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don't heap allocate in io.printf

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This commit is contained in:
Antoni Piasecki
2026-03-14 11:44:14 +01:00
parent 4a60c1fc12
commit 3f9df4a32f
3 changed files with 39 additions and 31 deletions
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29
src/std/std.zr
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@@ -186,35 +186,28 @@ func mem.write32[x: ptr, d: i64] : void
func mem.write64[x: ptr, d: i64] : void
_builtin_set64(x, d)
// TODO: we don't have variadics so we manually skip arity checking in the analyzer
func io.printf[s: str, a1: any, a2: any, a3: any, a4: any, a5: any] : void
// TODO: we really shouldn't heap allocate to print something
let args: Array = [a1, a2, a3, a4, a5]
let arg_idx: i64 = 0
func io._printf_impl[s: str, args: ptr] : void
while s[0]
if s[0] == '%'
s = s + 1
if s[0] == 'd'
io.print_i64(array.nth(args, arg_idx))
arg_idx = arg_idx + 1
io.print_i64(mem.read64(args))
args = args + 8
else if s[0] == 'x'
io.print_i64_hex(array.nth(args, arg_idx))
arg_idx = arg_idx + 1
io.print_i64_hex(mem.read64(args))
args = args + 8
else if s[0] == 's'
io.print(array.nth(args, arg_idx))
arg_idx = arg_idx + 1
else if (s[0] == 'c')
io.print_char(array.nth(args, arg_idx))
arg_idx = arg_idx + 1
else if (s[0] == '%')
io.print(mem.read64(args))
args = args + 8
else if s[0] == 'c'
io.print_char(mem.read64(args))
args = args + 8
else if s[0] == '%'
io.print_char('%')
else
io.print_char(s[0])
s = s + 1
array.free(args)
func io.print_sized[x: str, size: i64] : void
_builtin_syscall(SYS_write, 1, x, size)