module builtin import strconv import strings /*============================================================================= Copyright (c) 2019-2022 Dario Deledda. All rights reserved. Use of this source code is governed by an MIT license that can be found in the LICENSE file. This file contains string interpolation V functions =============================================================================*/ /*============================================================================ Enum format types max 0x1F => 32 types =============================================================================*/ pub enum StrIntpType { si_no_str = 0 // no parameter to print only fix string si_c si_u8 si_i8 si_u16 si_i16 si_u32 si_i32 si_u64 si_i64 si_e32 si_e64 si_f32 si_f64 si_g32 si_g64 si_s si_p si_vp } pub fn (x StrIntpType) str() string { return match x { .si_no_str { 'no_str' } .si_c { 'c' } .si_u8 { 'u8' } .si_i8 { 'i8' } .si_u16 { 'u16' } .si_i16 { 'i16' } .si_u32 { 'u32' } .si_i32 { 'i32' } .si_u64 { 'u64' } .si_i64 { 'i64' } .si_f32 { 'f32' } .si_f64 { 'f64' } .si_g32 { 'f32' } // g32 format use f32 data .si_g64 { 'f64' } // g64 format use f64 data .si_e32 { 'f32' } // e32 format use f32 data .si_e64 { 'f64' } // e64 format use f64 data .si_s { 's' } .si_p { 'p' } .si_vp { 'vp' } } } // Union data used by StrIntpData pub union StrIntpMem { pub mut: d_c u32 d_u8 byte d_i8 i8 d_u16 u16 d_i16 i16 d_u32 u32 d_i32 int d_u64 u64 d_i64 i64 d_f32 f32 d_f64 f64 d_s string d_p voidptr d_vp voidptr } [inline] fn fabs32(x f32) f32 { return if x < 0 { -x } else { x } } [inline] fn fabs64(x f64) f64 { return if x < 0 { -x } else { x } } [inline] fn abs64(x i64) u64 { return if x < 0 { u64(-x) } else { u64(x) } } // u32/u64 bit compact format //___ 32 24 16 8 //___ | | | | //_3333333333222222222211111111110000000000 //_9876543210987654321098765432109876543210 //_nPPPPPPPPBBBBWWWWWWWWWWTDDDDDDDSUAA===== // = data type 5 bit max 32 data type // A allign 2 bit Note: for now only 1 used! // U uppercase 1 bit 0 do nothing, 1 do to_upper() // S sign 1 bit show the sign if positive // D decimals 7 bit number of decimals digit to show // T tail zeros 1 bit 1 remove tail zeros, 0 do nothing // W Width 10 bit number of char for padding and indentation // B num base 4 bit start from 2, 0 for base 10 // P pad char 1/8 bit padding char (in u32 format reduced to 1 bit as flag for `0` padding) // -------------- // TOTAL: 39/32 bit //--------------------------------------- // convert from data format to compact u64 pub fn get_str_intp_u64_format(fmt_type StrIntpType, in_width int, in_precision int, in_tail_zeros bool, in_sign bool, in_pad_ch byte, in_base int, in_upper_case bool) u64 { width := if in_width != 0 { abs64(in_width) } else { u64(0) } allign := if in_width > 0 { u64(1 << 5) } else { u64(0) } // two bit 0 .left 1 .rigth, for now we use only one upper_case := if in_upper_case { u64(1 << 7) } else { u64(0) } sign := if in_sign { u64(1 << 8) } else { u64(0) } precision := if in_precision != 987698 { (u64(in_precision & 0x7F) << 9) } else { u64(0x7F) << 9 } tail_zeros := if in_tail_zeros { u32(1) << 16 } else { u32(0) } base := u64(u32(in_base & 0xf) << 27) res := u64((u64(fmt_type) & 0x1F) | allign | upper_case | sign | precision | tail_zeros | (u64(width & 0x3FF) << 17) | base | (u64(in_pad_ch) << 31)) return res } // convert from data format to compact u32 pub fn get_str_intp_u32_format(fmt_type StrIntpType, in_width int, in_precision int, in_tail_zeros bool, in_sign bool, in_pad_ch byte, in_base int, in_upper_case bool) u32 { width := if in_width != 0 { abs64(in_width) } else { u32(0) } allign := if in_width > 0 { u32(1 << 5) } else { u32(0) } // two bit 0 .left 1 .rigth, for now we use only one upper_case := if in_upper_case { u32(1 << 7) } else { u32(0) } sign := if in_sign { u32(1 << 8) } else { u32(0) } precision := if in_precision != 987698 { (u32(in_precision & 0x7F) << 9) } else { u32(0x7F) << 9 } tail_zeros := if in_tail_zeros { u32(1) << 16 } else { u32(0) } base := u32(u32(in_base & 0xf) << 27) res := u32((u32(fmt_type) & 0x1F) | allign | upper_case | sign | precision | tail_zeros | (u32(width & 0x3FF) << 17) | base | (u32(in_pad_ch & 1) << 31)) return res } // convert from struct to formated string [manualfree] fn (data &StrIntpData) process_str_intp_data(mut sb strings.Builder) { x := data.fmt typ := unsafe { StrIntpType(x & 0x1F) } allign := int((x >> 5) & 0x01) upper_case := ((x >> 7) & 0x01) > 0 sign := int((x >> 8) & 0x01) precision := int((x >> 9) & 0x7F) tail_zeros := ((x >> 16) & 0x01) > 0 width := int(i16((x >> 17) & 0x3FF)) mut base := int(x >> 27) & 0xF fmt_pad_ch := u8((x >> 31) & 0xFF) // no string interpolation is needed, return empty string if typ == .si_no_str { return } // if width > 0 { println("${x.hex()} Type: ${x & 0x7F} Width: ${width} Precision: ${precision} allign:${allign}") } // manage base if any if base > 0 { base += 2 // we start from 2, 0 == base 10 } // mange pad char, for now only 0 allowed mut pad_ch := u8(` `) if fmt_pad_ch > 0 { // pad_ch = fmt_pad_ch pad_ch = `0` } len0_set := if width > 0 { width } else { -1 } len1_set := if precision == 0x7F { -1 } else { precision } sign_set := sign == 1 mut bf := strconv.BF_param{ pad_ch: pad_ch // padding char len0: len0_set // default len for whole the number or string len1: len1_set // number of decimal digits, if needed positive: true // mandatory: the sign of the number passed sign_flag: sign_set // flag for print sign as prefix in padding allign: .left // alignment of the string rm_tail_zero: tail_zeros // false // remove the tail zeros from floats } // allign if fmt_pad_ch == 0 { match allign { 0 { bf.allign = .left } 1 { bf.allign = .right } // 2 { bf.allign = .center } else { bf.allign = .left } } } else { bf.allign = .right } unsafe { // strings if typ == .si_s { mut s := '' if upper_case { s = data.d.d_s.to_upper() } else { s = data.d.d_s.clone() } if width == 0 { sb.write_string(s) } else { strconv.format_str_sb(s, bf, mut sb) } s.free() return } // signed int if typ in [.si_i8, .si_i16, .si_i32, .si_i64] { mut d := data.d.d_i64 if typ == .si_i8 { d = i64(data.d.d_i8) } else if typ == .si_i16 { d = i64(data.d.d_i16) } else if typ == .si_i32 { d = i64(data.d.d_i32) } if base == 0 { if width == 0 { d_str := d.str() sb.write_string(d_str) d_str.free() return } if d < 0 { bf.positive = false } strconv.format_dec_sb(abs64(d), bf, mut sb) } else { // binary, we use 3 for binary if base == 3 { base = 2 } mut absd, mut write_minus := d, false if d < 0 && pad_ch != ` ` { absd = -d write_minus = true } mut hx := strconv.format_int(absd, base) if upper_case { tmp := hx hx = hx.to_upper() tmp.free() } if write_minus { sb.write_u8(`-`) bf.len0-- // compensate for the `-` above } if width == 0 { sb.write_string(hx) } else { strconv.format_str_sb(hx, bf, mut sb) } hx.free() } return } // unsigned int and pointers if typ in [.si_u8, .si_u16, .si_u32, .si_u64] { mut d := data.d.d_u64 if typ == .si_u8 { d = u64(data.d.d_u8) } else if typ == .si_u16 { d = u64(data.d.d_u16) } else if typ == .si_u32 { d = u64(data.d.d_u32) } if base == 0 { if width == 0 { d_str := d.str() sb.write_string(d_str) d_str.free() return } strconv.format_dec_sb(d, bf, mut sb) } else { // binary, we use 3 for binary if base == 3 { base = 2 } mut hx := strconv.format_uint(d, base) if upper_case { tmp := hx hx = hx.to_upper() tmp.free() } if width == 0 { sb.write_string(hx) } else { strconv.format_str_sb(hx, bf, mut sb) } hx.free() } return } // pointers if typ == .si_p { mut d := data.d.d_u64 base = 16 // TODO: **** decide the behaviour of this flag! **** if base == 0 { if width == 0 { d_str := d.str() sb.write_string(d_str) d_str.free() return } strconv.format_dec_sb(d, bf, mut sb) } else { mut hx := strconv.format_uint(d, base) if upper_case { tmp := hx hx = hx.to_upper() tmp.free() } if width == 0 { sb.write_string(hx) } else { strconv.format_str_sb(hx, bf, mut sb) } hx.free() } return } // default settings for floats mut use_default_str := false if width == 0 && precision == 0x7F { bf.len1 = 3 use_default_str = true } if bf.len1 < 0 { bf.len1 = 3 } match typ { // floating point .si_f32 { $if !nofloat ? { // println("HERE: f32") if use_default_str { mut f := data.d.d_f32.str() if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } else { // println("HERE: f32 format") // println(data.d.d_f32) if data.d.d_f32 < 0 { bf.positive = false } mut f := strconv.format_fl(data.d.d_f32, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } } .si_f64 { $if !nofloat ? { // println("HERE: f64") if use_default_str { mut f := data.d.d_f64.str() if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } else { if data.d.d_f64 < 0 { bf.positive = false } f_union := strconv.Float64u{ f: data.d.d_f64 } if f_union.u == strconv.double_minus_zero { bf.positive = false } mut f := strconv.format_fl(data.d.d_f64, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } } .si_g32 { // println("HERE: g32") if use_default_str { $if !nofloat ? { mut f := data.d.d_f32.strg() if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } else { // Manage +/-0 if data.d.d_f32 == strconv.single_plus_zero { tmp_str := '0' strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() return } if data.d.d_f32 == strconv.single_minus_zero { tmp_str := '-0' strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() return } // Manage +/-INF if data.d.d_f32 == strconv.single_plus_infinity { mut tmp_str := '+inf' if upper_case { tmp_str = '+INF' } strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() } if data.d.d_f32 == strconv.single_minus_infinity { mut tmp_str := '-inf' if upper_case { tmp_str = '-INF' } strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() } if data.d.d_f32 < 0 { bf.positive = false } d := fabs32(data.d.d_f32) if d < 999_999.0 && d >= 0.00001 { mut f := strconv.format_fl(data.d.d_f32, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() return } mut f := strconv.format_es(data.d.d_f32, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } .si_g64 { // println("HERE: g64") if use_default_str { $if !nofloat ? { mut f := data.d.d_f64.strg() if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } else { // Manage +/-0 if data.d.d_f64 == strconv.double_plus_zero { tmp_str := '0' strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() return } if data.d.d_f64 == strconv.double_minus_zero { tmp_str := '-0' strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() return } // Manage +/-INF if data.d.d_f64 == strconv.double_plus_infinity { mut tmp_str := '+inf' if upper_case { tmp_str = '+INF' } strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() } if data.d.d_f64 == strconv.double_minus_infinity { mut tmp_str := '-inf' if upper_case { tmp_str = '-INF' } strconv.format_str_sb(tmp_str, bf, mut sb) tmp_str.free() } if data.d.d_f64 < 0 { bf.positive = false } d := fabs64(data.d.d_f64) if d < 999_999.0 && d >= 0.00001 { mut f := strconv.format_fl(data.d.d_f64, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() return } mut f := strconv.format_es(data.d.d_f64, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } .si_e32 { $if !nofloat ? { // println("HERE: e32") bf.len1 = 6 if use_default_str { mut f := data.d.d_f32.str() if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } else { if data.d.d_f32 < 0 { bf.positive = false } mut f := strconv.format_es(data.d.d_f32, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } } .si_e64 { $if !nofloat ? { // println("HERE: e64") bf.len1 = 6 if use_default_str { mut f := data.d.d_f64.str() if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } else { if data.d.d_f64 < 0 { bf.positive = false } mut f := strconv.format_es(data.d.d_f64, bf) if upper_case { tmp := f f = f.to_upper() tmp.free() } sb.write_string(f) f.free() } } } // runes .si_c { ss := utf32_to_str(data.d.d_c) sb.write_string(ss) ss.free() } // v pointers .si_vp { ss := u64(data.d.d_vp).hex() sb.write_string(ss) ss.free() } else { sb.write_string('***ERROR!***') } } } } //-------------------------------------------------- // storing struct used by cgen pub struct StrIntpCgenData { pub: str string fmt string d string } // NOTE: LOW LEVEL struct // storing struct passed to V in the C code pub struct StrIntpData { pub: str string // fmt u64 // expanded version for future use, 64 bit fmt u32 d StrIntpMem } // interpolation function [direct_array_access; manualfree] pub fn str_intp(data_len int, input_base &StrIntpData) string { mut res := strings.new_builder(256) for i := 0; i < data_len; i++ { data := unsafe { &input_base[i] } // avoid empty strings if data.str.len != 0 { res.write_string(data.str) } // skip empty data if data.fmt != 0 { data.process_str_intp_data(mut res) } } ret := res.str() unsafe { res.free() } return ret } // The consts here are utilities for the compiler's "auto_str_methods.v". // They are used to substitute old _STR calls. // FIXME: this const is not released from memory => use a precalculated string const for now. // si_s_code = "0x" + int(StrIntpType.si_s).hex() // code for a simple string. pub const ( si_s_code = '0xfe10' si_g32_code = '0xfe0e' si_g64_code = '0xfe0f' ) [inline] pub fn str_intp_sq(in_str string) string { return 'str_intp(2, _MOV((StrIntpData[]){{_SLIT("\'"), ${si_s_code}, {.d_s = ${in_str}}},{_SLIT("\'"), 0, {.d_c = 0 }}}))' } [inline] pub fn str_intp_rune(in_str string) string { return 'str_intp(2, _MOV((StrIntpData[]){{_SLIT("\`"), ${si_s_code}, {.d_s = ${in_str}}},{_SLIT("\`"), 0, {.d_c = 0 }}}))' } [inline] pub fn str_intp_g32(in_str string) string { return 'str_intp(1, _MOV((StrIntpData[]){{_SLIT0, ${si_g32_code}, {.d_f32 = ${in_str} }}}))' } [inline] pub fn str_intp_g64(in_str string) string { return 'str_intp(1, _MOV((StrIntpData[]){{_SLIT0, ${si_g64_code}, {.d_f64 = ${in_str} }}}))' } // replace %% with the in_str [manualfree] pub fn str_intp_sub(base_str string, in_str string) string { index := base_str.index('%%') or { eprintln('No strin interpolation %% parameteres') exit(1) } // return base_str[..index] + in_str + base_str[index+2..] unsafe { st_str := base_str[..index] if index + 2 < base_str.len { en_str := base_str[index + 2..] res_str := 'str_intp(2, _MOV((StrIntpData[]){{_SLIT("${st_str}"), ${si_s_code}, {.d_s = ${in_str} }},{_SLIT("${en_str}"), 0, {.d_c = 0}}}))' st_str.free() en_str.free() return res_str } res2_str := 'str_intp(1, _MOV((StrIntpData[]){{_SLIT("${st_str}"), ${si_s_code}, {.d_s = ${in_str} }}}))' st_str.free() return res2_str } }