatenation of the directory path and file name, or just
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## the file name if it's already an absolute path.
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function build_path(dir: string, file_name: string): string
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{
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return (file_name == absolute_path_pat) ?
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file_name : cat(dir, "/", file_name);
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}
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## Returns a compressed path to a file given a directory and file name.
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## See :zeek:id:`build_path` and :zeek:id:`compress_path`.
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function build_path_compressed(dir: string, file_name: string): string
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{
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return compress_path(build_path(dir, file_name));
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}
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