AntTweakBar's TwGetKeyCode SSCCE

main.cpp

#include <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#define _stricmp strcasecmp
#define _strdup strdup

typedef enum ETwKeyModifier
{
    TW_KMOD_NONE        = 0x0000,   // same codes as SDL keysym.mod
    TW_KMOD_SHIFT       = 0x0003,
    TW_KMOD_CTRL        = 0x00c0,
    TW_KMOD_ALT         = 0x0100,
    TW_KMOD_META        = 0x0c00
} TwKeyModifier;
typedef enum EKeySpecial
{
    TW_KEY_BACKSPACE    = '\b',
    TW_KEY_TAB          = '\t',
    TW_KEY_CLEAR        = 0x0c,
    TW_KEY_RETURN       = '\r',
    TW_KEY_PAUSE        = 0x13,
    TW_KEY_ESCAPE       = 0x1b,
    TW_KEY_SPACE        = ' ',
    TW_KEY_DELETE       = 0x7f,
    TW_KEY_UP           = 273,      // same codes and order as SDL 1.2 keysym.sym
    TW_KEY_DOWN,
    TW_KEY_RIGHT,
    TW_KEY_LEFT,
    TW_KEY_INSERT,
    TW_KEY_HOME,
    TW_KEY_END,
    TW_KEY_PAGE_UP,
    TW_KEY_PAGE_DOWN,
    TW_KEY_F1,
    TW_KEY_F2,
    TW_KEY_F3,
    TW_KEY_F4,
    TW_KEY_F5,
    TW_KEY_F6,
    TW_KEY_F7,
    TW_KEY_F8,
    TW_KEY_F9,
    TW_KEY_F10,
    TW_KEY_F11,
    TW_KEY_F12,
    TW_KEY_F13,
    TW_KEY_F14,
    TW_KEY_F15,
    TW_KEY_LAST
} TwKeySpecial;

bool TwGetKeyCode(int *_Code, int *_Modif, const char *_String)
{
    assert(_Code!=NULL && _Modif!=NULL);
    bool Ok = true;
    *_Modif = TW_KMOD_NONE;
    *_Code = 0;
    size_t Start = strlen(_String)-1;
    if( Start<0 )
        return false;
    while( Start>0 && _String[Start-1]!='+' )
        --Start;
    while( _String[Start]==' ' || _String[Start]=='\t' )
        ++Start;
    char *CodeStr = _strdup(_String+Start);
    for( size_t i=strlen(CodeStr)-1; i>=0; ++i )
        if( CodeStr[i]==' ' || CodeStr[i]=='\t' )
            CodeStr[i] = '\0';
        else
            break;


    /*
    if( strstr(_String, "SHIFT")!=NULL || strstr(_String, "shift")!=NULL )
        *_Modif |= TW_KMOD_SHIFT;
    if( strstr(_String, "CTRL")!=NULL || strstr(_String, "ctrl")!=NULL )
        *_Modif |= TW_KMOD_CTRL;
    if( strstr(_String, "META")!=NULL || strstr(_String, "meta")!=NULL )
        *_Modif |= TW_KMOD_META;

    if( strstr(_String, "ALTGR")!=NULL || strstr(_String, "altgr")!=NULL )
        ((void)(0));    // *_Modif |= TW_KMOD_ALTGR;
    else // ALT and ALTGR are exclusive
        if( strstr(_String, "ALT")!=NULL || strstr(_String, "alt")!=NULL )  
            *_Modif |= TW_KMOD_ALT;
    */
    char *up = _strdup(_String);
    // _strupr(up);
    for( char *upch=up; *upch!='\0'; ++upch )
        *upch = (char)toupper(*upch);
    if( strstr(up, "SHIFT")!=NULL )
        *_Modif |= TW_KMOD_SHIFT;
    if( strstr(up, "CTRL")!=NULL )
        *_Modif |= TW_KMOD_CTRL;
    if( strstr(up, "META")!=NULL )
        *_Modif |= TW_KMOD_META;

    if( strstr(up, "ALTGR")!=NULL )
        ((void)(0));    // *_Modif |= TW_KMOD_ALTGR;
    else // ALT and ALTGR are exclusive
        if( strstr(up, "ALT")!=NULL )   
            *_Modif |= TW_KMOD_ALT;
    free(up);

    if( strlen(CodeStr)==1 )
        *_Code = (unsigned char)(CodeStr[0]);
    else if( _stricmp(CodeStr, "backspace")==0 || _stricmp(CodeStr, "bs")==0 )
        *_Code = TW_KEY_BACKSPACE;
    else if( _stricmp(CodeStr, "tab")==0 )
        *_Code = TW_KEY_TAB;
    else if( _stricmp(CodeStr, "clear")==0 || _stricmp(CodeStr, "clr")==0 )
        *_Code = TW_KEY_CLEAR;
    else if( _stricmp(CodeStr, "return")==0 || _stricmp(CodeStr, "ret")==0 )
        *_Code = TW_KEY_RETURN;
    else if( _stricmp(CodeStr, "pause")==0 )
        *_Code = TW_KEY_PAUSE;
    else if( _stricmp(CodeStr, "escape")==0 || _stricmp(CodeStr, "esc")==0 )
        *_Code = TW_KEY_ESCAPE;
    else if( _stricmp(CodeStr, "space")==0 )
        *_Code = TW_KEY_SPACE;
    else if( _stricmp(CodeStr, "delete")==0 || _stricmp(CodeStr, "del")==0 )
        *_Code = TW_KEY_DELETE;
    /*
    else if( strlen(CodeStr)==4 && CodeStr[3]>='0' && CodeStr[3]<='9' && (strstr(CodeStr, "pad")==CodeStr || strstr(CodeStr, "PAD")==CodeStr) )
        *_Code = TW_KEY_PAD_0 + CodeStr[3]-'0';
    else if( _stricmp(CodeStr, "pad.")==0 )
        *_Code = TW_KEY_PAD_PERIOD;
    else if( _stricmp(CodeStr, "pad/")==0 )
        *_Code = TW_KEY_PAD_DIVIDE;
    else if( _stricmp(CodeStr, "pad*")==0 )
        *_Code = TW_KEY_PAD_MULTIPLY;
    else if( _stricmp(CodeStr, "pad+")==0 )
        *_Code = TW_KEY_PAD_PLUS;
    else if( _stricmp(CodeStr, "pad-")==0 )
        *_Code = TW_KEY_PAD_MINUS;
    else if( _stricmp(CodeStr, "padenter")==0 )
        *_Code = TW_KEY_PAD_ENTER;
    else if( _stricmp(CodeStr, "pad=")==0 )
        *_Code = TW_KEY_PAD_EQUALS;
    */
    else if( _stricmp(CodeStr, "up")==0 )
        *_Code = TW_KEY_UP;
    else if( _stricmp(CodeStr, "down")==0 )
        *_Code = TW_KEY_DOWN;
    else if( _stricmp(CodeStr, "right")==0 )
        *_Code = TW_KEY_RIGHT;
    else if( _stricmp(CodeStr, "left")==0 )
        *_Code = TW_KEY_LEFT;
    else if( _stricmp(CodeStr, "insert")==0 || _stricmp(CodeStr, "ins")==0 )
        *_Code = TW_KEY_INSERT;
    else if( _stricmp(CodeStr, "home")==0 )
        *_Code = TW_KEY_HOME;
    else if( _stricmp(CodeStr, "end")==0 )
        *_Code = TW_KEY_END;
    else if( _stricmp(CodeStr, "pgup")==0 )
        *_Code = TW_KEY_PAGE_UP;
    else if( _stricmp(CodeStr, "pgdown")==0 )
        *_Code = TW_KEY_PAGE_DOWN;
    else if( (strlen(CodeStr)==2 || strlen(CodeStr)==3) && (CodeStr[0]=='f' || CodeStr[0]=='F') )
    {
        int n = 0;
        if( sscanf(CodeStr+1, "%d", &n)==1 && n>0 && n<16 )
            *_Code = TW_KEY_F1 + n-1;
        else
            Ok = false;
    }

    free(CodeStr);
    return Ok;
}
 
int main() {
  int code = 0;
  int modif = 0;
  const char* string = "v";
  return TwGetKeyCode(&code, &modif, string);
}