[1] | 1 | #ifndef __cmt_awk_h__ |
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| 2 | #define __cmt_awk_h__ |
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| 3 | |
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| 4 | #include "cmt_std.h" |
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| 5 | #include "cmt_string.h" |
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| 6 | #include "cmt_regexp.h" |
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| 7 | |
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| 8 | //------------------------------------------------ |
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| 9 | // |
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| 10 | // Emulation of the awk program. |
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| 11 | // |
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| 12 | // The run method reads the specified file, and applies the |
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| 13 | // <filter> virtual method onto each selected line. It returns |
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| 14 | // a condition (see below) |
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| 15 | // |
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| 16 | // o empty lines are ignored |
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| 17 | // o when the optional pattern is specified, only lines matching it |
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| 18 | // are considered. |
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| 19 | // |
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| 20 | // The virtual <begin> method is applied before any filter |
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| 21 | // The virtual <filter> method is applied onto each line |
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| 22 | // The virtual <end> method is applied after all filters |
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| 23 | // |
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| 24 | // The condition (one of "ok", "stopped" or "failed") will be |
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| 25 | // generated if : |
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| 26 | // o everything run well (ok) |
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| 27 | // o the <stop> method is called (stopped) |
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| 28 | // o an error occurred or the <abort> method is called (failed) |
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| 29 | // |
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| 30 | // State variables are maintained for derived awk filters |
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| 31 | // |
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| 32 | // m_line_number the current line number (empty lines |
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| 33 | // are counted) |
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| 34 | // |
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| 35 | // m_continuation_allowed when true, take into account the |
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| 36 | // trailing backslashes, so as to |
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| 37 | // first accumulate continued lines |
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| 38 | // into one |
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| 39 | // |
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| 40 | // Derived classes: |
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| 41 | // ---------------- |
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| 42 | // |
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| 43 | // FAwk : scans a file |
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| 44 | // |
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| 45 | // State variables: |
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| 46 | // |
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| 47 | // m_dir_name the path of the currently read file |
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| 48 | // m_file_name the name of the currently read file |
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| 49 | // |
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| 50 | // PAwk : execute a command and scans its output |
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| 51 | // |
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| 52 | //------------------------------------------------ |
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| 53 | class Awk |
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| 54 | { |
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| 55 | public: |
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| 56 | typedef enum {ok, stopped, failed} condition; |
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| 57 | Awk (); |
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| 58 | virtual ~Awk (); |
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| 59 | condition run (const cmt_string& text, const cmt_string& pattern = ""); |
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| 60 | condition run (const cmt_string& text, const cmt_regexp& expression); |
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| 61 | void stop (); |
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| 62 | void abort (); |
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| 63 | void allow_continuation (); |
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| 64 | condition get_last_condition () const; |
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| 65 | |
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| 66 | virtual void begin (); |
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| 67 | virtual void filter (const cmt_string& line); |
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| 68 | virtual void end (); |
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| 69 | |
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| 70 | void inc_line_number (); |
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| 71 | |
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| 72 | protected: |
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| 73 | int m_line_number; |
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| 74 | condition m_condition; |
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| 75 | bool m_continuation_allowed; |
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| 76 | }; |
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| 77 | |
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| 78 | class FAwk : public Awk |
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| 79 | { |
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| 80 | public: |
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| 81 | condition run (const cmt_string& file_name, const cmt_string& pattern = ""); |
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| 82 | condition run (const cmt_string& text, const cmt_regexp& expression); |
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| 83 | protected: |
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| 84 | cmt_string m_dir_name; |
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| 85 | cmt_string m_file_name; |
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| 86 | }; |
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| 87 | |
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| 88 | class PAwk : public Awk |
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| 89 | { |
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| 90 | public: |
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| 91 | condition run (const cmt_string& command, const cmt_string& pattern = ""); |
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| 92 | condition run (const cmt_string& text, const cmt_regexp& expression); |
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| 93 | }; |
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| 94 | |
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| 95 | #endif |
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