commit 5077207088b08e6b21601cb19925d20e9d5af573
parent 7817523a685f0dbba2e074a448099558a54b1b9c
Author: arg@10ksloc.org <unknown>
Date: Fri, 4 Aug 2006 10:23:36 +0200
rearranged several stuff
Diffstat:
| M | LICENSE | | | 1 | + |
| M | config.mk | | | 2 | +- |
| M | dmenu.h | | | 29 | +++++++++-------------------- |
| M | draw.c | | | 184 | +++++++++++++++++++++++++++++++++++++------------------------------------------ |
| M | main.c | | | 256 | ++++++++++++++++++++++++++++++++++++++----------------------------------------- |
| M | util.c | | | 18 | ------------------ |
6 files changed, 220 insertions(+), 270 deletions(-)
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,7 @@
MIT/X Consortium License
(C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
+(C)opyright MMVI Sander van Dijk <a dot h dot vandijk at gmail dot com>
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
diff --git a/config.mk b/config.mk
@@ -1,4 +1,4 @@
-# dwm version
+# dmenu version
VERSION = 0.0
# Customize below to fit your system
diff --git a/dmenu.h b/dmenu.h
@@ -7,6 +7,8 @@
#include <X11/Xlib.h>
#include <X11/Xlocale.h>
+#define SPACE 30 /* px */
+
typedef struct Brush Brush;
typedef struct DC DC;
typedef struct Fnt Fnt;
@@ -29,30 +31,17 @@ struct DC { /* draw context */
GC gc;
};
-struct Brush {
- GC gc;
- Drawable drawable;
- int x, y, w, h;
- Fnt font;
- unsigned long bg;
- unsigned long fg;
- unsigned long border;
-};
-
-
+extern int screen;
+extern Display *dpy;
+extern DC dc;
/* draw.c */
-extern void draw(Display *dpy, Brush *b, Bool border, const char *text);
-extern void loadcolors(Display *dpy, int screen, Brush *b,
- const char *bg, const char *fg, const char *bo);
-extern void loadfont(Display *dpy, Fnt *font, const char *fontstr);
-extern unsigned int textnw(Fnt *font, char *text, unsigned int len);
-extern unsigned int textw(Fnt *font, char *text);
-extern unsigned int texth(Fnt *font);
+extern void drawtext(const char *text, Bool invert, Bool border);
+extern unsigned long getcolor(const char *colstr);
+extern void setfont(const char *fontstr);
+extern unsigned int textw(const char *text);
/* util.c */
extern void *emalloc(unsigned int size);
-extern void *emallocz(unsigned int size);
extern void eprint(const char *errstr, ...);
extern char *estrdup(const char *str);
-extern void swap(void **p1, void **p2);
diff --git a/draw.c b/draw.c
@@ -2,45 +2,62 @@
* (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*/
-
+#include "dmenu.h"
#include <stdio.h>
#include <string.h>
+#include <X11/Xlocale.h>
-#include "dmenu.h"
+/* static */
static void
-drawborder(Display *dpy, Brush *b)
+drawborder(void)
{
XPoint points[5];
- XSetLineAttributes(dpy, b->gc, 1, LineSolid, CapButt, JoinMiter);
- XSetForeground(dpy, b->gc, b->border);
- points[0].x = b->x;
- points[0].y = b->y;
- points[1].x = b->w - 1;
+
+ XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
+ XSetForeground(dpy, dc.gc, dc.border);
+ points[0].x = dc.x;
+ points[0].y = dc.y;
+ points[1].x = dc.w - 1;
points[1].y = 0;
points[2].x = 0;
- points[2].y = b->h - 1;
- points[3].x = -(b->w - 1);
+ points[2].y = dc.h - 1;
+ points[3].x = -(dc.w - 1);
points[3].y = 0;
points[4].x = 0;
- points[4].y = -(b->h - 1);
- XDrawLines(dpy, b->drawable, b->gc, points, 5, CoordModePrevious);
+ points[4].y = -(dc.h - 1);
+ XDrawLines(dpy, dc.drawable, dc.gc, points, 5, CoordModePrevious);
+}
+
+static unsigned int
+textnw(const char *text, unsigned int len)
+{
+ XRectangle r;
+
+ if(dc.font.set) {
+ XmbTextExtents(dc.font.set, text, len, NULL, &r);
+ return r.width;
+ }
+ return XTextWidth(dc.font.xfont, text, len);
}
+/* extern */
+
void
-draw(Display *dpy, Brush *b, Bool border, const char *text)
+drawtext(const char *text, Bool invert, Bool border)
{
- unsigned int x, y, w, h, len;
+ int x, y, w, h;
static char buf[256];
+ unsigned int len;
XGCValues gcv;
- XRectangle r = { b->x, b->y, b->w, b->h };
+ XRectangle r = { dc.x, dc.y, dc.w, dc.h };
- XSetForeground(dpy, b->gc, b->bg);
- XFillRectangles(dpy, b->drawable, b->gc, &r, 1);
+ XSetForeground(dpy, dc.gc, invert ? dc.fg : dc.bg);
+ XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
w = 0;
if(border)
- drawborder(dpy, b);
+ drawborder();
if(!text)
return;
@@ -51,121 +68,94 @@ draw(Display *dpy, Brush *b, Bool border, const char *text)
memcpy(buf, text, len);
buf[len] = 0;
- h = b->font.ascent + b->font.descent;
- y = b->y + (b->h / 2) - (h / 2) + b->font.ascent;
- x = b->x + (h / 2);
+ h = dc.font.ascent + dc.font.descent;
+ y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
+ x = dc.x + (h / 2);
/* shorten text if necessary */
- while(len && (w = textnw(&b->font, buf, len)) > b->w - h)
+ while(len && (w = textnw(buf, len)) > dc.w - h)
buf[--len] = 0;
- if(w > b->w)
+ if(w > dc.w)
return; /* too long */
- gcv.foreground = b->fg;
- gcv.background = b->bg;
- if(b->font.set) {
- XChangeGC(dpy, b->gc, GCForeground | GCBackground, &gcv);
- XmbDrawImageString(dpy, b->drawable, b->font.set, b->gc,
+ gcv.foreground = invert ? dc.bg : dc.fg;
+ gcv.background = invert ? dc.fg : dc.bg;
+ if(dc.font.set) {
+ XChangeGC(dpy, dc.gc, GCForeground | GCBackground, &gcv);
+ XmbDrawImageString(dpy, dc.drawable, dc.font.set, dc.gc,
x, y, buf, len);
}
else {
- gcv.font = b->font.xfont->fid;
- XChangeGC(dpy, b->gc, GCForeground | GCBackground | GCFont, &gcv);
- XDrawImageString(dpy, b->drawable, b->gc, x, y, buf, len);
+ gcv.font = dc.font.xfont->fid;
+ XChangeGC(dpy, dc.gc, GCForeground | GCBackground | GCFont, &gcv);
+ XDrawImageString(dpy, dc.drawable, dc.gc, x, y, buf, len);
}
}
-static unsigned long
-xloadcolors(Display *dpy, Colormap cmap, const char *colstr)
+unsigned long
+getcolor(const char *colstr)
{
+ Colormap cmap = DefaultColormap(dpy, screen);
XColor color;
+
XAllocNamedColor(dpy, cmap, colstr, &color, &color);
return color.pixel;
}
void
-loadcolors(Display *dpy, int screen, Brush *b,
- const char *bg, const char *fg, const char *border)
-{
- Colormap cmap = DefaultColormap(dpy, screen);
- b->bg = xloadcolors(dpy, cmap, bg);
- b->fg = xloadcolors(dpy, cmap, fg);
- b->border = xloadcolors(dpy, cmap, border);
-}
-
-unsigned int
-textnw(Fnt *font, char *text, unsigned int len)
-{
- XRectangle r;
- if(font->set) {
- XmbTextExtents(font->set, text, len, NULL, &r);
- return r.width;
- }
- return XTextWidth(font->xfont, text, len);
-}
-
-unsigned int
-textw(Fnt *font, char *text)
-{
- return textnw(font, text, strlen(text));
-}
-
-unsigned int
-texth(Fnt *font)
-{
- return font->height + 4;
-}
-
-void
-loadfont(Display *dpy, Fnt *font, const char *fontstr)
+setfont(const char *fontstr)
{
char **missing, *def;
- int n;
+ int i, n;
missing = NULL;
- def = "?";
setlocale(LC_ALL, "");
- if(font->set)
- XFreeFontSet(dpy, font->set);
- font->set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
+ if(dc.font.set)
+ XFreeFontSet(dpy, dc.font.set);
+ dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
if(missing) {
while(n--)
fprintf(stderr, "missing fontset: %s\n", missing[n]);
XFreeStringList(missing);
- if(font->set) {
- XFreeFontSet(dpy, font->set);
- font->set = NULL;
+ if(dc.font.set) {
+ XFreeFontSet(dpy, dc.font.set);
+ dc.font.set = NULL;
}
}
- if(font->set) {
+ if(dc.font.set) {
XFontSetExtents *font_extents;
XFontStruct **xfonts;
char **font_names;
- unsigned int i;
-
- font->ascent = font->descent = 0;
- font_extents = XExtentsOfFontSet(font->set);
- n = XFontsOfFontSet(font->set, &xfonts, &font_names);
- for(i = 0, font->ascent = 0, font->descent = 0; i < n; i++) {
- if(font->ascent < (*xfonts)->ascent)
- font->ascent = (*xfonts)->ascent;
- if(font->descent < (*xfonts)->descent)
- font->descent = (*xfonts)->descent;
+
+ dc.font.ascent = dc.font.descent = 0;
+ font_extents = XExtentsOfFontSet(dc.font.set);
+ n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
+ for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
+ if(dc.font.ascent < (*xfonts)->ascent)
+ dc.font.ascent = (*xfonts)->ascent;
+ if(dc.font.descent < (*xfonts)->descent)
+ dc.font.descent = (*xfonts)->descent;
xfonts++;
}
}
else {
- if(font->xfont)
- XFreeFont(dpy, font->xfont);
- font->xfont = NULL;
- font->xfont = XLoadQueryFont(dpy, fontstr);
- if (!font->xfont)
- font->xfont = XLoadQueryFont(dpy, "fixed");
- if (!font->xfont)
- eprint("error, cannot load 'fixed' font\n");
- font->ascent = font->xfont->ascent;
- font->descent = font->xfont->descent;
+ if(dc.font.xfont)
+ XFreeFont(dpy, dc.font.xfont);
+ dc.font.xfont = NULL;
+ dc.font.xfont = XLoadQueryFont(dpy, fontstr);
+ if (!dc.font.xfont)
+ dc.font.xfont = XLoadQueryFont(dpy, "fixed");
+ if (!dc.font.xfont)
+ eprint("error, cannot init 'fixed' font\n");
+ dc.font.ascent = dc.font.xfont->ascent;
+ dc.font.descent = dc.font.xfont->descent;
}
- font->height = font->ascent + font->descent;
+ dc.font.height = dc.font.ascent + dc.font.descent;
+}
+
+unsigned int
+textw(const char *text)
+{
+ return textnw(text, strlen(text)) + dc.font.height;
}
diff --git a/main.c b/main.c
@@ -16,74 +16,112 @@
#include <X11/keysym.h>
typedef struct Item Item;
-
struct Item {
Item *next; /* traverses all items */
Item *left, *right; /* traverses items matching current search pattern */
char *text;
};
-static Display *dpy;
-static Window root;
-static Window win;
-static Bool done = False;
-
-static Item *allitem = NULL; /* first of all items */
-static Item *item = NULL; /* first of pattern matching items */
-static Item *sel = NULL;
-static Item *nextoff = NULL;
-static Item *prevoff = NULL;
-static Item *curroff = NULL;
+/* static */
-static int screen, mx, my, mw, mh;
-static char *title = NULL;
-static char text[4096];
+static char *title, text[4096];
+static int mx, my, mw, mh;
static int ret = 0;
static int nitem = 0;
static unsigned int cmdw = 0;
static unsigned int tw = 0;
static unsigned int cw = 0;
-static const int seek = 30; /* 30px */
-
-static Brush brush = {0};
-
-static void draw_menu();
-static void kpress(XKeyEvent * e);
-
-static char version[] = "dmenu - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
+static Bool done = False;
+static Item *allitems = NULL; /* first of all items */
+static Item *item = NULL; /* first of pattern matching items */
+static Item *sel = NULL;
+static Item *next = NULL;
+static Item *prev = NULL;
+static Item *curr = NULL;
+static Window root;
+static Window win;
static void
-update_offsets()
+calcoffsets()
{
- unsigned int tw, w = cmdw + 2 * seek;
+ unsigned int tw, w;
- if(!curroff)
+ if(!curr)
return;
- for(nextoff = curroff; nextoff; nextoff=nextoff->right) {
- tw = textw(&brush.font, nextoff->text);
+ w = cmdw + 2 * SPACE;
+ for(next = curr; next; next=next->right) {
+ tw = textw(next->text);
if(tw > mw / 3)
tw = mw / 3;
- w += tw + brush.font.height;
+ w += tw;
if(w > mw)
break;
}
- w = cmdw + 2 * seek;
- for(prevoff = curroff; prevoff && prevoff->left; prevoff=prevoff->left) {
- tw = textw(&brush.font, prevoff->left->text);
+ w = cmdw + 2 * SPACE;
+ for(prev = curr; prev && prev->left; prev=prev->left) {
+ tw = textw(prev->left->text);
if(tw > mw / 3)
tw = mw / 3;
- w += tw + brush.font.height;
+ w += tw;
if(w > mw)
break;
}
}
static void
-update_items(char *pattern)
+drawmenu()
+{
+ Item *i;
+
+ dc.x = 0;
+ dc.y = 0;
+ dc.w = mw;
+ dc.h = mh;
+ drawtext(NULL, False, False);
+
+ /* print command */
+ if(!title || text[0]) {
+ cmdw = cw;
+ if(cmdw && item)
+ dc.w = cmdw;
+ drawtext(text, False, False);
+ }
+ else {
+ cmdw = tw;
+ dc.w = cmdw;
+ drawtext(title, False, False);
+ }
+ dc.x += dc.w;
+
+ if(curr) {
+ dc.w = SPACE;
+ drawtext((curr && curr->left) ? "<" : NULL, False, False);
+ dc.x += dc.w;
+
+ /* determine maximum items */
+ for(i = curr; i != next; i=i->right) {
+ dc.border = False;
+ dc.w = textw(i->text);
+ if(dc.w > mw / 3)
+ dc.w = mw / 3;
+ drawtext(i->text, sel == i, sel == i);
+ dc.x += dc.w;
+ }
+
+ dc.x = mw - SPACE;
+ dc.w = SPACE;
+ drawtext(next ? ">" : NULL, False, False);
+ }
+ XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
+ XFlush(dpy);
+}
+
+static void
+input(char *pattern)
{
- unsigned int plen = strlen(pattern);
+ unsigned int plen;
Item *i, *j;
if(!pattern)
@@ -94,10 +132,11 @@ update_items(char *pattern)
else
cmdw = tw;
+ plen = strlen(pattern);
item = j = NULL;
nitem = 0;
- for(i = allitem; i; i=i->next)
+ for(i = allitems; i; i=i->next)
if(!plen || !strncmp(pattern, i->text, plen)) {
if(!j)
item = i;
@@ -108,7 +147,7 @@ update_items(char *pattern)
j = i;
nitem++;
}
- for(i = allitem; i; i=i->next)
+ for(i = allitems; i; i=i->next)
if(plen && strncmp(pattern, i->text, plen)
&& strstr(i->text, pattern)) {
if(!j)
@@ -121,75 +160,19 @@ update_items(char *pattern)
nitem++;
}
- curroff = prevoff = nextoff = sel = item;
-
- update_offsets();
-}
-
-/* creates brush structs for brush mode drawing */
-static void
-draw_menu()
-{
- Item *i;
-
- brush.x = 0;
- brush.y = 0;
- brush.w = mw;
- brush.h = mh;
- draw(dpy, &brush, False, 0);
-
- /* print command */
- if(!title || text[0]) {
- cmdw = cw;
- if(cmdw && item)
- brush.w = cmdw;
- draw(dpy, &brush, False, text);
- }
- else {
- cmdw = tw;
- brush.w = cmdw;
- draw(dpy, &brush, False, title);
- }
- brush.x += brush.w;
-
- if(curroff) {
- brush.w = seek;
- draw(dpy, &brush, False, (curroff && curroff->left) ? "<" : 0);
- brush.x += brush.w;
-
- /* determine maximum items */
- for(i = curroff; i != nextoff; i=i->right) {
- brush.border = False;
- brush.w = textw(&brush.font, i->text);
- if(brush.w > mw / 3)
- brush.w = mw / 3;
- brush.w += brush.font.height;
- if(sel == i) {
- swap((void **)&brush.fg, (void **)&brush.bg);
- draw(dpy, &brush, True, i->text);
- swap((void **)&brush.fg, (void **)&brush.bg);
- }
- else
- draw(dpy, &brush, False, i->text);
- brush.x += brush.w;
- }
-
- brush.x = mw - seek;
- brush.w = seek;
- draw(dpy, &brush, False, nextoff ? ">" : 0);
- }
- XCopyArea(dpy, brush.drawable, win, brush.gc, 0, 0, mw, mh, 0, 0);
- XFlush(dpy);
+ curr = prev = next = sel = item;
+ calcoffsets();
}
static void
kpress(XKeyEvent * e)
{
- KeySym ksym;
char buf[32];
int num, prev_nitem;
- unsigned int i, len = strlen(text);
+ unsigned int i, len;
+ KeySym ksym;
+ len = strlen(text);
buf[0] = 0;
num = XLookupString(e, buf, sizeof(buf), &ksym, 0);
@@ -210,8 +193,8 @@ kpress(XKeyEvent * e)
case XK_U:
case XK_u:
text[0] = 0;
- update_items(text);
- draw_menu();
+ input(text);
+ drawmenu();
return;
break;
case XK_bracketleft:
@@ -224,24 +207,24 @@ kpress(XKeyEvent * e)
if(!(sel && sel->left))
return;
sel=sel->left;
- if(sel->right == curroff) {
- curroff = prevoff;
- update_offsets();
+ if(sel->right == curr) {
+ curr = prev;
+ calcoffsets();
}
break;
case XK_Tab:
if(!sel)
return;
strncpy(text, sel->text, sizeof(text));
- update_items(text);
+ input(text);
break;
case XK_Right:
if(!(sel && sel->right))
return;
sel=sel->right;
- if(sel == nextoff) {
- curroff = nextoff;
- update_offsets();
+ if(sel == next) {
+ curr = next;
+ calcoffsets();
}
break;
case XK_Return:
@@ -265,9 +248,9 @@ kpress(XKeyEvent * e)
prev_nitem = nitem;
do {
text[--i] = 0;
- update_items(text);
+ input(text);
} while(i && nitem && prev_nitem == nitem);
- update_items(text);
+ input(text);
}
break;
default:
@@ -277,14 +260,14 @@ kpress(XKeyEvent * e)
strncat(text, buf, sizeof(text));
else
strncpy(text, buf, sizeof(text));
- update_items(text);
+ input(text);
}
}
- draw_menu();
+ drawmenu();
}
static char *
-read_allitems()
+readinput()
{
static char *maxname = NULL;
char *p, buf[1024];
@@ -306,7 +289,7 @@ read_allitems()
new->next = new->left = new->right = NULL;
new->text = p;
if(!i)
- allitem = new;
+ allitems = new;
else
i->next = new;
i = new;
@@ -315,21 +298,27 @@ read_allitems()
return maxname;
}
+/* extern */
+
+int screen;
+Display *dpy;
+DC dc = {0};
+
int
main(int argc, char *argv[])
{
- int i;
- XSetWindowAttributes wa;
char *maxname;
+ int i;
XEvent ev;
+ XSetWindowAttributes wa;
/* command line args */
for(i = 1; i < argc; i++) {
if (argv[i][0] == '-')
switch (argv[i][1]) {
case 'v':
- fprintf(stdout, "%s", version);
- exit(0);
+ fputs("dmenu-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
+ exit(EXIT_SUCCESS);
break;
case 't':
if(++i < argc) {
@@ -350,7 +339,7 @@ main(int argc, char *argv[])
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
- maxname = read_allitems();
+ maxname = readinput();
/* grab as early as possible, but after reading all items!!! */
while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
@@ -358,8 +347,10 @@ main(int argc, char *argv[])
usleep(1000);
/* style */
- loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
- loadfont(dpy, &brush.font, FONT);
+ dc.bg = getcolor(BGCOLOR);
+ dc.fg = getcolor(FGCOLOR);
+ dc.border = getcolor(BORDERCOLOR);
+ setfont(FONT);
wa.override_redirect = 1;
wa.background_pixmap = ParentRelative;
@@ -367,28 +358,25 @@ main(int argc, char *argv[])
mx = my = 0;
mw = DisplayWidth(dpy, screen);
- mh = texth(&brush.font);
+ mh = dc.font.height + 4;
win = XCreateWindow(dpy, root, mx, my, mw, mh, 0,
DefaultDepth(dpy, screen), CopyFromParent,
DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
XDefineCursor(dpy, win, XCreateFontCursor(dpy, XC_xterm));
- XFlush(dpy);
/* pixmap */
- brush.gc = XCreateGC(dpy, root, 0, 0);
- brush.drawable = XCreatePixmap(dpy, win, mw, mh,
- DefaultDepth(dpy, screen));
- XFlush(dpy);
+ dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
+ dc.gc = XCreateGC(dpy, root, 0, 0);
if(maxname)
- cw = textw(&brush.font, maxname) + brush.font.height;
+ cw = textw(maxname);
if(cw > mw / 3)
cw = mw / 3;
if(title) {
- tw = textw(&brush.font, title) + brush.font.height;
+ tw = textw(title);
if(tw > mw / 3)
tw = mw / 3;
}
@@ -396,10 +384,10 @@ main(int argc, char *argv[])
cmdw = title ? tw : cw;
text[0] = 0;
- update_items(text);
+ input(text);
XMapRaised(dpy, win);
- draw_menu();
- XFlush(dpy);
+ drawmenu();
+ XSync(dpy, False);
/* main event loop */
while(!done && !XNextEvent(dpy, &ev)) {
@@ -409,7 +397,7 @@ main(int argc, char *argv[])
break;
case Expose:
if(ev.xexpose.count == 0)
- draw_menu();
+ drawmenu();
break;
default:
break;
@@ -417,8 +405,8 @@ main(int argc, char *argv[])
}
XUngrabKeyboard(dpy, CurrentTime);
- XFreePixmap(dpy, brush.drawable);
- XFreeGC(dpy, brush.gc);
+ XFreePixmap(dpy, dc.drawable);
+ XFreeGC(dpy, dc.gc);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
diff --git a/util.c b/util.c
@@ -29,16 +29,6 @@ emalloc(unsigned int size)
return res;
}
-void *
-emallocz(unsigned int size)
-{
- void *res = calloc(1, size);
-
- if(!res)
- bad_malloc(size);
- return res;
-}
-
void
eprint(const char *errstr, ...)
{
@@ -58,11 +48,3 @@ estrdup(const char *str)
bad_malloc(strlen(str));
return res;
}
-
-void
-swap(void **p1, void **p2)
-{
- void *tmp = *p1;
- *p1 = *p2;
- *p2 = tmp;
-}
