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make index operator just read 1 byte

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This commit is contained in:
Antoni Piasecki
2025-11-13 20:17:12 +01:00
parent c1bd84464c
commit 852c463532
9 changed files with 59 additions and 56 deletions
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9
src/codegen_x86_64.rs
View File

@@ -117,7 +117,7 @@ section .text
"
section .text._builtin_read8
_builtin_read8:
xor rax, rax
xor rax, rax
mov al, byte [rdi]
ret
@@ -503,11 +503,10 @@ _builtin_set64:
}
Expr::Index { expr, index } => {
self.compile_expr(env, *expr)?;
emit!(&mut self.output, " push rax");
emit!(&mut self.output, " mov rdi, rax");
self.compile_expr(env, *index)?;
emit!(&mut self.output, " pop rbx");
emit!(&mut self.output, " mov rbx, [rbx]");
emit!(&mut self.output, " mov rax, [rbx + rax*8]");
emit!(&mut self.output, " add rdi, rax");
emit!(&mut self.output, " call _builtin_read8");
}
}
Ok(())

56
src/std.zr
View File

@@ -65,14 +65,11 @@ func io.write_file[path: String, content: String] : Void
func str.len[s: String] : I64
return c.strlen(s)
func str.nth[s: String, n: I64] : U8
return mem.read8(s + n)
func str.copy[s: String] : String
let size: I64 = str.len(s) + 1
let dup: String = mem.alloc(size)
for i in 0..size+1
str.set(dup, i, str.nth(s, i))
str.set(dup, i, s[i])
return dup
func str.set[s: String, n: I64, c: U8] : Void
@@ -93,7 +90,7 @@ func str.concat[a: String, b: String] : String
func str.find[s: String, c: U8] : I64
let s_len: I64 = str.len(s)
for i in 0..s_len
if str.nth(s, i) == c
if s[i] == c
return i
return -1
@@ -110,10 +107,10 @@ func str.trim[s: String] : String
let start: I64 = 0
let end: I64 = str.len(s) - 1
while start <= end & str.is_whitespace(str.nth(s, start))
while start <= end & str.is_whitespace(s[start])
start = start + 1
while end >= start & str.is_whitespace(str.nth(s, end))
while end >= start & str.is_whitespace(s[end])
end = end - 1
return str.substr(s, start, end - start + 1)
@@ -137,7 +134,7 @@ func str.split[haystack: String, needle: String]: Array
if i <= haystack_len - needle_len
let match: Bool = true
for j in 0..needle_len
if str.nth(haystack, i+j) != str.nth(needle, j)
if haystack[i+j] != needle[j]
match = false
break
if match
@@ -155,7 +152,7 @@ func str.reverse[s: String] : String
let out: String = mem.alloc(len + 1)
for i in 0..len
str.set(out, i, str.nth(s, len - i - 1))
str.set(out, i, s[len-i-1])
str.set(out, len, 0)
return out
@@ -174,10 +171,10 @@ func str.hex_encode[s: String] : String
let out: String = mem.alloc(s_len*2+1)
for i in 0..s_len
let high: U8 = (str.nth(s, i) >> 4) & 15
let low: U8 = str.nth(s, i) & 15
str.set(out, j, str.nth(hex_chars, high))
str.set(out, j+1, str.nth(hex_chars, low))
let high: U8 = (s[i] >> 4) & 15
let low: U8 = s[i] & 15
str.set(out, j, hex_chars[high])
str.set(out, j+1, hex_chars[low])
j = j + 2
str.set(out, j, 0)
@@ -197,7 +194,7 @@ func str.hex_decode[s: String] : String
let out: String = mem.alloc(s_len/2+1)
while i < s_len
str.set(out, j, str._from_hex_digit(str.nth(s, i)) * 16 + str._from_hex_digit(str.nth(s, i+1)))
str.set(out, j, str._from_hex_digit(s[i]) * 16 + str._from_hex_digit(s[i+1]))
i = i + 2
j = j + 1
@@ -283,7 +280,8 @@ func array.nth[xs: Array, n: I64] : I64
// this probably should be implemented in the codegen
if n < 0 | n >= array.size(xs)
dbg.panic("array.nth out of bounds")
return xs[n]
let data: Ptr = mem.read64(xs)
return mem.read64(data + n * 8)
func array.set[xs: Array, n: I64, x: I64] : Void
let data: Ptr = mem.read64(xs)
@@ -325,16 +323,16 @@ func alg._do_quicksort[arr: Array, low: I64, high: I64] : Void
alg._do_quicksort(arr, i + 1, high)
func alg._partition[arr: Array, low: I64, high: I64] : I64
let pivot: I64 = arr[high]
let pivot: I64 = array.nth(arr, high)
let i: I64 = low - 1
for j in (low)..high
if arr[j] <= pivot
if array.nth(arr, j) <= pivot
i = i + 1
let temp: I64 = arr[i]
array.set(arr, i, arr[j])
let temp: I64 = array.nth(arr ,i)
array.set(arr, i, array.nth(arr, j))
array.set(arr, j, temp)
let temp: I64 = arr[i + 1]
array.set(arr, i + 1, arr[high])
let temp: I64 = array.nth(arr, i + 1)
array.set(arr, i + 1, array.nth(arr, high))
array.set(arr, high, temp)
return i + 1
@@ -359,11 +357,11 @@ func os.listdir[path: String] : Array
break
let skip: Bool = false
if mem.read8(entry + 19) == '.'
if mem.read8(entry + 20) == 0
if entry[19] == '.'
if entry[20] == 0
skip = true
else if mem.read8(entry + 20) == '.'
if mem.read8(entry + 21) == 0
else if entry[20] == '.'
if entry[21] == 0
skip = true
if !skip
@@ -410,10 +408,10 @@ func net.connect[host: String, port: I64] : I64
mem.write8(sa + 0, 2)
mem.write8(sa + 2, (port >> 8) & 255)
mem.write8(sa + 3, port & 255)
mem.write8(sa + 4, mem.read8(ip_ptr + 0))
mem.write8(sa + 5, mem.read8(ip_ptr + 1))
mem.write8(sa + 6, mem.read8(ip_ptr + 2))
mem.write8(sa + 7, mem.read8(ip_ptr + 3))
mem.write8(sa + 4, ip_ptr[0])
mem.write8(sa + 5, ip_ptr[1])
mem.write8(sa + 6, ip_ptr[2])
mem.write8(sa + 7, ip_ptr[3])
if c.connect(s, sa, 16) < 0
mem.free(sa)