Function allocNextIntoArrayListMax [src]
The next token type must be either .number or .string. See peekNextTokenType().
When allocation is not necessary with .alloc_if_needed,
this method returns the content slice from the input buffer, and value_list is not touched.
When allocation is necessary or with .alloc_always, this method concatenates partial tokens into the given value_list,
and returns null once the final .number or .string token has been written into it.
In case of an error.BufferUnderrun, partial values will be left in the given value_list.
The given value_list is never reset by this method, so an error.BufferUnderrun situation
can be resumed by passing the same array list in again.
This method does not indicate whether the token content being returned is for a .number or .string token type;
the caller of this method is expected to know which type of token is being processed.
Prototype
pub fn allocNextIntoArrayListMax(self: *@This(), value_list: *ArrayList(u8), when: AllocWhen, max_value_len: usize) AllocIntoArrayListError!?[]const u8 Parameters
self: *@This()value_list: *ArrayList(u8)when: AllocWhenmax_value_len: usize Possible Errors
Source
pub fn allocNextIntoArrayListMax(self: *@This(), value_list: *ArrayList(u8), when: AllocWhen, max_value_len: usize) AllocIntoArrayListError!?[]const u8 {
while (true) {
const token = try self.next();
switch (token) {
// Accumulate partial values.
.partial_number, .partial_string => |slice| {
try appendSlice(value_list, slice, max_value_len);
},
.partial_string_escaped_1 => |buf| {
try appendSlice(value_list, buf[0..], max_value_len);
},
.partial_string_escaped_2 => |buf| {
try appendSlice(value_list, buf[0..], max_value_len);
},
.partial_string_escaped_3 => |buf| {
try appendSlice(value_list, buf[0..], max_value_len);
},
.partial_string_escaped_4 => |buf| {
try appendSlice(value_list, buf[0..], max_value_len);
},
// Return complete values.
.number => |slice| {
if (when == .alloc_if_needed and value_list.items.len == 0) {
// No alloc necessary.
return slice;
}
try appendSlice(value_list, slice, max_value_len);
// The token is complete.
return null;
},
.string => |slice| {
if (when == .alloc_if_needed and value_list.items.len == 0) {
// No alloc necessary.
return slice;
}
try appendSlice(value_list, slice, max_value_len);
// The token is complete.
return null;
},
.object_begin,
.object_end,
.array_begin,
.array_end,
.true,
.false,
.null,
.end_of_document,
=> unreachable, // Only .number and .string token types are allowed here. Check peekNextTokenType() before calling this.
.allocated_number, .allocated_string => unreachable,
}
}
}