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# dmd.utils

This module defines some utility functions for DMD.
Authors:
Walter Bright
License:
Boost License 1.0

Source utils.d

Documentation https://dlang.org/phobos/dmd_utils.html

Coverage https://codecov.io/gh/dlang/dmd/src/master/src/dmd/utils.d

const(char)* `toWinPath`(const(char)* `src`);
  Normalize path by turning forward slashes into backslashes
  Parameters:

  const(char)* `src` | Source path, using unix-style ('/') path separators

  Returns:
  A newly-allocated string with '/' turned into backslashes
FileBuffer `readFile`(Loc `loc`, const(char)* `filename`);
FileBuffer `readFile`(Loc `loc`, const(char)[] `filename`);
  Reads a file, terminate the program on error
  Parameters:

  Loc `loc` | The line number information from where the call originates
  const(char)* `filename` | Path to file

void `writeFile`(Loc `loc`, const(char)[] `filename`, const void[] `data`);
  Writes a file, terminate the program on error
  Parameters:

  Loc `loc` | The line number information from where the call originates
  const(char)[] `filename` | Path to file
  void[] `data` | Full content of the file to be written

void `ensurePathToNameExists`(Loc `loc`, const(char)[] `name`);
  Ensure the root path (the path minus the name) of the provided path exists, and terminate the process if it doesn't.
  Parameters:

  Loc `loc` | The line number information from where the call originates
  const(char)[] `name` | a path to check (the name is stripped)

void `escapePath`(OutBuffer* `buf`, const(char)* `fname`);
  Takes a path, and escapes '(', ')' and backslashes
  Parameters:

  OutBuffer* `buf` | Buffer to write the escaped path to
  const(char)* `fname` | Path to escape

pure nothrow @nogc @safe bool `parseDigits`(T)(ref T `val`, const(char)[] `p`, const T `max` = T.`max`);
  Convert string to integer.
  Parameters:

  T | Type of integer to parse
  T `val` | Variable to store the result in
  const(char)[] `p` | slice to start of string digits
  T `max` | max allowable value (inclusive), defaults to T.`max`

  Returns:
  false on error, true on success
  Examples:

      byte b;
      ubyte ub;
      short s;
      ushort us;
      int i;
      uint ui;
      long l;
      ulong ul;

      assert(b.parseDigits("42") && b  == 42);
      assert(ub.parseDigits("42") && ub == 42);

      assert(s.parseDigits("420") && s  == 420);
      assert(us.parseDigits("42000") && us == 42_000);

      assert(i.parseDigits("420000") && i  == 420_000);
      assert(ui.parseDigits("420000") && ui == 420_000);

      assert(l.parseDigits("42000000000") && l  == 42_000_000_000);
      assert(ul.parseDigits("82000000000") && ul == 82_000_000_000);

      assert(!b.parseDigits(ubyte.max.stringof));
      assert(!b.parseDigits("WYSIWYG"));
      assert(!b.parseDigits("-42"));
      assert(!b.parseDigits("200"));
      assert(ub.parseDigits("200") && ub == 200);
      assert(i.parseDigits(int.max.stringof) && i == int.max);
      assert(i.parseDigits("420", 500) && i == 420);
      assert(!i.parseDigits("420", 400));

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