String::String(rune code) {
rune r[2] = { code, 0 };
s_len = s_cap = 0;
s_data = nullptr;
grow(utf8_encoded_len(r) + 1);
utf8_encode(r, s_data, s_cap);
s_len = utf8_len(s_data);
}
String::String(const rune *r) {
if (r == nullptr) {
s_len = 0;
s_cap = kSmallestString;
s_data = new char[s_cap];
*s_data = 0;
} else {
s_len = s_cap = 0;
s_data = nullptr;
grow(utf8_encoded_len(r) + 1);
utf8_encode(r, s_data, s_cap);
s_len = utf8_len(s_data);
}
}
static uint32
parse_numeric_entity(const struct array entity)
{
size_t i = 0;
if (i < entity.size && '#' == entity.data[i]) {
unsigned base;
uint32 v;
i++;
switch (entity.data[i]) {
case 'x':
case 'X':
base = 16;
i++;
break;
default:
base = 10;
}
v = 0;
while (i < entity.size) {
unsigned d;
d = hex2int_inline(entity.data[i++]);
if (d >= base)
goto error;
v = v * base + d;
if (v >= 0x10ffffU)
goto error;
}
if (0 == utf8_encoded_len(v))
goto error;
return v;
}
error:
return -1;
}
static int
html_parse(struct html_output *output, const struct array array)
{
size_t i, line_num;
const char *msg;
uint32 c;
unsigned c_len;
struct array tag, text;
struct html_node *nodes, *root;
line_num = 1;
root = html_node_alloc();
nodes = root;
tag = zero_array;
text = array_init(array.data, 0);
for (i = 0; i < array.size; i += c_len) {
const char *next_ptr;
c = utf8_decode(&array.data[i], i - array.size);
if ((uint32)-1 == c) {
msg = "Invalid UTF-8 encoding";
goto error;
}
c_len = utf8_encoded_len(c);
next_ptr = &array.data[i + c_len];
switch (c) {
case '<':
if (tag.data) {
tag.size += c_len;
} else {
if (text.data && text.size > 0) {
struct html_node *node;
node = html_node_alloc();
node->type = HTML_NODE_TEXT;
node->array = text;
node->next = NULL;
nodes->next = node;
nodes = node;
text = zero_array;
}
tag.data = deconstify_gchar(next_ptr);
tag.size = 0;
}
break;
case '>':
if (!tag.data) {
g_warning("'>' but no open tag");
if (text.data)
text.size += c_len;
} else if (
HTML_TAG_COMMENT == parse_tag(tag) &&
0 != memcmp(&tag.data[tag.size - 2], "--", 2)
) {
tag.size += c_len;
} else {
struct html_node *node;
node = html_node_alloc();
node->type = HTML_NODE_TAG;
node->array = tag;
node->next = NULL;
nodes->next = node;
nodes = node;
tag = zero_array;
text = array_init(next_ptr, 0);
}
break;
case '\n':
line_num++;
/* FALL THROUGH */
default:
if (tag.data) {
tag.size += c_len;
} else if (text.data) {
text.size += c_len;
}
}
}
{
struct render_context ctx;
ctx = zero_render_context;
ctx.output = output;
ctx.root = root;
html_render(&ctx);
}
html_free(root);
return 0;
error:
g_warning("line %zu: error: %s", line_num, msg);
html_free(root);
return -1;
}
