end
end
- # Returns `true` if the string contains only Numeric values (and one "," or one "." character)
+ # Is this string in a valid numeric format compatible with `to_f`?
#
# assert "123".is_numeric == true
# assert "1.2".is_numeric == true
# assert "-1.2".is_numeric == true
- # assert "1,2".is_numeric == true
# assert "-1.23e-2".is_numeric == true
# assert "1..2".is_numeric == false
+ # assert "".is_numeric == false
fun is_numeric: Bool
do
- var has_point_or_comma = false
+ var has_point = false
var e_index = -1
for i in [0..length[ do
var c = chars[i]
if not c.is_numeric then
- if (c == '.' or c == ',') and not has_point_or_comma then
- has_point_or_comma = true
+ if c == '.' and not has_point then
+ has_point = true
else if c == 'e' and e_index == -1 and i > 0 and i < length - 1 and chars[i-1] != '-' then
e_index = i
else if c == '-' and i == e_index + 1 and i < length - 1 then
end
end
end
- return true
+ return not is_empty
end
# Returns `true` if the string contains only Hex chars
end
end
- # Justify a self in a space of `length`
+ # Justify `self` in a space of `length`
#
# `left` is the space ratio on the left side.
# * 0.0 for left-justified (no space at the left)
# * 1.0 for right-justified (all spaces at the left)
# * 0.5 for centered (half the spaces at the left)
#
+ # `char`, or `' '` by default, is repeated to pad the empty space.
+ #
# Examples
#
# assert "hello".justify(10, 0.0) == "hello "
# assert "hello".justify(10, 1.0) == " hello"
# assert "hello".justify(10, 0.5) == " hello "
+ # assert "hello".justify(10, 0.5, '.') == "..hello..."
#
# If `length` is not enough, `self` is returned as is.
#
# REQUIRE: `left >= 0.0 and left <= 1.0`
# ENSURE: `self.length <= length implies result.length == length`
# ENSURE: `self.length >= length implies result == self`
- fun justify(length: Int, left: Float): String
+ fun justify(length: Int, left: Float, char: nullable Char): String
do
+ var pad = (char or else ' ').to_s
var diff = length - self.length
if diff <= 0 then return to_s
assert left >= 0.0 and left <= 1.0
var before = (diff.to_f * left).to_i
- return " " * before + self + " " * (diff-before)
+ return pad * before + self + pad * (diff-before)
end
# Mangle a string to be a unique string only made of alphanumeric characters and underscores.
b.append("\\\\")
else if c.code_point < 32 then
b.add('\\')
- var oct = c.code_point.to_base(8, false)
+ var oct = c.code_point.to_base(8)
# Force 3 octal digits since it is the
# maximum allowed in the C specification
if oct.length == 1 then
b.add('\\')
b.add(c)
else if c.code_point < 32 or c == ';' or c == '|' or c == '\\' or c == '=' then
- b.append("?{c.code_point.to_base(16, false)}")
+ b.append("?{c.code_point.to_base(16)}")
else
b.add(c)
end
return hash_cache.as(not null)
end
- # Gives the formatted string back as a Nit string with `args` in place
+ # Format `self` by replacing each `%n` with the `n`th item of `args`
+ #
+ # The character `%` followed by something other than a number are left as is.
+ # To represent a `%` followed by a number, double the `%`, as in `%%7`.
#
- # assert "This %1 is a %2.".format("String", "formatted String") == "This String is a formatted String."
- # assert "\\%1 This string".format("String") == "\\%1 This string"
+ # assert "This %0 is a %1.".format("String", "formatted String") == "This String is a formatted String."
+ # assert "Do not escape % nor %%1".format("unused") == "Do not escape % nor %1"
fun format(args: Object...): String do
var s = new Array[Text]
var curr_st = 0
var i = 0
while i < length do
- # Skip escaped characters
- if self[i] == '\\' then
- i += 1
- # In case of format
- else if self[i] == '%' then
+ if self[i] == '%' then
var fmt_st = i
i += 1
var ciph_st = i
while i < length and self[i].is_numeric do
i += 1
end
- i -= 1
- var fmt_end = i
- var ciph_len = fmt_end - ciph_st + 1
- var arg_index = substring(ciph_st, ciph_len).to_i - 1
+ var ciph_len = i - ciph_st
+ if ciph_len == 0 then
+ # What follows '%' is not a number.
+ s.push substring(curr_st, i - curr_st)
+ if i < length and self[i] == '%' then
+ # Skip the next `%`
+ i += 1
+ end
+ curr_st = i
+ continue
+ end
+
+ var arg_index = substring(ciph_st, ciph_len).to_i
if arg_index >= args.length then continue
s.push substring(curr_st, fmt_st - curr_st)
s.push args[arg_index].to_s
- curr_st = i + 1
+
+ curr_st = i
+ i -= 1
end
i += 1
end
end
end
+ # Packs the content of a string in packs of `ln` chars.
+ # This variant ensures that only the last element might be smaller than `ln`
+ #
+ # ~~~nit
+ # var s = "abcdefghijklmnopqrstuvwxyz"
+ # assert s.pack_l(4) == ["abcd","efgh","ijkl","mnop","qrst","uvwx","yz"]
+ # ~~~
+ fun pack_l(ln: Int): Array[Text] do
+ var st = 0
+ var retarr = new Array[Text].with_capacity(length / ln + length % ln)
+ while st < length do
+ retarr.add(substring(st, ln))
+ st += ln
+ end
+ return retarr
+ end
+
+ # Packs the content of a string in packs of `ln` chars.
+ # This variant ensures that only the first element might be smaller than `ln`
+ #
+ # ~~~nit
+ # var s = "abcdefghijklmnopqrstuvwxyz"
+ # assert s.pack_r(4) == ["ab","cdef","ghij","klmn","opqr","stuv","wxyz"]
+ # ~~~
+ fun pack_r(ln: Int): Array[Text] do
+ var st = length
+ var retarr = new Array[Text].with_capacity(length / ln + length % ln)
+ while st >= 0 do
+ retarr.add(substring(st - ln, ln))
+ st -= ln
+ end
+ return retarr.reversed
+ end
end
# All kinds of array-based text representations.
redef class Int
# Wrapper of strerror C function
- private fun strerror_ext: NativeString `{ return strerror(self); `}
+ private fun strerror_ext: NativeString `{ return strerror((int)self); `}
# Returns a string describing error number
fun strerror: String do return strerror_ext.to_s
- # Fill `s` with the digits in base `base` of `self` (and with the '-' sign if 'signed' and negative).
+ # Fill `s` with the digits in base `base` of `self` (and with the '-' sign if negative).
# assume < to_c max const of char
- private fun fill_buffer(s: Buffer, base: Int, signed: Bool)
+ private fun fill_buffer(s: Buffer, base: Int)
do
var n: Int
# Sign
snprintf(nstr, strlen, "%ld", self);
`}
- # return displayable int in base base and signed
- fun to_base(base: Int, signed: Bool): String is abstract
+ # String representation of `self` in the given `base`
+ #
+ # ~~~
+ # assert 15.to_base(10) == "15"
+ # assert 15.to_base(16) == "f"
+ # assert 15.to_base(2) == "1111"
+ # assert (-10).to_base(3) == "-101"
+ # ~~~
+ fun to_base(base: Int): String
+ do
+ var l = digit_count(base)
+ var s = new Buffer
+ s.enlarge(l)
+ for x in [0..l[ do s.add(' ')
+ fill_buffer(s, base)
+ return s.to_s
+ end
+
# return displayable int in hexadecimal
#
# assert 1.to_hex == "1"
# assert (-255).to_hex == "-ff"
- fun to_hex: String do return to_base(16,false)
+ fun to_hex: String do return to_base(16)
end
redef class Float
end
# Length of `self` in a UTF-8 String
- private fun u8char_len: Int do
+ fun u8char_len: Int do
var c = self.code_point
if c < 0x80 then return 1
if c <= 0x7FF then return 2
# assert [1, 2, 3].join(":") == "1:2:3"
# assert [1..3].join(":") == "1:2:3"
# assert [1..3].join == "123"
- fun join(separator: nullable Text): String
+ #
+ # if `last_separator` is given, then it is used to separate the last element.
+ #
+ # assert [1, 2, 3, 4].join(", ", " and ") == "1, 2, 3 and 4"
+ fun join(separator: nullable Text, last_separator: nullable Text): String
do
if is_empty then return ""
var e = i.item
if e != null then s.append(e.to_s)
+ if last_separator == null then last_separator = separator
+
# Concat other items
i.next
while i.is_ok do
- if separator != null then s.append(separator)
e = i.item
- if e != null then s.append(e.to_s)
i.next
+ if i.is_ok then
+ if separator != null then s.append(separator)
+ else
+ if last_separator != null then s.append(last_separator)
+ end
+ if e != null then s.append(e.to_s)
end
return s.to_s
end
end
redef class NativeString
- # Returns `self` as a new String.
+ # Get a `String` from the data at `self` copied into Nit memory
+ #
+ # Require: `self` is a null-terminated string.
fun to_s_with_copy: String is abstract
- # Returns `self` as a String of `length`.
+ # Get a `String` from `length` bytes at `self`
+ #
+ # The result may point to the data at `self` or
+ # it may make a copy in Nit controlled memory.
+ # This method should only be used when `self` was allocated by the Nit GC,
+ # or when manually controlling the deallocation of `self`.
fun to_s_with_length(length: Int): String is abstract
- # Returns a new instance of `String` with self as `_items`
+ # Get a `String` from the raw `length` bytes at `self`
+ #
+ # The default value of `length` is the number of bytes before
+ # the first null character.
#
- # /!\: Does not clean the items for compliance with UTF-8,
- # Use only if you know what you are doing
- fun to_s_unsafe(len: nullable Int): String is abstract
+ # The created `String` points to the data at `self`.
+ # This method should be used when `self` was allocated by the Nit GC,
+ # or when manually controlling the deallocation of `self`.
+ #
+ # /!\: This service does not clean the items for compliance with UTF-8,
+ # use only when the data has already been verified as valid UTF-8.
+ fun to_s_unsafe(length: nullable Int): String is abstract
- # Returns `self` as a String with `bytelen` and `length` set
+ # Get a `String` from the raw `bytelen` bytes at `self` with `unilen` Unicode characters
+ #
+ # The created `String` points to the data at `self`.
+ # This method should be used when `self` was allocated by the Nit GC,
+ # or when manually controlling the deallocation of `self`.
+ #
+ # /!\: This service does not clean the items for compliance with UTF-8,
+ # use only when the data has already been verified as valid UTF-8.
#
- # SEE: `abstract_text::Text` for more infos on the difference
- # between `Text::bytelen` and `Text::length`
+ # SEE: `abstract_text::Text` for more info on the difference
+ # between `Text::bytelen` and `Text::length`.
fun to_s_full(bytelen, unilen: Int): String is abstract
+
+ # Copies the content of `src` to `self`
+ #
+ # NOTE: `self` must be large enough to withold `self.bytelen` bytes
+ fun fill_from(src: Text) do src.copy_to_native(self, src.bytelen, 0, 0)
end
redef class NativeArray[E]
nitlanguage / nit.git / blobdiff