Wicri:Dilib, module Buffer, interface BufferFormat

Le type BufferFormat est un outil pour générer des chaînes à partir d'un format (type printf).

Maquette

Code source

/*   -*- coding: utf-8 -*-  */
#include "Buffer.h"
#include <string.h>
/* a insérer dans Buffer.h */
struct BufferFormatMemoryStruct
{
  Buffer **bufArray;
  Buffer *result;
  char    escapeChar;
};

typedef struct BufferFormatMemoryStruct BufferFormatMemory;

BufferFormatMemory* NewBufferFormatMemory();
char *BufferFormatMemorySet(BufferFormatMemory* mem1, char c1, char *str);
char *BufferFormatMemoryGet(BufferFormatMemory* mem1, char c1);

/* a créer BufferFormat.o (lib) */

BufferFormatMemory* NewBufferFormatMemory()
{
   BufferFormatMemory *memory;
   int i;

   memory = (BufferFormatMemory *) malloc(sizeof(BufferFormatMemory));
   memory->bufArray=(Buffer **)malloc(sizeof(Buffer*)*16*4);  
         /* char *[4 * 16] ; for 4 lines of ascii char */
   for (i=0 ; i<=63 ; i++) memory->bufArray[i]=NULL;
   memory->escapeChar='%';
   memory->result=NewBuffer();
   return memory;
}

char *BufferFormatMemorySet(BufferFormatMemory* mem1, char c1, char *str)
{
   int i;
   i=c1-'@';    /* bufArray[0] is for ascii char '@'  */
   if (! mem1->bufArray[i]) mem1->bufArray[i]=NewBuffer();
   BufferStrcpy(mem1->bufArray[i], str);
   return BufferString(mem1->bufArray[i]);
}

char *BufferFormatMemoryGet(BufferFormatMemory* mem1, char c1)
{
   int i;
   i=c1-'@'; 
   if (mem1->bufArray[i]) return BufferString(mem1->bufArray[i]);
   return NULL;
}

char *BufferFormatEval(BufferFormatMemory *mem1,  char *f1)
{
   char *evalPos;
   char *memStr;
   char *escapePos;

   evalPos=f1;
   BufferReset (mem1->result);
   
   while ((escapePos=strchr(evalPos, mem1->escapeChar)))
      {
          BufferStrncat(mem1->result, evalPos, escapePos-evalPos);
          if ((memStr=BufferFormatMemoryGet(mem1, escapePos[1]))) BufferStrcat( mem1->result, memStr);
          else BufferStrcat( mem1->result, "*** null***");
          evalPos=escapePos+2;
      }
   BufferStrcat(mem1->result, evalPos);
   return BufferString (mem1->result);
}

/* zone test  (non regression ? )*/
int main()
{
BufferFormatMemory *mem1;
char c;
mem1 = NewBufferFormatMemory();
BufferFormatMemorySet(mem1, 'c', "Paris");
printf("%s\n", BufferFormatMemoryGet(mem1, 'c'));
BufferFormatMemorySet(mem1, 'p', "France");
printf("%s\n", BufferFormatEval(mem1, "Pays :"));
printf("%s\n", BufferFormatEval(mem1, "Pays : %p"));
printf("%s\n", BufferFormatEval(mem1, "Pays : %p ;"));
printf("%s\n", BufferFormatEval(mem1, "Pays : %p ; capitale %c."));

}

Importation

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Compilation

gcc testBufferFormat.c $DILIB_CC -o testBufferFormat

Test

Pour visualiser la liste d'entrée

./testBufferFormat