typedef struct tagHISTORY
{
- struct tagHISTORY *prev;
- struct tagHISTORY *next;
- LPTSTR string;
+ struct tagHISTORY *prev;
+ struct tagHISTORY *next;
+ LPTSTR string;
} HIST_ENTRY, * LPHIST_ENTRY;
-static INT size,
- max_size=100;
+static INT size, max_size = 100;
+static LPHIST_ENTRY Top = NULL;
+static LPHIST_ENTRY Bottom = NULL;
-
-static LPHIST_ENTRY Top;
-static LPHIST_ENTRY Bottom;
-
-
-static LPHIST_ENTRY curr_ptr=0;
-
+static LPHIST_ENTRY curr_ptr = NULL;
VOID InitHistory(VOID);
VOID History_move_to_bottom(VOID);
-VOID History (INT dir, LPTSTR commandline);
+VOID History(INT dir, LPTSTR commandline);
VOID CleanHistory(VOID);
VOID History_del_current_entry(LPTSTR str);
VOID set_size(INT new_size);
-
-INT CommandHistory (LPTSTR param)
+INT CommandHistory(LPTSTR param)
{
- LPTSTR tmp;
- INT tmp_int;
- LPHIST_ENTRY h_tmp;
- TCHAR szBuffer[2048];
-
- tmp=_tcschr(param,_T('/'));
-
- if (tmp)
- {
- param=tmp;
- switch (_totupper(param[1]))
- {
- case _T('F'):/*delete history*/
- CleanHistory();InitHistory();
- break;
-
- case _T('R'):/*read history from standard in*/
- //hIn=GetStdHandle (STD_INPUT_HANDLE);
-
- for(;;)
- {
- ConInString(szBuffer,sizeof(szBuffer)/sizeof(TCHAR));
- if (*szBuffer!=_T('\0'))
- History(0,szBuffer);
- else
- break;
- }
- break;
-
- case _T('A'):/*add an antry*/
- History(0,param+2);
- break;
-
- case _T('S'):/*set history size*/
- if ((tmp_int=_ttoi(param+2)))
- set_size(tmp_int);
- break;
-
- default:
- return 1;
- }
- }
- else
- {
- for (h_tmp = Top->prev; h_tmp != Bottom; h_tmp = h_tmp->prev)
- ConErrPuts(h_tmp->string);
- }
- return 0;
+ LPTSTR tmp;
+ INT tmp_int;
+ LPHIST_ENTRY h_tmp;
+ TCHAR szBuffer[2048];
+
+ tmp=_tcschr(param,_T('/'));
+
+ if (tmp)
+ {
+ param=tmp;
+ switch (_totupper(param[1]))
+ {
+ case _T('F'):/*delete history*/
+ CleanHistory();InitHistory();
+ break;
+
+ case _T('R'):/*read history from standard in*/
+ for(;;)
+ {
+ ConInString(szBuffer,sizeof(szBuffer)/sizeof(TCHAR));
+ if (*szBuffer!=_T('\0'))
+ History(0,szBuffer);
+ else
+ break;
+ }
+ break;
+
+ case _T('A'):/*add an antry*/
+ History(0,param+2);
+ break;
+
+ case _T('S'):/*set history size*/
+ if ((tmp_int=_ttoi(param+2)))
+ set_size(tmp_int);
+ break;
+
+ default:
+ return 1;
+ }
+ }
+ else
+ {
+ for (h_tmp = Top->prev; h_tmp != Bottom; h_tmp = h_tmp->prev)
+ ConErrPuts(h_tmp->string);
+ }
+ return 0;
}
VOID set_size(INT new_size)
{
- while (new_size<size)
- del(Top->prev);
+ ASSERT(Top && Bottom);
+
+ while (new_size<size)
+ del(Top->prev);
- max_size=new_size;
+ max_size=new_size;
}
VOID InitHistory(VOID)
{
- size=0;
-
- Top = cmd_alloc(sizeof(HIST_ENTRY));
- Bottom = cmd_alloc(sizeof(HIST_ENTRY));
-
- Top->prev = Bottom;
- Top->next = NULL;
- Top->string = NULL;
-
- Bottom->prev = NULL;
- Bottom->next = Top;
- Bottom->string = NULL;
-
- curr_ptr=Bottom;
+ size = 0;
+
+ Top = cmd_alloc(sizeof(HIST_ENTRY));
+ if (!Top)
+ {
+ WARN("Cannot allocate memory for Top!\n");
+ return;
+ }
+ Bottom = cmd_alloc(sizeof(HIST_ENTRY));
+ if (!Bottom)
+ {
+ WARN("Cannot allocate memory for Bottom!\n");
+ cmd_free(Top);
+ Top = NULL;
+ return;
+ }
+
+ Top->prev = Bottom;
+ Top->next = NULL;
+ Top->string = NULL;
+
+ Bottom->prev = NULL;
+ Bottom->next = Top;
+ Bottom->string = NULL;
+
+ curr_ptr = Bottom;
}
-
-
VOID CleanHistory(VOID)
{
- while (Bottom->next!=Top)
- del(Bottom->next);
+ ASSERT(Top && Bottom);
- cmd_free(Top);
- cmd_free(Bottom);
+ while (Bottom->next != Top)
+ del(Bottom->next);
+
+ cmd_free(Top);
+ cmd_free(Bottom);
}
VOID History_del_current_entry(LPTSTR str)
{
- LPHIST_ENTRY tmp;
+ LPHIST_ENTRY tmp;
+
+ ASSERT(Top && Bottom);
- if (size == 0)
- return;
+ if (size == 0)
+ return;
- if (curr_ptr == Bottom)
- curr_ptr=Bottom->next;
+ if (curr_ptr == Bottom)
+ curr_ptr = Bottom->next;
- if (curr_ptr == Top)
- curr_ptr=Top->prev;
+ if (curr_ptr == Top)
+ curr_ptr = Top->prev;
- tmp = curr_ptr;
- curr_ptr = curr_ptr->prev;
- del(tmp);
- History(-1, str);
+ tmp = curr_ptr;
+ curr_ptr = curr_ptr->prev;
+ del(tmp);
+ History(-1, str);
}
static
VOID del(LPHIST_ENTRY item)
{
- if (item==NULL || item==Top || item==Bottom)
- {
- TRACE ("del in " __FILE__ ": returning\n"
- "item is 0x%08x (Bottom is0x%08x)\n",
- item, Bottom);
- return;
- }
-
+ ASSERT(Top && Bottom);
+ if (item==NULL || item==Top || item==Bottom)
+ {
+ TRACE ("del in " __FILE__ ": returning\n"
+ "item is 0x%08x (Bottom is0x%08x)\n",
+ item, Bottom);
+ return;
+ }
- /*free string's mem*/
- if (item->string)
- cmd_free(item->string);
+ /*free string's mem*/
+ if (item->string)
+ cmd_free(item->string);
- /*set links in prev and next item*/
- item->next->prev=item->prev;
- item->prev->next=item->next;
+ /*set links in prev and next item*/
+ item->next->prev=item->prev;
+ item->prev->next=item->next;
- cmd_free(item);
+ cmd_free(item);
- size--;
+ size--;
}
static
VOID add_at_bottom(LPTSTR string)
{
-
-
- LPHIST_ENTRY tmp;
-
-
- /*delete first entry if maximum number of entries is reached*/
- while(size>=max_size)
- del(Top->prev);
-
- while (_istspace(*string))
- string++;
-
- if (*string==_T('\0'))
- return;
-
-
- /*if new entry is the same than the last do not add it*/
- if(size)
- if(_tcscmp(string,Bottom->next->string)==0)
- return;
-
-
- /*fill bottom with string, it will become Bottom->next*/
- Bottom->string=cmd_alloc((_tcslen(string)+1)*sizeof(TCHAR));
- _tcscpy(Bottom->string,string);
-
- /*save Bottom value*/
- tmp=Bottom;
-
-
- /*create new void Bottom*/
- Bottom=cmd_alloc(sizeof(HIST_ENTRY));
- Bottom->next=tmp;
- Bottom->prev=NULL;
- Bottom->string=NULL;
-
- tmp->prev=Bottom;
-
- /*set new size*/
- size++;
-
+ LPHIST_ENTRY tmp;
+
+ ASSERT(Top && Bottom);
+
+ /*delete first entry if maximum number of entries is reached*/
+ while (size>=max_size)
+ del(Top->prev);
+
+ while (_istspace(*string))
+ string++;
+
+ if (*string==_T('\0'))
+ return;
+
+ /*if new entry is the same than the last do not add it*/
+ if (size)
+ {
+ if (_tcscmp(string,Bottom->next->string)==0)
+ return;
+ }
+
+ /*create new empty Bottom*/
+ tmp = cmd_alloc(sizeof(HIST_ENTRY));
+ if (!tmp)
+ {
+ WARN("Cannot allocate memory for new Bottom!\n");
+ return;
+ }
+
+ /*fill old bottom with string, it will become new Bottom->next*/
+ Bottom->string = cmd_alloc((_tcslen(string)+1)*sizeof(TCHAR));
+ if (!Bottom->string)
+ {
+ WARN("Cannot allocate memory for Bottom->string!\n");
+ cmd_free(tmp);
+ return;
+ }
+ _tcscpy(Bottom->string,string);
+
+ tmp->next = Bottom;
+ tmp->prev = NULL;
+ tmp->string = NULL;
+
+ Bottom->prev = tmp;
+
+ /*save the new Bottom value*/
+ Bottom = tmp;
+
+ /*set new size*/
+ size++;
}
-
VOID History_move_to_bottom(VOID)
{
- curr_ptr=Bottom;
+ ASSERT(Top && Bottom);
+ curr_ptr = Bottom;
}
LPCTSTR PeekHistory(INT dir)
{
- LPHIST_ENTRY entry = curr_ptr;
+ LPHIST_ENTRY entry = curr_ptr;
- if (dir == 0)
- return NULL;
+ ASSERT(Top && Bottom);
- if (dir < 0)
- {
- /* key up */
- if (entry->next == Top || entry == Top)
- {
+ if (dir == 0)
+ return NULL;
+
+ if (dir < 0)
+ {
+ /* key up */
+ if (entry->next == Top || entry == Top)
+ {
#ifdef WRAP_HISTORY
- entry = Bottom;
+ entry = Bottom;
#else
- return NULL;
+ return NULL;
#endif
- }
- entry = entry->next;
- }
- else
- {
- /* key down */
- if (entry->next == Bottom || entry == Bottom)
- {
+ }
+ entry = entry->next;
+ }
+ else
+ {
+ /* key down */
+ if (entry->prev == Bottom || entry == Bottom)
+ {
#ifdef WRAP_HISTORY
- entry = Top;
+ entry = Top;
#else
- return NULL;
+ return NULL;
#endif
- }
- entry = entry->prev;
- }
+ }
+ entry = entry->prev;
+ }
- return entry->string;
+ return entry->string;
}
-VOID History (INT dir, LPTSTR commandline)
+VOID History(INT dir, LPTSTR commandline)
{
-
- if(dir==0)
- {
- add_at_bottom(commandline);
- curr_ptr=Bottom;
- return;
- }
-
- if (size==0)
- {
- commandline[0]=_T('\0');
- return;
- }
-
-
- if(dir<0)/*key up*/
- {
- if (curr_ptr->next==Top || curr_ptr==Top)
- {
+ ASSERT(Top && Bottom);
+
+ if (dir==0)
+ {
+ add_at_bottom(commandline);
+ curr_ptr = Bottom;
+ return;
+ }
+
+ if (size==0)
+ {
+ commandline[0]=_T('\0');
+ return;
+ }
+
+ if (dir<0)/*key up*/
+ {
+ if (curr_ptr->next==Top || curr_ptr==Top)
+ {
#ifdef WRAP_HISTORY
- curr_ptr=Bottom;
+ curr_ptr = Bottom;
#else
- curr_ptr=Top;
- commandline[0]=_T('\0');
- return;
+ curr_ptr = Top;
+ commandline[0]=_T('\0');
+ return;
#endif
- }
-
-
- curr_ptr = curr_ptr->next;
- if(curr_ptr->string)
- _tcscpy(commandline,curr_ptr->string);
-
- }
+ }
+ curr_ptr = curr_ptr->next;
+ if (curr_ptr->string)
+ _tcscpy(commandline,curr_ptr->string);
+ }
-
-
-
- if(dir>0)
- {
-
- if (curr_ptr->prev==Bottom || curr_ptr==Bottom)
- {
+ if (dir>0)
+ {
+ if (curr_ptr->prev==Bottom || curr_ptr==Bottom)
+ {
#ifdef WRAP_HISTORY
- curr_ptr=Top;
+ curr_ptr = Top;
#else
- curr_ptr=Bottom;
- commandline[0]=_T('\0');
- return;
+ curr_ptr = Bottom;
+ commandline[0]=_T('\0');
+ return;
#endif
- }
-
- curr_ptr=curr_ptr->prev;
- if(curr_ptr->string)
- _tcscpy(commandline,curr_ptr->string);
+ }
- }
+ curr_ptr = curr_ptr->prev;
+ if (curr_ptr->string)
+ _tcscpy(commandline,curr_ptr->string);
+ }
}
#endif //#if FEATURE_HISTORY
projects / reactos.git / blobdiff