# std/cstrutils

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This module supports helper routines for working with `cstring` without having to convert `cstring` to `string`, in order to save allocations.

# See also

- strutils module for working with `string`

# Imports

strimpl

# Procs

    func cmpIgnoreCase(a, b: cstring): int {....gcsafe, extern: "csuCmpIgnoreCase",
        raises: [], tags: [].}

  Compares two strings in a case insensitive manner. Returns:
  - 0 if `a == b`
  - < 0 if `a < b`
  - > 0 if `a > b`

  Example:

      assert cmpIgnoreCase(cstring"hello", cstring"HeLLo") == 0
      assert cmpIgnoreCase(cstring"echo", cstring"hello") < 0
      assert cmpIgnoreCase(cstring"yellow", cstring"hello") > 0

  Source Edit

    func cmpIgnoreStyle(a, b: cstring): int {....gcsafe, extern: "csuCmpIgnoreStyle",
        raises: [], tags: [].}

  Semantically the same as `cmp(normalize($a), normalize($b))`. It is just optimized to not allocate temporary strings. This should NOT be used to compare Nim identifier names, use `macros.eqIdent` for that. Returns:
  - 0 if `a == b`
  - < 0 if `a < b`
  - > 0 if `a > b`

  Example:

      assert cmpIgnoreStyle(cstring"hello", cstring"H_e_L_Lo") == 0

  Source Edit

    func endsWith(s, suffix: cstring): bool {....gcsafe, extern: "csuEndsWith",
        raises: [], tags: [].}

  Returns true if `s` ends with `suffix`.

  The JS backend uses the native `String.prototype.endsWith` function.

  Example:

      assert endsWith(cstring"Hello, Nimion", cstring"Nimion")
      assert not endsWith(cstring"Hello, Nimion", cstring"Hello")
      assert endsWith(cstring"Hello", cstring"")

  Source Edit

    func startsWith(s, prefix: cstring): bool {....gcsafe, extern: "csuStartsWith",
        raises: [], tags: [].}

  Returns true if `s` starts with `prefix`.

  The JS backend uses the native `String.prototype.startsWith` function.

  Example:

      assert startsWith(cstring"Hello, Nimion", cstring"Hello")
      assert not startsWith(cstring"Hello, Nimion", cstring"Nimion")
      assert startsWith(cstring"Hello", cstring"")

  Source Edit