goo/GooString.h

//========================================================================
//
// GooString.h
//
// Simple variable-length string type.
//
// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================

//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2006 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2006 Krzysztof Kowalczyk <kkowalczyk@gmail.com>
// Copyright (C) 2008-2010, 2012, 2014, 2017, 2018 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2012-2014 Fabio D'Urso <fabiodurso@hotmail.it>
// Copyright (C) 2013 Jason Crain <jason@aquaticape.us>
// Copyright (C) 2015, 2018 Adam Reichold <adam.reichold@t-online.de>
// Copyright (C) 2016 Jakub Alba <jakubalba@gmail.com>
// Copyright (C) 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
// Copyright (C) 2019 Christophe Fergeau <cfergeau@redhat.com>
// Copyright (C) 2019 Tomoyuki Kubota <himajin100000@gmail.com>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================

#ifndef GooString_H
#define GooString_H

#include <cstdarg>
#include <string>

#ifdef __clang__
# define GOOSTRING_FORMAT __attribute__((__annotate__("gooformat")))
#else
# define GOOSTRING_FORMAT
#endif

class GooString : private std::string {
public:

  // Create an empty string.
  GooString() = default;

  // Destructor.
  ~GooString() = default;

  GooString(GooString &&other) = default;
  GooString& operator=(GooString &&other) = default;

  GooString(const GooString &other) = delete;
  GooString& operator=(const GooString &other) = delete;

  // Create a string from a C string.
  explicit GooString(const char *sA) : std::string(sA ? sA : "") {}

  // Zero-cost conversion from and to std::string
  explicit GooString(const std::string& str) : std::string(str) {}
  explicit GooString(std::string&& str) : std::string(std::move(str)) {}

  const std::string& toStr() const { return *this; }

  // Create a string from <lengthA> chars at <sA>.  This string
  // can contain null characters.
  GooString(const char *sA, int lengthA) : std::string(sA ? sA : "", sA ? lengthA : 0) {}

  // Create a string from <lengthA> chars at <idx> in <str>.
  GooString(const GooString *str, int idx, int lengthA) : std::string(*str, idx, lengthA) {}

  // Set content of a string to <newStr>.
  GooString* Set(const GooString *newStr) { assign(newStr ? static_cast<const std::string&>(*newStr) : std::string{}); return this; }
  GooString* Set(const char *newStr) { assign(newStr ? newStr : ""); return this; }
  GooString* Set(const char *newStr, int newLen) { assign(newStr ? newStr : "", newStr ? newLen : 0); return this; }

  // Copy a string.
  explicit GooString(const GooString *str) : std::string(str ? static_cast<const std::string&>(*str) : std::string{}) {}
  GooString *copy() const { return new GooString(this); }

  // Concatenate two strings.
  GooString(const GooString *str1, const GooString *str2) {
    reserve(str1->size() + str2->size());
    static_cast<std::string&>(*this).append(*str1);
    static_cast<std::string&>(*this).append(*str2);
  }

  // Convert an integer to a string.
  static GooString *fromInt(int x);

  // Create a formatted string.  Similar to printf, but without the
  // string overflow issues.  Formatting elements consist of:
  //     {<arg>:[<width>][.<precision>]<type>}
  // where:
  // - <arg> is the argument number (arg 0 is the first argument
  //   following the format string) -- NB: args must be first used in
  //   order; they can be reused in any order
  // - <width> is the field width -- negative to reverse the alignment;
  //   starting with a leading zero to zero-fill (for integers)
  // - <precision> is the number of digits to the right of the decimal
  //   point (for floating point numbers)
  // - <type> is one of:
  //     d, x, X, o, b -- int in decimal, lowercase hex, uppercase hex, octal, binary
  //     ud, ux, uX, uo, ub -- unsigned int
  //     ld, lx, lX, lo, lb, uld, ulx, ulX, ulo, ulb -- long, unsigned long
  //     lld, llx, llX, llo, llb, ulld, ullx, ullX, ullo, ullb
  //         -- long long, unsigned long long
  //     f, g, gs -- floating point (float or double)
  //         f  -- always prints trailing zeros (eg 1.0 with .2f will print 1.00)
  //         g  -- omits trailing zeros and, if possible, the dot (eg 1.0 shows up as 1)
  //         gs -- is like g, but treats <precision> as number of significant
  //               digits to show (eg 0.0123 with .2gs will print 0.012)
  //     c -- character (char, short or int)
  //     s -- string (char *)
  //     t -- GooString *
  //     w -- blank space; arg determines width
  // To get literal curly braces, use {{ or }}.
  static GooString *format(const char *fmt, ...) GOOSTRING_FORMAT;
  static GooString *formatv(const char *fmt, va_list argList);

  // Get length.
  int getLength() const { return size(); }

  // Get C string.
  using std::string::c_str;

  // Get <i>th character.
  char getChar(int i) const { return (*this)[i]; }

  // Change <i>th character.
  void setChar(int i, char c) { (*this)[i] = c; }

  // Clear string to zero length.
  GooString *clear() { static_cast<std::string&>(*this).clear(); return this; }

  // Append a character or string.
  GooString *append(char c) { push_back(c); return this; }
  GooString *append(const GooString *str) { static_cast<std::string&>(*this).append(*str); return this; }
  GooString *append(const char *str) { static_cast<std::string&>(*this).append(str); return this; }
  GooString *append(const char *str, int lengthA) { static_cast<std::string&>(*this).append(str, lengthA); return this; }

  // Append a formatted string.
  GooString *appendf(const char *fmt, ...) GOOSTRING_FORMAT;
  GooString *appendfv(const char *fmt, va_list argList);

  // Insert a character or string.
  GooString *insert(int i, char c) { static_cast<std::string&>(*this).insert(i, 1, c); return this; }
  GooString *insert(int i, const GooString *str) { static_cast<std::string&>(*this).insert(i, *str); return this; }
  GooString *insert(int i, const char *str) { static_cast<std::string&>(*this).insert(i, str); return this; }
  GooString *insert(int i, const char *str, int lengthA) { static_cast<std::string&>(*this).insert(i, str, lengthA); return this; }

  // Delete a character or range of characters.
  GooString *del(int i, int n = 1) { erase(i, n); return this; }

  // Convert string to all-upper/all-lower case.
  GooString *upperCase();
  GooString *lowerCase();

  // Compare two strings:  -1:<  0:=  +1:>
  int cmp(const GooString *str) const { return compare(*str); }
  int cmpN(GooString *str, int n) const { return compare(0, n, *str); }
  int cmp(const char *sA) const { return compare(sA); }
  int cmpN(const char *sA, int n) const { return compare(0, n, sA); }

  // Return true if strings starts with prefix
  bool startsWith(const char *prefix) const;
  // Return true if string ends with suffix
  bool endsWith(const char *suffix) const;

  bool hasUnicodeMarker() const { return size() >= 2 && (*this)[0] == '\xfe' && (*this)[1] == '\xff'; }
  bool hasUnicodeMarkerLE() const { return size() >= 2 && (*this)[0] == '\xff' && (*this)[1] == '\xfe'; }
  bool hasJustUnicodeMarker() const { return size() == 2 && hasUnicodeMarker(); }

  void prependUnicodeMarker();

  // Sanitizes the string so that it does
  // not contain any ( ) < > [ ] { } / %
  // The postscript mode also has some more strict checks
  // The caller owns the return value
  GooString *sanitizedName(bool psmode) const;
};

#endif