# High-level abstraction for all text representations
abstract class Text
super Comparable
+ super Cloneable
redef type OTHER: Text
# implementation of an empty string.
protected fun empty: SELFTYPE is abstract
+ # Returns a copy of `self` as a Buffer
+ fun to_buffer: Buffer is abstract
+
# Gets the first char of the Text
#
# DEPRECATED : Use self.chars.first instead
end
# Return a null terminated char *
- fun to_cstring: NativeString is abstract
+ fun to_cstring: CString is abstract
# The index of the last occurrence of an element starting from pos (in reverse order).
#
# DEPRECATED : Use self.chars.last_index_of_from instead
fun last_index_of_from(item: Char, pos: Int): Int do return chars.last_index_of_from(item, pos)
+ # Concatenates `o` to `self`
+ #
+ # assert "hello" + "world" == "helloworld"
+ # assert "" + "hello" + "" == "hello"
+ fun +(o: Text): SELFTYPE is abstract
+
# Gets an iterator on the chars of self
#
# DEPRECATED : Use self.chars.iterator instead
# If no transformation is needed, return self as a string
if not has_percent then return to_s
- var buf = new NativeString(len)
+ var buf = new CString(len)
var i = 0
var l = 0
while i < length do
# Copies `n` bytes from `self` at `src_offset` into `dest` starting at `dest_offset`
#
- # Basically a high-level synonym of NativeString::copy_to
+ # Basically a high-level synonym of CString::copy_to
#
# REQUIRE: `n` must be large enough to contain `len` bytes
#
- # var ns = new NativeString(8)
+ # var ns = new CString(8)
# "Text is String".copy_to_native(ns, 8, 2, 0)
# assert ns.to_s_unsafe(8) == "xt is St"
#
- fun copy_to_native(dest: NativeString, n, src_offset, dest_offset: Int) do
+ fun copy_to_native(dest: CString, n, src_offset, dest_offset: Int) do
var mypos = src_offset
var itspos = dest_offset
while n > 0 do
end
return retarr.reversed
end
+
+ # Concatenates self `i` times
+ #
+ #~~~nit
+ # assert "abc" * 4 == "abcabcabcabc"
+ # assert "abc" * 1 == "abc"
+ # assert "abc" * 0 == ""
+ # var b = new Buffer
+ # b.append("天地")
+ # b = b * 4
+ # assert b == "天地天地天地天地"
+ #~~~
+ fun *(i: Int): SELFTYPE is abstract
+
+ # Insert `s` at `pos`.
+ #
+ #~~~nit
+ # assert "helloworld".insert_at(" ", 5) == "hello world"
+ # var b = new Buffer
+ # b.append("Hello世界")
+ # b = b.insert_at(" beautiful ", 5)
+ # assert b == "Hello beautiful 世界"
+ #~~~
+ fun insert_at(s: String, pos: Int): SELFTYPE is abstract
+
+ # Returns a reversed version of self
+ #
+ # assert "hello".reversed == "olleh"
+ # assert "bob".reversed == "bob"
+ # assert "".reversed == ""
+ fun reversed: SELFTYPE is abstract
+
+ # A upper case version of `self`
+ #
+ # assert "Hello World!".to_upper == "HELLO WORLD!"
+ fun to_upper: SELFTYPE is abstract
+
+ # A lower case version of `self`
+ #
+ # assert "Hello World!".to_lower == "hello world!"
+ fun to_lower : SELFTYPE is abstract
+
+ # Takes a camel case `self` and converts it to snake case
+ #
+ # assert "randomMethodId".to_snake_case == "random_method_id"
+ #
+ # The rules are the following:
+ #
+ # An uppercase is always converted to a lowercase
+ #
+ # assert "HELLO_WORLD".to_snake_case == "hello_world"
+ #
+ # An uppercase that follows a lowercase is prefixed with an underscore
+ #
+ # assert "HelloTheWORLD".to_snake_case == "hello_the_world"
+ #
+ # An uppercase that follows an uppercase and is followed by a lowercase, is prefixed with an underscore
+ #
+ # assert "HelloTHEWorld".to_snake_case == "hello_the_world"
+ #
+ # All other characters are kept as is; `self` does not need to be a proper CamelCased string.
+ #
+ # assert "=-_H3ll0Th3W0rld_-=".to_snake_case == "=-_h3ll0th3w0rld_-="
+ fun to_snake_case: SELFTYPE is abstract
+
+ # Takes a snake case `self` and converts it to camel case
+ #
+ # assert "random_method_id".to_camel_case == "randomMethodId"
+ #
+ # If the identifier is prefixed by an underscore, the underscore is ignored
+ #
+ # assert "_private_field".to_camel_case == "_privateField"
+ #
+ # If `self` is upper, it is returned unchanged
+ #
+ # assert "RANDOM_ID".to_camel_case == "RANDOM_ID"
+ #
+ # If there are several consecutive underscores, they are considered as a single one
+ #
+ # assert "random__method_id".to_camel_case == "randomMethodId"
+ fun to_camel_case: SELFTYPE is abstract
+
+ # Returns a capitalized `self`
+ #
+ # Letters that follow a letter are lowercased
+ # Letters that follow a non-letter are upcased.
+ #
+ # If `keep_upper = true`, already uppercase letters are not lowercased.
+ #
+ # SEE : `Char::is_letter` for the definition of letter.
+ #
+ # assert "jAVASCRIPT".capitalized == "Javascript"
+ # assert "i am root".capitalized == "I Am Root"
+ # assert "ab_c -ab0c ab\nc".capitalized == "Ab_C -Ab0C Ab\nC"
+ # assert "preserve my ACRONYMS".capitalized(keep_upper=true) == "Preserve My ACRONYMS"
+ fun capitalized(keep_upper: nullable Bool): SELFTYPE do
+ if length == 0 then return self
+
+ var buf = new Buffer.with_cap(length)
+ buf.capitalize(keep_upper=keep_upper, src=self)
+ return buf.to_s
+ end
end
# All kinds of array-based text representations.
#
# Warning : Might be void in some subclasses, be sure to check
# if set before using it.
- var items: NativeString is noinit
+ var items: CString is noinit
# Returns a char* starting at position `first_byte`
#
# WARNING: If you choose to use this service, be careful of the following.
#
- # Strings and NativeString are *ideally* always allocated through a Garbage Collector.
+ # Strings and CString are *ideally* always allocated through a Garbage Collector.
# Since the GC tracks the use of the pointer for the beginning of the char*, it may be
# deallocated at any moment, rendering the pointer returned by this function invalid.
# Any access to freed memory may very likely cause undefined behaviour or a crash.
#
# As always, do not modify the content of the String in C code, if this is what you want
# copy locally the char* as Nit Strings are immutable.
- fun fast_cstring: NativeString is abstract
+ fun fast_cstring: CString is abstract
redef var length = 0
redef fun to_s do return self
- # Concatenates `o` to `self`
- #
- # assert "hello" + "world" == "helloworld"
- # assert "" + "hello" + "" == "hello"
- fun +(o: Text): SELFTYPE is abstract
-
- # Concatenates self `i` times
- #
- # assert "abc" * 4 == "abcabcabcabc"
- # assert "abc" * 1 == "abc"
- # assert "abc" * 0 == ""
- fun *(i: Int): SELFTYPE is abstract
-
- # Insert `s` at `pos`.
- #
- # assert "helloworld".insert_at(" ", 5) == "hello world"
- fun insert_at(s: String, pos: Int): SELFTYPE is abstract
-
- redef fun substrings is abstract
-
- # Returns a reversed version of self
- #
- # assert "hello".reversed == "olleh"
- # assert "bob".reversed == "bob"
- # assert "".reversed == ""
- fun reversed: SELFTYPE is abstract
-
- # A upper case version of `self`
- #
- # assert "Hello World!".to_upper == "HELLO WORLD!"
- fun to_upper: SELFTYPE is abstract
+ redef fun clone do return self
- # A lower case version of `self`
- #
- # assert "Hello World!".to_lower == "hello world!"
- fun to_lower : SELFTYPE is abstract
+ redef fun to_buffer do return new Buffer.from_text(self)
- # Takes a camel case `self` and converts it to snake case
- #
- # assert "randomMethodId".to_snake_case == "random_method_id"
- #
- # The rules are the following:
- #
- # An uppercase is always converted to a lowercase
- #
- # assert "HELLO_WORLD".to_snake_case == "hello_world"
- #
- # An uppercase that follows a lowercase is prefixed with an underscore
- #
- # assert "HelloTheWORLD".to_snake_case == "hello_the_world"
- #
- # An uppercase that follows an uppercase and is followed by a lowercase, is prefixed with an underscore
- #
- # assert "HelloTHEWorld".to_snake_case == "hello_the_world"
- #
- # All other characters are kept as is; `self` does not need to be a proper CamelCased string.
- #
- # assert "=-_H3ll0Th3W0rld_-=".to_snake_case == "=-_h3ll0th3w0rld_-="
- fun to_snake_case: SELFTYPE
- do
- if self.is_lower then return self
-
- var new_str = new Buffer.with_cap(self.length)
- var prev_is_lower = false
- var prev_is_upper = false
-
- for i in [0..length[ do
- var char = chars[i]
- if char.is_lower then
- new_str.add(char)
- prev_is_lower = true
- prev_is_upper = false
- else if char.is_upper then
- if prev_is_lower then
- new_str.add('_')
- else if prev_is_upper and i+1 < length and chars[i+1].is_lower then
- new_str.add('_')
- end
- new_str.add(char.to_lower)
- prev_is_lower = false
- prev_is_upper = true
- else
- new_str.add(char)
- prev_is_lower = false
- prev_is_upper = false
- end
- end
-
- return new_str.to_s
- end
-
- # Takes a snake case `self` and converts it to camel case
- #
- # assert "random_method_id".to_camel_case == "randomMethodId"
- #
- # If the identifier is prefixed by an underscore, the underscore is ignored
- #
- # assert "_private_field".to_camel_case == "_privateField"
- #
- # If `self` is upper, it is returned unchanged
- #
- # assert "RANDOM_ID".to_camel_case == "RANDOM_ID"
- #
- # If there are several consecutive underscores, they are considered as a single one
- #
- # assert "random__method_id".to_camel_case == "randomMethodId"
- fun to_camel_case: SELFTYPE
- do
+ redef fun to_camel_case do
if self.is_upper then return self
- var new_str = new Buffer
- var is_first_char = true
- var follows_us = false
-
- for i in [0..length[ do
- var char = chars[i]
- if is_first_char then
- new_str.add(char)
- is_first_char = false
- else if char == '_' then
- follows_us = true
- else if follows_us then
- new_str.add(char.to_upper)
- follows_us = false
- else
- new_str.add(char)
- end
- end
-
+ var new_str = new Buffer.with_cap(length)
+ new_str.append self
+ new_str.camel_case
return new_str.to_s
end
- # Returns a capitalized `self`
- #
- # Letters that follow a letter are lowercased
- # Letters that follow a non-letter are upcased.
- #
- # If `keep_upper = true`, already uppercase letters are not lowercased.
- #
- # SEE : `Char::is_letter` for the definition of letter.
- #
- # assert "jAVASCRIPT".capitalized == "Javascript"
- # assert "i am root".capitalized == "I Am Root"
- # assert "ab_c -ab0c ab\nc".capitalized == "Ab_C -Ab0C Ab\nC"
- # assert "preserve my ACRONYMS".capitalized(keep_upper=true) == "Preserve My ACRONYMS"
- fun capitalized(keep_upper: nullable Bool): SELFTYPE do
- if length == 0 then return self
+ redef fun to_snake_case do
+ if self.is_lower then return self
- var buf = new Buffer.with_cap(length)
- buf.capitalize(keep_upper=keep_upper, src=self)
- return buf.to_s
+ var new_str = new Buffer.with_cap(self.length)
+ new_str.append self
+ new_str.snake_case
+ return new_str.to_s
end
end
# Returns an instance of a subclass of `Buffer` with `i` base capacity
new with_cap(i: Int) is abstract
+ # Returns an instance of a subclass of `Buffer` with `t` as content
+ new from_text(t: Text) do
+ var ret = new Buffer.with_cap(t.byte_length)
+ ret.append t
+ return ret
+ end
+
redef type SELFTYPE: Buffer is fixed
# Copy-On-Write flag
# DEPRECATED : Use self.chars.[]= instead
fun []=(index: Int, item: Char) is abstract
+ redef fun to_buffer do return clone
+
+ #~~~nit
+ # var b = new Buffer
+ # b.append("Buffer!")
+ # var c = b.clone
+ # assert b == c
+ #~~~
+ redef fun clone do
+ var cln = new Buffer.with_cap(byte_length)
+ cln.append self
+ return cln
+ end
+
# Adds a char `c` at the end of self
#
# DEPRECATED : Use self.chars.add instead
# NOTE: Use only if sure about `from` and `length`, no checks
# or bound recalculation is done
fun append_substring_impl(s: Text, from, length: Int) do
- var pos = from
- for i in [0 .. length[ do
- self.add s[pos]
+ var max = from + length
+ for i in [from .. max[ do add s[i]
+ end
+
+ redef fun *(i) do
+ var ret = new Buffer.with_cap(byte_length * i)
+ for its in [0 .. i[ do ret.append self
+ return ret
+ end
+
+ redef fun insert_at(s, pos) do
+ var obuf = new Buffer.with_cap(byte_length + s.byte_length)
+ obuf.append_substring(self, 0, pos)
+ obuf.append s
+ obuf.append_substring(self, pos, length - pos)
+ return obuf
+ end
+
+ # Inserts `s` at position `pos`
+ #
+ #~~~nit
+ # var b = new Buffer
+ # b.append "美しい世界"
+ # b.insert(" nit ", 3)
+ # assert b == "美しい nit 世界"
+ #~~~
+ fun insert(s: Text, pos: Int) is abstract
+
+ # Inserts `c` at position `pos`
+ #
+ #~~~nit
+ # var b = new Buffer
+ # b.append "美しい世界"
+ # b.insert_char(' ', 3)
+ # assert b == "美しい 世界"
+ #~~~
+ fun insert_char(c: Char, pos: Int) is abstract
+
+ # Removes a substring from `self` at position `pos`
+ #
+ # NOTE: `length` defaults to 1, expressed in chars
+ #
+ #~~~nit
+ # var b = new Buffer
+ # b.append("美しい 世界")
+ # b.remove_at(3)
+ # assert b == "美しい世界"
+ # b.remove_at(1, 2)
+ # assert b == "美世界"
+ #~~~
+ fun remove_at(pos: Int, length: nullable Int) is abstract
+
+ redef fun reversed do
+ var ret = clone
+ ret.reverse
+ return ret
+ end
+
+ redef fun to_upper do
+ var ret = clone
+ ret.upper
+ return ret
+ end
+
+ redef fun to_lower do
+ var ret = clone
+ ret.lower
+ return ret
+ end
+
+ redef fun to_snake_case do
+ var ret = clone
+ ret.snake_case
+ return ret
+ end
+
+ # Takes a camel case `self` and converts it to snake case
+ #
+ # SEE: `to_snake_case`
+ fun snake_case do
+ if self.is_lower then return
+ var prev_is_lower = false
+ var prev_is_upper = false
+
+ var i = 0
+ while i < length do
+ var char = chars[i]
+ if char.is_lower then
+ prev_is_lower = true
+ prev_is_upper = false
+ else if char.is_upper then
+ if prev_is_lower then
+ insert_char('_', i)
+ i += 1
+ else if prev_is_upper and i + 1 < length and self[i + 1].is_lower then
+ insert_char('_', i)
+ i += 1
+ end
+ self[i] = char.to_lower
+ prev_is_lower = false
+ prev_is_upper = true
+ else
+ prev_is_lower = false
+ prev_is_upper = false
+ end
+ i += 1
+ end
+ end
+
+ redef fun to_camel_case
+ do
+ var new_str = clone
+ new_str.camel_case
+ return new_str
+ end
+
+ # Takes a snake case `self` and converts it to camel case
+ #
+ # SEE: `to_camel_case`
+ fun camel_case do
+ if is_upper then return
+
+ var underscore_count = 0
+
+ var pos = 1
+ while pos < length do
+ var char = self[pos]
+ if char == '_' then
+ underscore_count += 1
+ else if underscore_count > 0 then
+ pos -= underscore_count
+ remove_at(pos, underscore_count)
+ self[pos] = char.to_upper
+ underscore_count = 0
+ end
pos += 1
end
+ if underscore_count > 0 then remove_at(pos - underscore_count - 1, underscore_count)
+ end
+
+ redef fun capitalized(keep_upper) do
+ if length == 0 then return self
+
+ var buf = new Buffer.with_cap(byte_length)
+ buf.capitalize(keep_upper=keep_upper, src=self)
+ return buf
end
end
# User readable representation of `self`.
fun to_s: String do return inspect
- # The class name of the object in NativeString format.
- private fun native_class_name: NativeString is intern
+ # The class name of the object in CString format.
+ private fun native_class_name: CString is intern
# The class name of the object.
#
end
redef class Byte
- # C function to calculate the length of the `NativeString` to receive `self`
+ # C function to calculate the length of the `CString` to receive `self`
private fun byte_to_s_len: Int `{
return snprintf(NULL, 0, "0x%02x", self);
`}
- # C function to convert an nit Int to a NativeString (char*)
- private fun native_byte_to_s(nstr: NativeString, strlen: Int) `{
+ # C function to convert an nit Int to a CString (char*)
+ private fun native_byte_to_s(nstr: CString, strlen: Int) `{
snprintf(nstr, strlen, "0x%02x", self);
`}
# assert (-123).to_b.to_s == "0x85"
redef fun to_s do
var nslen = byte_to_s_len
- var ns = new NativeString(nslen + 1)
+ var ns = new CString(nslen + 1)
ns[nslen] = 0u8
native_byte_to_s(ns, nslen + 1)
return ns.to_s_unsafe(nslen)
redef class Int
# Wrapper of strerror C function
- private fun strerror_ext: NativeString `{ return strerror((int)self); `}
+ private fun strerror_ext: CString `{ return strerror((int)self); `}
# Returns a string describing error number
fun strerror: String do return strerror_ext.to_s
end
end
- # C function to calculate the length of the `NativeString` to receive `self`
+ # C function to calculate the length of the `CString` to receive `self`
private fun int_to_s_len: Int `{
return snprintf(NULL, 0, "%ld", self);
`}
- # C function to convert an nit Int to a NativeString (char*)
- private fun native_int_to_s(nstr: NativeString, strlen: Int) `{
+ # C function to convert an nit Int to a CString (char*)
+ private fun native_int_to_s(nstr: CString, strlen: Int) `{
snprintf(nstr, strlen, "%ld", self);
`}
# assert 'x'.to_s == "x"
redef fun to_s do
var ln = u8char_len
- var ns = new NativeString(ln + 1)
+ var ns = new CString(ln + 1)
u8char_tos(ns, ln)
return ns.to_s_unsafe(ln)
end
return buf.to_s
end
- private fun u8char_tos(r: NativeString, len: Int) `{
+ private fun u8char_tos(r: CString, len: Int) `{
r[len] = '\0';
switch(len){
case 1:
private fun native_argc: Int is intern
# Second argument of the main C function.
- private fun native_argv(i: Int): NativeString is intern
+ private fun native_argv(i: Int): CString is intern
end
# Comparator that efficienlty use `to_s` to compare things
return sys.program_args
end
-redef class NativeString
+redef class CString
# Get a `String` from the data at `self` copied into Nit memory
#
# Require: `self` is a null-terminated string.
nitlanguage / nit.git / blobdiff