# High-level abstraction for all text representations
abstract class Text
super Comparable
- super StringCapable
redef type OTHER: Text
#
# assert "abcd".has_substring("bc",1) == true
# assert "abcd".has_substring("bc",2) == false
+ #
+ # Returns true iff all characters of `str` are presents
+ # at the expected index in `self.`
+ # The first character of `str` being at `pos`, the second
+ # character being at `pos+1` and so on...
+ #
+ # This means that all characters of `str` need to be inside `self`.
+ #
+ # assert "abcd".has_substring("xab", -1) == false
+ # assert "abcd".has_substring("cdx", 2) == false
+ #
+ # And that the empty string is always a valid substring.
+ #
+ # assert "abcd".has_substring("", 2) == true
+ # assert "abcd".has_substring("", 200) == true
fun has_substring(str: String, pos: Int): Bool
do
+ if str.is_empty then return true
+ if pos < 0 or pos + str.length > length then return false
var myiter = self.chars.iterator_from(pos)
var itsiter = str.chars.iterator
while myiter.is_ok and itsiter.is_ok do
# assert "\n\"'\\\{\}".escape_to_nit == "\\n\\\"\\'\\\\\\\{\\\}"
fun escape_to_nit: String do return escape_more_to_c("\{\}")
+ # Escape to POSIX Shell (sh).
+ #
+ # Abort if the text contains a null byte.
+ #
+ # assert "\n\"'\\\{\}0".escape_to_sh == "'\n\"'\\''\\\{\}0'"
+ fun escape_to_sh: String do
+ var b = new FlatBuffer
+ b.chars.add '\''
+ for i in [0..length[ do
+ var c = chars[i]
+ if c == '\'' then
+ b.append("'\\''")
+ else
+ assert without_null_byte: c != '\0'
+ b.add(c)
+ end
+ end
+ b.chars.add '\''
+ return b.to_s
+ end
+
+ # Escape to include in a Makefile
+ #
+ # Unfortunately, some characters are not escapable in Makefile.
+ # These characters are `;`, `|`, `\`, and the non-printable ones.
+ # They will be rendered as `"?{hex}"`.
+ fun escape_to_mk: String do
+ var b = new FlatBuffer
+ for i in [0..length[ do
+ var c = chars[i]
+ if c == '$' then
+ b.append("$$")
+ else if c == ':' or c == ' ' or c == '#' then
+ b.add('\\')
+ b.add(c)
+ else if c.ascii < 32 or c == ';' or c == '|' or c == '\\' or c == '=' then
+ b.append("?{c.ascii.to_base(16, false)}")
+ else
+ b.add(c)
+ end
+ end
+ return b.to_s
+ end
+
# Return a string where Nit escape sequences are transformed.
#
# var s = "\\n"
private var target: SELFTYPE
- private init(tgt: SELFTYPE)
- do
- target = tgt
- end
-
redef fun is_empty do return target.is_empty
redef fun length do return target.length
fun insert_at(s: String, pos: Int): SELFTYPE is abstract
+ redef fun substrings: Iterator[String] is abstract
+
# Returns a reversed version of self
#
# assert "hello".reversed == "olleh"
var tgt: nullable FlatText
- init(tgt: FlatText) do self.tgt = tgt
-
redef fun item do
assert is_ok
return tgt.as(not null)
redef fun reversed
do
- var native = calloc_string(self.length + 1)
+ var native = new NativeString(self.length + 1)
var length = self.length
var items = self.items
var pos = 0
redef fun to_upper
do
- var outstr = calloc_string(self.length + 1)
+ var outstr = new NativeString(self.length + 1)
var out_index = 0
var myitems = self.items
redef fun to_lower
do
- var outstr = calloc_string(self.length + 1)
+ var outstr = new NativeString(self.length + 1)
var out_index = 0
var myitems = self.items
if real_items != null then
return real_items.as(not null)
else
- var newItems = calloc_string(length + 1)
+ var newItems = new NativeString(length + 1)
self.items.copy_to(newItems, length, index_from, 0)
newItems[length] = '\0'
self.real_items = newItems
var total_length = my_length + its_length
- var target_string = calloc_string(my_length + its_length + 1)
+ var target_string = new NativeString(my_length + its_length + 1)
self.items.copy_to(target_string, my_length, index_from, 0)
if s isa FlatString then
var my_items = self.items
- var target_string = calloc_string((final_length) + 1)
+ var target_string = new NativeString(final_length + 1)
target_string[final_length] = '\0'
# The COW flag can be set at false here, since
# it does a copy of the current `Buffer`
written = false
- var a = calloc_string(c+1)
+ var a = new NativeString(c+1)
if length > 0 then items.copy_to(a, length, 0, 0)
items = a
capacity = c
redef fun to_cstring
do
if is_dirty then
- var new_native = calloc_string(length + 1)
+ var new_native = new NativeString(length + 1)
new_native[length] = '\0'
if length > 0 then items.copy_to(new_native, length, 0, 0)
real_items = new_native
do
capacity = s.length + 1
length = s.length
- items = calloc_string(capacity)
+ items = new NativeString(capacity)
if s isa FlatString then
s.items.copy_to(items, length, s.index_from, 0)
else if s isa FlatBuffer then
do
assert cap >= 0
# _items = new NativeString.calloc(cap)
- items = calloc_string(cap+1)
+ items = new NativeString(cap+1)
capacity = cap
length = 0
end
redef fun reverse
do
written = false
- var ns = calloc_string(capacity)
+ var ns = new NativeString(capacity)
var si = length - 1
var ni = 0
var it = items
private class FlatBufferCharView
super BufferCharView
- super StringCapable
redef type SELFTYPE: FlatBuffer
# Native strings are simple C char *
extern class NativeString `{ char* `}
- super StringCapable
# Creates a new NativeString with a capacity of `length`
new(length: Int) is intern
fun [](index: Int): Char is intern
do
assert length >= 0
var str = new FlatString.with_infos(self, length, 0, length - 1)
- str.real_items = self
return str
end
fun to_s_with_copy: FlatString
do
var length = cstring_length
- var new_self = calloc_string(length + 1)
+ var new_self = new NativeString(length + 1)
copy_to(new_self, length, 0, 0)
var str = new FlatString.with_infos(new_self, length, 0, length - 1)
- str.real_items = self
+ new_self[length] = '\0'
+ str.real_items = new_self
return str
end
end
-# StringCapable objects can create native strings
-interface StringCapable
- protected fun calloc_string(size: Int): NativeString is intern
-end
-
redef class Sys
private var args_cache: nullable Sequence[String]
nitlanguage / nit.git / blobdiff