mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-10 09:29:30 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
776 lines
26 KiB
Go
776 lines
26 KiB
Go
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package ext contains CEL extension libraries where each library defines a related set of
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// constants, functions, macros, or other configuration settings which may not be covered by
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// the core CEL spec.
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package ext
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import (
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"fmt"
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"math"
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"reflect"
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"strings"
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"unicode"
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"unicode/utf8"
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"golang.org/x/text/language"
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"github.com/google/cel-go/cel"
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"github.com/google/cel-go/common/types"
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"github.com/google/cel-go/common/types/ref"
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"github.com/google/cel-go/common/types/traits"
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)
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const (
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defaultLocale = "en-US"
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defaultPrecision = 6
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)
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// Strings returns a cel.EnvOption to configure extended functions for string manipulation.
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// As a general note, all indices are zero-based.
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//
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// # CharAt
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//
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// Returns the character at the given position. If the position is negative, or greater than
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// the length of the string, the function will produce an error:
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//
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// <string>.charAt(<int>) -> <string>
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//
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// Examples:
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//
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// 'hello'.charAt(4) // return 'o'
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// 'hello'.charAt(5) // return ''
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// 'hello'.charAt(-1) // error
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//
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// # Format
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//
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// Introduced at version: 1
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//
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// Returns a new string with substitutions being performed, printf-style.
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// The valid formatting clauses are:
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//
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// `%s` - substitutes a string. This can also be used on bools, lists, maps, bytes,
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// Duration and Timestamp, in addition to all numerical types (int, uint, and double).
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// Note that the dot/period decimal separator will always be used when printing a list
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// or map that contains a double, and that null can be passed (which results in the
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// string "null") in addition to types.
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// `%d` - substitutes an integer.
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// `%f` - substitutes a double with fixed-point precision. The default precision is 6, but
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// this can be adjusted. The strings `Infinity`, `-Infinity`, and `NaN` are also valid input
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// for this clause.
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// `%e` - substitutes a double in scientific notation. The default precision is 6, but this
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// can be adjusted.
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// `%b` - substitutes an integer with its equivalent binary string. Can also be used on bools.
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// `%x` - substitutes an integer with its equivalent in hexadecimal, or if given a string or
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// bytes, will output each character's equivalent in hexadecimal.
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// `%X` - same as above, but with A-F capitalized.
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// `%o` - substitutes an integer with its equivalent in octal.
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//
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// <string>.format(<list>) -> <string>
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//
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// Examples:
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//
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// "this is a string: %s\nand an integer: %d".format(["str", 42]) // returns "this is a string: str\nand an integer: 42"
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// "a double substituted with %%s: %s".format([64.2]) // returns "a double substituted with %s: 64.2"
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// "string type: %s".format([type(string)]) // returns "string type: string"
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// "timestamp: %s".format([timestamp("2023-02-03T23:31:20+00:00")]) // returns "timestamp: 2023-02-03T23:31:20Z"
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// "duration: %s".format([duration("1h45m47s")]) // returns "duration: 6347s"
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// "%f".format([3.14]) // returns "3.140000"
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// "scientific notation: %e".format([2.71828]) // returns "scientific notation: 2.718280\u202f\u00d7\u202f10\u2070\u2070"
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// "5 in binary: %b".format([5]), // returns "5 in binary; 101"
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// "26 in hex: %x".format([26]), // returns "26 in hex: 1a"
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// "26 in hex (uppercase): %X".format([26]) // returns "26 in hex (uppercase): 1A"
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// "30 in octal: %o".format([30]) // returns "30 in octal: 36"
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// "a map inside a list: %s".format([[1, 2, 3, {"a": "x", "b": "y", "c": "z"}]]) // returns "a map inside a list: [1, 2, 3, {"a":"x", "b":"y", "c":"d"}]"
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// "true bool: %s - false bool: %s\nbinary bool: %b".format([true, false, true]) // returns "true bool: true - false bool: false\nbinary bool: 1"
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//
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// Passing an incorrect type (a string to `%b`) is considered an error, as well as attempting
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// to use more formatting clauses than there are arguments (`%d %d %d` while passing two ints, for instance).
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// If compile-time checking is enabled, and the formatting string is a constant, and the argument list is a literal,
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// then letting any arguments go unused/unformatted is also considered an error.
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//
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// # IndexOf
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//
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// Returns the integer index of the first occurrence of the search string. If the search string is
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// not found the function returns -1.
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//
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// The function also accepts an optional position from which to begin the substring search. If the
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// substring is the empty string, the index where the search starts is returned (zero or custom).
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//
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// <string>.indexOf(<string>) -> <int>
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// <string>.indexOf(<string>, <int>) -> <int>
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//
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// Examples:
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//
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// 'hello mellow'.indexOf('') // returns 0
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// 'hello mellow'.indexOf('ello') // returns 1
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// 'hello mellow'.indexOf('jello') // returns -1
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// 'hello mellow'.indexOf('', 2) // returns 2
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// 'hello mellow'.indexOf('ello', 2) // returns 7
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// 'hello mellow'.indexOf('ello', 20) // returns -1
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// 'hello mellow'.indexOf('ello', -1) // error
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//
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// # Join
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//
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// Returns a new string where the elements of string list are concatenated.
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//
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// The function also accepts an optional separator which is placed between elements in the resulting string.
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//
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// <list<string>>.join() -> <string>
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// <list<string>>.join(<string>) -> <string>
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//
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// Examples:
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//
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// ['hello', 'mellow'].join() // returns 'hellomellow'
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// ['hello', 'mellow'].join(' ') // returns 'hello mellow'
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// [].join() // returns ''
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// [].join('/') // returns ''
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//
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// # LastIndexOf
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//
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// Returns the integer index at the start of the last occurrence of the search string. If the
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// search string is not found the function returns -1.
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//
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// The function also accepts an optional position which represents the last index to be
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// considered as the beginning of the substring match. If the substring is the empty string,
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// the index where the search starts is returned (string length or custom).
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//
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// <string>.lastIndexOf(<string>) -> <int>
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// <string>.lastIndexOf(<string>, <int>) -> <int>
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//
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// Examples:
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//
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// 'hello mellow'.lastIndexOf('') // returns 12
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// 'hello mellow'.lastIndexOf('ello') // returns 7
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// 'hello mellow'.lastIndexOf('jello') // returns -1
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// 'hello mellow'.lastIndexOf('ello', 6) // returns 1
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// 'hello mellow'.lastIndexOf('ello', 20) // returns -1
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// 'hello mellow'.lastIndexOf('ello', -1) // error
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//
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// # LowerAscii
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//
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// Returns a new string where all ASCII characters are lower-cased.
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//
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// This function does not perform Unicode case-mapping for characters outside the ASCII range.
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//
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// <string>.lowerAscii() -> <string>
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//
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// Examples:
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//
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// 'TacoCat'.lowerAscii() // returns 'tacocat'
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// 'TacoCÆt Xii'.lowerAscii() // returns 'tacocÆt xii'
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//
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// # Strings.Quote
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//
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// Introduced in version: 1
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//
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// Takes the given string and makes it safe to print (without any formatting due to escape sequences).
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// If any invalid UTF-8 characters are encountered, they are replaced with \uFFFD.
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//
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// strings.quote(<string>)
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//
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// Examples:
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//
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// strings.quote('single-quote with "double quote"') // returns '"single-quote with \"double quote\""'
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// strings.quote("two escape sequences \a\n") // returns '"two escape sequences \\a\\n"'
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//
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// # Replace
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//
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// Returns a new string based on the target, which replaces the occurrences of a search string
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// with a replacement string if present. The function accepts an optional limit on the number of
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// substring replacements to be made.
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//
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// When the replacement limit is 0, the result is the original string. When the limit is a negative
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// number, the function behaves the same as replace all.
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//
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// <string>.replace(<string>, <string>) -> <string>
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// <string>.replace(<string>, <string>, <int>) -> <string>
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//
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// Examples:
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//
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// 'hello hello'.replace('he', 'we') // returns 'wello wello'
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// 'hello hello'.replace('he', 'we', -1) // returns 'wello wello'
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// 'hello hello'.replace('he', 'we', 1) // returns 'wello hello'
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// 'hello hello'.replace('he', 'we', 0) // returns 'hello hello'
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// 'hello hello'.replace('', '_') // returns '_h_e_l_l_o_ _h_e_l_l_o_'
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// 'hello hello'.replace('h', '') // returns 'ello ello'
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//
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// # Split
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//
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// Returns a list of strings split from the input by the given separator. The function accepts
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// an optional argument specifying a limit on the number of substrings produced by the split.
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//
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// When the split limit is 0, the result is an empty list. When the limit is 1, the result is the
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// target string to split. When the limit is a negative number, the function behaves the same as
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// split all.
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//
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// <string>.split(<string>) -> <list<string>>
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// <string>.split(<string>, <int>) -> <list<string>>
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//
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// Examples:
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//
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// 'hello hello hello'.split(' ') // returns ['hello', 'hello', 'hello']
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// 'hello hello hello'.split(' ', 0) // returns []
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// 'hello hello hello'.split(' ', 1) // returns ['hello hello hello']
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// 'hello hello hello'.split(' ', 2) // returns ['hello', 'hello hello']
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// 'hello hello hello'.split(' ', -1) // returns ['hello', 'hello', 'hello']
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//
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// # Substring
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//
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// Returns the substring given a numeric range corresponding to character positions. Optionally
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// may omit the trailing range for a substring from a given character position until the end of
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// a string.
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//
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// Character offsets are 0-based with an inclusive start range and exclusive end range. It is an
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// error to specify an end range that is lower than the start range, or for either the start or end
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// index to be negative or exceed the string length.
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//
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// <string>.substring(<int>) -> <string>
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// <string>.substring(<int>, <int>) -> <string>
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//
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// Examples:
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//
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// 'tacocat'.substring(4) // returns 'cat'
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// 'tacocat'.substring(0, 4) // returns 'taco'
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// 'tacocat'.substring(-1) // error
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// 'tacocat'.substring(2, 1) // error
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//
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// # Trim
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//
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// Returns a new string which removes the leading and trailing whitespace in the target string.
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// The trim function uses the Unicode definition of whitespace which does not include the
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// zero-width spaces. See: https://en.wikipedia.org/wiki/Whitespace_character#Unicode
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//
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// <string>.trim() -> <string>
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//
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// Examples:
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//
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// ' \ttrim\n '.trim() // returns 'trim'
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//
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// # UpperAscii
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//
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// Returns a new string where all ASCII characters are upper-cased.
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//
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// This function does not perform Unicode case-mapping for characters outside the ASCII range.
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//
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// <string>.upperAscii() -> <string>
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//
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// Examples:
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//
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// 'TacoCat'.upperAscii() // returns 'TACOCAT'
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// 'TacoCÆt Xii'.upperAscii() // returns 'TACOCÆT XII'
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//
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// # Reverse
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//
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// Introduced at version: 3
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//
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// Returns a new string whose characters are the same as the target string, only formatted in
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// reverse order.
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// This function relies on converting strings to rune arrays in order to reverse
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//
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// <string>.reverse() -> <string>
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//
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// Examples:
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//
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// 'gums'.reverse() // returns 'smug'
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// 'John Smith'.reverse() // returns 'htimS nhoJ'
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func Strings(options ...StringsOption) cel.EnvOption {
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s := &stringLib{
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version: math.MaxUint32,
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validateFormat: true,
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}
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for _, o := range options {
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s = o(s)
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}
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return cel.Lib(s)
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}
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type stringLib struct {
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locale string
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version uint32
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validateFormat bool
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}
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// LibraryName implements the SingletonLibrary interface method.
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func (*stringLib) LibraryName() string {
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return "cel.lib.ext.strings"
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}
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// StringsOption is a functional interface for configuring the strings library.
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type StringsOption func(*stringLib) *stringLib
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// StringsLocale configures the library with the given locale. The locale tag will
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// be checked for validity at the time that EnvOptions are configured. If this option
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// is not passed, string.format will behave as if en_US was passed as the locale.
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func StringsLocale(locale string) StringsOption {
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return func(sl *stringLib) *stringLib {
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sl.locale = locale
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return sl
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}
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}
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// StringsVersion configures the version of the string library.
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//
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// The version limits which functions are available. Only functions introduced
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// below or equal to the given version included in the library. If this option
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// is not set, all functions are available.
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//
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// See the library documentation to determine which version a function was introduced.
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// If the documentation does not state which version a function was introduced, it can
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// be assumed to be introduced at version 0, when the library was first created.
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func StringsVersion(version uint32) StringsOption {
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return func(lib *stringLib) *stringLib {
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lib.version = version
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return lib
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}
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}
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// StringsValidateFormatCalls validates type-checked ASTs to ensure that string.format() calls have
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// valid formatting clauses and valid argument types for each clause.
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//
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// Enabled by default.
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func StringsValidateFormatCalls(value bool) StringsOption {
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return func(s *stringLib) *stringLib {
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s.validateFormat = value
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return s
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}
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}
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// CompileOptions implements the Library interface method.
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func (lib *stringLib) CompileOptions() []cel.EnvOption {
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formatLocale := "en_US"
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if lib.locale != "" {
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// ensure locale is properly-formed if set
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_, err := language.Parse(lib.locale)
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if err != nil {
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return []cel.EnvOption{
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func(e *cel.Env) (*cel.Env, error) {
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return nil, fmt.Errorf("failed to parse locale: %w", err)
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},
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}
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}
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formatLocale = lib.locale
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}
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opts := []cel.EnvOption{
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cel.Function("charAt",
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cel.MemberOverload("string_char_at_int", []*cel.Type{cel.StringType, cel.IntType}, cel.StringType,
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cel.BinaryBinding(func(str, ind ref.Val) ref.Val {
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s := str.(types.String)
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i := ind.(types.Int)
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return stringOrError(charAt(string(s), int64(i)))
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}))),
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cel.Function("indexOf",
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cel.MemberOverload("string_index_of_string", []*cel.Type{cel.StringType, cel.StringType}, cel.IntType,
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cel.BinaryBinding(func(str, substr ref.Val) ref.Val {
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s := str.(types.String)
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sub := substr.(types.String)
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return intOrError(indexOf(string(s), string(sub)))
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})),
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cel.MemberOverload("string_index_of_string_int", []*cel.Type{cel.StringType, cel.StringType, cel.IntType}, cel.IntType,
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cel.FunctionBinding(func(args ...ref.Val) ref.Val {
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s := args[0].(types.String)
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sub := args[1].(types.String)
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offset := args[2].(types.Int)
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return intOrError(indexOfOffset(string(s), string(sub), int64(offset)))
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}))),
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cel.Function("lastIndexOf",
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cel.MemberOverload("string_last_index_of_string", []*cel.Type{cel.StringType, cel.StringType}, cel.IntType,
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cel.BinaryBinding(func(str, substr ref.Val) ref.Val {
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s := str.(types.String)
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sub := substr.(types.String)
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return intOrError(lastIndexOf(string(s), string(sub)))
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})),
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cel.MemberOverload("string_last_index_of_string_int", []*cel.Type{cel.StringType, cel.StringType, cel.IntType}, cel.IntType,
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cel.FunctionBinding(func(args ...ref.Val) ref.Val {
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s := args[0].(types.String)
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sub := args[1].(types.String)
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offset := args[2].(types.Int)
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return intOrError(lastIndexOfOffset(string(s), string(sub), int64(offset)))
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}))),
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cel.Function("lowerAscii",
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cel.MemberOverload("string_lower_ascii", []*cel.Type{cel.StringType}, cel.StringType,
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cel.UnaryBinding(func(str ref.Val) ref.Val {
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s := str.(types.String)
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return stringOrError(lowerASCII(string(s)))
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}))),
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cel.Function("replace",
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cel.MemberOverload(
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"string_replace_string_string", []*cel.Type{cel.StringType, cel.StringType, cel.StringType}, cel.StringType,
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cel.FunctionBinding(func(args ...ref.Val) ref.Val {
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str := args[0].(types.String)
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old := args[1].(types.String)
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new := args[2].(types.String)
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return stringOrError(replace(string(str), string(old), string(new)))
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})),
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cel.MemberOverload(
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"string_replace_string_string_int", []*cel.Type{cel.StringType, cel.StringType, cel.StringType, cel.IntType}, cel.StringType,
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cel.FunctionBinding(func(args ...ref.Val) ref.Val {
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str := args[0].(types.String)
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old := args[1].(types.String)
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new := args[2].(types.String)
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n := args[3].(types.Int)
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return stringOrError(replaceN(string(str), string(old), string(new), int64(n)))
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}))),
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cel.Function("split",
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cel.MemberOverload("string_split_string", []*cel.Type{cel.StringType, cel.StringType}, cel.ListType(cel.StringType),
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cel.BinaryBinding(func(str, separator ref.Val) ref.Val {
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s := str.(types.String)
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sep := separator.(types.String)
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return listStringOrError(split(string(s), string(sep)))
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})),
|
|
cel.MemberOverload("string_split_string_int", []*cel.Type{cel.StringType, cel.StringType, cel.IntType}, cel.ListType(cel.StringType),
|
|
cel.FunctionBinding(func(args ...ref.Val) ref.Val {
|
|
s := args[0].(types.String)
|
|
sep := args[1].(types.String)
|
|
n := args[2].(types.Int)
|
|
return listStringOrError(splitN(string(s), string(sep), int64(n)))
|
|
}))),
|
|
cel.Function("substring",
|
|
cel.MemberOverload("string_substring_int", []*cel.Type{cel.StringType, cel.IntType}, cel.StringType,
|
|
cel.BinaryBinding(func(str, offset ref.Val) ref.Val {
|
|
s := str.(types.String)
|
|
off := offset.(types.Int)
|
|
return stringOrError(substr(string(s), int64(off)))
|
|
})),
|
|
cel.MemberOverload("string_substring_int_int", []*cel.Type{cel.StringType, cel.IntType, cel.IntType}, cel.StringType,
|
|
cel.FunctionBinding(func(args ...ref.Val) ref.Val {
|
|
s := args[0].(types.String)
|
|
start := args[1].(types.Int)
|
|
end := args[2].(types.Int)
|
|
return stringOrError(substrRange(string(s), int64(start), int64(end)))
|
|
}))),
|
|
cel.Function("trim",
|
|
cel.MemberOverload("string_trim", []*cel.Type{cel.StringType}, cel.StringType,
|
|
cel.UnaryBinding(func(str ref.Val) ref.Val {
|
|
s := str.(types.String)
|
|
return stringOrError(trimSpace(string(s)))
|
|
}))),
|
|
cel.Function("upperAscii",
|
|
cel.MemberOverload("string_upper_ascii", []*cel.Type{cel.StringType}, cel.StringType,
|
|
cel.UnaryBinding(func(str ref.Val) ref.Val {
|
|
s := str.(types.String)
|
|
return stringOrError(upperASCII(string(s)))
|
|
}))),
|
|
}
|
|
if lib.version >= 1 {
|
|
opts = append(opts, cel.Function("format",
|
|
cel.MemberOverload("string_format", []*cel.Type{cel.StringType, cel.ListType(cel.DynType)}, cel.StringType,
|
|
cel.FunctionBinding(func(args ...ref.Val) ref.Val {
|
|
s := string(args[0].(types.String))
|
|
formatArgs := args[1].(traits.Lister)
|
|
return stringOrError(parseFormatString(s, &stringFormatter{}, &stringArgList{formatArgs}, formatLocale))
|
|
}))),
|
|
cel.Function("strings.quote", cel.Overload("strings_quote", []*cel.Type{cel.StringType}, cel.StringType,
|
|
cel.UnaryBinding(func(str ref.Val) ref.Val {
|
|
s := str.(types.String)
|
|
return stringOrError(quote(string(s)))
|
|
}))),
|
|
|
|
cel.ASTValidators(stringFormatValidator{}))
|
|
|
|
}
|
|
if lib.version >= 2 {
|
|
opts = append(opts,
|
|
cel.Function("join",
|
|
cel.MemberOverload("list_join", []*cel.Type{cel.ListType(cel.StringType)}, cel.StringType,
|
|
cel.UnaryBinding(func(list ref.Val) ref.Val {
|
|
l := list.(traits.Lister)
|
|
return stringOrError(joinValSeparator(l, ""))
|
|
})),
|
|
cel.MemberOverload("list_join_string", []*cel.Type{cel.ListType(cel.StringType), cel.StringType}, cel.StringType,
|
|
cel.BinaryBinding(func(list, delim ref.Val) ref.Val {
|
|
l := list.(traits.Lister)
|
|
d := delim.(types.String)
|
|
return stringOrError(joinValSeparator(l, string(d)))
|
|
}))),
|
|
)
|
|
} else {
|
|
opts = append(opts,
|
|
cel.Function("join",
|
|
cel.MemberOverload("list_join", []*cel.Type{cel.ListType(cel.StringType)}, cel.StringType,
|
|
cel.UnaryBinding(func(list ref.Val) ref.Val {
|
|
l, err := list.ConvertToNative(stringListType)
|
|
if err != nil {
|
|
return types.WrapErr(err)
|
|
}
|
|
return stringOrError(join(l.([]string)))
|
|
})),
|
|
cel.MemberOverload("list_join_string", []*cel.Type{cel.ListType(cel.StringType), cel.StringType}, cel.StringType,
|
|
cel.BinaryBinding(func(list, delim ref.Val) ref.Val {
|
|
l, err := list.ConvertToNative(stringListType)
|
|
if err != nil {
|
|
return types.WrapErr(err)
|
|
}
|
|
d := delim.(types.String)
|
|
return stringOrError(joinSeparator(l.([]string), string(d)))
|
|
}))),
|
|
)
|
|
}
|
|
if lib.version >= 3 {
|
|
opts = append(opts,
|
|
cel.Function("reverse",
|
|
cel.MemberOverload("string_reverse", []*cel.Type{cel.StringType}, cel.StringType,
|
|
cel.UnaryBinding(func(str ref.Val) ref.Val {
|
|
s := str.(types.String)
|
|
return stringOrError(reverse(string(s)))
|
|
}))),
|
|
)
|
|
}
|
|
if lib.validateFormat {
|
|
opts = append(opts, cel.ASTValidators(stringFormatValidator{}))
|
|
}
|
|
return opts
|
|
}
|
|
|
|
// ProgramOptions implements the Library interface method.
|
|
func (*stringLib) ProgramOptions() []cel.ProgramOption {
|
|
return []cel.ProgramOption{}
|
|
}
|
|
|
|
func charAt(str string, ind int64) (string, error) {
|
|
i := int(ind)
|
|
runes := []rune(str)
|
|
if i < 0 || i > len(runes) {
|
|
return "", fmt.Errorf("index out of range: %d", ind)
|
|
}
|
|
if i == len(runes) {
|
|
return "", nil
|
|
}
|
|
return string(runes[i]), nil
|
|
}
|
|
|
|
func indexOf(str, substr string) (int64, error) {
|
|
return indexOfOffset(str, substr, int64(0))
|
|
}
|
|
|
|
func indexOfOffset(str, substr string, offset int64) (int64, error) {
|
|
if substr == "" {
|
|
return offset, nil
|
|
}
|
|
off := int(offset)
|
|
runes := []rune(str)
|
|
subrunes := []rune(substr)
|
|
if off < 0 {
|
|
return -1, fmt.Errorf("index out of range: %d", off)
|
|
}
|
|
// If the offset exceeds the length, return -1 rather than error.
|
|
if off >= len(runes) {
|
|
return -1, nil
|
|
}
|
|
for i := off; i < len(runes)-(len(subrunes)-1); i++ {
|
|
found := true
|
|
for j := 0; j < len(subrunes); j++ {
|
|
if runes[i+j] != subrunes[j] {
|
|
found = false
|
|
break
|
|
}
|
|
}
|
|
if found {
|
|
return int64(i), nil
|
|
}
|
|
}
|
|
return -1, nil
|
|
}
|
|
|
|
func lastIndexOf(str, substr string) (int64, error) {
|
|
runes := []rune(str)
|
|
if substr == "" {
|
|
return int64(len(runes)), nil
|
|
}
|
|
return lastIndexOfOffset(str, substr, int64(len(runes)-1))
|
|
}
|
|
|
|
func lastIndexOfOffset(str, substr string, offset int64) (int64, error) {
|
|
if substr == "" {
|
|
return offset, nil
|
|
}
|
|
off := int(offset)
|
|
runes := []rune(str)
|
|
subrunes := []rune(substr)
|
|
if off < 0 {
|
|
return -1, fmt.Errorf("index out of range: %d", off)
|
|
}
|
|
// If the offset is far greater than the length return -1
|
|
if off >= len(runes) {
|
|
return -1, nil
|
|
}
|
|
if off > len(runes)-len(subrunes) {
|
|
off = len(runes) - len(subrunes)
|
|
}
|
|
for i := off; i >= 0; i-- {
|
|
found := true
|
|
for j := 0; j < len(subrunes); j++ {
|
|
if runes[i+j] != subrunes[j] {
|
|
found = false
|
|
break
|
|
}
|
|
}
|
|
if found {
|
|
return int64(i), nil
|
|
}
|
|
}
|
|
return -1, nil
|
|
}
|
|
|
|
func lowerASCII(str string) (string, error) {
|
|
runes := []rune(str)
|
|
for i, r := range runes {
|
|
if r <= unicode.MaxASCII {
|
|
r = unicode.ToLower(r)
|
|
runes[i] = r
|
|
}
|
|
}
|
|
return string(runes), nil
|
|
}
|
|
|
|
func replace(str, old, new string) (string, error) {
|
|
return strings.ReplaceAll(str, old, new), nil
|
|
}
|
|
|
|
func replaceN(str, old, new string, n int64) (string, error) {
|
|
return strings.Replace(str, old, new, int(n)), nil
|
|
}
|
|
|
|
func split(str, sep string) ([]string, error) {
|
|
return strings.Split(str, sep), nil
|
|
}
|
|
|
|
func splitN(str, sep string, n int64) ([]string, error) {
|
|
return strings.SplitN(str, sep, int(n)), nil
|
|
}
|
|
|
|
func substr(str string, start int64) (string, error) {
|
|
runes := []rune(str)
|
|
if int(start) < 0 || int(start) > len(runes) {
|
|
return "", fmt.Errorf("index out of range: %d", start)
|
|
}
|
|
return string(runes[start:]), nil
|
|
}
|
|
|
|
func substrRange(str string, start, end int64) (string, error) {
|
|
runes := []rune(str)
|
|
l := len(runes)
|
|
if start > end {
|
|
return "", fmt.Errorf("invalid substring range. start: %d, end: %d", start, end)
|
|
}
|
|
if int(start) < 0 || int(start) > l {
|
|
return "", fmt.Errorf("index out of range: %d", start)
|
|
}
|
|
if int(end) < 0 || int(end) > l {
|
|
return "", fmt.Errorf("index out of range: %d", end)
|
|
}
|
|
return string(runes[int(start):int(end)]), nil
|
|
}
|
|
|
|
func trimSpace(str string) (string, error) {
|
|
return strings.TrimSpace(str), nil
|
|
}
|
|
|
|
func upperASCII(str string) (string, error) {
|
|
runes := []rune(str)
|
|
for i, r := range runes {
|
|
if r <= unicode.MaxASCII {
|
|
r = unicode.ToUpper(r)
|
|
runes[i] = r
|
|
}
|
|
}
|
|
return string(runes), nil
|
|
}
|
|
|
|
func reverse(str string) (string, error) {
|
|
chars := []rune(str)
|
|
for i, j := 0, len(chars)-1; i < j; i, j = i+1, j-1 {
|
|
chars[i], chars[j] = chars[j], chars[i]
|
|
}
|
|
return string(chars), nil
|
|
}
|
|
|
|
func joinSeparator(strs []string, separator string) (string, error) {
|
|
return strings.Join(strs, separator), nil
|
|
}
|
|
|
|
func join(strs []string) (string, error) {
|
|
return strings.Join(strs, ""), nil
|
|
}
|
|
|
|
func joinValSeparator(strs traits.Lister, separator string) (string, error) {
|
|
sz := strs.Size().(types.Int)
|
|
var sb strings.Builder
|
|
for i := types.Int(0); i < sz; i++ {
|
|
if i != 0 {
|
|
sb.WriteString(separator)
|
|
}
|
|
elem := strs.Get(i)
|
|
str, ok := elem.(types.String)
|
|
if !ok {
|
|
return "", fmt.Errorf("join: invalid input: %v", elem)
|
|
}
|
|
sb.WriteString(string(str))
|
|
}
|
|
return sb.String(), nil
|
|
}
|
|
|
|
// quote implements a string quoting function. The string will be wrapped in
|
|
// double quotes, and all valid CEL escape sequences will be escaped to show up
|
|
// literally if printed. If the input contains any invalid UTF-8, the invalid runes
|
|
// will be replaced with utf8.RuneError.
|
|
func quote(s string) (string, error) {
|
|
var quotedStrBuilder strings.Builder
|
|
for _, c := range sanitize(s) {
|
|
switch c {
|
|
case '\a':
|
|
quotedStrBuilder.WriteString("\\a")
|
|
case '\b':
|
|
quotedStrBuilder.WriteString("\\b")
|
|
case '\f':
|
|
quotedStrBuilder.WriteString("\\f")
|
|
case '\n':
|
|
quotedStrBuilder.WriteString("\\n")
|
|
case '\r':
|
|
quotedStrBuilder.WriteString("\\r")
|
|
case '\t':
|
|
quotedStrBuilder.WriteString("\\t")
|
|
case '\v':
|
|
quotedStrBuilder.WriteString("\\v")
|
|
case '\\':
|
|
quotedStrBuilder.WriteString("\\\\")
|
|
case '"':
|
|
quotedStrBuilder.WriteString("\\\"")
|
|
default:
|
|
quotedStrBuilder.WriteRune(c)
|
|
}
|
|
}
|
|
escapedStr := quotedStrBuilder.String()
|
|
return "\"" + escapedStr + "\"", nil
|
|
}
|
|
|
|
// sanitize replaces all invalid runes in the given string with utf8.RuneError.
|
|
func sanitize(s string) string {
|
|
var sanitizedStringBuilder strings.Builder
|
|
for _, r := range s {
|
|
if !utf8.ValidRune(r) {
|
|
sanitizedStringBuilder.WriteRune(utf8.RuneError)
|
|
} else {
|
|
sanitizedStringBuilder.WriteRune(r)
|
|
}
|
|
}
|
|
return sanitizedStringBuilder.String()
|
|
}
|
|
|
|
var (
|
|
stringListType = reflect.TypeOf([]string{})
|
|
)
|