import kernel
import math
+import fixed_ints
in "C" `{
#ifdef __linux__
#include <libkern/OSByteOrder.h>
#define be32toh(x) OSSwapBigToHostInt32(x)
#endif
+#ifdef _WIN32
+ #define be32toh(val) _byteswap_ulong(val)
+#endif
#ifdef __pnacl__
#define be16toh(val) (((val) >> 8) | ((val) << 8))
end
end
-redef class Int
+redef class UInt32
# Returns the code_point from a utf16 surrogate pair
#
- # assert 0xD83DDE02.from_utf16_surr == 0x1F602
- fun from_utf16_surr: Int do
- var hi = (self & 0xFFFF0000) >> 16
- var lo = self & 0xFFFF
- var cp = 0
- cp += (hi - 0xD800) << 10
- cp += lo - 0xDC00
- cp += 0x10000
+ # assert 0xD83DDE02u32.from_utf16_surr == 0x1F602u32
+ fun from_utf16_surr: UInt32 do
+ var hi = (self & 0xFFFF0000u32) >> 16
+ var lo = self & 0xFFFFu32
+ var cp = 0u32
+ cp += (hi - 0xD800u32) << 10
+ cp += lo - 0xDC00u32
+ cp += 0x10000u32
return cp
end
+
+ # The character which code point (unicode-wise) is `self`
+ #
+ # assert 65u32.code_point == 'A'
+ # assert 10u32.code_point == '\n'
+ # assert 0x220Bu32.code_point == '∋'
+ fun code_point: Char `{ return self; `}
end
-# Native strings are simple C char *
-extern class NativeString `{ char* `}
- # Creates a new NativeString with a capacity of `length`
+# C string `char *`
+#
+# Used as underlying implementation for `String` and some other `Text`.
+extern class CString `{ char* `}
+ # Create a new `CString` with the capacity for `length` characters
new(length: Int) is intern
- # Returns a char* starting at `index`.
+ # Get a char* starting at `index`.
#
# WARNING: Unsafe for extern code, use only for temporary
# pointer manipulation purposes (e.g. write to file or such)
- fun fast_cstring(index: Int): NativeString is intern
+ fun fast_cstring(index: Int): CString is intern
# Get char at `index`.
fun [](index: Int): Byte is intern
fun []=(index: Int, item: Byte) is intern
# Copy `self` to `dest`.
- fun copy_to(dest: NativeString, length: Int, from: Int, to: Int) is intern
+ fun copy_to(dest: CString, length: Int, from: Int, to: Int) is intern
redef fun ==(o) is intern do return is_same_instance(o)
var c = self[pos]
if c & 0x80u8 == 0u8 then return c.ascii
var b = fetch_4_hchars(pos)
- var ret = 0
- if b & 0xC00000 != 0x800000 then return 0xFFFD.code_point
- if b & 0xE0000000 == 0xC0000000 then
- ret |= (b & 0x1F000000) >> 18
- ret |= (b & 0x3F0000) >> 16
+ var ret = 0u32
+ if b & 0xC00000u32 != 0x800000u32 then return 0xFFFD.code_point
+ if b & 0xE0000000u32 == 0xC0000000u32 then
+ ret |= (b & 0x1F000000u32) >> 18
+ ret |= (b & 0x3F0000u32) >> 16
return ret.code_point
end
- if not b & 0xC000 == 0x8000 then return 0xFFFD.code_point
- if b & 0xF0000000 == 0xE0000000 then
- ret |= (b & 0xF000000) >> 12
- ret |= (b & 0x3F0000) >> 10
- ret |= (b & 0x3F00) >> 8
+ if not b & 0xC000u32 == 0x8000u32 then return 0xFFFD.code_point
+ if b & 0xF0000000u32 == 0xE0000000u32 then
+ ret |= (b & 0xF000000u32) >> 12
+ ret |= (b & 0x3F0000u32) >> 10
+ ret |= (b & 0x3F00u32) >> 8
return ret.code_point
end
- if not b & 0xC0 == 0x80 then return 0xFFFD.code_point
- if b & 0xF8000000 == 0xF0000000 then
- ret |= (b.to_i & 0x7000000) >> 6
- ret |= (b.to_i & 0x3F0000) >> 4
- ret |= (b.to_i & 0x3F00) >> 2
- ret |= b.to_i & 0x3F
+ if not b & 0xC0u32 == 0x80u32 then return 0xFFFD.code_point
+ if b & 0xF8000000u32 == 0xF0000000u32 then
+ ret |= (b & 0x7000000u32) >> 6
+ ret |= (b & 0x3F0000u32) >> 4
+ ret |= (b & 0x3F00u32) >> 2
+ ret |= b & 0x3Fu32
return ret.code_point
end
return 0xFFFD.code_point
while dist > 0 do
while dist >= 4 do
var i = fetch_4_chars(ns_i)
- if i & 0x80808080 != 0 then break
+ if i & 0x80808080u32 != 0u32 then break
ns_i += 4
my_i += 4
dist -= 4
while dist < 0 do
while dist <= -4 do
var i = fetch_4_chars(ns_i - 4)
- if i & 0x80808080 != 0 then break
+ if i & 0x80808080u32 != 0u32 then break
ns_i -= 4
my_i -= 4
dist += 4
# If the char is invalid UTF-8, `pos` is returned as-is
#
# ~~~raw
- # assert "abc".items.find_beginning_of_char_at(2) == 2
- # assert "か".items.find_beginning_of_char_at(1) == 0
+ # assert "abc".items.find_beginning_of_char_at(2) == 2
+ # assert "か".items.find_beginning_of_char_at(1) == 0
# assert [0x41u8, 233u8].to_s.items.find_beginning_of_char_at(1) == 1
# ~~~
fun find_beginning_of_char_at(pos: Int): Int do
while byte_length > 0 do
while byte_length >= 4 do
var i = fetch_4_chars(st)
- if i & 0x80808080 != 0 then break
+ if i & 0x80808080u32 != 0u32 then break
byte_length -= 4
st += 4
ln += 4
end
# Fetch 4 chars in `self` at `pos`
- fun fetch_4_chars(pos: Int): Int is intern `{ return (long)*((uint32_t*)(self+pos)); `}
+ fun fetch_4_chars(pos: Int): UInt32 is intern `{ return *((uint32_t*)(self+pos)); `}
# Fetch 4 chars in `self` at `pos`
- fun fetch_4_hchars(pos: Int): Int is intern `{ return (long)be32toh(*((uint32_t*)(self+pos))); `}
-
+ fun fetch_4_hchars(pos: Int): UInt32 is intern `{ return (uint32_t)be32toh(*((uint32_t*)(self+pos))); `}
# Right shifts `len` bytes of `self` from `sh` bytes starting at position `pos`
fun rshift(sh, len, pos: Int) do
nitlanguage / nit.git / blobdiff