reactos/base/shell/cmd/strtoclr.c

274 lines
5.2 KiB
C
Raw Normal View History

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