mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
844 lines
17 KiB
V
844 lines
17 KiB
V
/*=============================================================================
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Copyright (c) 2019-2021 Dario Deledda. All rights reserved.
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Use of this source code is governed by an MIT license
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that can be found in the LICENSE file.
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This file contains string interpolation V functions
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=============================================================================*/
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module strconv
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import strings
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enum Char_parse_state {
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start
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norm_char
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field_char
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pad_ch
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len_set_start
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len_set_in
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check_type
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check_float
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check_float_in
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reset_params
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}
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pub fn v_printf(str string, pt ... voidptr) {
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print(v_sprintf(str, pt))
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}
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pub fn v_sprintf(str string, pt ... voidptr) string{
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mut res := strings.new_builder(pt.len * 16)
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mut i := 0 // main string index
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mut p_index := 0 // parameter index
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mut sign := false // sign flag
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mut allign := Align_text.right
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mut len0 := -1 // forced length, if -1 free length
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mut len1 := -1 // decimal part for floats
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def_len1 := 6 // default value for len1
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mut pad_ch := byte(` `) // pad char
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// prefix chars for Length field
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mut ch1 := `0` // +1 char if present else `0`
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mut ch2 := `0` // +2 char if present else `0`
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mut status := Char_parse_state.norm_char
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for i < str.len {
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if status == .reset_params {
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sign = false
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allign = .right
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len0 = -1
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len1 = -1
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pad_ch = ` `
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status = .norm_char
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ch1 = `0`
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ch2 = `0`
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continue
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}
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ch := str[i]
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if ch != `%` && status == .norm_char {
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res.write_b(ch)
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i++
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continue
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}
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if ch == `%` && status == .norm_char {
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status = .field_char
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i++
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continue
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}
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// single char, manage it here
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if ch == `c` && status == .field_char {
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v_sprintf_panic(p_index, pt.len)
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d1 := unsafe {*(&byte(pt[p_index]))}
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res.write_b(d1)
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status = .reset_params
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p_index++
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i++
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continue
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}
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// pointer, manage it here
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if ch == `p` && status == .field_char {
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v_sprintf_panic(p_index, pt.len)
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res.write_string("0x")
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res.write_string(ptr_str(unsafe {pt[p_index]}))
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status = .reset_params
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p_index++
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i++
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continue
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}
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if status == .field_char {
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mut fc_ch1 := `0`
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mut fc_ch2 := `0`
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if (i + 1) < str.len {
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fc_ch1 = str[i+1]
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if (i + 2) < str.len {
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fc_ch2 = str[i+2]
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}
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}
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if ch == `+` {
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sign = true
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i++
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continue
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} else if ch == `-` {
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allign = .left
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i++
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continue
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} else if ch in [`0`,` `] {
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if allign == .right {
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pad_ch = ch
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}
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i++
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continue
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} else if ch == `'` {
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i++
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continue
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} else if ch == `.` && fc_ch1 >= `1` && fc_ch1 <= `9` {
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status = .check_float
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i++
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continue
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}
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// manage "%.*s" precision field
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else if ch == `.` && fc_ch1 == `*` && fc_ch2 == `s` {
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v_sprintf_panic(p_index, pt.len)
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len := unsafe {*(&int(pt[p_index]))}
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p_index++
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v_sprintf_panic(p_index, pt.len)
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mut s := unsafe {*(&string(pt[p_index]))}
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s = s[..len]
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p_index++
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res.write_string(s)
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status = .reset_params
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i += 3
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continue
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}
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status = .len_set_start
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continue
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}
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if status == .len_set_start {
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if ch >= `1` && ch <= `9` {
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len0 = int(ch - `0`)
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status = .len_set_in
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i++
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continue
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}
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if ch == `.` {
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status = .check_float
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i++
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continue
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}
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status = .check_type
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continue
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}
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if status == .len_set_in {
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if ch >= `0` && ch <= `9` {
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len0 *= 10
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len0 += int(ch - `0`)
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i++
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continue
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}
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if ch == `.` {
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status = .check_float
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i++
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continue
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}
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status = .check_type
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continue
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}
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if status == .check_float {
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if ch >= `0` && ch <= `9` {
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len1 = int(ch - `0`)
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status = .check_float_in
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i++
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continue
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}
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status = .check_type
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continue
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}
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if status == .check_float_in {
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if ch >= `0` && ch <= `9` {
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len1 *= 10
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len1 += int(ch - `0`)
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i++
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continue
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}
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status = .check_type
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continue
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}
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if status == .check_type {
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if ch == `l` {
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if ch1 == `0` {
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ch1 = `l`
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i++
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continue
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} else {
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ch2 = `l`
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i++
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continue
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}
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}
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else if ch == `h` {
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if ch1 == `0` {
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ch1 = `h`
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i++
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continue
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} else {
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ch2 = `h`
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i++
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continue
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}
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}
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// signed integer
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else if ch in [`d`,`i`] {
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mut d1 := u64(0)
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mut positive := true
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//println("$ch1 $ch2")
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match ch1 {
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// h for 16 bit int
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// hh fot 8 bit int
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`h` {
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if ch2 == `h` {
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v_sprintf_panic(p_index, pt.len)
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x := unsafe {*(&i8(pt[p_index]))}
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positive = if x >= 0 { true } else { false }
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d1 = if positive { u64(x) } else { u64(-x) }
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} else {
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x := unsafe {*(&i16(pt[p_index]))}
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positive = if x >= 0 { true } else { false }
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d1 = if positive { u64(x) } else { u64(-x) }
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}
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}
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// l i64
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// ll i64 for now
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`l` {
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// placeholder for future 128bit integer code
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/*
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if ch2 == `l` {
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v_sprintf_panic(p_index, pt.len)
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x := *(&i128(pt[p_index]))
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positive = if x >= 0 { true } else { false }
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d1 = if positive { u128(x) } else { u128(-x) }
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} else {
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v_sprintf_panic(p_index, pt.len)
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x := *(&i64(pt[p_index]))
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positive = if x >= 0 { true } else { false }
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d1 = if positive { u64(x) } else { u64(-x) }
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}
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*/
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v_sprintf_panic(p_index, pt.len)
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x := unsafe {*(&i64(pt[p_index]))}
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positive = if x >= 0 { true } else { false }
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d1 = if positive { u64(x) } else { u64(-x) }
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}
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// default int
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else {
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v_sprintf_panic(p_index, pt.len)
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x := unsafe {*(&int(pt[p_index]))}
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positive = if x >= 0 { true } else { false }
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d1 = if positive { u64(x) } else { u64(-x) }
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}
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}
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res.write_string(format_dec_old(d1,{pad_ch: pad_ch, len0: len0, len1: 0, positive: positive, sign_flag: sign, allign: allign}))
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status = .reset_params
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p_index++
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i++
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ch1 = `0`
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ch2 = `0`
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continue
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}
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// unsigned integer
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else if ch == `u` {
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mut d1 := u64(0)
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positive := true
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v_sprintf_panic(p_index, pt.len)
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match ch1 {
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// h for 16 bit unsigned int
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// hh fot 8 bit unsigned int
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`h` {
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if ch2 == `h` {
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d1 = u64(unsafe {*(&byte(pt[p_index]))})
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} else {
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d1 = u64(unsafe {*(&u16(pt[p_index]))})
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}
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}
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// l u64
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// ll u64 for now
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`l` {
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// placeholder for future 128bit integer code
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/*
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if ch2 == `l` {
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d1 = u128(*(&u128(pt[p_index])))
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} else {
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d1 = u64(*(&u64(pt[p_index])))
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}
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*/
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d1 = u64(unsafe {*(&u64(pt[p_index]))})
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}
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// default int
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else {
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d1 = u64(unsafe {*(&u32(pt[p_index]))})
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}
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}
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res.write_string(format_dec_old(d1,{pad_ch: pad_ch, len0: len0, len1: 0, positive: positive, sign_flag: sign, allign: allign}))
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status = .reset_params
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p_index++
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i++
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continue
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}
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// hex
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else if ch in [`x`, `X`] {
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v_sprintf_panic(p_index, pt.len)
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mut s := ""
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match ch1 {
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// h for 16 bit int
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// hh fot 8 bit int
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`h` {
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if ch2 == `h` {
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x := unsafe {*(&i8(pt[p_index]))}
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s = x.hex()
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} else {
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x := unsafe {*(&i16(pt[p_index]))}
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s = x.hex()
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}
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}
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// l i64
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// ll i64 for now
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`l` {
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// placeholder for future 128bit integer code
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/*
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if ch2 == `l` {
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x := *(&i128(pt[p_index]))
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s = x.hex()
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} else {
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x := *(&i64(pt[p_index]))
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s = x.hex()
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}
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*/
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x := unsafe {*(&i64(pt[p_index]))}
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s = x.hex()
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}
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else {
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x := unsafe {*(&int(pt[p_index]))}
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s = x.hex()
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}
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}
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if ch == `X` {
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s = s.to_upper()
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}
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res.write_string(format_str(s,{pad_ch: pad_ch, len0: len0, len1: 0, positive: true, sign_flag: false, allign: allign}))
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status = .reset_params
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p_index++
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i++
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continue
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}
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// float and double
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if ch in [`f`, `F`] {
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v_sprintf_panic(p_index, pt.len)
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x := unsafe {*(&f64(pt[p_index]))}
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positive := x >= f64(0.0)
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len1 = if len1 >= 0 { len1 } else { def_len1 }
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s := format_fl_old(f64(x), {pad_ch: pad_ch, len0: len0, len1: len1, positive: positive, sign_flag: sign, allign: allign})
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res.write_string(if ch == `F` {s.to_upper()} else {s})
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status = .reset_params
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p_index++
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i++
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continue
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}
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else if ch in [`e`, `E`] {
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v_sprintf_panic(p_index, pt.len)
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x := unsafe {*(&f64(pt[p_index]))}
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positive := x >= f64(0.0)
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len1 = if len1 >= 0 { len1 } else { def_len1 }
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s := format_es_old(f64(x), {pad_ch: pad_ch, len0: len0, len1: len1, positive: positive, sign_flag: sign, allign: allign})
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res.write_string(if ch == `E` {s.to_upper()} else {s})
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status = .reset_params
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p_index++
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i++
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continue
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}
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else if ch in [`g`, `G`] {
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v_sprintf_panic(p_index, pt.len)
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x := unsafe {*(&f64(pt[p_index]))}
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positive := x >= f64(0.0)
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mut s := ""
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tx := fabs(x)
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if tx < 999_999.0 && tx >= 0.00001 {
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//println("Here g format_fl [$tx]")
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len1 = if len1 >= 0 { len1+1 } else { def_len1 }
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s = format_fl_old(x, {pad_ch: pad_ch, len0: len0, len1: len1, positive: positive, sign_flag: sign, allign: allign, rm_tail_zero: true})
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} else {
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len1 = if len1 >= 0 { len1+1 } else { def_len1 }
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s = format_es_old(x, {pad_ch: pad_ch, len0: len0, len1: len1, positive: positive, sign_flag: sign, allign: allign, rm_tail_zero: true})
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}
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res.write_string(if ch == `G` {s.to_upper()} else {s})
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status = .reset_params
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p_index++
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i++
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continue
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}
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// string
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else if ch == `s` {
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v_sprintf_panic(p_index, pt.len)
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s1 := unsafe{*(&string(pt[p_index]))}
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pad_ch = ` `
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res.write_string(format_str(s1, {pad_ch: pad_ch, len0: len0, len1: 0, positive: true, sign_flag: false, allign: allign}))
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status = .reset_params
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p_index++
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i++
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continue
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}
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}
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status = .reset_params
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p_index++
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i++
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}
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if p_index != pt.len {
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panic('${p_index} % conversion specifiers, but given ${pt.len} args')
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}
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return res.str()
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}
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[inline]
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fn v_sprintf_panic(idx int, len int) {
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if idx >= len {
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panic('${idx+1} % conversion specifiers, but given only ${len} args')
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}
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}
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fn fabs(x f64) f64 {
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if x < 0.0 {
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return -x
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}
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return x
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}
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[manualfree]
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pub fn f64_to_str_lnd1(f f64, dec_digit int) string {
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unsafe{
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// we add the rounding value
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s := f64_to_str(f + dec_round[dec_digit], 18)
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// check for +inf -inf Nan
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if s.len > 2 && (s[0] == `n` || s[1] == `i`) {
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return s
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}
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m_sgn_flag := false
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mut sgn := 1
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mut b := [26]byte{}
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mut d_pos := 1
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mut i := 0
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mut i1 := 0
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mut exp := 0
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mut exp_sgn := 1
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mut dot_res_sp := -1
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// get sign and deciaml parts
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for c in s {
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if c == `-` {
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sgn = -1
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i++
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} else if c == `+` {
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sgn = 1
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i++
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}
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else if c >= `0` && c <= `9` {
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b[i1] = c
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i1++
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i++
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} else if c == `.` {
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if sgn > 0 {
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d_pos = i
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} else {
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d_pos = i-1
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}
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i++
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} else if c == `e` {
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i++
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break
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} else {
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s.free()
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return "[Float conversion error!!]"
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}
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}
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b[i1] = 0
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|
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// get exponent
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if s[i] == `-` {
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exp_sgn = -1
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i++
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} else if s[i] == `+` {
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exp_sgn = 1
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i++
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}
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|
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mut c := i
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for c < s.len {
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exp = exp * 10 + int(s[c] - `0`)
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c++
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}
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|
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// allocate exp+32 chars for the return string
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//mut res := []byte{len:exp+32,init:`0`}
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mut res := []byte{len: exp+32, init: 0}
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mut r_i := 0 // result string buffer index
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//println("s:${sgn} b:${b[0]} es:${exp_sgn} exp:${exp}")
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// s no more needed
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s.free()
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|
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if sgn == 1 {
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if m_sgn_flag {
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res[r_i] = `+`
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r_i++
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}
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} else {
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res[r_i] = `-`
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r_i++
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}
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|
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i = 0
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if exp_sgn >= 0 {
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for b[i] != 0 {
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res[r_i] = b[i]
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r_i++
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i++
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if i >= d_pos && exp >= 0 {
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if exp == 0 {
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dot_res_sp = r_i
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res[r_i] = `.`
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r_i++
|
|
}
|
|
exp--
|
|
}
|
|
}
|
|
for exp >= 0 {
|
|
res[r_i] = `0`
|
|
r_i++
|
|
exp--
|
|
}
|
|
//println("exp: $exp $r_i $dot_res_sp")
|
|
} else {
|
|
mut dot_p := true
|
|
for exp > 0 {
|
|
res[r_i] = `0`
|
|
r_i++
|
|
exp--
|
|
if dot_p {
|
|
dot_res_sp = r_i
|
|
res[r_i] = `.`
|
|
r_i++
|
|
dot_p = false
|
|
}
|
|
}
|
|
for b[i] != 0 {
|
|
res[r_i] = b[i]
|
|
r_i++
|
|
i++
|
|
}
|
|
}
|
|
|
|
// no more digits needed, stop here
|
|
if dec_digit <= 0 {
|
|
tmp_res := tos(res.data, dot_res_sp).clone()
|
|
res.free()
|
|
return tmp_res
|
|
}
|
|
|
|
//println("r_i-d_pos: ${r_i - d_pos}")
|
|
if dot_res_sp >= 0 {
|
|
if (r_i - dot_res_sp) > dec_digit {
|
|
r_i = dot_res_sp + dec_digit + 1
|
|
}
|
|
res[r_i] = 0
|
|
//println("result: [${tos(&res[0],r_i)}]")
|
|
tmp_res := tos(res.data, r_i).clone()
|
|
res.free()
|
|
return tmp_res
|
|
} else {
|
|
if dec_digit > 0 {
|
|
mut c1 := 0
|
|
res[r_i] = `.`
|
|
r_i++
|
|
for c1 < dec_digit {
|
|
res[r_i] = `0`
|
|
r_i++
|
|
c1++
|
|
}
|
|
res[r_i] = 0
|
|
}
|
|
tmp_res := tos(res.data, r_i).clone()
|
|
res.free()
|
|
return tmp_res
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
// strings.Builder version of format_fl
|
|
[manualfree]
|
|
pub fn format_fl_old(f f64, p BF_param) string {
|
|
unsafe{
|
|
mut s := ""
|
|
//mut fs := "1.2343"
|
|
mut fs := f64_to_str_lnd1(if f >= 0.0 {f} else {-f}, p.len1)
|
|
//println("Dario")
|
|
//println(fs)
|
|
|
|
// error!!
|
|
if fs[0] == `[` {
|
|
s.free()
|
|
return fs
|
|
}
|
|
|
|
if p.rm_tail_zero {
|
|
tmp := fs
|
|
fs = remove_tail_zeros_old(fs)
|
|
tmp.free()
|
|
}
|
|
mut res := strings.new_builder( if p.len0 > fs.len { p.len0 } else { fs.len })
|
|
|
|
mut sign_len_diff := 0
|
|
if p.pad_ch == `0` {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
res.write_b(`+`)
|
|
sign_len_diff = -1
|
|
}
|
|
} else {
|
|
res.write_b(`-`)
|
|
sign_len_diff = -1
|
|
}
|
|
tmp := s
|
|
s = fs.clone()
|
|
tmp.free()
|
|
} else {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
tmp := s
|
|
s = "+" + fs
|
|
tmp.free()
|
|
} else {
|
|
tmp := s
|
|
s = fs.clone()
|
|
tmp.free()
|
|
}
|
|
} else {
|
|
tmp := s
|
|
s = "-" + fs
|
|
tmp.free()
|
|
}
|
|
}
|
|
|
|
dif := p.len0 - s.len + sign_len_diff
|
|
|
|
if p.allign == .right {
|
|
for i1 :=0; i1 < dif; i1++ {
|
|
res.write_b(p.pad_ch)
|
|
}
|
|
}
|
|
res.write_string(s)
|
|
if p.allign == .left {
|
|
for i1 :=0; i1 < dif; i1++ {
|
|
res.write_b(p.pad_ch)
|
|
}
|
|
}
|
|
|
|
|
|
s.free()
|
|
fs.free()
|
|
tmp_res := res.str()
|
|
res.free()
|
|
return tmp_res
|
|
}
|
|
}
|
|
|
|
[manualfree]
|
|
pub fn format_es_old(f f64, p BF_param) string {
|
|
unsafe{
|
|
mut s := ""
|
|
mut fs := f64_to_str_pad(if f> 0 {f} else {-f},p.len1)
|
|
if p.rm_tail_zero {
|
|
fs = remove_tail_zeros_old(fs)
|
|
}
|
|
mut res := strings.new_builder( if p.len0 > fs.len { p.len0 } else { fs.len })
|
|
|
|
mut sign_len_diff := 0
|
|
if p.pad_ch == `0` {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
res.write_b(`+`)
|
|
sign_len_diff = -1
|
|
}
|
|
} else {
|
|
res.write_b(`-`)
|
|
sign_len_diff = -1
|
|
}
|
|
tmp := s
|
|
s = fs.clone()
|
|
tmp.free()
|
|
} else {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
tmp := s
|
|
s = "+" + fs
|
|
tmp.free()
|
|
} else {
|
|
tmp := s
|
|
s = fs.clone()
|
|
tmp.free()
|
|
}
|
|
} else {
|
|
tmp := s
|
|
s = "-" + fs
|
|
tmp.free()
|
|
}
|
|
}
|
|
|
|
dif := p.len0 - s.len + sign_len_diff
|
|
if p.allign == .right {
|
|
for i1 :=0; i1 < dif; i1++ {
|
|
res.write_b(p.pad_ch)
|
|
}
|
|
}
|
|
res.write_string(s)
|
|
if p.allign == .left {
|
|
for i1 :=0; i1 < dif; i1++ {
|
|
res.write_b(p.pad_ch)
|
|
}
|
|
}
|
|
s.free()
|
|
fs.free()
|
|
tmp_res := res.str()
|
|
res.free()
|
|
return tmp_res
|
|
}
|
|
}
|
|
|
|
pub fn remove_tail_zeros_old(s string) string {
|
|
mut i := 0
|
|
mut last_zero_start := -1
|
|
mut dot_pos := -1
|
|
mut in_decimal := false
|
|
mut prev_ch := byte(0)
|
|
for i < s.len {
|
|
ch := unsafe {s.str[i]}
|
|
if ch == `.` {
|
|
in_decimal = true
|
|
dot_pos = i
|
|
}
|
|
else if in_decimal {
|
|
if ch == `0` && prev_ch != `0` {
|
|
last_zero_start = i
|
|
} else if ch >= `1` && ch <= `9` {
|
|
last_zero_start = -1
|
|
} else if ch == `e` {
|
|
break
|
|
}
|
|
}
|
|
prev_ch = ch
|
|
i++
|
|
}
|
|
|
|
mut tmp := ""
|
|
if last_zero_start > 0 {
|
|
if last_zero_start == dot_pos+1 {
|
|
tmp = s[..dot_pos] + s[i..]
|
|
}else {
|
|
tmp = s[..last_zero_start] + s[i..]
|
|
}
|
|
} else {
|
|
tmp = s
|
|
}
|
|
if unsafe {tmp.str[tmp.len-1]} == `.` {
|
|
return tmp[..tmp.len-1]
|
|
}
|
|
return tmp
|
|
}
|
|
|
|
// max int64 9223372036854775807
|
|
pub fn format_dec_old(d u64, p BF_param) string {
|
|
mut s := ""
|
|
mut res := strings.new_builder(20)
|
|
mut sign_len_diff := 0
|
|
if p.pad_ch == `0` {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
res.write_b(`+`)
|
|
sign_len_diff = -1
|
|
}
|
|
} else {
|
|
res.write_b(`-`)
|
|
sign_len_diff = -1
|
|
}
|
|
s = d.str()
|
|
} else {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
s = "+" + d.str()
|
|
} else {
|
|
s = d.str()
|
|
}
|
|
} else {
|
|
s = "-" + d.str()
|
|
}
|
|
}
|
|
dif := p.len0 - s.len + sign_len_diff
|
|
|
|
if p.allign == .right {
|
|
for i1 :=0; i1 < dif; i1++ {
|
|
res.write_b(p.pad_ch)
|
|
}
|
|
}
|
|
res.write_string(s)
|
|
if p.allign == .left {
|
|
for i1 :=0; i1 < dif; i1++ {
|
|
res.write_b(p.pad_ch)
|
|
}
|
|
}
|
|
return res.str()
|
|
} |