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https://github.com/vlang/v.git
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727 lines
14 KiB
V
727 lines
14 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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} 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,
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pad_ch: pad_ch
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len0: len0
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len1: 0
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positive: positive
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sign_flag: sign
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allign: allign
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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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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,
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pad_ch: pad_ch
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len0: len0
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len1: 0
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positive: positive
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sign_flag: sign
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allign: allign
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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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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,
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pad_ch: pad_ch
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len0: len0
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len1: 0
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positive: true
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sign_flag: false
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allign: allign
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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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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),
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pad_ch: pad_ch
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len0: len0
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len1: len1
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positive: positive
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sign_flag: sign
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allign: allign
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)
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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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} 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),
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pad_ch: pad_ch
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len0: len0
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len1: len1
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positive: positive
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sign_flag: sign
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allign: allign
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)
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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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} 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,
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pad_ch: pad_ch
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len0: len0
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len1: len1
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positive: positive
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sign_flag: sign
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allign: allign
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rm_tail_zero: true
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)
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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,
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pad_ch: pad_ch
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len0: len0
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len1: len1
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positive: positive
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sign_flag: sign
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allign: allign
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rm_tail_zero: true
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)
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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,
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pad_ch: pad_ch
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len0: len0
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len1: 0
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positive: true
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sign_flag: false
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allign: allign
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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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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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// strings.Builder version of format_fl
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[manualfree]
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pub fn format_fl_old(f f64, p BF_param) string {
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unsafe {
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mut s := ''
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// mut fs := "1.2343"
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mut fs := f64_to_str_lnd1(if f >= 0.0 { f } else { -f }, p.len1)
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// println("Dario")
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// println(fs)
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// error!!
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if fs[0] == `[` {
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s.free()
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return fs
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}
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if p.rm_tail_zero {
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tmp := fs
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fs = remove_tail_zeros_old(fs)
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tmp.free()
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}
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mut res := strings.new_builder(if p.len0 > fs.len { p.len0 } else { fs.len })
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mut sign_len_diff := 0
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if p.pad_ch == `0` {
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if p.positive {
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if p.sign_flag {
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res.write_b(`+`)
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sign_len_diff = -1
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}
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} else {
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res.write_b(`-`)
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sign_len_diff = -1
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}
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tmp := s
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s = fs.clone()
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tmp.free()
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} else {
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if p.positive {
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if p.sign_flag {
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tmp := s
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s = '+' + fs
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tmp.free()
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} else {
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tmp := s
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s = fs.clone()
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tmp.free()
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}
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} else {
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tmp := s
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s = '-' + fs
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tmp.free()
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}
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}
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dif := p.len0 - s.len + sign_len_diff
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|
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if p.allign == .right {
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for i1 := 0; i1 < dif; i1++ {
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res.write_b(p.pad_ch)
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}
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}
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res.write_string(s)
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if p.allign == .left {
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for i1 := 0; i1 < dif; i1++ {
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res.write_b(p.pad_ch)
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}
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}
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s.free()
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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()
|
|
}
|