static void WCEL_FindPrevInHist(WCEL_Context* ctx)
{
int startPos = ctx->histPos;
WCHAR* data;
unsigned int len, oldofs;
if (ctx->histPos && ctx->histPos == ctx->histSize) {
startPos--;
ctx->histPos--;
}
do {
data = WCEL_GetHistory(ctx, ctx->histPos);
if (ctx->histPos) ctx->histPos--;
else ctx->histPos = (ctx->histSize-1);
len = lstrlenW(data) + 1;
if ((len >= ctx->ofs) &&
(memcmp(ctx->line, data, ctx->ofs * sizeof(WCHAR)) == 0)) {
/* need to clean also the screen if new string is shorter than old one */
WCEL_DeleteString(ctx, 0, ctx->len);
if (WCEL_Grow(ctx, len))
{
oldofs = ctx->ofs;
ctx->ofs = 0;
WCEL_InsertString(ctx, data);
ctx->ofs = oldofs;
if (ctx->shall_echo)
SetConsoleCursorPosition(ctx->hConOut, WCEL_GetCoord(ctx, ctx->ofs));
HeapFree(GetProcessHeap(), 0, data);
return;
}
}
} while (ctx->histPos != startPos);
return;
}
static void WCEL_MoveToHist(WCEL_Context* ctx, int idx)
{
WCHAR* data = WCEL_GetHistory(ctx, idx);
int len = lstrlenW(data) + 1;
/* save current line edition for recall when needed (FIXME seems broken to me) */
if (ctx->histPos == ctx->histSize - 1)
{
HeapFree(GetProcessHeap(), 0, ctx->histCurr);
ctx->histCurr = HeapAlloc(GetProcessHeap(), 0, (ctx->len + 1) * sizeof(WCHAR));
memcpy(ctx->histCurr, ctx->line, (ctx->len + 1) * sizeof(WCHAR));
}
/* need to clean also the screen if new string is shorter than old one */
WCEL_DeleteString(ctx, 0, ctx->len);
ctx->ofs = 0;
/* insert new string */
if (WCEL_Grow(ctx, len))
{
WCEL_InsertString(ctx, data);
HeapFree(GetProcessHeap(), 0, data);
ctx->histPos = idx;
}
}
