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/* Copyright INRIA/ENPC */
/*********************************
* Link version for SYSV machine
*********************************/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <windows.h>
#include "../stack-def.h"
#ifdef round
#undef round
#endif
#define round(x,s) (((x) + ((s)-1)) & ~((s)-1))
#define Min(x,y) (((x)<(y))?(x):(y))
#define Max(x,y) (((x)>(y))?(x):(y))
#define debug C2F(iop).ddt==1
extern char *strchr();
static void Sci_Delsym __PARAMS((int ));
static int Sci_dlopen __PARAMS((char *loaded_files[],int global));
static int Sci_dlsym __PARAMS((char *ename,int ishared,char * strf));
/*************************************
* New version : link entry names
* from new shared lib created with
* files.
* -1 : the shared archive was not loaded
* -5 : pb with one of the entry point
*************************************/
void SciLink(iflag,rhs,ilib,files,en_names,strf)
int iflag,*ilib,*rhs;
char *files[],*en_names[],*strf;
{
int i;
if ( iflag == 0 )
{
if ( * rhs == 1 )
/* if no entry names are given we try a dl_open with global option*/
*ilib = Sci_dlopen(files,1);
else
*ilib = Sci_dlopen(files,0);
}
if (*ilib == -1 ) return;
if ( iflag == 0) sciprint("shared archive loaded\r\n");
if ( *rhs >= 2)
{
i=0 ;
while ( en_names[i] != (char *) 0)
{
if ( Sci_dlsym(en_names[i],*ilib,strf) == FAIL)
*ilib=-5;
i++;
}
}
}
/**************************************
* return 1 if link accepts multiple file iin one call
* or 0 elsewhere
*************************************/
int LinkStatus()
{
return(1);
}
/**************************************
* Unlink a shared lib
*************************************/
void C2F(isciulink)(i)
integer *i;
{
Sci_Delsym(*i);
}
/*************************************
* This routine
* load a shared archive and call dlopen (here LoadLibrary)
* the shared lib handler is stored in a Table
* The return value is == -1 if the dlopen failed
*
* How to deal with global On Windows ? XXXXXX
*************************************/
int Sci_dlopen( char *loaded_files[], int global)
{
static HINSTANCE hd1 = NULL;
int i;
/** XXXXX **/
int count =0;
while ( loaded_files[count] != NULL) count++;
if ( count != 1 )
{
sciprint("link: first argument must be a unique dll name\r\n");
}
hd1 = LoadLibrary (loaded_files[0]);
if ( hd1 == NULL )
{
sciprint("link failed for dll %s\r\n",loaded_files[0]);
return(-1);
}
for ( i = 0 ; i < Nshared ; i++ )
{
if ( hd[i].ok == FAIL)
{
hd[i].shl = (unsigned long)hd1;
hd[i].ok = OK;
return(i);
}
}
if ( Nshared == ENTRYMAX )
{
sciprint("You can't open shared files maxentry %d reached\r\n",ENTRYMAX);
return(FAIL);
}
hd[Nshared].shl = (unsigned long)hd1;
hd[Nshared].ok = OK;
Nshared ++;
return(Nshared-1);
}
/*************************************
* This routine load the entryname ename
* from shared lib ishared
*************************************/
int Sci_dlsym(ename,ishared,strf)
int ishared;
char *ename;
char *strf;
{
HINSTANCE hd1 = NULL;
int ish = Min(Max(0,ishared),ENTRYMAX-1);
char enamebuf[MAXNAME];
if ( strf[0] == 'f' )
Underscores(1,ename,enamebuf);
else
Underscores(0,ename,enamebuf);
/* lookup the address of the function to be called */
if ( NEpoints == ENTRYMAX )
{
sciprint("You can't link more functions maxentry %d reached\r\n",ENTRYMAX);
return(FAIL);
}
if ( hd[ish].ok == FAIL )
{
sciprint("Shared lib %d does not exists\r\n",ish);
return(FAIL);
}
/** entry was previously loaded **/
if ( SearchFandS(ename,ish) >= 0 )
{
sciprint("Entry name %s is already loaded from lib %d\r\n",ename,ish);
return(OK);
}
hd1 = (HINSTANCE) hd[ish].shl;
EP[NEpoints].epoint = (function) GetProcAddress (hd1,enamebuf);
if ( EP[NEpoints].epoint == NULL )
{
sciprint("%s is not an entry point \r\n",enamebuf);
return(FAIL);
}
else
{
/* we don't add the _ in the table */
if (debug) sciprint("Linking %s \r\n",ename);
strncpy(EP[NEpoints].name,ename,MAXNAME);
EP[NEpoints].Nshared = ish;
NEpoints++;
}
return(OK);
}
/***************************************************
* Delete entry points associated with shared lib ishared
* then delete the shared lib
****************************************************/
void Sci_Delsym( ishared)
int ishared;
{
int ish = Min(Max(0,ishared),ENTRYMAX-1);
int i=0;
for ( i = NEpoints-1 ; i >=0 ; i--)
{
if ( EP[i].Nshared == ish )
{
int j;
for ( j = i ; j <= NEpoints - 2 ; j++ )
{
EP[j].epoint = EP[j+1].epoint;
EP[j].Nshared = EP[j+1].Nshared;
strcpy(EP[j].name,EP[j+1].name);
}
NEpoints--;
}
}
if ( hd[ish].ok != FAIL)
{
FreeLibrary ((HINSTANCE) hd[ish].shl);
hd[ish].ok = FAIL;
}
}
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