diff options
| -rw-r--r-- | xlib/xcolors.c | 148 |
1 files changed, 63 insertions, 85 deletions
diff --git a/xlib/xcolors.c b/xlib/xcolors.c index 70ab3cb..66591c7 100644 --- a/xlib/xcolors.c +++ b/xlib/xcolors.c @@ -14,11 +14,14 @@ #include "tkInt.h" /* - * Index array. For each of the characters 'a'-'y', this table gives the first color - * starting with that character in the xColors table. + * Index array. For each of the characters 'a'-'y', this table gives the first + * color starting with that character in the xColors table. */ -static const unsigned char az[] = {0, 5, 13, 21, 45, 46, 50, 60, 62, 65, 66, - 67, 91, 106, 109, 115, 126, 127, 130, 144, 149, 150, 152, 155, 156, 158}; + +static const unsigned char az[] = { + 0, 5, 13, 21, 45, 46, 50, 60, 62, 65, 66, + 67, 91, 106, 109, 115, 126, 127, 130, 144, 149, 150, 152, 155, 156, 158 +}; /* * Define an array that defines the mapping from color names to RGB values. @@ -241,15 +244,17 @@ static const elem xColors[] = { * None. * *---------------------------------------------------------------------- + * + * This only handles hex-strings without 0x prefix. Luckily, that's just what + * we need. */ -#if defined(__WIN32__) && !defined(__CYGWIN__) -# ifdef NO_STRTOI64 -/* This version only handles hex-strings without 0x prefix */ -static __int64 -_strtoi64(const char *spec, char **p, int base) +static Tcl_WideInt +parseHex64bit( + const char *spec, + char **p) { - __int64 result = 0; + Tcl_WideInt result = 0; char c; while ((c = *spec)) { if ((c >= '0') && (c <= '9')) { @@ -267,16 +272,18 @@ _strtoi64(const char *spec, char **p, int base) *p = (char *) spec; return result; } -# endif -#else -# define _strtoi64 strtoll -#endif -static int colorcmp(const char *spec, const char *pname, int *special) { +static int +colorcmp( + const char *spec, + const char *pname, + int *special) +{ int r; int c, d; int notequal = 0; int num = 0; + do { d = *pname++; c = (*spec == ' '); @@ -286,9 +293,12 @@ static int colorcmp(const char *spec, const char *pname, int *special) { if ((unsigned)(d - 'A') <= (unsigned)('Z' - 'A')) { d += 'a' - 'A'; } else if (c) { - /* A space doesn't match a lowercase, but we don't know - * yet whether we should return a negative or positive - * number. That depends on what follows. */ + /* + * A space doesn't match a lowercase, but we don't know yet + * whether we should return a negative or positive number. That + * depends on what follows. + */ + notequal = 1; } c = *spec++; @@ -305,19 +315,24 @@ static int colorcmp(const char *spec, const char *pname, int *special) { } } r = c - d; - } while(!r && d); + } while (!r && d); + if (!r && notequal) { - /* Strings are equal, but difference in spacings only. We should still - * report not-equal, so "burly wood" is not a valid color */ + /* + * Strings are equal, but difference in spacings only. We should still + * report not-equal, so "burly wood" is not a valid color. + */ + r = 1; } *special = num; return r; } -#define RED(p) ((unsigned char)(p)[0]) -#define GREEN(p) ((unsigned char)(p)[1]) -#define BLUE(p) ((unsigned char)(p)[2]) +#define RED(p) ((unsigned char) (p)[0]) +#define GREEN(p) ((unsigned char) (p)[1]) +#define BLUE(p) ((unsigned char) (p)[2]) +#define US(expr) ((unsigned short) (expr)) Status XParseColor( @@ -328,42 +343,44 @@ XParseColor( { if (spec[0] == '#') { char *p; - Tcl_WideInt value = _strtoi64(++spec, &p, 16); + Tcl_WideInt value = parseHex64bit(++spec, &p); switch ((int)(p-spec)) { case 3: - colorPtr->red = (unsigned short) (((value >> 8) & 0xf) * 0x1111); - colorPtr->green = (unsigned short) (((value >> 4) & 0xf) * 0x1111); - colorPtr->blue = (unsigned short) ((value & 0xf) * 0x1111); + colorPtr->red = US(((value >> 8) & 0xf) * 0x1111); + colorPtr->green = US(((value >> 4) & 0xf) * 0x1111); + colorPtr->blue = US((value & 0xf) * 0x1111); break; case 6: - colorPtr->red = (unsigned short) (((value >> 16) & 0xff) | ((value >> 8) & 0xff00)); - colorPtr->green = (unsigned short) (((value >> 8) & 0xff) | (value & 0xff00)); - colorPtr->blue = (unsigned short) ((value & 0xff) | (value << 8)); + colorPtr->red = US(((value >> 16) & 0xff) | ((value >> 8) & 0xff00)); + colorPtr->green = US(((value >> 8) & 0xff) | (value & 0xff00)); + colorPtr->blue = US((value & 0xff) | (value << 8)); break; case 9: - colorPtr->red = (unsigned short) (((value >> 32) & 0xf) | ((value >> 20) & 0xfff0)); - colorPtr->green = (unsigned short) (((value >> 20) & 0xf) | ((value >> 8) & 0xfff0)); - colorPtr->blue = (unsigned short) (((value >> 8) & 0xf) | (value << 4)); + colorPtr->red = US(((value >> 32) & 0xf) | ((value >> 20) & 0xfff0)); + colorPtr->green = US(((value >> 20) & 0xf) | ((value >> 8) & 0xfff0)); + colorPtr->blue = US(((value >> 8) & 0xf) | (value << 4)); break; case 12: - colorPtr->red = (unsigned short) (value >> 32); - colorPtr->green = (unsigned short) (value >> 16); - colorPtr->blue = (unsigned short) value; + colorPtr->red = US(value >> 32); + colorPtr->green = US(value >> 16); + colorPtr->blue = US(value); break; default: return 0; } } else { - int size, num; - const elem *p; - const char *q; /* * Perform a binary search on the sorted array of colors. * size = current size of search range * p = pointer to current element being considered. */ + + int size, num; + const elem *p; + const char *q; int r = (spec[0] - 'A') & 0xdf; + if (r >= (int) sizeof(az) - 1) { return 0; } @@ -386,11 +403,15 @@ XParseColor( r = colorcmp(spec + 1, *p, &num); } if (num > (*p)[31]) { - if (((*p)[31] != 8) || num > 100) + if (((*p)[31] != 8) || num > 100) { return 0; + } num = (num * 255 + 50) / 100; if ((num == 230) || (num == 128)) { - /* Those two entries have a deviation i.r.t the table */ + /* + * Those two entries have a deviation i.r.t the table. + */ + num--; } num |= (num << 8); @@ -408,49 +429,6 @@ XParseColor( return 1; } - -#if 0 -int main() { - XColor color; - char buf[32]; - int charindex; - int i, result; - int repeat = 1; - int num, maxnum; - char *end; - - while (repeat--) { - buf[0] = 'a'; - charindex = 1; - for (i = 0; i < sizeof(xColors)/sizeof(xColors[0]); ++i) { - while (i >= az[charindex]) { - ++charindex; - ++(buf[0]); - } - strcpy(buf + 1, xColors[i]); - end = buf + strlen(buf); - num = 0; - result = XParseColor(0, 0, buf, &color); - printf("%3d %3d %3d\t\t%s\n", color.red >> 8, color.green >> 8, color.blue >> 8, buf); - maxnum = xColors[i][31]; - if (maxnum == 8) maxnum = 100; - while (result && ++num <= maxnum) { - sprintf(end, "%d", num); - result = XParseColor(0, 0, buf, &color); - printf("%3d %3d %3d\t\t%s\n", color.red >> 8, color.green >> 8, color.blue >> 8, buf); - } - if (!result) { - break; - } - } - } - if (!result) { - printf("NOT OK: %s\n", buf); - } else { - printf("OK\n"); - } -} -#endif /* * Local Variables: * mode: c |