QColor: clean up qcolor_p.h

Only qt_get_hex_rgb(const char*, QRgb*) is used outside qcolor.cpp
(in qxpmhandler.cpp), so remove all other function declarations from
qcolor_p.h, and make the functions file-static in qcolor.cpp, removing
their qt_ prefix to avoid confusion.

Exception: it turned out that qt_get_named_rgb(const char *, QRgb*)
wasn't actually used anywhere, but a follow-up commit will fix this.
Adjust interface to that of the QChar overload (add explicit int len).

Simplify conditional compilation of QT_NO_COLORNAMES: move the ifdef
inside get_colornames, to avoid duplicating the declaration, and
remove the empty implementation of get_named_rgb, since their use is
already conditional on QT_NO_COLORNAMES not being defined.

Change-Id: Iaf685dfbea0b9d3bd010448dac0e95be7b097ce5
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

src/gui/painting/qcolor.cpp

@@ -79,12 +79,12 @@ static inline int hex2int(char s)
     return h < 0 ? h : (h << 4) | h;
 }
 
-bool qt_get_hex_rgb(const char *name, QRgb *rgb)
+static bool get_hex_rgb(const char *name, int len, QRgb *rgb)
 {
     if (name[0] != '#')
         return false;
     name++;
-    int len = qstrlen(name);
+    --len;
     int a, r, g, b;
     a = 255;
     if (len == 12) {
@@ -119,15 +119,19 @@ bool qt_get_hex_rgb(const char *name, QRgb *rgb)
     return true;
 }
 
-bool qt_get_hex_rgb(const QChar *str, int len, QRgb *rgb)
+bool qt_get_hex_rgb(const char *name, QRgb *rgb)
+{
+    return get_hex_rgb(name, qstrlen(name), rgb);
+}
+
+static bool get_hex_rgb(const QChar *str, int len, QRgb *rgb)
 {
     if (len > 13)
         return false;
     char tmp[16];
     for (int i = 0; i < len; ++i)
         tmp[i] = str[i].toLatin1();
-    tmp[len] = 0;
-    return qt_get_hex_rgb(tmp, rgb);
+    return get_hex_rgb(tmp, len, rgb);
 }
 
 #ifndef QT_NO_COLORNAMES
@@ -309,7 +313,7 @@ inline bool operator<(const char *name, const RGBData &data)
 inline bool operator<(const RGBData &data, const char *name)
 { return qstrcmp(data.name, name) < 0; }
 
-static bool get_named_rgb(const char *name_no_space, QRgb *rgb)
+static bool get_named_rgb_no_space(const char *name_no_space, QRgb *rgb)
 {
     const RGBData *r = std::lower_bound(rgbTbl, rgbTbl + rgbTblSize, name_no_space);
     if ((r != rgbTbl + rgbTblSize) && !(name_no_space < *r)) {
@@ -319,9 +323,9 @@ static bool get_named_rgb(const char *name_no_space, QRgb *rgb)
     return false;
 }
 
-bool qt_get_named_rgb(const char *name, QRgb* rgb)
+#ifdef QCOLOR_THIS_IS_CURRENTLY_UNUSED_BUT_WILL_BE_USED_SOON
+static bool get_named_rgb(const char *name, int len, QRgb* rgb)
 {
-    int len = int(strlen(name));
     if (len > 255)
         return false;
     char name_no_space[256];
@@ -332,10 +336,11 @@ bool qt_get_named_rgb(const char *name, QRgb* rgb)
     }
     name_no_space[pos] = 0;
 
-    return get_named_rgb(name_no_space, rgb);
+    return get_named_rgb_no_space(name_no_space, rgb);
 }
+#endif
 
-bool qt_get_named_rgb(const QChar *name, int len, QRgb *rgb)
+static bool get_named_rgb(const QChar *name, int len, QRgb *rgb)
 {
     if (len > 255)
         return false;
@@ -346,32 +351,22 @@ bool qt_get_named_rgb(const QChar *name, int len, QRgb *rgb)
             name_no_space[pos++] = name[i].toLower().toLatin1();
     }
     name_no_space[pos] = 0;
-    return get_named_rgb(name_no_space, rgb);
+    return get_named_rgb_no_space(name_no_space, rgb);
 }
 
-QStringList qt_get_colornames()
+#endif // QT_NO_COLORNAMES
+
+static QStringList get_colornames()
 {
-    int i = 0;
     QStringList lst;
+#ifndef QT_NO_COLORNAMES
     lst.reserve(rgbTblSize);
-    for (i = 0; i < rgbTblSize; i++)
+    for (int i = 0; i < rgbTblSize; i++)
         lst << QLatin1String(rgbTbl[i].name);
+#endif
     return lst;
 }
 
-#else
-
-bool qt_get_named_rgb(const char *, QRgb*)
-{
-    return false;
-}
-
-QStringList qt_get_colornames()
-{
-    return QStringList();
-}
-#endif // QT_NO_COLORNAMES
-
 /*!
     \class QColor
     \brief The QColor class provides colors based on RGB, HSV or CMYK values.
@@ -911,7 +906,7 @@ bool QColor::setColorFromString(const QString &name)
 
     if (name.startsWith(QLatin1Char('#'))) {
         QRgb rgba;
-        if (qt_get_hex_rgb(name.constData(), name.length(), &rgba)) {
+        if (get_hex_rgb(name.constData(), name.length(), &rgba)) {
             setRgba(rgba);
             return true;
         } else {
@@ -922,7 +917,7 @@ bool QColor::setColorFromString(const QString &name)
 
 #ifndef QT_NO_COLORNAMES
     QRgb rgb;
-    if (qt_get_named_rgb(name.constData(), name.length(), &rgb)) {
+    if (get_named_rgb(name.constData(), name.length(), &rgb)) {
         setRgba(rgb);
         return true;
     } else
@@ -940,11 +935,7 @@ bool QColor::setColorFromString(const QString &name)
 */
 QStringList QColor::colorNames()
 {
-#ifndef QT_NO_COLORNAMES
-    return qt_get_colornames();
-#else
-    return QStringList();
-#endif
+    return get_colornames();
 }
 
 /*!

src/gui/painting/qcolor_p.h

@@ -53,15 +53,10 @@
 
 #include <QtGui/private/qtguiglobal_p.h>
 #include "QtGui/qrgb.h"
-#include "QtCore/qstringlist.h"
 
 QT_BEGIN_NAMESPACE
 
-bool qt_get_named_rgb(const char *, QRgb*);
-bool qt_get_named_rgb(const QChar *, int len, QRgb*);
 bool qt_get_hex_rgb(const char *, QRgb *);
-bool qt_get_hex_rgb(const QChar *, int len, QRgb *);
-QStringList qt_get_colornames();
 
 QT_END_NAMESPACE