dlls/richedit/charlist.c

   1 /*
   2  *
   3  *  Character List
   4  *
   5  *  Copyright (c) 2000 by Jean-Claude Batista
   6  *
   7  */
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stddef.h>
  12 #include <ctype.h>
  13 #include <stdlib.h>
  14 #include "charlist.h"
  15 #include "windows.h"
  16
  17 extern HANDLE RICHED32_hHeap;
  18
  19 void CHARLIST_Enqueue( CHARLIST* pCharList, char myChar )
  20 {
  21     CHARLISTENTRY* pNewEntry = HeapAlloc(RICHED32_hHeap, 0,sizeof(CHARLISTENTRY));
  22     pNewEntry->pNext = NULL;
  23     pNewEntry->myChar = myChar;
  24
  25     if(pCharList->pTail == NULL)
  26     {
  27          pCharList->pHead = pCharList->pTail = pNewEntry;
  28     }
  29     else
  30     {
  31          CHARLISTENTRY* pCurrent = pCharList->pTail;
  32          pCharList->pTail = pCurrent->pNext = pNewEntry;
  33     }
  34
  35     pCharList->nCount++;
  36 }
  37
  38 void CHARLIST_Push( CHARLIST* pCharList, char myChar)
  39 {
  40     CHARLISTENTRY* pNewEntry = malloc(sizeof(CHARLISTENTRY));
  41
  42     pNewEntry->myChar = myChar;
  43
  44     if(pCharList->pHead == NULL)
  45     {
  46          pCharList->pHead = pCharList->pTail = pNewEntry;
  47          pNewEntry->pNext = NULL;
  48
  49     }
  50     else
  51     {
  52          pNewEntry->pNext = pCharList->pHead;
  53          pCharList->pHead = pNewEntry;
  54     }
  55
  56     pCharList->nCount++;
  57 }
  58
  59 char CHARLIST_Dequeue(CHARLIST* pCharList)
  60 {
  61     CHARLISTENTRY* pCurrent;
  62     char myChar;
  63
  64     if(pCharList->nCount == 0)
  65       return 0;
  66
  67     pCharList->nCount--;
  68     myChar = pCharList->pHead->myChar;
  69     pCurrent = pCharList->pHead->pNext;
  70     HeapFree(RICHED32_hHeap, 0,pCharList->pHead);
  71
  72     if(pCharList->nCount == 0)
  73     {
  74         pCharList->pHead = pCharList->pTail = NULL;
  75     }
  76     else
  77     {
  78         pCharList->pHead = pCurrent;
  79     }
  80
  81     return myChar;
  82 }
  83
  84 int CHARLIST_GetNbItems(CHARLIST* pCharList)
  85 {
  86     return pCharList->nCount;
  87 }
  88
  89 void CHARLIST_FreeList(CHARLIST* pCharList){
  90     while(pCharList->nCount)
  91         CHARLIST_Dequeue(pCharList);
  92 }
  93
  94 /* this function count the number of occurences of a caracter */
  95 int CHARLIST_CountChar(CHARLIST* pCharList, char myChar)
  96 {
  97     CHARLISTENTRY *pCurrent;
  98     int nCount = 0;
  99
 100     for(pCurrent =pCharList->pHead ;pCurrent;pCurrent=pCurrent->pNext)
 101         if(pCurrent->myChar == myChar)
 102             nCount++;
 103
 104     return nCount;
 105 }
 106
 107 int CHARLIST_toBuffer(CHARLIST* pCharList, char* pBuffer, int nBufferSize)
 108 {
 109
 110    /* we add one to store a NULL caracter */
 111    if(nBufferSize < pCharList->nCount + 1)
 112         return pCharList->nCount;
 113
 114    for(;pCharList->nCount;pBuffer++)
 115        *pBuffer = CHARLIST_Dequeue(pCharList);
 116
 117    *pBuffer = '\0';
 118
 119    return 0;
 120 }
 121