htop/RichString.h
Explorer09 6dae8108f8 Introduce CLAMP macro. Unify all MIN(MAX(a,b),c) uses.
With the CLAMP macro replacing the combination of MIN and MAX, we will
have at least two advantages:
1. It's more obvious semantically.
2. There are no more mixes of confusing uses like MIN(MAX(a,b),c) and
   MAX(MIN(a,b),c) and MIN(a,MAX(b,c)) appearing everywhere. We unify
   the 'clamping' with a single macro.
Note that the behavior of this CLAMP macro is different from
the combination `MAX(low,MIN(x,high))`.
* This CLAMP macro expands to two comparisons instead of three from
  MAX and MIN combination. In theory, this makes the code slightly
  smaller, in case that (low) or (high) or both are computed at
  runtime, so that compilers cannot optimize them. (The third
  comparison will matter if (low)>(high); see below.)
* CLAMP has a side effect, that if (low)>(high) it will produce weird
  results. Unlike MIN & MAX which will force either (low) or (high) to
  win. No assertion of ((low)<=(high)) is done in this macro, for now.

This CLAMP macro is implemented like described in glib
<http://developer.gnome.org/glib/stable/glib-Standard-Macros.html>
and does not handle weird uses like CLAMP(a++, low++, high--) .
2016-01-15 20:26:01 +08:00

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2.8 KiB
C

/* Do not edit this file. It was automatically generated. */
#ifndef HEADER_RichString
#define HEADER_RichString
/*
htop - RichString.h
(C) 2004,2011 Hisham H. Muhammad
Released under the GNU GPL, see the COPYING file
in the source distribution for its full text.
*/
#define RICHSTRING_MAXLEN 350
#include "config.h"
#include <ctype.h>
#include <assert.h>
#ifdef HAVE_NCURSESW_CURSES_H
#include <ncursesw/curses.h>
#elif HAVE_NCURSES_NCURSES_H
#include <ncurses/ncurses.h>
#elif HAVE_NCURSES_CURSES_H
#include <ncurses/curses.h>
#elif HAVE_NCURSES_H
#include <ncurses.h>
#elif HAVE_CURSES_H
#include <curses.h>
#endif
#ifdef HAVE_LIBNCURSESW
#include <wctype.h>
#endif
#define RichString_size(this) ((this)->chlen)
#define RichString_sizeVal(this) ((this).chlen)
#define RichString_begin(this) RichString (this); memset(&this, 0, sizeof(RichString)); (this).chptr = (this).chstr;
#define RichString_beginAllocated(this) memset(&this, 0, sizeof(RichString)); (this).chptr = (this).chstr;
#define RichString_end(this) RichString_prune(&(this));
#ifdef HAVE_LIBNCURSESW
#define RichString_printVal(this, y, x) mvadd_wchstr(y, x, (this).chptr)
#define RichString_printoffnVal(this, y, x, off, n) mvadd_wchnstr(y, x, (this).chptr + off, n)
#define RichString_getCharVal(this, i) ((this).chptr[i].chars[0] & 255)
#define RichString_setChar(this, at, ch) do{ (this)->chptr[(at)] = (CharType) { .chars = { ch, 0 } }; } while(0)
#define CharType cchar_t
#else
#define RichString_printVal(this, y, x) mvaddchstr(y, x, (this).chptr)
#define RichString_printoffnVal(this, y, x, off, n) mvaddchnstr(y, x, (this).chptr + off, n)
#define RichString_getCharVal(this, i) ((this).chptr[i])
#define RichString_setChar(this, at, ch) do{ (this)->chptr[(at)] = ch; } while(0)
#define CharType chtype
#endif
typedef struct RichString_ {
int chlen;
CharType* chptr;
CharType chstr[RICHSTRING_MAXLEN+1];
} RichString;
#define charBytes(n) (sizeof(CharType) * (n))
#define RichString_setLen(this, len) do{ if(len < RICHSTRING_MAXLEN && this->chlen < RICHSTRING_MAXLEN) { RichString_setChar(this,len,0); this->chlen=len; } else RichString_extendLen(this,len); }while(0)
#ifdef HAVE_LIBNCURSESW
extern void RichString_setAttrn(RichString* this, int attrs, int start, int finish);
int RichString_findChar(RichString* this, char c, int start);
#else
void RichString_setAttrn(RichString* this, int attrs, int start, int finish);
int RichString_findChar(RichString* this, char c, int start);
#endif
void RichString_prune(RichString* this);
void RichString_setAttr(RichString* this, int attrs);
void RichString_append(RichString* this, int attrs, const char* data);
void RichString_appendn(RichString* this, int attrs, const char* data, int len);
void RichString_write(RichString* this, int attrs, const char* data);
#endif