UN PETIT PROGRAMME POUR LES CODES POSTAUX

#include <windows.h>
#include <tchar.h>
#include <commctrl.h>
#include <string.h>
#include "resource.h"

DWORD	CALLBACK vcp_seeker_thread_proc	(LPVOID param);
BOOL	CALLBACK vcp_dialog_proc		(HWND hWnd,UINT msg,WPARAM wp,LPARAM lp);

HANDLE sem;
BOOL the_end = FALSE;
TCHAR chaine[MAX_PATH];
HWND liste,bouto,dlg;
CRITICAL_SECTION cs;
HANDLE thread;

char tmp[MAX_PATH];
char* offset = tmp;
BOOL once = FALSE;
int vcp_count = 0;

struct vcp
{
	struct vcp* next;
	LPSTR ville;
	unsigned cp;
};

struct vcp *debut = NULL;

struct vcp* vcp_new()
{
	struct vcp*  n= (struct vcp*) malloc(sizeof(struct vcp));

	n->cp = 0;
	n->ville = NULL;
	n->next = NULL;

	return n;
}

void vcp_free(struct vcp** pp)
{
	free((*pp)->ville);
	free(*pp);
	*pp = NULL;
}

//unsigned vcp_load(struct vcp* p,HANDLE file)
unsigned vcp_load(struct vcp* p,char* o)
{
	CHAR buf[MAX_PATH];
	CHAR cc[2];
	char* r = o;

	cc[1] = 0;
	*buf = 0;

	do
	{
		//ReadFile(file,cc,1,&c,NULL);
		memcpy(cc,o,sizeof(CHAR));
		o += sizeof(CHAR);
		strcat(buf,cc);
	
	}while(*cc);

	p->ville = strdup(buf);

	//ReadFile(file,&p->cp,sizeof(unsigned),&c,NULL);
	memcpy(&p->cp,o,4);
	o += 4;

	//r += c;
	return o - r;
}

HANDLE WINAPI start_thread(LPTHREAD_START_ROUTINE lpfn,LPVOID param)
{
	DWORD id;
	return CreateThread(NULL,0,lpfn,param,0,&id);
}

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR cmdLine,int cmdShow)
{
	InitCommonControls();					// juste pour les themes de WinXP

	InitializeCriticalSection(&cs);			//le mutex
	sem = CreateSemaphore(NULL,0,1,NULL);	//le semaphore!

	//on donne la main au systeme pour la gestion des messages
	DialogBox(hInstance,MAKEINTRESOURCE(IDD_VCP),NULL,vcp_dialog_proc);


	//le systeme a rendu la main
	EnterCriticalSection(&cs);
	the_end = TRUE; // c'est fini, le thread va se terminer
	LeaveCriticalSection(&cs);

	ReleaseSemaphore(sem,1,NULL);			//on le reveil s'il dormait
	WaitForSingleObject(thread,INFINITE);	//on attend gentilement sa fin
	

	//fermeture en beaute de tout les objets
	CloseHandle(thread);
	CloseHandle(sem);
	DeleteCriticalSection(&cs);

	return 0;
}

LPCTSTR pluriel(unsigned int x)
{
	return (x > 1 ? _T("s"): _T(""));
}

void update_status(HWND hWnd,unsigned x)
{
	LPCTSTR msg = _T("%u ville%s trouvée%s");
	TCHAR buf[MAX_PATH];
	
	wsprintf(buf,msg,x, pluriel(x),pluriel(x));
	
	SetDlgItemText(hWnd,IDC_STATUS,buf);
}


void onTrouver(HWND hWnd)
{
	GetWindowText(GetDlgItem(hWnd,IDC_TEXTE),chaine,MAX_PATH);

	EnterCriticalSection(&cs);
		once = FALSE;
		SendMessage(liste,LB_RESETCONTENT,(WPARAM) 0,(LPARAM) 0);
		SendMessage(GetDlgItem(hWnd,IDC_TEXTE),(UINT) EM_SETSEL,(WPARAM) 0,(LPARAM) -1);
	LeaveCriticalSection(&cs);

	//on reveille la bete
	ReleaseSemaphore(sem,1,NULL);

}

void onInitDialog(HWND hWnd)
{
	HINSTANCE hInstance = (HINSTANCE) GetWindowLong(hWnd,GWL_HINSTANCE);

	SendMessage(hWnd,WM_SETICON,ICON_BIG,(LPARAM) LoadIcon(hInstance,MAKEINTRESOURCE(IDI_VCP)));
	
	//EnterCriticalSection(&cs);
	liste = GetDlgItem(hWnd,IDC_LISTE);
	bouto = GetDlgItem(hWnd,IDC_TROUVER);
	//LeaveCriticalSection(&cs);


	//on cree le thread qui s'endort aussitot (cf sa procedure)
	thread = start_thread(vcp_seeker_thread_proc,hWnd);
}

long onCommand(HWND hWnd,WPARAM wp,LPARAM lp)
{
	//boucle des messages des commandes principales
	switch(LOWORD(wp))
	{
	case IDC_TROUVER:
		onTrouver(hWnd);
		return 0;
	}
	return 1;
}

void onClose(HWND hWnd)
{
	struct vcp* n, *p;
	for(n = debut ; n != NULL ; n = p)
	{
		p = n->next;
		vcp_free(&n);
	}
	debut = NULL;
}

BOOL CALLBACK vcp_dialog_proc(HWND hWnd,UINT msg,WPARAM wp,LPARAM lp)
{
	//boucle des messages de la boite principal
	switch(msg)
	{
	case WM_INITDIALOG:
		dlg = hWnd;
		onInitDialog(hWnd);
		return TRUE;
	
	case WM_CLOSE:
		onClose(hWnd);
		PostQuitMessage(0);
		break;

	case WM_COMMAND:
		return onCommand(hWnd,wp,lp);
	}
	return FALSE;
}

void vcp_trouve(HWND hWnd)
{
	static LPCTSTR filtre = _T("%.05i - %s");
	TCHAR buf[MAX_PATH];
#ifdef UNICODE
	TCHAR v[MAX_PATH];
#endif
	struct vcp* i;
	unsigned po;
	int nb = 0;

	if(!*chaine) //il faut au moins une chaine non vide
	{
		MessageBeep(MB_ICONEXCLAMATION);
		return;
	}
	
#ifndef UNICODE
	po = strtoul(chaine,NULL,10);
#else
	po = wcstoul(chaine,NULL,10);
#endif

	for(i = debut ; i != NULL ; i = i->next)
	{
#ifdef UNICODE
		mbstowcs(v,i->ville,strlen(i->ville) + 1);
		wsprintf(buf,filtre,i->cp,(LPCTSTR) v);
#else
		wsprintf(buf,filtre,i->cp,(LPCTSTR) i->ville);
#endif

#ifdef UNICODE
		if(po == i->cp || po == i->cp/1000 || wcsstr(v,chaine))
#else
		if(po == i->cp || po == i->cp/1000 || strstr(i->ville,chaine))
#endif
		{
			if(!(++nb % 100))
				update_status(dlg,nb);

			SendMessage(liste,LB_ADDSTRING,0,(LPARAM) buf);
		}
	}
	update_status(dlg,nb);
}


// charge toute les donnees en memoire. sans blague!
DWORD CALLBACK vcp_browser_thread_proc(LPVOID param)
{
	HANDLE file = CreateFile(_T("vcp.bin"),GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,0,NULL);
	HANDLE map;
	struct vcp *c,*p;
	char* src, *offset;
	DWORD len;
	int nb = 0;

	if(file == INVALID_HANDLE_VALUE)
		return -1;

	if(!(map = CreateFileMapping(file,NULL,PAGE_READONLY,0,0,NULL)))
		return -2;

	if(!(src = (char*) MapViewOfFile(map,FILE_MAP_READ,0,0,0)))
		return -3;


	c = vcp_new();
	p = NULL;
	debut = c;

	offset = src;
	len = GetFileSize(file,NULL);

	while(offset < src + len)
	{
		offset += vcp_load(c,offset);
		
		if(!(++nb % 100))
			update_status(dlg,nb);

		p = c;
		c->next = vcp_new();
		c = c->next;
		vcp_count++;
	}

	update_status(dlg,nb);

	p->next = NULL;
	vcp_free(&c);

	UnmapViewOfFile(src);
	CloseHandle(map);
	CloseHandle(file);

	return 0;
}

DWORD CALLBACK vcp_seeker_thread_proc(LPVOID param)
{	
	HANDLE browser;
	
	//on demarre un thread pour le chargement
	//c'est superflue, mais tellement béau!
	
	EnableWindow(bouto,FALSE);
	//vcp_browser_thread_proc(NULL);
	browser = start_thread(vcp_browser_thread_proc,NULL);
	WaitForSingleObject(browser,INFINITE);
	//CloseHandle(browser);

	EnableWindow(bouto,TRUE);


	while(1) //boucle infini
	{
		if(the_end) //avant de se coucher on regarde si c'est pas la fin
			break;
		
		//on fait dodo jusqu'a qu'on nous sonne
		WaitForSingleObject(sem,INFINITE);

		if(the_end) //reveille trop tard? on s'arrache
			break;
		
		EnableWindow(bouto,FALSE);
		vcp_trouve((HWND) param);	//c'est parti!
		EnableWindow(bouto,TRUE);
			
	}

	return -1;
}

void __pfnBkCheck(void) {} //evite la boite de dialogue...

void _startup(void)
{
	int code;
	HINSTANCE hInstance;
	LPSTR cmdLine;
	STARTUPINFO i;

	i.cb = sizeof i;

	GetStartupInfo(&i);
	hInstance = GetModuleHandle(NULL);

	cmdLine = GetCommandLineA();

	InitCommonControls();
	code = WinMain(hInstance,NULL,cmdLine,SW_SHOW);

	ExitProcess(code);
}

Télécharger le zip

15 décembre 2004 16:00:30 :

J'ai simplement ajouter le code en clair sur la source. Pour le comprendre sans le télécharger.

19 décembre 2004 01:33:28 :

Correction du bug de lecture. Mise a jour mineur du code.

16 janvier 2005 23:59:27 :

Mise à jour mineur: toujours en C, amélioration du chargement (file mapping), libération de la mémoire à la fermeture, suppression de la barre de progression, gestion de l'unicode...