direct.c

DOS下Editor的源代码

/* ---------- direct.c --------- */

#include "dflat.h"

#ifndef BCPP
#define FA_DIREC 0x10
#endif

static char path[MAXPATH];
static char drive[MAXDRIVE] = " :";
static char dir[MAXDIR];
static char name[MAXFILE];
static char ext[MAXEXT];

/* ----- Create unambiguous path from file spec, filling in the
     drive and directory if incomplete. Optionally change to
     the new drive and subdirectory ------ */
void CreatePath(char *spath,char *fspec,int InclName,int Change)
{
    int cm = 0;
    unsigned currdrive;
    char currdir[MAXPATH+1];
    char *cp;

    if (!Change)    {
        /* ---- save the current drive and subdirectory ---- */
        currdrive = getdisk();
        getcwd(currdir, sizeof currdir);
        memmove(currdir, currdir+2, strlen(currdir+1));
        cp = currdir+strlen(currdir)-1;
        if (*cp == '\\')
            *cp = '\0';
    }
    *drive = *dir = *name = *ext = '\0';
    fnsplit(fspec, drive, dir, name, ext);
    if (!InclName)
        *name = *ext = '\0';
    *drive = toupper(*drive);
    if (*ext)
        cm |= EXTENSION;
    if (InclName && *name)
        cm |= FILENAME;
    if (*dir)
        cm |= DIRECTORY;
    if (*drive)
        cm |= DRIVE;
    if (cm & DRIVE)
        setdisk(*drive - 'A');
    else     {
        *drive = getdisk();
        *drive += 'A';
    }
    if (cm & DIRECTORY)    {
        cp = dir+strlen(dir)-1;
        if (*cp == '\\')
            *cp = '\0';
        chdir(dir);
    }
    getcwd(dir, sizeof dir);
    memmove(dir, dir+2, strlen(dir+1));
    if (InclName)    {
        if (!(cm & FILENAME))
            strcpy(name, "*");
        if (!(cm & EXTENSION) && strchr(fspec, '.') != NULL)
            strcpy(ext, ".*");
    }
    else
        *name = *ext = '\0';
    if (dir[strlen(dir)-1] != '\\')
        strcat(dir, "\\");
	if (spath != NULL)
    	fnmerge(spath, drive, dir, name, ext);
    if (!Change)    {
        setdisk(currdrive);
        chdir(currdir);
    }
}

static int dircmp(const void *c1, const void *c2)
{
    return stricmp(*(char **)c1, *(char **)c2);
}

static BOOL BuildList(WINDOW wnd, char *fspec, BOOL dirs)
{
    int ax, i = 0, criterr = 1;
    struct ffblk ff;
    CTLWINDOW *ct = FindCommand(wnd->extension,
							dirs ? ID_DIRECTORY : ID_FILES,LISTBOX);
    WINDOW lwnd;
    char **dirlist = NULL;

    if (ct != NULL)    {
        lwnd = ct->wnd;
        SendMessage(lwnd, CLEARTEXT, 0, 0);

       	while (criterr == 1)    {
           	ax = findfirst(fspec, &ff, dirs ? FA_DIREC: 0);
           	criterr = TestCriticalError();
       	}
       	if (criterr)
           	return FALSE;
        while (ax == 0)    {
			if (!dirs || (ff.ff_attrib & FA_DIREC) && strcmp(ff.ff_name, "."))	{
	            dirlist = DFrealloc(dirlist, sizeof(char *)*(i+1));
    	        dirlist[i] = DFmalloc(strlen(ff.ff_name)+1);
        	    strcpy(dirlist[i++], ff.ff_name);
			}
            ax = findnext(&ff);
        }
        if (dirlist != NULL)    {
            int j;
            /* -- sort file or directory list box data -- */
            qsort(dirlist, i, sizeof(void *), dircmp);
            /* ---- send sorted list to list box ---- */
            for (j = 0; j < i; j++)    {
                SendMessage(lwnd,ADDTEXT,(PARAM)dirlist[j],0);
                free(dirlist[j]);
            }
            free(dirlist);
		}
        SendMessage(lwnd, SHOW_WINDOW, 0, 0);
    }
	return TRUE;
}

BOOL BuildFileList(WINDOW wnd, char *fspec)
{
	return BuildList(wnd, fspec, FALSE);
}

void BuildDirectoryList(WINDOW wnd)
{
	BuildList(wnd, "*.*", TRUE);
}

void BuildDriveList(WINDOW wnd)
{
    CTLWINDOW *ct = FindCommand(wnd->extension, ID_DRIVE,LISTBOX);
    if (ct != NULL)    {
	    union REGS regs;
	    char drname[15];
	    unsigned int cd, dr;
	    WINDOW lwnd = ct->wnd;
        SendMessage(lwnd, CLEARTEXT, 0, 0);

    	cd = getdisk();
    	for (dr = 0; dr < 26; dr++)    {
        	unsigned ndr;
        	setdisk(dr);
        	ndr = getdisk();
        	if (ndr == dr)    {
            	/* ----- test for remapped B drive ----- */
            	if (dr == 1)    {
                	regs.x.ax = 0x440e; /* IOCTL func 14 */
                	regs.h.bl = dr+1;
                	int86(DOS, &regs, &regs);
                	if (regs.h.al != 0)
                    	continue;
            	}

            	sprintf(drname, "%c:", dr+'A');

            	/* ---- test for network or RAM disk ---- */
            	regs.x.ax = 0x4409;     /* IOCTL func 9 */
            	regs.h.bl = dr+1;
            	int86(DOS, &regs, &regs);
            	if (!regs.x.cflag)    {
                	if (regs.x.dx & 0x1000)
                    	strcat(drname, " (Net)");
                	else if (regs.x.dx == 0x0800)
                    	strcat(drname, " (RAM)");
            	}
            	SendMessage(lwnd,ADDTEXT,(PARAM)drname,0);
        	}
    	}
        SendMessage(lwnd, SHOW_WINDOW, 0, 0);
    	setdisk(cd);
	}
}

void BuildPathDisplay(WINDOW wnd)
{
    CTLWINDOW *ct = FindCommand(wnd->extension, ID_PATH,TEXT);
	if (ct != NULL)	{
		int len;
	    WINDOW lwnd = ct->wnd;
		CreatePath(path, "*.*", FALSE, FALSE);
		len = strlen(path);
		if (len > 3)
			path[len-1] = '\0';
       	SendMessage(lwnd,SETTEXT,(PARAM)path,0);
        SendMessage(lwnd, PAINT, 0, 0);
	}
}