SHL_EXPORT
int tsm_screen_new(struct tsm_screen **out, tsm_log_t log, void *log_data)
{
struct tsm_screen *con;
int ret;
unsigned int i;
if (!out)
return -EINVAL;
con = malloc(sizeof(*con));
if (!con)
return -ENOMEM;
memset(con, 0, sizeof(*con));
con->ref = 1;
con->llog = log;
con->llog_data = log_data;
con->age_cnt = 1;
con->age = con->age_cnt;
con->def_attr.fr = 255;
con->def_attr.fg = 255;
con->def_attr.fb = 255;
ret = tsm_symbol_table_new(&con->sym_table);
if (ret)
goto err_free;
ret = tsm_screen_resize(con, 80, 24);
if (ret)
goto err_free;
llog_debug(con, "new screen");
*out = con;
return 0;
err_free:
for (i = 0; i < con->line_num; ++i) {
line_free(con->main_lines[i]);
line_free(con->alt_lines[i]);
}
free(con->main_lines);
free(con->alt_lines);
free(con->tab_ruler);
tsm_symbol_table_unref(con->sym_table);
free(con);
return ret;
}
/*
* This decomposes a symbol into a ucs4 string and a size value. If \sym is a
* valid UCS4 character, this returns a pointer to \sym and writes 1 into \size.
* Therefore, the returned value may get destroyed if your \sym argument gets
* destroyed.
* If \sym is a composed ucs4 string, then the returned value points into the
* hash table of the symbol table and lives as long as the symbol table does.
*
* This always returns a valid value. If an error happens, the default character
* is returned. If \size is NULL, then the size value is omitted.
*/
SHL_EXPORT
const uint32_t *tsm_symbol_get(struct tsm_symbol_table *tbl,
tsm_symbol_t *sym, size_t *size)
{
uint32_t *ucs4, idx;
int ret;
if (*sym <= TSM_UCS4_MAX) {
if (size)
*size = 1;
return sym;
}
if (!tbl)
tbl = tsm_symbol_table_default;
if (!tbl) {
ret = tsm_symbol_table_new(&tbl);
if (ret) {
if (size)
*size = 1;
return &tsm_symbol_default;
}
tsm_symbol_table_default = tbl;
}
idx = *sym - (TSM_UCS4_MAX + 1);
if (idx >= shl_array_get_length(tbl->index))
ucs4 = NULL;
else
ucs4 = *SHL_ARRAY_AT(tbl->index, uint32_t*, idx);
if (!ucs4) {
if (size)
*size = 1;
return &tsm_symbol_default;
}
if (size) {
*size = 0;
while (ucs4[*size] <= TSM_UCS4_MAX)
++*size;
}
return ucs4;
}
SHL_EXPORT
unsigned int tsm_symbol_get_width(struct tsm_symbol_table *tbl,
tsm_symbol_t sym)
{
int ret;
const uint32_t *ch;
size_t len;
if (!tbl)
tbl = tsm_symbol_table_default;
if (!tbl) {
ret = tsm_symbol_table_new(&tbl);
if (ret)
return sym;
tsm_symbol_table_default = tbl;
}
ch = tsm_symbol_get(tbl, &sym, &len);
if (len == 0)
return 0;
return tsm_ucs4_get_width(*ch);
}
SHL_EXPORT
tsm_symbol_t tsm_symbol_append(struct tsm_symbol_table *tbl,
tsm_symbol_t sym, uint32_t ucs4)
{
uint32_t buf[TSM_UCS4_MAXLEN + 1], nsym, *nval;
const uint32_t *ptr;
size_t s;
void *tmp;
bool res;
int ret;
if (!tbl)
tbl = tsm_symbol_table_default;
if (!tbl) {
ret = tsm_symbol_table_new(&tbl);
if (ret)
return sym;
tsm_symbol_table_default = tbl;
}
if (ucs4 > TSM_UCS4_MAX)
return sym;
ptr = tsm_symbol_get(tbl, &sym, &s);
if (s >= TSM_UCS4_MAXLEN)
return sym;
memcpy(buf, ptr, s * sizeof(uint32_t));
buf[s++] = ucs4;
buf[s++] = TSM_UCS4_MAX + 1;
res = shl_hashtable_find(tbl->symbols, &tmp, buf);
if (res)
return (uint32_t)(long)tmp;
nval = malloc(sizeof(uint32_t) * s);
if (!nval)
return sym;
memcpy(nval, buf, s * sizeof(uint32_t));
nsym = tbl->next_id + 1;
/* Out of IDs; we actually have 2 Billion IDs so this seems
* very unlikely but lets be safe here */
if (nsym <= tbl->next_id++)
goto err_id;
ret = shl_hashtable_insert(tbl->symbols, nval, (void*)(long)nsym);
if (ret)
goto err_id;
ret = shl_array_push(tbl->index, &nval);
if (ret)
goto err_symbol;
return nsym;
err_symbol:
shl_hashtable_remove(tbl->symbols, nval);
err_id:
--tbl->next_id;
free(nval);
return sym;
}