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117 lines
4.1 KiB
Plaintext
117 lines
4.1 KiB
Plaintext
(system-include "carp_pattern.h")
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(defmodule Pattern
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(doc find "finds the index of a pattern in a string.
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Returns `-1` if it doesn’t find a matching pattern.")
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(register find (Fn [&Pattern &String] Int))
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(doc find-all "finds all indices of a pattern in a string.
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Returns `[]` if it doesn’t find a matching pattern.")
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(register find-all (Fn [&Pattern &String] (Array Int)))
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(doc match-groups "finds the match groups of the first match of a pattern in a string.
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Returns `[]` if it doesn’t find a matching pattern.")
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(register match-groups (Fn [&Pattern &String] (Array String)))
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(doc match-str "finds the first match of a pattern in a string.
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Returns `[]` if it doesn’t find a matching pattern.")
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(register match-str (Fn [&Pattern &String] String))
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(doc global-match "finds all matches of a pattern in a string as a nested array.
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Returns `[]` if it doesn’t find a matching pattern.")
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(register global-match (Fn [&Pattern &String] (Array (Array String))))
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(doc substitute "finds all matches of a pattern in a string and replaces it by another pattern `n` times.
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If you want to replace all occurrences of the pattern, use `-1`.")
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(register substitute (Fn [&Pattern &String &String Int] String))
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(doc matches? "checks whether a pattern matches a string.")
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(defn matches? [pat s] (/= (find pat s) -1))
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(register str (Fn [&Pattern] String))
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(register prn (Fn [&Pattern] String))
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(register init (Fn [&String] Pattern))
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(register = (Fn [&Pattern &Pattern] Bool))
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(register delete (Fn [Pattern] ()))
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(register copy (Fn [&Pattern] Pattern))
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(doc from-chars "creates a pattern that matches a group of characters from a list of those characters.")
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(defn from-chars [chars]
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(Pattern.init &(str* @"[" (String.from-chars chars) @"]")))
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)
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(defmodule String
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(doc in? "checks whether a string contains another string.")
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(defn in? [s sub]
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(Pattern.matches? &(Pattern.init sub) s))
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(doc upper? "checks whether a string is all uppercase.")
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(defn upper? [s]
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(Pattern.matches? #"^[\u\s\p]*$" s))
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(doc lower? "checks whether a string is all lowercase.")
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(defn lower? [s]
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(Pattern.matches? #"^[\l\s\p]*$" s))
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(doc num? "checks whether a string is numerical.")
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(defn num? [s]
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(Pattern.matches? #"^[0-9]*$" s))
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(doc alpha? "checks whether a string contains only alphabetical characters (a-Z).")
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(defn alpha? [s]
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(Pattern.matches? #"^[\u\l]*$" s))
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(doc alphanum? "checks whether a string is alphanumerical.")
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(defn alphanum? [s]
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(Pattern.matches? #"^[\w]*$" s))
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(doc hex? "checks whether a string is hexadecimal.")
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(defn hex? [s]
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(Pattern.matches? #"^[\x]*$" s))
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(doc trim-left "trims whitespace from the left of a string.")
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(defn trim-left [s]
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(Pattern.substitute #"^\s+" s "" 1))
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(doc trim-right "trims whitespace from the right of a string.")
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(defn trim-right [s]
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(Pattern.substitute #"\s+$" s "" 1))
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(doc trim "trims whitespace from both sides of a string.")
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(defn trim [s]
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(trim-left &(trim-right s)))
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(doc chomp "trims a newline from the end of a string.")
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(defn chomp [s]
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(Pattern.substitute #"\n$" s "" 1))
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(doc collapse-whitespace "collapses groups of whitespace into single spaces.")
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(defn collapse-whitespace [s]
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(Pattern.substitute #"\s+" s " " -1))
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(doc split-by "splits a string by separators.")
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(defn split-by [s separators]
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(let-do [pat (Pattern.from-chars separators)
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idx (Pattern.find-all &pat s)
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lidx (Array.length &idx)
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result (Array.allocate (Int.inc lidx))]
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(Array.aset-uninitialized! &result 0
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(substring s 0 (if (> lidx 0) @(Array.nth &idx 0) (length s))))
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(for [i 0 (Int.dec (Array.length &idx))]
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(Array.aset-uninitialized! &result (Int.inc i)
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(substring s (Int.inc @(Array.nth &idx i)) @(Array.nth &idx (Int.inc i)))))
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(when (> lidx 0)
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(Array.aset-uninitialized! &result lidx
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(suffix-string s (Int.inc @(Array.nth &idx (Int.dec lidx))))))
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result))
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(doc words "splits a string into words.")
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(defn words [s]
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(split-by s &[\tab \space]))
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(doc lines "splits a string into lines.")
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(defn lines [s]
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(split-by s &[\newline]))
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)
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