146 lines
4.7 KiB
C
146 lines
4.7 KiB
C
/*
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This is some code to handle a stack of NeXus files. This is used to implement
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external linking within the NeXus-API
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Copyright (C) 1997-2006 Mark Koennecke
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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For further information, see <http://www.nexusformat.org>
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Added code to support the path stack for NXgetpath,
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Mark Koennecke, October 2009
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <napi.h>
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#include "nxstack.h"
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/*-----------------------------------------------------------------------
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Data definitions
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---------------------------------------------------------------------*/
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typedef struct {
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pNexusFunction pDriver;
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NXlink closeID;
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char filename[1024];
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}fileStackEntry;
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typedef struct __fileStack {
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int fileStackPointer;
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fileStackEntry fileStack[MAXEXTERNALDEPTH];
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int pathPointer;
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char pathStack[NXMAXSTACK][NX_MAXNAMELEN];
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}fileStack;
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/*---------------------------------------------------------------------*/
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pFileStack makeFileStack(){
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pFileStack pNew = NULL;
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pNew = (pFileStack)malloc(sizeof(fileStack));
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if(pNew == NULL){
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return NULL;
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}
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memset(pNew,0,sizeof(fileStack));
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pNew->fileStackPointer = -1;
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pNew->pathPointer = -1;
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return pNew;
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}
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/*---------------------------------------------------------------------*/
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void killFileStack(pFileStack self){
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if(self != NULL){
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free(self);
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}
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}
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/*---------------------------------------------------------------------*/
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int getFileStackSize(){
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return sizeof(fileStack);
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}
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/*----------------------------------------------------------------------*/
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void pushFileStack(pFileStack self, pNexusFunction pDriv, char *file){
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size_t length;
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self->fileStackPointer++;
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self->fileStack[self->fileStackPointer].pDriver = pDriv;
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memset(&self->fileStack[self->fileStackPointer].closeID,0,sizeof(NXlink));
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length = strlen(file);
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if(length >= 1024){
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length = 1023;
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}
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memcpy(&self->fileStack[self->fileStackPointer].filename,file,length);
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}
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/*----------------------------------------------------------------------*/
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void popFileStack(pFileStack self){
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self->fileStackPointer--;
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if(self->fileStackPointer < -1){
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self->fileStackPointer = -1;
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}
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}
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/*----------------------------------------------------------------------*/
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pNexusFunction peekFileOnStack(pFileStack self){
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return self->fileStack[self->fileStackPointer].pDriver;
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}
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/*---------------------------------------------------------------------*/
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char *peekFilenameOnStack(pFileStack self){
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return self->fileStack[self->fileStackPointer].filename;
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}
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/*----------------------------------------------------------------------*/
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void peekIDOnStack(pFileStack self, NXlink *id){
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memcpy(id, &self->fileStack[self->fileStackPointer].closeID, sizeof(NXlink));
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}
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/*---------------------------------------------------------------------*/
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void setCloseID(pFileStack self, NXlink id){
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memcpy(&self->fileStack[self->fileStackPointer].closeID, &id, sizeof(NXlink));
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}
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/*----------------------------------------------------------------------*/
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int fileStackDepth(pFileStack self){
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return self->fileStackPointer;
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}
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/*----------------------------------------------------------------------*/
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void pushPath(pFileStack self, const char *name){
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self->pathPointer++;
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strncpy(self->pathStack[self->pathPointer],name,NX_MAXNAMELEN-1);
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}
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/*-----------------------------------------------------------------------*/
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void popPath(pFileStack self){
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self->pathPointer--;
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if(self->pathPointer < -1){
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self->pathPointer = -1;
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}
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}
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/*-----------------------------------------------------------------------*/
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int buildPath(pFileStack self, char *path, int pathlen){
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int i;
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size_t totalPathLength;
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char *totalPath;
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for(i = 0, totalPathLength = 5; i <= self->pathPointer; i++){
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totalPathLength += strlen(self->pathStack[i]) + 1;
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}
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totalPath = (char*)malloc(totalPathLength*sizeof(char));
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if(totalPath == NULL){
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return 0;
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}
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memset(totalPath,0,totalPathLength*sizeof(char));
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for(i = 0; i <= self->pathPointer; i++){
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strcat(totalPath,"/");
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strcat(totalPath,self->pathStack[i]);
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}
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strncpy(path,totalPath,pathlen-1);
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free(totalPath);
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return 1;
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}
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