Initial revision

ifile.c

@@ -0,0 +1,227 @@
+/*--------------------------------------------------------------------------
+	Configuration file management.
+	The configuration file has one entry:
+	name = value 
+	per line
+	
+
+
+	Mark Koennecke,    October 1996
+
+	Copyright:
+
+	Labor fuer Neutronenstreuung
+	Paul Scherrer Institut
+	CH-5423 Villigen-PSI
+
+
+        The authors hereby grant permission to use, copy, modify, distribute,
+        and license this software and its documentation for any purpose, provided
+        that existing copyright notices are retained in all copies and that this
+        notice is included verbatim in any distributions. No written agreement,
+        license, or royalty fee is required for any of the authorized uses.
+        Modifications to this software may be copyrighted by their authors
+        and need not follow the licensing terms described here, provided that
+        the new terms are clearly indicated on the first page of each file where
+        they apply.
+
+        IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
+        FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+        ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
+        DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
+        POSSIBILITY OF SUCH DAMAGE.
+
+        THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
+        INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
+        FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE
+        IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE
+        NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
+        MODIFICATIONS.
+----------------------------------------------------------------------------*/
+#include "fortify.h"
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include "ifile.h"
+
+/*====================== Locals ============================================*/
+
+  static IPair *CreateNewEntry(char *name, char *val, IPair *pN)
+  {
+     IPair *pRes;
+     
+     pRes = (IPair *)malloc(sizeof(IPair));
+     if(!pRes)
+         return NULL;
+     if(name)
+        pRes->name = strdup(name);
+     if(val)
+     	pRes->value = strdup(val);
+     pRes->pNext = pN;
+     return pRes;
+  }
+/*--------------------------------------------------------------------------*/
+ static void RemoveWhiteSpace(char *pText)
+ {
+    int i, ii, i3;
+    char *pPtr;
+      
+    assert(pText);
+    
+    /* find start */
+    i = 0;
+    while(isspace(pText[i]))
+    {
+      i++;
+    }     
+    
+    /* find end */
+    ii = strlen(pText);
+    ii--;
+    while( (isspace(pText[ii])) || (pText[ii] == '\n') )
+    {
+      ii--;
+    }    
+    
+    /* copy it */
+    pPtr = pText;
+    for(i3 = i; i3 < (ii+1); i3++)
+    {
+      *pPtr = pText[i3];
+      pPtr++;
+    }
+    *pPtr = '\0';
+ }
+/*===========================================================================*/
+  IPair *IFReadConfigFile(FILE *fd)
+  {
+     IPair *pList = NULL;
+     char pBueffel[256];
+     char pName[132];
+     char pValue[132];
+     char *pPos;
+     int iLen;
+     
+     assert(fd);
+     
+     while(!feof(fd))
+     {
+        fgets(pBueffel,255,fd);
+        if(feof(fd))
+          continue;
+
+        pPos = strchr(pBueffel,'=');
+        if(!pPos)
+           continue;
+        if(pBueffel[0] == '#')
+           continue;
+        
+        iLen = pPos - pBueffel;
+        strncpy(pName,pBueffel,iLen);
+        pName[iLen] = '\0';
+        strcpy(pValue,(pPos+1));
+        RemoveWhiteSpace(pName);
+        RemoveWhiteSpace(pValue);
+        pList = CreateNewEntry(pName,pValue,pList);
+        if(!pList)
+           return NULL;
+     }
+     return pList;
+  }
+/*--------------------------------------------------------------------------*/
+  char *IFindOption(IPair *pList, char *name)
+  {
+     IPair *pCurrent;
+  
+     if(!pList)
+     {
+       return NULL;
+     }
+     
+     pCurrent = pList;
+     while(pCurrent)
+     {
+        if(strcmp(name,pCurrent->name) == 0)
+           return pCurrent->value;
+        pCurrent = pCurrent->pNext;   
+     }
+     return NULL;
+  }  
+/*--------------------------------------------------------------------------*/
+  IPair *IFAddOption(IPair *pList,char *name, char *value)
+  {
+  	return CreateNewEntry(name,value,pList);
+  }
+/*-------------------------------------------------------------------------*/
+
+ int IFSaveOptions(IPair *pList,FILE *fd)
+ {
+    IPair *pCurrent;
+    
+    assert(fd);
+    assert(pList);
+    
+    pCurrent = pList;
+    while(pCurrent)
+    {
+       fprintf(fd,"%s = %s \n", pCurrent->name, pCurrent->value);
+       pCurrent = pCurrent->pNext;
+    }
+    return 1;
+ }
+/*--------------------------------------------------------------------------*/
+
+  void IFDeleteOptions(IPair *pList)
+  {
+    IPair *pCurrent, *pTemp;
+    
+    pCurrent = pList;
+    while(pCurrent)
+    {
+      pTemp = pCurrent->pNext;
+      if(pCurrent->name)
+      {
+         free(pCurrent->name);
+      }
+      if(pCurrent->value)
+      {
+         free(pCurrent->value);
+      }
+      free(pCurrent);
+      pCurrent = pTemp;
+    }
+  }
+/*===========================================================================
+	Testcode: Define MAIN to activate it. Needs a file test.txt
+	as input
+*/
+
+#ifdef MAIN
+  int main(int argc, char *argv[])
+  {
+     FILE *fd;
+     IPair *pList = NULL;
+     char *pPos = NULL;
+     
+     fd = fopen("test.txt","r");
+     if(!fd)
+        exit(2);
+     
+        
+     pList = IFReadConfigFile(fd);
+     if(!pList)
+       exit(2);
+     fclose(fd);
+       
+     pPos = IFindOption(pList,"Gabi");
+     if(pPos)
+             puts(pPos);
+     
+     fd = fopen("lala.txt","w");
+     IFSaveOptions(pList,fd);
+     IFDeleteOptions(pList);     
+     
+  }
+#endif
+