string.cpp File Reference

Handling of C-type strings (char*). More...

#include "stdafx.h"
#include "debug.h"
#include "core/alloc_func.hpp"
#include "core/math_func.hpp"
#include "string_func.h"
#include "table/control_codes.h"
#include <stdarg.h>
#include <ctype.h>
#include <unicode/ustring.h>
#include "language.h"
#include "gfx_func.h"

Go to the source code of this file.

Functions

static int CDECL vseprintf (char *str, const char *last, const char *format, va_list ap)
 Safer implementation of vsnprintf; same as vsnprintf except:

  • last instead of size, i.e.

void ttd_strlcat (char *dst, const char *src, size_t size)
 Appends characters from one string to another.
void ttd_strlcpy (char *dst, const char *src, size_t size)
 Copies characters from one buffer to another.
char * strecat (char *dst, const char *src, const char *last)
 Appends characters from one string to another.
char * strecpy (char *dst, const char *src, const char *last)
 Copies characters from one buffer to another.
char *CDECL str_fmt (const char *str,...)
void str_validate (char *str, const char *last, bool allow_newlines, bool ignore)
 Scans the string for valid characters and if it finds invalid ones, replaces them with a question mark '?' (if not ignored).
bool StrValid (const char *str, const char *last)
 Checks whether the given string is valid, i.e.
void str_strip_colours (char *str)
 Scans the string for colour codes and strips them.
size_t Utf8StringLength (const char *s)
 Get the length of an UTF-8 encoded string in number of characters and thus not the number of bytes that the encoded string contains.
void strtolower (char *str)
 Convert a given ASCII string to lowercase.
bool IsValidChar (WChar key, CharSetFilter afilter)
 Only allow certain keys.
int CDECL seprintf (char *str, const char *last, const char *format,...)
 Safer implementation of snprintf; same as snprintf except:

  • last instead of size, i.e.

char * md5sumToString (char *buf, const char *last, const uint8 md5sum[16])
 Convert the md5sum to a hexadecimal string representation.
size_t Utf8Decode (WChar *c, const char *s)
 Decode and consume the next UTF-8 encoded character.
size_t Utf8Encode (char *buf, WChar c)
 Encode a unicode character and place it in the buffer.
size_t Utf8TrimString (char *s, size_t maxlen)
 Properly terminate an UTF8 string to some maximum length.
int strnatcmp (const char *s1, const char *s2)
 Compares two strings using case insensitive natural sort.

Detailed Description

Handling of C-type strings (char*).

Definition in file string.cpp.


Function Documentation

bool IsValidChar ( WChar  key,
CharSetFilter  afilter 
)

Only allow certain keys.

You can define the filter to be used. This makes sure no invalid keys can get into an editbox, like BELL.

Parameters:
key character to be checked
afilter the filter to use
Returns:
true or false depending if the character is printable/valid or not

Definition at line 331 of file string.cpp.

References CS_ALPHA, CS_ALPHANUMERAL, CS_HEXADECIMAL, CS_NUMERAL, and CS_NUMERAL_SPACE.

Referenced by IConsoleCmdExec(), OskWindow::OnClick(), IConsoleWindow::OnKeyPress(), TranslateTTDPatchCodes(), and OskWindow::UpdateOskState().

char* md5sumToString ( char *  buf,
const char *  last,
const uint8  md5sum[16] 
)

Convert the md5sum to a hexadecimal string representation.

Parameters:
buf buffer to put the md5sum into
last last character of buffer (usually lastof(buf))
md5sum the md5sum itself
Returns:
a pointer to the next character after the md5sum

Definition at line 423 of file string.cpp.

References seprintf().

Referenced by HandleSavegameLoadCrash(), IsGoodGRFConfigList(), and PrintGrfInfo().

int CDECL seprintf ( char *  str,
const char *  last,
const char *  format,
  ... 
)

Safer implementation of snprintf; same as snprintf except:

  • last instead of size, i.e.

replace sizeof with lastof.

  • return gives the amount of characters added, not what it would add.
    Parameters:
    str buffer to write to up to last
    last last character we may write to
    format the formatting (see snprintf)
    Returns:
    the number of added characters

Definition at line 405 of file string.cpp.

References vseprintf().

Referenced by AI_CreateAIDummy(), CheckExternalFiles(), CloneVehicleName(), CrashLogOSX::DisplayCrashDialog(), NetworkContentListWindow::DrawDetails(), AIInfo::DummyConstructor(), CrashLog::FillCrashLog(), FormatBytes(), CrashLog::GamelogFillCrashLog(), NetworkAddress::GetAddressAsString(), AIScanner::GetAIConsoleLibraryList(), AIScanner::GetAIConsoleList(), DriverFactoryBase::GetDriversInfo(), GetFiosItem(), GetLanguageList(), BaseMedia< Tbase_set >::GetSetsList(), GRFBuildParamList(), HandleSavegameLoadCrash(), IniSaveSettings(), IsSameAI(), AIInstance::LoadCompatibilityScripts(), CrashLog::LogCompiler(), CrashLog::LogConfiguration(), CrashLogWindows::LogError(), CrashLogUnix::LogError(), CrashLogOSX::LogError(), CrashLog::LogGamelog(), CrashLog::LogLibraries(), CrashLogWindows::LogModules(), CrashLog::LogOpenTTDVersion(), CrashLogWindows::LogOSVersion(), CrashLogUnix::LogOSVersion(), CrashLogOSX::LogOSVersion(), CrashLogWindows::LogRegisters(), CrashLogWindows::LogStacktrace(), CrashLogUnix::LogStacktrace(), CrashLogOSX::LogStacktrace(), MakeIntList(), MakeManyOfMany(), MakeOneOfMany(), md5sumToString(), NetworkHTTPSocketHandler::NetworkHTTPSocketHandler(), NetworkAddress::Resolve(), SetFallbackFont(), ShowErrorMessage(), ShowHelp(), CrashLog::WriteCrashLog(), and CrashLog::WriteSavegame().

void str_validate ( char *  str,
const char *  last,
bool  allow_newlines,
bool  ignore 
)

Scans the string for valid characters and if it finds invalid ones, replaces them with a question mark '?' (if not ignored).

Parameters:
str the string to validate
last the last valid character of str
allow_newlines whether newlines should be allowed or ignored
ignore whether to ignore or replace with a question mark

Definition at line 186 of file string.cpp.

References Utf8Decode(), and Utf8EncodedCharLen().

Referenced by FiosFileScanner::AddFile(), FiosGetFileList(), GetFileTitle(), IConsolePrint(), Packet::Recv_string(), and SlString().

char* strecat ( char *  dst,
const char *  src,
const char *  last 
)

Appends characters from one string to another.

Appends the source string to the destination string with respect of the terminating null-character and and the last pointer to the last element in the destination buffer. If the last pointer is set to NULL no boundary check is performed.

Note:
usage: strecat(dst, src, lastof(dst));
lastof() applies only to fixed size arrays
Parameters:
dst The buffer containing the target string
src The buffer containing the string to append
last The pointer to the last element of the destination buffer
Returns:
The pointer to the terminating null-character in the destination buffer

Definition at line 117 of file string.cpp.

References strecpy().

Referenced by CloneVehicleName(), DoAutosave(), DrawRoadVehDetails(), GetDebugString(), GetFileTitle(), GetFullFilename(), KeycodeToString(), SaveKeycodes(), and IniFile::SaveToDisk().

char* strecpy ( char *  dst,
const char *  src,
const char *  last 
)

Copies characters from one buffer to another.

Copies the source string to the destination buffer with respect of the terminating null-character and the last pointer to the last element in the destination buffer. If the last pointer is set to NULL no boundary check is performed.

Note:
usage: strecpy(dst, src, lastof(dst));
lastof() applies only to fixed size arrays
Parameters:
dst The destination buffer
src The buffer containing the string to copy
last The pointer to the last element of the destination buffer
Returns:
The pointer to the terminating null-character in the destination buffer

Definition at line 145 of file string.cpp.

References DEBUG, and error().

Referenced by ScenarioScanner::AddFile(), FiosFileScanner::AddFile(), TarScanner::AddFile(), AI_CreateAIDummy(), CloneVehicleName(), DEF_UDP_RECEIVE_COMMAND(), DrawString(), DrawStringMultiLine(), ExtractTar(), FioFOpenFile(), FiosGetFileList(), FormatString(), GamelogRevision(), GenerateTownNameString(), NetworkAddress::GetAddressAsString(), GetFileTitle(), GetKeyboardLayout(), GRFBuildParamList(), IConsoleCopyInParams(), IniSaveSettings(), IsSameAI(), MakeAustrianTownName(), MakeCatalanTownName(), MakeCzechTownName(), MakeDanishTownName(), MakeDutchTownName(), MakeEnglishAdditionalTownName(), MakeEnglishOriginalTownName(), MakeFinnishTownName(), MakeFrenchTownName(), MakeGermanTownName(), MakeHungarianTownName(), MakeItalianTownName(), MakeNorwegianTownName(), MakePolishTownName(), MakeRomanianTownName(), MakeScreenshot(), MakeSillyTownName(), MakeSlovakTownName(), MakeSpanishTownName(), MakeSwedishTownName(), MakeSwissTownName(), MakeTurkishTownName(), NetworkAddChatMessage(), NetworkAddress::NetworkAddress(), NetworkFindBroadcastIPsInternal(), NetworkGameListHandleDelayedInsert(), NetworkSendCommand(), NetworkServerChangeClientName(), NetworkServerSetCompanyPassword(), NetworkUDPQueryServerThread(), SaveLoadWindow::OnClick(), NetworkContentDownloadStatusWindow::OnDownloadProgress(), NetworkStartServerWindow::OnKeyPress(), NetworkGameWindow::OnKeyPress(), AIDebugWindow::OnKeyPress(), CustomCurrencyWindow::OnQueryTextFinished(), NetworkStartServerWindow::OnQueryTextFinished(), ClientNetworkContentSocketHandler::OnReceiveData(), DriverFactoryBase::RegisterDriver(), NetworkAddress::Resolve(), IniFile::SaveToDisk(), FileScanner::Scan(), DriverFactoryBase::SelectDriver(), SetFallbackFont(), SignListWindow::SetFilterString(), ShowHelp(), ShowRefitOptionsList(), strecat(), CrashLog::WriteScreenshot(), and DriverFactoryBase::~DriverFactoryBase().

int strnatcmp ( const char *  s1,
const char *  s2 
)

Compares two strings using case insensitive natural sort.

Parameters:
s1 First string to compare.
s2 Second string to compare.
Returns:
Less than zero if s1 < s2, zero if s1 == s2, greater than zero if s1 > s2.

Definition at line 572 of file string.cpp.

References _current_collator, DRAW_STRING_BUFFER, and lengthof.

Referenced by CargoSpecNameSorter(), EngineNameSorter(), VehicleGroupWindow::GroupNameSorter(), IndustryDirectoryWindow::IndustryNameSorter(), IndustryTypeNameSorter(), NewGRFWindow::NameSorter(), NetworkContentListWindow::NameSorter(), NetworkGameWindow::NGameNameSorter(), SignList::SignNameSorter(), TownDirectoryWindow::TownNameSorter(), NetworkContentListWindow::TypeSorter(), and VehicleNameSorter().

void strtolower ( char *  str  ) 

Convert a given ASCII string to lowercase.

NOTE: only support ASCII characters, no UTF8 fancy. As currently the function is only used to lowercase data-filenames if they are not found, this is sufficient. If more, or general functionality is needed, look to r7271 where it was removed because it was broken when using certain locales: eg in Turkish the uppercase 'I' was converted to '?', so just revert to the old functionality

Parameters:
str string to convert

Definition at line 319 of file string.cpp.

Referenced by AIScanner::FindInfo(), FioFOpenFile(), AIScanner::ImportLibrary(), AIScanner::RegisterAI(), AIScanner::RegisterLibrary(), and SimplifyFileName().

bool StrValid ( const char *  str,
const char *  last 
)

Checks whether the given string is valid, i.e.

contains only valid (printable) characters and is properly terminated.

Parameters:
str The string to validate.
last The last character of the string, i.e. the string must be terminated here or earlier.

Definition at line 247 of file string.cpp.

References Utf8Decode(), and Utf8EncodedCharLen().

Referenced by LanguagePackHeader::IsValid().

void ttd_strlcat ( char *  dst,
const char *  src,
size_t  size 
)

Appends characters from one string to another.

Appends the source string to the destination string with respect of the terminating null-character and the maximum size of the destination buffer.

Note:
usage ttd_strlcat(dst, src, lengthof(dst));
lengthof() applies only to fixed size arrays
Parameters:
dst The buffer containing the target string
src The buffer containing the string to append
size The maximum size of the destination buffer

Definition at line 65 of file string.cpp.

References ttd_strlcpy().

Referenced by BuildWithFullPath(), AIInstance::LoadCompatibilityScripts(), and ScriptScanner::ScanDir().

void ttd_strlcpy ( char *  dst,
const char *  src,
size_t  size 
)

Copies characters from one buffer to another.

Copies the source string to the destination buffer with respect of the terminating null-character and the maximum size of the destination buffer.

Note:
usage ttd_strlcpy(dst, src, lengthof(dst));
lengthof() applies only to fixed size arrays
Parameters:
dst The destination buffer
src The buffer containing the string to copy
size The maximum size of the destination buffer

Definition at line 91 of file string.cpp.

Referenced by BuildWithFullPath(), AIScanner::FindInfo(), FioCreateDirectory(), ServerNetworkGameSocketHandler::GetClientName(), GetClipboardContents(), IConsoleHistoryNavigate(), IniLoadSettings(), AIController::LoadedLibrary(), mkpath(), NewGRFWindow::OnClick(), SaveLoadWindow::OnClick(), ScriptScanner::ScanDir(), SetSettingValue(), and ttd_strlcat().

size_t Utf8Decode ( WChar *  c,
const char *  s 
)

Decode and consume the next UTF-8 encoded character.

Parameters:
c Buffer to place decoded character.
s Character stream to retrieve character from.
Returns:
Number of characters in the sequence.

Definition at line 444 of file string.cpp.

References GB(), and HasBit().

Referenced by DrawString(), MoveTextBufferPos(), str_strip_colours(), str_validate(), StrValid(), and TranslateTTDPatchCodes().

size_t Utf8Encode ( char *  buf,
WChar  c 
)

Encode a unicode character and place it in the buffer.

Parameters:
buf Buffer to place character.
c Unicode character to encode.
Returns:
Number of characters in the encoded sequence.

Definition at line 484 of file string.cpp.

References GB().

Referenced by CheckForMissingGlyphsInLoadedLanguagePack(), CopyFromOldName(), DrawNewsString(), UnmappedChoiceList::Flush(), FormatString(), FS2OTTD(), InsertTextBufferChar(), and TranslateTTDPatchCodes().

size_t Utf8StringLength ( const char *  s  ) 

Get the length of an UTF-8 encoded string in number of characters and thus not the number of bytes that the encoded string contains.

Parameters:
s The string to get the length for.
Returns:
The length of the string in characters.

Definition at line 300 of file string.cpp.

Referenced by AISign::BuildSign(), CmdFoundTown(), CmdPlaceSign(), CmdRenameCompany(), CmdRenameDepot(), CmdRenameEngine(), CmdRenameGroup(), CmdRenamePresident(), CmdRenameSign(), CmdRenameStation(), CmdRenameTown(), CmdRenameVehicle(), CmdRenameWaypoint(), GenerateCompanyName(), GeneratePresidentName(), AIVehicle::SetName(), AISign::SetName(), AIGroup::SetName(), AICompany::SetName(), AIBaseStation::SetName(), and VerifyTownName().

size_t Utf8TrimString ( char *  s,
size_t  maxlen 
)

Properly terminate an UTF8 string to some maximum length.

Parameters:
s string to check if it needs additional trimming
maxlen the maximum length the buffer can have.
Returns:
the new length in bytes of the string (eg. strlen(new_string)) maxlen is the string length _INCLUDING_ the terminating ''

Definition at line 518 of file string.cpp.

References Utf8EncodedCharLen().

Referenced by NetworkAddChatMessage().

static int CDECL vseprintf ( char *  str,
const char *  last,
const char *  format,
va_list  ap 
) [static]

Safer implementation of vsnprintf; same as vsnprintf except:

  • last instead of size, i.e.

replace sizeof with lastof.

  • return gives the amount of characters added, not what it would add.
    Parameters:
    str buffer to write to up to last
    last last character we may write to
    format the formatting (see snprintf)
    ap the list of arguments for the format
    Returns:
    the number of added characters

Definition at line 44 of file string.cpp.

References min().

Referenced by seprintf().


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