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287 lines
4 KiB
C
287 lines
4 KiB
C
/*
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* STRTOCLR.C - read color (for color command and other)
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*
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*
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* History:
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*
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* 07-Oct-1999 (Paolo Pantaleo)
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* Started.
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*
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*
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*/
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/*only
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BOOL StringToColor(LPWORD lpColor, LPTSTR*str)
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is to be called
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other are internal service functions*/
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#include "cmd.h"
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#include <ctype.h>
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#include <tchar.h>
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#define _B FOREGROUND_BLUE
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#define _G FOREGROUND_GREEN
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#define _R FOREGROUND_RED
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#define _I FOREGROUND_INTENSITY
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/*return values for chop_blank*/
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#define CP_OK 0
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#define CP_BLANK_NOT_FOUND 1
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#define CP_END_OF_STRING 2
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#define SC_HEX 0x0100
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#define SC_TXT 0x0200
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typedef struct _CLRTABLE
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{
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LPTSTR name;
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WORD val;
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} CLRTABLE;
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CLRTABLE clrtable[] =
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{
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{"bla" ,0 },
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{"blu" ,_B },
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{"gre" ,_G },
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{"cya" ,_B|_G },
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{"red" ,_R },
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{"mag" ,_B|_R },
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{"yel" ,_R|_G },
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{"whi" ,_R|_G|_B },
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{"gra" ,_I },
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{"0" ,0 },
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{"2" ,_G },
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{"3" ,_B|_G },
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{"4" ,_R },
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{"5" ,_B|_R },
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{"6" ,_R|_G },
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{"7" ,_R|_G|_B },
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{"8" ,_I },
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{"9" ,_I|_B },
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{"10" ,_I|_G },
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{"11" ,_I|_B|_G },
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{"12" ,_I|_R },
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{"13" ,_I|_B|_R },
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{"14" ,_I|_R|_G },
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{"15" ,_I|_R|_G|_B},
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/* note that 1 is at the end of list
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to avoid to confuse it with 10-15*/
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{"1" ,_B },
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/*cyan synonimous*/
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{"aqu" ,_B|_G },
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/*magenta synonimous*/
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{"pur" ,_B|_R },
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{"" ,0},
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};
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/*
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move string pointer to next word (skip all spaces)
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on erro retunr nonzero value
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*/
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static
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INT chop_blank(LPTSTR *arg_str)
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{
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LPTSTR str;
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str = _tcschr(*arg_str,_T(' '));
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if(!str)
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{
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str = _tcschr (*arg_str, _T('\0'));
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if(str != NULL)
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*arg_str=str;
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return CP_BLANK_NOT_FOUND;
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}
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while(_istspace(*str))
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str++;
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if (*str == _T('\0'))
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{
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*arg_str=str;
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return CP_END_OF_STRING;
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}
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*arg_str = str;
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return CP_OK;
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}
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/*
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read a color value in hex (like win nt's cmd syntax)
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if an error occurs return -1
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*/
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static
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WORD hex_clr(LPTSTR str)
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{
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WORD ret= (WORD)-1;
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TCHAR ch;
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ch = str[1];
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if(_istdigit(ch))
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ret = ch-_T('0');
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else
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{
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ch=_totupper(ch);
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if( ch >= _T('A') && ch <= _T('F') )
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ret = ch-_T('A')+10;
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else
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return (WORD)-1;
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}
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ch = str[0];
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if(_istdigit(ch))
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ret |= (ch-_T('0')) << 4;
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else
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{
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ch=_totupper(ch);
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if( ch >= _T('A') && ch <= _T('F') )
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ret |= (ch-_T('A')+10) <<4;
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else
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return (WORD)-1;
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}
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return ret;
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}
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/*
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read a color value from a string (like 4nt's syntax)
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if an error occurs return -1
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*/
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static
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WORD txt_clr(LPTSTR str)
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{
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INT i;
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for(i=0;*(clrtable[i].name);i++)
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if( _tcsnicmp(str,clrtable[i].name,_tcslen(clrtable[i].name)) == 0)
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return clrtable[i].val;
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return (WORD)-1;
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}
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/*search for x on y*/
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static
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WORD str_to_color(LPTSTR* arg_str)
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{
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LPTSTR str;
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BOOL bBri=FALSE;
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WORD tmp_clr,ret_clr;
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str = *arg_str;
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if(!(*str))
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return (WORD)-1;
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/*foreground*/
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if(_tcsnicmp(str,"bri",3) == 0 )
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{
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bBri = TRUE;
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if(chop_blank(&str))
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return (WORD)-1;
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}
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if( (tmp_clr = txt_clr(str)) == (WORD)-1 )
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{
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return (WORD)-1;
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}
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/*skip spaces and "on"*/
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if ( chop_blank(&str) || chop_blank(&str) )
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return (WORD)-1;
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ret_clr = tmp_clr | (bBri << 3);
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/*background*/
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if(_tcsnicmp(str,"bri",3) == 0 )
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{
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bBri = TRUE;
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if(chop_blank(&str))
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return (WORD)-1;
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}
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if( (tmp_clr = txt_clr(str)) == (WORD)-1 )
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return (WORD)-1;
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chop_blank(&str);
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*arg_str = str;
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return SC_HEX | ret_clr | tmp_clr << 4 | bBri << 7;
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}
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/****main function****/
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/*
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the only parameter is arg_str, a pointer to a string.
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the string is modified so it will begin to first word after
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color specification
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(only the char* is moved, no chars in the string are modfied)
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it returns the color in the l.o. byte, plus two flags in the
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h.o. byte, they are:
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SC_HEX win nt's cmd syntax (for exampl a0)
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SC_TXT 4nt's syntax ( "bri gre on bla" or "10 on 0")
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if succedes also move the LPTSTR to end of
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string that specify color
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*/
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BOOL StringToColor(LPWORD lpColor, LPTSTR*str)
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{
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WORD wRet;
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wRet = str_to_color (str);
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if (wRet == (WORD)-1)
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{
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wRet=hex_clr (*str);
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chop_blank (str);
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if (wRet == (WORD)-1)
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return FALSE;
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}
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*lpColor = wRet;
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return TRUE;
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}
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/* EOF */ |