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const builtin = @import("builtin");
const std = @import("std");
const value = @import("../value.zig");
const Parser = @import("Parser.zig");
const Value = value.Value;
const is_test = builtin.is_test;
const is_debug = builtin.mode == .Debug;
// In debug, we want to see if we leak, so very small numbers.
const def_init_stack_mem = (if (is_debug) 2 else 32) * @sizeOf(Parser.Context);
const def_init_chars_mem = (if (is_debug) 2 else 2048);
pub const DefaultStackSfa = std.heap.StackFallbackAllocator(def_init_stack_mem);
pub const DefaultCharsSfa = std.heap.StackFallbackAllocator(def_init_chars_mem);
pub fn default(
fb_alloc: *std.mem.Allocator,
stack_sfa: *DefaultStackSfa,
chars_sfa: *DefaultCharsSfa,
) !Parser {
if (!is_test and is_debug) {
fb_alloc.* = std.heap.DebugAllocator(.{}).init;
}
const alloc = if (is_test)
std.testing.allocator
else if (is_debug)
fb_alloc.allocator()
else
std.heap.smp_allocator;
stack_sfa.* = std.heap.stackFallback(def_init_stack_mem, alloc);
chars_sfa.* = std.heap.stackFallback(def_init_chars_mem, alloc);
return Parser.init(
stack_sfa.get(),
chars_sfa.get(),
def_init_stack_mem,
def_init_chars_mem,
);
}
pub fn deinit(fb_alloc: *std.mem.Allocator) void {
if (!is_test and is_debug) {
if (fb_alloc.?.deinit() == .leak) {
@panic("parser leaked");
}
}
}
pub fn parse(input: std.io.AnyReader) Value {
var fb_alloc: std.mem.Allocator = undefined;
var stack_sfa: DefaultStackSfa = undefined;
var chars_sfa: DefaultCharsSfa = undefined;
var p = default(&fb_alloc, &stack_sfa, &chars_sfa) catch @panic("OOM");
defer p.deinit();
return _parse(input) catch {
if (p.unused_char) |c| {
std.debug.panic(
"Parse error: {s}, unused_char: 0x{x}\n",
.{ p.err_msg, c },
);
} else {
std.debug.panic("Parse error: {s}\n", .{p.err_msg});
}
};
}
pub fn _parse(input: std.io.AnyReader) !Value {
var fb_alloc: std.mem.Allocator = undefined;
var stack_sfa: DefaultStackSfa = undefined;
var chars_sfa: DefaultCharsSfa = undefined;
var p = try default(&fb_alloc, &stack_sfa, &chars_sfa);
defer p.deinit();
return p.run(input);
}
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