| 1 | ;;+----------------------------------------------------------------------------- |
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| 2 | ;;+ Isidorus |
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| 3 | ;;+ (c) 2008-2010 Marc Kuester, Christoph Ludwig, Lukas Georgieff |
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| 4 | ;;+ |
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| 5 | ;;+ Isidorus is freely distributable under the LLGPL license. |
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| 6 | ;;+ You can find a detailed description in trunk/docs/LLGPL-LICENSE.txt and |
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| 7 | ;;+ trunk/docs/LGPL-LICENSE.txt. |
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| 8 | ;;+----------------------------------------------------------------------------- |
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| 9 | |
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| 10 | (defpackage :base-tools |
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| 11 | (:use :cl) |
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| 12 | (:nicknames :tools) |
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| 13 | (:export :push-string |
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| 14 | :concat |
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| 15 | :when-do |
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| 16 | :string-replace |
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| 17 | :remove-null |
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| 18 | :full-path |
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| 19 | :trim-whitespace-left |
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| 20 | :trim-whitespace-right |
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| 21 | :trim-whitespace |
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| 22 | :string-starts-with |
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| 23 | :string-ends-with |
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| 24 | :string-ends-with-one-of |
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| 25 | :string-starts-with-char |
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| 26 | :string-starts-with-one-of |
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| 27 | :string-until |
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| 28 | :string-after |
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| 29 | :search-first |
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| 30 | :search-first-ignore-literals |
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| 31 | :concatenate-uri |
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| 32 | :absolute-uri-p |
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| 33 | :string-starts-with-digit |
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| 34 | :string-after-number |
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| 35 | :separate-leading-digits |
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| 36 | :white-space |
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| 37 | :white-space-p |
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| 38 | :escape-string |
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| 39 | :search-first-unclosed-paranthesis |
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| 40 | :search-first-unopened-paranthesis |
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| 41 | :in-literal-string-p |
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| 42 | :find-literal-end |
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| 43 | :get-literal-quotation |
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| 44 | :get-literal |
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| 45 | :return-if-starts-with)) |
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| 46 | |
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| 47 | (in-package :base-tools) |
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| 48 | |
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| 49 | |
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| 50 | (defparameter *white-space* |
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| 51 | (list #\Space #\Tab #\Newline (code-char 13)) |
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| 52 | "Contains all characters that are treated as white space.") |
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| 53 | |
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| 54 | |
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| 55 | (defun white-space() |
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| 56 | "Returns a lit os string that represents a white space." |
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| 57 | (map 'list #'(lambda(char) |
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| 58 | (string char)) |
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| 59 | *white-space*)) |
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| 60 | |
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| 61 | |
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| 62 | (defmacro concat (&rest strings) |
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| 63 | `(concatenate 'string ,@strings)) |
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| 64 | |
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| 65 | |
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| 66 | (defmacro push-string (obj place) |
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| 67 | "Imitates the push macro but instead of pushing object in a list, |
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| 68 | there will be appended the given string to the main string object." |
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| 69 | `(setf ,place (concat ,place ,obj))) |
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| 70 | |
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| 71 | |
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| 72 | (defmacro when-do (result-bounding condition-statement do-with-result) |
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| 73 | "Executes the first statement and stores its result in the variable result. |
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| 74 | If result isn't nil the second statement is called. |
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| 75 | The second statement can use the variable tools:result as a parameter." |
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| 76 | `(let ((,result-bounding ,condition-statement)) |
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| 77 | (if ,result-bounding |
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| 78 | ,do-with-result |
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| 79 | nil))) |
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| 80 | |
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| 81 | |
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| 82 | (defun white-space-p (str) |
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| 83 | "Returns t if the passed str contains only white space characters." |
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| 84 | (cond ((and (= (length str) 1) |
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| 85 | (string-starts-with-one-of str (white-space))) |
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| 86 | t) |
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| 87 | ((string-starts-with-one-of str (white-space)) |
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| 88 | (white-space-p (subseq str 1))) |
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| 89 | (t |
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| 90 | nil))) |
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| 91 | |
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| 92 | |
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| 93 | (defun remove-null (lst) |
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| 94 | "Removes all null values from the passed list." |
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| 95 | (remove-if #'null lst)) |
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| 96 | |
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| 97 | |
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| 98 | (defun full-path (pathname) |
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| 99 | "Returns a string that represents the full path of the passed |
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| 100 | CL:Pathname construct." |
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| 101 | (declare (CL:Pathname pathname)) |
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| 102 | (let ((segments |
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| 103 | (remove-if #'null |
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| 104 | (map 'list #'(lambda(item) |
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| 105 | (when (stringp item) |
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| 106 | (concat "/" item))) |
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| 107 | (pathname-directory pathname)))) |
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| 108 | (full-path-string "")) |
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| 109 | (dolist (segment segments) |
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| 110 | (push-string segment full-path-string)) |
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| 111 | (concat full-path-string "/" (pathname-name pathname)))) |
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| 112 | |
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| 113 | |
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| 114 | (defun trim-whitespace-left (value) |
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| 115 | "Uses string-left-trim with a predefined character-list." |
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| 116 | (declare (String value)) |
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| 117 | (string-left-trim *white-space* value)) |
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| 118 | |
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| 119 | |
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| 120 | (defun trim-whitespace-right (value) |
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| 121 | "Uses string-right-trim with a predefined character-list." |
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| 122 | (declare (String value)) |
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| 123 | (string-right-trim *white-space* value)) |
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| 124 | |
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| 125 | |
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| 126 | (defun trim-whitespace (value) |
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| 127 | "Uses string-trim with a predefined character-list." |
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| 128 | (declare (String value)) |
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| 129 | (string-trim *white-space* value)) |
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| 130 | |
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| 131 | |
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| 132 | (defun string-starts-with (str prefix &key (ignore-case nil)) |
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| 133 | "Checks if string str starts with a given prefix." |
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| 134 | (declare (String str prefix) |
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| 135 | (Boolean ignore-case)) |
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| 136 | (let ((str-i (if ignore-case |
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| 137 | (string-downcase str :start 0 :end (min (length str) |
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| 138 | (length prefix))) |
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| 139 | str)) |
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| 140 | (prefix-i (if ignore-case |
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| 141 | (string-downcase prefix) |
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| 142 | prefix))) |
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| 143 | (string= str-i prefix-i :start1 0 :end1 |
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| 144 | (min (length prefix-i) |
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| 145 | (length str-i))))) |
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| 146 | |
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| 147 | |
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| 148 | (defun string-starts-with-one-of (str prefixes &key (ignore-case nil)) |
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| 149 | "Returns t if str ends with one of the string contained in suffixes." |
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| 150 | (declare (String str) |
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| 151 | (List prefixes) |
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| 152 | (Boolean ignore-case)) |
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| 153 | (loop for prefix in prefixes |
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| 154 | when (string-starts-with str prefix :ignore-case ignore-case) |
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| 155 | return t)) |
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| 156 | |
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| 157 | |
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| 158 | (defun string-ends-with (str suffix &key (ignore-case nil)) |
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| 159 | "Checks if string str ends with a given suffix." |
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| 160 | (declare (String str suffix) |
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| 161 | (Boolean ignore-case)) |
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| 162 | (let ((str-i (if ignore-case |
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| 163 | (string-downcase str :start (max (- (length str) |
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| 164 | (length suffix)) |
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| 165 | 0) |
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| 166 | :end (length str)) |
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| 167 | str)) |
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| 168 | (suffix-i (if ignore-case |
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| 169 | (string-downcase suffix) |
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| 170 | suffix))) |
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| 171 | (string= str-i suffix-i :start1 (max (- (length str) |
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| 172 | (length suffix)) |
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| 173 | 0)))) |
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| 174 | |
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| 175 | |
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| 176 | (defun string-ends-with-one-of (str suffixes &key (ignore-case nil)) |
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| 177 | "Returns t if str ends with one of the string contained in suffixes." |
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| 178 | (declare (String str) |
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| 179 | (List suffixes) |
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| 180 | (Boolean ignore-case)) |
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| 181 | (loop for suffix in suffixes |
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| 182 | when (string-ends-with str suffix :ignore-case ignore-case) |
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| 183 | return t)) |
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| 184 | |
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| 185 | |
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| 186 | (defun string-replace (main-string string-to-replace new-string) |
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| 187 | "Replaces every occurrence of string-to-replace by new-string |
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| 188 | in main-string." |
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| 189 | (declare (String main-string string-to-replace new-string)) |
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| 190 | (if (string= string-to-replace new-string) |
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| 191 | main-string |
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| 192 | (let ((search-idx (search-first (list string-to-replace) main-string))) |
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| 193 | (if (not search-idx) |
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| 194 | main-string |
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| 195 | (let ((modified-string |
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| 196 | (concat (subseq main-string 0 search-idx) |
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| 197 | new-string |
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| 198 | (subseq main-string |
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| 199 | (+ search-idx (length string-to-replace)))))) |
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| 200 | (string-replace modified-string string-to-replace new-string)))))) |
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| 201 | |
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| 202 | |
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| 203 | |
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| 204 | (defun string-starts-with-digit (str) |
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| 205 | "Checks whether the passed string starts with a digit." |
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| 206 | (declare (String str)) |
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| 207 | (loop for item in (list 0 1 2 3 4 5 6 7 8 9) |
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| 208 | when (string-starts-with str (write-to-string item)) |
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| 209 | return t)) |
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| 210 | |
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| 211 | |
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| 212 | (defun string-after-number (str) |
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| 213 | "If str starts with a digit, there is returned the first |
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| 214 | substring after a character that is a non-digit. |
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| 215 | If str does not start with a digit str is returned." |
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| 216 | (declare (String str)) |
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| 217 | (if (and (string-starts-with-digit str) |
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| 218 | (> (length str) 0)) |
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| 219 | (string-after-number (subseq str 1)) |
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| 220 | str)) |
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| 221 | |
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| 222 | |
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| 223 | (defun separate-leading-digits (str &optional digits) |
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| 224 | "If str starts with a number the number is returned." |
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| 225 | (declare (String str) |
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| 226 | (type (or Null String) digits)) |
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| 227 | (if (string-starts-with-digit str) |
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| 228 | (separate-leading-digits |
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| 229 | (subseq str 1) (concat digits (subseq str 0 1))) |
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| 230 | digits)) |
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| 231 | |
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| 232 | |
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| 233 | (defun string-starts-with-char (begin str) |
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| 234 | (equal (char str 0) begin)) |
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| 235 | |
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| 236 | |
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| 237 | (defun string-until (str anchor) |
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| 238 | "Returns a substring until the position of the passed anchor." |
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| 239 | (declare (String str anchor)) |
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| 240 | (let ((pos (search anchor str))) |
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| 241 | (if pos |
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| 242 | (subseq str 0 pos) |
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| 243 | str))) |
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| 244 | |
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| 245 | |
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| 246 | (defun string-after (str prefix) |
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| 247 | "Returns the substring after the found prefix. |
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| 248 | If there is no substring equal to prefix nil is returned." |
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| 249 | (declare (String str prefix)) |
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| 250 | (let ((pos (search prefix str))) |
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| 251 | (if pos |
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| 252 | (subseq str (+ pos (length prefix))) |
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| 253 | nil))) |
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| 254 | |
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| 255 | |
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| 256 | (defun search-first (search-strings main-string &key from-end) |
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| 257 | "Returns the position of one of the search-strings. The returned position |
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| 258 | is the one closest to 0. If no search-string is found, nil is returned." |
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| 259 | (declare (String main-string) |
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| 260 | (List search-strings)) |
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| 261 | (let ((positions |
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| 262 | (remove-null |
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| 263 | (map 'list #'(lambda(search-str) |
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| 264 | (search search-str main-string :from-end from-end)) |
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| 265 | search-strings)))) |
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| 266 | (let ((sorted-positions (if from-end |
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| 267 | (sort positions #'>) |
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| 268 | (sort positions #'<)))) |
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| 269 | (when sorted-positions |
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| 270 | (first sorted-positions))))) |
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| 271 | |
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| 272 | |
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| 273 | (defun find-literal-end (query-string delimiter &optional (overall-pos 0)) |
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| 274 | "Returns the end of the literal corresponding to the passed delimiter |
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| 275 | string. The query-string must start after the opening literal delimiter. |
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| 276 | The return value is an int that represents the start index of closing |
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| 277 | delimiter. delimiter must be either \", ', or '''. |
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| 278 | If the returns value is nil, there is no closing delimiter." |
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| 279 | (declare (String query-string delimiter) |
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| 280 | (Integer overall-pos)) |
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| 281 | (let ((current-pos (search delimiter query-string))) |
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| 282 | (if current-pos |
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| 283 | (if (string-ends-with (subseq query-string 0 current-pos) "\\") |
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| 284 | (find-literal-end (subseq query-string (+ current-pos |
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| 285 | (length delimiter))) |
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| 286 | delimiter (+ overall-pos current-pos 1)) |
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| 287 | (+ overall-pos current-pos (length delimiter))) |
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| 288 | nil))) |
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| 289 | |
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| 290 | |
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| 291 | (defun get-literal-quotation (str) |
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| 292 | "Returns ', ''', \" or \"\"\" when the string starts with a literal delimiter." |
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| 293 | (cond ((string-starts-with str "'''") |
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| 294 | "'") |
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| 295 | ((string-starts-with str "\"\"\"") |
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| 296 | "\"\"\"") |
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| 297 | ((string-starts-with str "'") |
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| 298 | "'") |
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| 299 | ((string-starts-with str "\"") |
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| 300 | "\""))) |
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| 301 | |
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| 302 | |
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| 303 | (defun get-literal (query-string &key (quotation nil)) |
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| 304 | "Returns a list of the form (:next-string <string> :literal <string> |
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| 305 | where next-query is the query after the found literal and literal |
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| 306 | is the literal string." |
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| 307 | (declare (String query-string) |
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| 308 | (type (or Null String) quotation)) |
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| 309 | (let ((local-quotation quotation)) |
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| 310 | (cond ((or (string-starts-with query-string "\"\"\"") |
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| 311 | (string-starts-with query-string "'''")) |
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| 312 | (unless local-quotation |
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| 313 | (setf local-quotation (subseq query-string 0 3))) |
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| 314 | (let ((literal-end |
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| 315 | (find-literal-end (subseq query-string 3) (subseq query-string 0 3)))) |
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| 316 | (when literal-end |
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| 317 | (list :next-string (subseq query-string (+ 3 literal-end)) |
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| 318 | :literal (concat quotation |
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| 319 | (subseq query-string 3 literal-end) |
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| 320 | quotation))))) |
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| 321 | ((or (string-starts-with query-string "\"") |
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| 322 | (string-starts-with query-string "'")) |
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| 323 | (unless local-quotation |
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| 324 | (setf local-quotation (subseq query-string 0 1))) |
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| 325 | (let ((literal-end |
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| 326 | (find-literal-end (subseq query-string 1) |
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| 327 | (subseq query-string 0 1)))) |
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| 328 | (when literal-end |
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| 329 | (let ((literal |
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| 330 | (escape-string (subseq query-string 1 literal-end) "\""))) |
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| 331 | (list :next-string (subseq query-string (+ 1 literal-end)) |
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| 332 | :literal (concat local-quotation literal |
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| 333 | local-quotation))))))))) |
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| 334 | |
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| 335 | |
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| 336 | (defun search-first-ignore-literals (search-strings main-string &key from-end) |
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| 337 | (declare (String main-string) |
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| 338 | (List search-strings) |
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| 339 | (Boolean from-end)) |
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| 340 | (let ((first-pos |
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| 341 | (search-first search-strings main-string :from-end from-end))) |
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| 342 | (when first-pos |
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| 343 | (if (not (in-literal-string-p main-string first-pos)) |
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| 344 | first-pos |
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| 345 | (let* ((literal-start |
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| 346 | (search-first (list "\"" "'") (subseq main-string 0 first-pos) |
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| 347 | :from-end from-end)) |
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| 348 | (next-str |
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| 349 | (if from-end |
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| 350 | |
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| 351 | |
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| 352 | (subseq main-string 0 literal-start) |
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| 353 | |
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| 354 | |
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| 355 | (let* ((sub-str (subseq main-string literal-start)) |
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| 356 | (literal-result (get-literal sub-str))) |
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| 357 | (getf literal-result :next-string))))) |
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| 358 | (let ((next-pos |
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| 359 | (search-first-ignore-literals search-strings next-str |
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| 360 | :from-end from-end))) |
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| 361 | (when next-pos |
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| 362 | (+ (- (length main-string) (length next-str)) next-pos)))))))) |
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| 363 | |
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| 364 | |
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| 365 | (defun concatenate-uri (absolute-ns value) |
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| 366 | "Returns a string conctenated of the absolut namespace an the given value |
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| 367 | separated by either '#' or '/'." |
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| 368 | (declare (string absolute-ns value)) |
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| 369 | (unless (and (> (length absolute-ns) 0) |
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| 370 | (> (length value) 0)) |
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| 371 | (error "From concatenate-uri(): absolute-ns and value must be of length > 0")) |
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| 372 | (unless (absolute-uri-p absolute-ns) |
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| 373 | (error "From concatenate-uri(): absolute-ns has to be an absolute URI: ~a" absolute-ns)) |
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| 374 | (let ((last-char |
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| 375 | (elt absolute-ns (- (length absolute-ns) 1))) |
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| 376 | (first-char |
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| 377 | (elt value 0))) |
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| 378 | (let ((separator |
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| 379 | (cond |
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| 380 | ((or (eql first-char #\#) |
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| 381 | (eql first-char #\/)) |
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| 382 | "") |
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| 383 | ((or (eql last-char #\#) |
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| 384 | (eql last-char #\/)) |
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| 385 | "") |
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| 386 | (t |
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| 387 | "/")))) |
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| 388 | (let ((prep-ns |
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| 389 | (if (and (eql last-char first-char) |
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| 390 | (or (eql last-char #\#) |
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| 391 | (eql last-char #\/))) |
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| 392 | (subseq absolute-ns 0 (- (length absolute-ns) 1)) |
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| 393 | (if (and (eql last-char #\#) |
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| 394 | (find #\/ value)) |
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| 395 | (progn |
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| 396 | (when (not (eql first-char #\/)) |
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| 397 | (setf separator "/")) |
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| 398 | (subseq absolute-ns 0 (- (length absolute-ns) 1))) |
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| 399 | absolute-ns)))) |
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| 400 | (concat prep-ns separator value))))) |
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| 401 | |
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| 402 | |
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| 403 | (defun absolute-uri-p (uri) |
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| 404 | "Returns t if the passed uri is an absolute one. This |
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| 405 | is indicated by a ':' with no leadgin '/'." |
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| 406 | (when uri |
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| 407 | (let ((position-of-colon |
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| 408 | (position #\: uri))) |
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| 409 | (declare (string uri)) |
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| 410 | (and position-of-colon (> position-of-colon 0) |
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| 411 | (not (find #\/ (subseq uri 0 position-of-colon))))))) |
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| 412 | |
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| 413 | |
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| 414 | (defun escape-string (str char-to-escape) |
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| 415 | "Escapes every occurrence of char-to-escape in str, if it is |
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| 416 | not escaped." |
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| 417 | (declare (String str char-to-escape)) |
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| 418 | (let ((result "")) |
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| 419 | (dotimes (idx (length str)) |
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| 420 | (let ((current-char (subseq str idx (1+ idx))) |
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| 421 | (previous-char (if (= idx 0) "" (subseq str (1- idx) idx)))) |
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| 422 | (cond ((and (string= current-char char-to-escape) |
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| 423 | (string/= previous-char "\\")) |
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| 424 | (push-string "\\" result) |
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| 425 | (push-string current-char result)) |
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| 426 | (t |
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| 427 | (push-string current-char result))))) |
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| 428 | result)) |
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| 429 | |
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| 430 | |
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| 431 | (defun in-literal-string-p(filter-string pos) |
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| 432 | "Returns t if the passed pos is within a literal string value." |
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| 433 | (declare (String filter-string) |
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| 434 | (Integer pos)) |
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| 435 | (let ((result nil)) |
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| 436 | (dotimes (idx (length filter-string) result) |
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| 437 | (let ((current-char (subseq filter-string idx (1+ idx)))) |
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| 438 | (cond ((or (string= current-char "'") |
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| 439 | (string= current-char "\"")) |
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| 440 | (let* ((l-result (get-literal (subseq filter-string idx))) |
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| 441 | (next-idx |
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| 442 | (when l-result |
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| 443 | (- (length filter-string) |
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| 444 | (length (getf l-result :next-string)))))) |
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| 445 | (when (and next-idx (< pos next-idx)) |
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| 446 | (setf result t) |
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| 447 | (setf idx (length filter-string))) |
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| 448 | (when (<= pos idx) |
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| 449 | (setf idx (length filter-string))))) |
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| 450 | (t |
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| 451 | (when (<= pos idx) |
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| 452 | (setf idx (length filter-string))))))))) |
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| 453 | |
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| 454 | |
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| 455 | (defun search-first-unclosed-paranthesis (str &key ignore-literals) |
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| 456 | "Returns the idx of the first ( that is not closed, the search is |
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| 457 | started from the end of the string. |
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| 458 | If ignore-literals is set to t all paranthesis that are within |
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| 459 | \", \"\"\", ' and ''' are ignored." |
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| 460 | (declare (String str) |
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| 461 | (Boolean ignore-literals)) |
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| 462 | (let ((open-brackets 0) |
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| 463 | (result-idx nil)) |
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| 464 | (do ((idx (1- (length str)))) ((< idx 0)) |
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| 465 | (let ((current-char (subseq str idx (1+ idx)))) |
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| 466 | (cond ((string= current-char ")") |
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| 467 | (when (or ignore-literals |
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| 468 | (not (in-literal-string-p str idx))) |
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| 469 | (decf open-brackets))) |
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| 470 | ((string= current-char "(") |
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| 471 | (when (or ignore-literals |
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| 472 | (not (in-literal-string-p str idx))) |
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| 473 | (incf open-brackets) |
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| 474 | (when (> open-brackets 0) |
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| 475 | (setf result-idx idx) |
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| 476 | (setf idx 0))))) |
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| 477 | (decf idx))) |
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| 478 | result-idx)) |
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| 479 | |
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| 480 | |
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| 481 | (defun search-first-unopened-paranthesis (str &key ignore-literals) |
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| 482 | "Returns the idx of the first paranthesis that is not opened in str. |
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| 483 | If ignore-literals is set to t all mparanthesis that are within |
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| 484 | \", \"\"\", ' and ''' are ignored." |
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| 485 | (declare (String str) |
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| 486 | (Boolean ignore-literals)) |
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| 487 | (let ((closed-brackets 0) |
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| 488 | (result-idx nil)) |
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| 489 | (dotimes (idx (length str)) |
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| 490 | (let ((current-char (subseq str idx (1+ idx)))) |
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| 491 | (cond ((string= current-char "(") |
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| 492 | (when (or ignore-literals |
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| 493 | (not (in-literal-string-p str idx))) |
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| 494 | (decf closed-brackets) |
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| 495 | (setf result-idx nil))) |
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| 496 | ((string= current-char ")") |
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| 497 | (when (or ignore-literals |
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| 498 | (not (in-literal-string-p str idx))) |
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| 499 | (incf closed-brackets) |
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| 500 | (when (> closed-brackets 0) |
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| 501 | (setf result-idx idx) |
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| 502 | (setf idx (length str)))))))) |
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| 503 | result-idx)) |
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| 504 | |
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| 505 | |
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| 506 | (defun return-if-starts-with (str to-be-matched &key from-end ignore-case |
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| 507 | ignore-leading-whitespace) |
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| 508 | "Returns the string that is contained in to-be-matched and that is the |
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| 509 | start of the string str." |
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| 510 | (declare (String str) |
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| 511 | (List to-be-matched) |
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| 512 | (Boolean from-end ignore-case ignore-leading-whitespace)) |
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| 513 | (let ((cleaned-str (if ignore-leading-whitespace |
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| 514 | (trim-whitespace-left str) |
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| 515 | str))) |
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| 516 | (loop for try in to-be-matched |
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| 517 | when (if from-end |
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| 518 | (string-ends-with cleaned-str try :ignore-case ignore-case) |
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| 519 | (string-starts-with cleaned-str try :ignore-case ignore-case)) |
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| 520 | return try))) |
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