mirror of
https://github.com/odin-lang/Odin.git
synced 2025-12-29 01:14:40 +00:00
1706 lines
36 KiB
Odin
1706 lines
36 KiB
Odin
package strconv
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import "core:unicode/utf8"
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import "decimal"
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/*
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Parses a boolean value from the input string
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**Inputs**
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- s: The input string
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- true: "1", "t", "T", "true", "TRUE", "True"
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- false: "0", "f", "F", "false", "FALSE", "False"
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- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
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**Returns**
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- result: The parsed boolean value (default: false)
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- ok: A boolean indicating whether the parsing was successful
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*/
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parse_bool :: proc(s: string, n: ^int = nil) -> (result: bool = false, ok: bool) {
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switch s {
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case "1", "t", "T", "true", "TRUE", "True":
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if n != nil { n^ = len(s) }
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return true, true
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case "0", "f", "F", "false", "FALSE", "False":
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if n != nil { n^ = len(s) }
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return false, true
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}
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return
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}
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/*
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Finds the integer value of the given rune
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**Inputs**
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- r: The input rune to find the integer value of
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**Returns** The integer value of the given rune
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*/
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_digit_value :: proc(r: rune) -> int {
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ri := int(r)
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v: int = 16
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switch r {
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case '0'..='9': v = ri-'0'
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case 'a'..='z': v = ri-'a'+10
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case 'A'..='Z': v = ri-'A'+10
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}
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return v
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}
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/*
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Parses an integer value from the input string in the given base, without a prefix
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**Inputs**
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- str: The input string to parse the integer value from
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- base: The base of the integer value to be parsed (must be between 1 and 16)
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- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_i64_of_base_example :: proc() {
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n, ok := strconv.parse_i64_of_base("-1234e3", 10)
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fmt.println(n, ok)
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}
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Output:
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-1234 false
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**Returns**
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- value: Parses an integer value from a string, in the given base, without a prefix.
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- ok: ok=false if no numeric value of the appropriate base could be found, or if the input string contained more than just the number.
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*/
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parse_i64_of_base :: proc(str: string, base: int, n: ^int = nil) -> (value: i64, ok: bool) {
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assert(base <= 16, "base must be 1-16")
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s := str
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defer if n != nil { n^ = len(str)-len(s) }
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if s == "" {
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return
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}
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neg := false
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if len(s) > 1 {
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switch s[0] {
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case '-':
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neg = true
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s = s[1:]
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case '+':
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s = s[1:]
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}
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}
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i := 0
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for r in s {
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if r == '_' {
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i += 1
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continue
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}
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v := i64(_digit_value(r))
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if v >= i64(base) {
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break
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}
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value *= i64(base)
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value += v
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i += 1
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}
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s = s[i:]
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if neg {
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value = -value
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}
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ok = len(s) == 0
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return
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}
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/*
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Parses an integer value from the input string in base 10, unless there's a prefix
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**Inputs**
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- str: The input string to parse the integer value from
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- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_i64_maybe_prefixed_example :: proc() {
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n, ok := strconv.parse_i64_maybe_prefixed("1234")
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fmt.println(n,ok)
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n, ok = strconv.parse_i64_maybe_prefixed("0xeeee")
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fmt.println(n,ok)
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}
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Output:
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1234 true
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61166 true
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**Returns**
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- value: The parsed integer value
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- ok: ok=false if a valid integer could not be found, or if the input string contained more than just the number.
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*/
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parse_i64_maybe_prefixed :: proc(str: string, n: ^int = nil) -> (value: i64, ok: bool) {
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s := str
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defer if n != nil { n^ = len(str)-len(s) }
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if s == "" {
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return
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}
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neg := false
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if len(s) > 1 {
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switch s[0] {
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case '-':
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neg = true
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s = s[1:]
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case '+':
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s = s[1:]
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}
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}
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base: i64 = 10
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if len(s) > 2 && s[0] == '0' {
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switch s[1] {
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case 'b': base = 2; s = s[2:]
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case 'o': base = 8; s = s[2:]
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case 'd': base = 10; s = s[2:]
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case 'z': base = 12; s = s[2:]
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case 'x': base = 16; s = s[2:]
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}
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}
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i := 0
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for r in s {
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if r == '_' {
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i += 1
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continue
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}
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v := i64(_digit_value(r))
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if v >= base {
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break
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}
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value *= base
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value += v
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i += 1
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}
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s = s[i:]
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if neg {
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value = -value
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}
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ok = len(s) == 0
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return
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}
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//
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parse_i64 :: proc{parse_i64_maybe_prefixed, parse_i64_of_base}
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/*
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Parses an unsigned 64-bit integer value from the input string without a prefix, using the specified base
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**Inputs**
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- str: The input string to parse
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- base: The base of the number system to use for parsing
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- Must be between 1 and 16 (inclusive)
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- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_u64_of_base_example :: proc() {
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n, ok := strconv.parse_u64_of_base("1234e3", 10)
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fmt.println(n,ok)
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n, ok = strconv.parse_u64_of_base("5678eee",16)
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fmt.println(n,ok)
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}
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Output:
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1234 false
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90672878 true
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**Returns**
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- value: The parsed uint64 value
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- ok: A boolean indicating whether the parsing was successful
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*/
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parse_u64_of_base :: proc(str: string, base: int, n: ^int = nil) -> (value: u64, ok: bool) {
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assert(base <= 16, "base must be 1-16")
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s := str
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defer if n != nil { n^ = len(str)-len(s) }
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if s == "" {
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return
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}
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if len(s) > 1 && s[0] == '+' {
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s = s[1:]
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}
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i := 0
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for r in s {
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if r == '_' {
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i += 1
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continue
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}
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v := u64(_digit_value(r))
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if v >= u64(base) {
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break
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}
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value *= u64(base)
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value += v
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i += 1
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}
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s = s[i:]
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ok = len(s) == 0
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return
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}
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/*
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Parses an unsigned 64-bit integer value from the input string, using the specified base or inferring the base from a prefix
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**Inputs**
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- str: The input string to parse
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- base: The base of the number system to use for parsing (default: 0)
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- If base is 0, it will be inferred based on the prefix in the input string (e.g. '0x' for hexadecimal)
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- If base is not 0, it will be used for parsing regardless of any prefix in the input string
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- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_u64_maybe_prefixed_example :: proc() {
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n, ok := strconv.parse_u64_maybe_prefixed("1234")
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fmt.println(n,ok)
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n, ok = strconv.parse_u64_maybe_prefixed("0xee")
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fmt.println(n,ok)
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}
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Output:
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1234 true
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238 true
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**Returns**
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- value: The parsed uint64 value
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- ok: ok=false if a valid integer could not be found, if the value was negative, or if the input string contained more than just the number.
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*/
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parse_u64_maybe_prefixed :: proc(str: string, n: ^int = nil) -> (value: u64, ok: bool) {
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s := str
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defer if n != nil { n^ = len(str)-len(s) }
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if s == "" {
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return
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}
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if len(s) > 1 && s[0] == '+' {
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s = s[1:]
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}
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base := u64(10)
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if len(s) > 2 && s[0] == '0' {
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switch s[1] {
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case 'b': base = 2; s = s[2:]
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case 'o': base = 8; s = s[2:]
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case 'd': base = 10; s = s[2:]
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case 'z': base = 12; s = s[2:]
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case 'x': base = 16; s = s[2:]
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}
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}
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i := 0
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for r in s {
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if r == '_' {
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i += 1
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continue
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}
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v := u64(_digit_value(r))
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if v >= base {
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break
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}
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value *= base
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value += v
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i += 1
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}
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s = s[i:]
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ok = len(s) == 0
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return
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}
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//
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parse_u64 :: proc{parse_u64_maybe_prefixed, parse_u64_of_base}
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/*
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Parses a signed integer value from the input string, using the specified base or inferring the base from a prefix
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**Inputs**
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- s: The input string to parse
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- base: The base of the number system to use for parsing (default: 0)
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- If base is 0, it will be inferred based on the prefix in the input string (e.g. '0x' for hexadecimal)
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- If base is not 0, it will be used for parsing regardless of any prefix in the input string
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_int_example :: proc() {
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n, ok := strconv.parse_int("1234") // without prefix, inferred base 10
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fmt.println(n,ok)
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n, ok = strconv.parse_int("ffff", 16) // without prefix, explicit base
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fmt.println(n,ok)
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n, ok = strconv.parse_int("0xffff") // with prefix and inferred base
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fmt.println(n,ok)
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}
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Output:
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1234 true
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65535 true
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65535 true
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**Returns**
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- value: The parsed int value
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- ok: `false` if no appropriate value could be found, or if the input string contained more than just the number.
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*/
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parse_int :: proc(s: string, base := 0, n: ^int = nil) -> (value: int, ok: bool) {
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v: i64 = ---
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switch base {
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case 0: v, ok = parse_i64_maybe_prefixed(s, n)
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case: v, ok = parse_i64_of_base(s, base, n)
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}
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value = int(v)
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return
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}
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/*
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Parses an unsigned integer value from the input string, using the specified base or inferring the base from a prefix
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**Inputs**
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- s: The input string to parse
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- base: The base of the number system to use for parsing (default: 0, inferred)
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- If base is 0, it will be inferred based on the prefix in the input string (e.g. '0x' for hexadecimal)
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- If base is not 0, it will be used for parsing regardless of any prefix in the input string
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_uint_example :: proc() {
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n, ok := strconv.parse_uint("1234") // without prefix, inferred base 10
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fmt.println(n,ok)
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n, ok = strconv.parse_uint("ffff", 16) // without prefix, explicit base
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fmt.println(n,ok)
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n, ok = strconv.parse_uint("0xffff") // with prefix and inferred base
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fmt.println(n,ok)
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}
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Output:
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1234 true
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65535 true
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65535 true
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**Returns**
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value: The parsed uint value
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ok: `false` if no appropriate value could be found; the value was negative; he input string contained more than just the number
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*/
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parse_uint :: proc(s: string, base := 0, n: ^int = nil) -> (value: uint, ok: bool) {
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v: u64 = ---
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switch base {
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case 0: v, ok = parse_u64_maybe_prefixed(s, n)
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case: v, ok = parse_u64_of_base(s, base, n)
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}
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value = uint(v)
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return
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}
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/*
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Parses an integer value from a string in the given base, without any prefix
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**Inputs**
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- str: The input string containing the integer value
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- base: The base (radix) to use for parsing the integer (1-16)
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- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_i128_of_base_example :: proc() {
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n, ok := strconv.parse_i128_of_base("-1234eeee", 10)
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fmt.println(n,ok)
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}
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Output:
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-1234 false
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**Returns**
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- value: The parsed i128 value
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- ok: false if no numeric value of the appropriate base could be found, or if the input string contained more than just the number.
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*/
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parse_i128_of_base :: proc(str: string, base: int, n: ^int = nil) -> (value: i128, ok: bool) {
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assert(base <= 16, "base must be 1-16")
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s := str
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defer if n != nil { n^ = len(str)-len(s) }
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if s == "" {
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return
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}
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neg := false
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if len(s) > 1 {
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switch s[0] {
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case '-':
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neg = true
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s = s[1:]
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case '+':
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s = s[1:]
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}
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}
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i := 0
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for r in s {
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if r == '_' {
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i += 1
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continue
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}
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v := i128(_digit_value(r))
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if v >= i128(base) {
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break
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}
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value *= i128(base)
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value += v
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i += 1
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}
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s = s[i:]
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if neg {
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value = -value
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}
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ok = len(s) == 0
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return
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}
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/*
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Parses an integer value from a string in base 10, unless there's a prefix
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**Inputs**
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- str: The input string containing the integer value
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- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
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Example:
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import "core:fmt"
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import "core:strconv"
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parse_i128_maybe_prefixed_example :: proc() {
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n, ok := strconv.parse_i128_maybe_prefixed("1234")
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fmt.println(n, ok)
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n, ok = strconv.parse_i128_maybe_prefixed("0xeeee")
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fmt.println(n, ok)
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}
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Output:
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1234 true
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61166 true
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**Returns**
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- value: The parsed i128 value
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- ok: `false` if a valid integer could not be found, or if the input string contained more than just the number.
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*/
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parse_i128_maybe_prefixed :: proc(str: string, n: ^int = nil) -> (value: i128, ok: bool) {
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s := str
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defer if n != nil { n^ = len(str)-len(s) }
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if s == "" {
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return
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}
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neg := false
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if len(s) > 1 {
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switch s[0] {
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case '-':
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neg = true
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s = s[1:]
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case '+':
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s = s[1:]
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}
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}
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base: i128 = 10
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if len(s) > 2 && s[0] == '0' {
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switch s[1] {
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case 'b': base = 2; s = s[2:]
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case 'o': base = 8; s = s[2:]
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case 'd': base = 10; s = s[2:]
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case 'z': base = 12; s = s[2:]
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case 'x': base = 16; s = s[2:]
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}
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}
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i := 0
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for r in s {
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if r == '_' {
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i += 1
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continue
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}
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v := i128(_digit_value(r))
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if v >= base {
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break
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}
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value *= base
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value += v
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i += 1
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}
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s = s[i:]
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if neg {
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value = -value
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}
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ok = len(s) == 0
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return
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}
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//
|
|
parse_i128 :: proc{parse_i128_maybe_prefixed, parse_i128_of_base}
|
|
/*
|
|
Parses an unsigned integer value from a string in the given base, without any prefix
|
|
|
|
**Inputs**
|
|
- str: The input string containing the integer value
|
|
- base: The base (radix) to use for parsing the integer (1-16)
|
|
- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
parse_u128_of_base_example :: proc() {
|
|
n, ok := strconv.parse_u128_of_base("1234eeee", 10)
|
|
fmt.println(n, ok)
|
|
|
|
n, ok = strconv.parse_u128_of_base("5678eeee", 16)
|
|
fmt.println(n, ok)
|
|
}
|
|
|
|
Output:
|
|
|
|
1234 false
|
|
1450766062 true
|
|
|
|
**Returns**
|
|
- value: The parsed u128 value
|
|
- ok: `false` if no numeric value of the appropriate base could be found, or if the input string contained more than just the number.
|
|
*/
|
|
parse_u128_of_base :: proc(str: string, base: int, n: ^int = nil) -> (value: u128, ok: bool) {
|
|
assert(base <= 16, "base must be 1-16")
|
|
s := str
|
|
defer if n != nil { n^ = len(str)-len(s) }
|
|
if s == "" {
|
|
return
|
|
}
|
|
|
|
if len(s) > 1 && s[0] == '+' {
|
|
s = s[1:]
|
|
}
|
|
|
|
i := 0
|
|
for r in s {
|
|
if r == '_' {
|
|
i += 1
|
|
continue
|
|
}
|
|
v := u128(_digit_value(r))
|
|
if v >= u128(base) {
|
|
break
|
|
}
|
|
value *= u128(base)
|
|
value += v
|
|
i += 1
|
|
}
|
|
s = s[i:]
|
|
|
|
ok = len(s) == 0
|
|
return
|
|
}
|
|
/*
|
|
Parses an unsigned integer value from a string in base 10, unless there's a prefix
|
|
|
|
**Inputs**
|
|
- str: The input string containing the integer value
|
|
- n: An optional pointer to an int to store the length of the parsed substring (default: nil)
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
parse_u128_maybe_prefixed_example :: proc() {
|
|
n, ok := strconv.parse_u128_maybe_prefixed("1234")
|
|
fmt.println(n, ok)
|
|
|
|
n, ok = strconv.parse_u128_maybe_prefixed("5678eeee")
|
|
fmt.println(n, ok)
|
|
}
|
|
|
|
Output:
|
|
|
|
1234 true
|
|
5678 false
|
|
|
|
**Returns**
|
|
- value: The parsed u128 value
|
|
- ok: false if a valid integer could not be found, if the value was negative, or if the input string contained more than just the number.
|
|
*/
|
|
parse_u128_maybe_prefixed :: proc(str: string, n: ^int = nil) -> (value: u128, ok: bool) {
|
|
s := str
|
|
defer if n != nil { n^ = len(str)-len(s) }
|
|
if s == "" {
|
|
return
|
|
}
|
|
|
|
if len(s) > 1 && s[0] == '+' {
|
|
s = s[1:]
|
|
}
|
|
|
|
|
|
base := u128(10)
|
|
if len(s) > 2 && s[0] == '0' {
|
|
switch s[1] {
|
|
case 'b': base = 2; s = s[2:]
|
|
case 'o': base = 8; s = s[2:]
|
|
case 'd': base = 10; s = s[2:]
|
|
case 'z': base = 12; s = s[2:]
|
|
case 'x': base = 16; s = s[2:]
|
|
}
|
|
}
|
|
|
|
i := 0
|
|
for r in s {
|
|
if r == '_' {
|
|
i += 1
|
|
continue
|
|
}
|
|
v := u128(_digit_value(r))
|
|
if v >= base {
|
|
break
|
|
}
|
|
value *= base
|
|
value += v
|
|
i += 1
|
|
}
|
|
s = s[i:]
|
|
|
|
ok = len(s) == 0
|
|
return
|
|
}
|
|
//
|
|
parse_u128 :: proc{parse_u128_maybe_prefixed, parse_u128_of_base}
|
|
/*
|
|
Converts a byte to lowercase
|
|
|
|
**Inputs**
|
|
- ch: A byte character to be converted to lowercase.
|
|
|
|
**Returns**
|
|
- A lowercase byte character.
|
|
*/
|
|
@(private)
|
|
lower :: #force_inline proc "contextless" (ch: byte) -> byte { return ('a' - 'A') | ch }
|
|
/*
|
|
Parses a 32-bit floating point number from a string
|
|
|
|
**Inputs**
|
|
- s: The input string containing a 32-bit floating point number.
|
|
- n: An optional pointer to an int to store the length of the parsed substring (default: nil).
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
parse_f32_example :: proc() {
|
|
n, ok := strconv.parse_f32("1234eee")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
|
|
n, ok = strconv.parse_f32("5678e2")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
}
|
|
|
|
Output:
|
|
|
|
0.000 false
|
|
567800.000 true
|
|
|
|
**Returns**
|
|
- value: The parsed 32-bit floating point number.
|
|
- ok: `false` if a base 10 float could not be found, or if the input string contained more than just the number.
|
|
*/
|
|
parse_f32 :: proc(s: string, n: ^int = nil) -> (value: f32, ok: bool) {
|
|
v: f64 = ---
|
|
v, ok = parse_f64(s, n)
|
|
return f32(v), ok
|
|
}
|
|
/*
|
|
Parses a 64-bit floating point number from a string
|
|
|
|
**Inputs**
|
|
- str: The input string containing a 64-bit floating point number.
|
|
- n: An optional pointer to an int to store the length of the parsed substring (default: nil).
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
parse_f64_example :: proc() {
|
|
n, ok := strconv.parse_f64("1234eee")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
|
|
n, ok = strconv.parse_f64("5678e2")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
}
|
|
|
|
Output:
|
|
|
|
0.000 false
|
|
567800.000 true
|
|
|
|
**Returns**
|
|
- value: The parsed 64-bit floating point number.
|
|
- ok: `false` if a base 10 float could not be found, or if the input string contained more than just the number.
|
|
*/
|
|
parse_f64 :: proc(str: string, n: ^int = nil) -> (value: f64, ok: bool) {
|
|
nr: int
|
|
value, nr, ok = parse_f64_prefix(str)
|
|
if ok && len(str) != nr {
|
|
ok = false
|
|
}
|
|
if n != nil { n^ = nr }
|
|
return
|
|
}
|
|
/*
|
|
Parses a 32-bit floating point number from a string and returns the parsed number, the length of the parsed substring, and a boolean indicating whether the parsing was successful
|
|
|
|
**Inputs**
|
|
- str: The input string containing a 32-bit floating point number.
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
parse_f32_prefix_example :: proc() {
|
|
n, _, ok := strconv.parse_f32_prefix("1234eee")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
|
|
n, _, ok = strconv.parse_f32_prefix("5678e2")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
}
|
|
|
|
Output:
|
|
|
|
0.000 false
|
|
567800.000 true
|
|
|
|
|
|
**Returns**
|
|
- value: The parsed 32-bit floating point number.
|
|
- nr: The length of the parsed substring.
|
|
- ok: A boolean indicating whether the parsing was successful.
|
|
*/
|
|
parse_f32_prefix :: proc(str: string) -> (value: f32, nr: int, ok: bool) {
|
|
f: f64
|
|
f, nr, ok = parse_f64_prefix(str)
|
|
value = f32(f)
|
|
return
|
|
}
|
|
/*
|
|
Parses a 64-bit floating point number from a string and returns the parsed number, the length of the parsed substring, and a boolean indicating whether the parsing was successful
|
|
|
|
**Inputs**
|
|
- str: The input string containing a 64-bit floating point number.
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
parse_f64_prefix_example :: proc() {
|
|
n, _, ok := strconv.parse_f64_prefix("12.34eee")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
|
|
n, _, ok = strconv.parse_f64_prefix("12.34e2")
|
|
fmt.printfln("%.3f %v", n, ok)
|
|
}
|
|
|
|
Output:
|
|
|
|
0.000 false
|
|
1234.000 true
|
|
|
|
**Returns**
|
|
- value: The parsed 64-bit floating point number.
|
|
- nr: The length of the parsed substring.
|
|
- ok: `false` if a base 10 float could not be found, or if the input string contained more than just the number.
|
|
*/
|
|
parse_f64_prefix :: proc(str: string) -> (value: f64, nr: int, ok: bool) {
|
|
common_prefix_len_ignore_case :: proc "contextless" (s, prefix: string) -> int {
|
|
n := len(prefix)
|
|
if n > len(s) {
|
|
n = len(s)
|
|
}
|
|
for i in 0..<n {
|
|
c := s[i]
|
|
if 'A' <= c && c <= 'Z' {
|
|
c += 'a' - 'A'
|
|
}
|
|
if c != prefix[i] {
|
|
return i
|
|
}
|
|
}
|
|
return n
|
|
}
|
|
check_special :: proc "contextless" (s: string) -> (f: f64, n: int, ok: bool) {
|
|
s := s
|
|
if len(s) > 0 {
|
|
sign := 1
|
|
nsign := 0
|
|
switch s[0] {
|
|
case '+', '-':
|
|
if s[0] == '-' {
|
|
sign = -1
|
|
}
|
|
nsign = 1
|
|
s = s[1:]
|
|
fallthrough
|
|
case 'i', 'I':
|
|
n = common_prefix_len_ignore_case(s, "infinity")
|
|
if 3 < n && n < 8 { // "inf" or "infinity"
|
|
n = 3
|
|
}
|
|
if n == 3 || n == 8 {
|
|
f = 0h7ff00000_00000000 if sign == 1 else 0hfff00000_00000000
|
|
n = nsign + 3
|
|
ok = true
|
|
return
|
|
}
|
|
case 'n', 'N':
|
|
if common_prefix_len_ignore_case(s, "nan") == 3 {
|
|
f = 0h7ff80000_00000001
|
|
n = nsign + 3
|
|
ok = true
|
|
return
|
|
}
|
|
}
|
|
}
|
|
return
|
|
}
|
|
parse_components :: proc "contextless" (s: string) -> (mantissa: u64, exp: int, neg, trunc, hex: bool, i: int, ok: bool) {
|
|
if len(s) == 0 {
|
|
return
|
|
}
|
|
switch s[i] {
|
|
case '+': i += 1
|
|
case '-': i += 1; neg = true
|
|
}
|
|
|
|
base := u64(10)
|
|
MAX_MANT_DIGITS := 19
|
|
exp_char := byte('e')
|
|
// support stupid 0x1.ABp100 hex floats even if Odin doesn't
|
|
if i+2 < len(s) && s[i] == '0' && lower(s[i+1]) == 'x' {
|
|
base = 16
|
|
MAX_MANT_DIGITS = 16
|
|
i += 2
|
|
exp_char = 'p'
|
|
hex = true
|
|
}
|
|
|
|
underscores := false
|
|
saw_dot, saw_digits := false, false
|
|
nd := 0
|
|
nd_mant := 0
|
|
decimal_point := 0
|
|
loop: for ; i < len(s); i += 1 {
|
|
switch c := s[i]; true {
|
|
case c == '_':
|
|
underscores = true
|
|
continue loop
|
|
case c == '.':
|
|
if saw_dot {
|
|
break loop
|
|
}
|
|
saw_dot = true
|
|
decimal_point = nd
|
|
continue loop
|
|
|
|
case '0' <= c && c <= '9':
|
|
saw_digits = true
|
|
if c == '0' && nd == 0 {
|
|
decimal_point -= 1
|
|
continue loop
|
|
}
|
|
nd += 1
|
|
if nd_mant < MAX_MANT_DIGITS {
|
|
mantissa *= base
|
|
mantissa += u64(c - '0')
|
|
nd_mant += 1
|
|
} else if c != '0' {
|
|
trunc = true
|
|
}
|
|
continue loop
|
|
case base == 16 && 'a' <= lower(c) && lower(c) <= 'f':
|
|
saw_digits = true
|
|
nd += 1
|
|
if nd_mant < MAX_MANT_DIGITS {
|
|
mantissa *= 16
|
|
mantissa += u64(lower(c) - 'a' + 10)
|
|
nd_mant += 1
|
|
} else {
|
|
trunc = true
|
|
}
|
|
continue loop
|
|
}
|
|
break loop
|
|
}
|
|
|
|
if !saw_digits {
|
|
return
|
|
}
|
|
if !saw_dot {
|
|
decimal_point = nd
|
|
}
|
|
if base == 16 {
|
|
decimal_point *= 4
|
|
nd_mant *= 4
|
|
}
|
|
|
|
if i < len(s) && lower(s[i]) == exp_char {
|
|
i += 1
|
|
if i >= len(s) { return }
|
|
exp_sign := 1
|
|
switch s[i] {
|
|
case '+': i += 1
|
|
case '-': i += 1; exp_sign = -1
|
|
}
|
|
if i >= len(s) || s[i] < '0' || s[i] > '9' {
|
|
return
|
|
}
|
|
e := 0
|
|
for ; i < len(s) && ('0' <= s[i] && s[i] <= '9' || s[i] == '_'); i += 1 {
|
|
if s[i] == '_' {
|
|
underscores = true
|
|
continue
|
|
}
|
|
if e < 1e5 {
|
|
e = e*10 + int(s[i]) - '0'
|
|
}
|
|
}
|
|
decimal_point += e * exp_sign
|
|
} else if base == 16 {
|
|
return
|
|
}
|
|
|
|
if mantissa != 0 {
|
|
exp = decimal_point - nd_mant
|
|
}
|
|
ok = true
|
|
return
|
|
}
|
|
|
|
parse_hex :: proc "contextless" (s: string, mantissa: u64, exp: int, neg, trunc: bool) -> (f64, bool) {
|
|
info := &_f64_info
|
|
|
|
mantissa, exp := mantissa, exp
|
|
|
|
MAX_EXP := 1<<info.expbits + info.bias - 2
|
|
MIN_EXP := info.bias + 1
|
|
exp += int(info.mantbits)
|
|
|
|
for mantissa != 0 && mantissa >> (info.mantbits+2) == 0 {
|
|
mantissa <<= 1
|
|
exp -= 1
|
|
}
|
|
if trunc {
|
|
mantissa |= 1
|
|
}
|
|
|
|
for mantissa != 0 && mantissa >> (info.mantbits+2) == 0 {
|
|
mantissa = mantissa>>1 | mantissa&1
|
|
exp += 1
|
|
}
|
|
|
|
// denormalize
|
|
if mantissa > 1 && exp < MIN_EXP-2 {
|
|
mantissa = mantissa>>1 | mantissa&1
|
|
exp += 1
|
|
}
|
|
|
|
round := mantissa & 3
|
|
mantissa >>= 2
|
|
round |= mantissa & 1 // round to even
|
|
exp += 2
|
|
if round == 3 {
|
|
mantissa += 1
|
|
if mantissa == 1 << (1 + info.mantbits) {
|
|
mantissa >>= 1
|
|
exp += 1
|
|
}
|
|
}
|
|
if mantissa>>info.mantbits == 0 {
|
|
// zero or denormal
|
|
exp = info.bias
|
|
}
|
|
|
|
ok := true
|
|
if exp > MAX_EXP {
|
|
// infinity or invalid
|
|
mantissa = 1<<info.mantbits
|
|
exp = MAX_EXP + 1
|
|
ok = false
|
|
}
|
|
|
|
bits := mantissa & (1<<info.mantbits - 1)
|
|
bits |= u64((exp-info.bias) & (1<<info.expbits - 1)) << info.mantbits
|
|
if neg {
|
|
bits |= 1 << info.mantbits << info.expbits
|
|
}
|
|
return transmute(f64)bits, ok
|
|
}
|
|
|
|
|
|
if value, nr, ok = check_special(str); ok {
|
|
return
|
|
}
|
|
|
|
mantissa: u64
|
|
exp: int
|
|
neg, trunc, hex: bool
|
|
mantissa, exp, neg, trunc, hex, nr = parse_components(str) or_return
|
|
|
|
if hex {
|
|
value, ok = parse_hex(str, mantissa, exp, neg, trunc)
|
|
return
|
|
}
|
|
|
|
trunc_block: if !trunc {
|
|
@static pow10 := [?]f64{
|
|
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
|
|
1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
|
|
1e20, 1e21, 1e22,
|
|
}
|
|
|
|
if mantissa>>_f64_info.mantbits != 0 {
|
|
break trunc_block
|
|
}
|
|
f := f64(mantissa)
|
|
if neg {
|
|
f = -f
|
|
}
|
|
switch {
|
|
case exp == 0:
|
|
return f, nr, true
|
|
case exp > 0 && exp <= 15+22:
|
|
if exp > 22 {
|
|
f *= pow10[exp-22]
|
|
exp = 22
|
|
}
|
|
if f > 1e15 || f < 1e-15 {
|
|
break trunc_block
|
|
}
|
|
return f * pow10[exp], nr, true
|
|
case -22 <= exp && exp < 0:
|
|
return f / pow10[-exp], nr, true
|
|
}
|
|
}
|
|
d: decimal.Decimal
|
|
decimal.set(&d, str[:nr])
|
|
b, overflow := decimal_to_float_bits(&d, &_f64_info)
|
|
value = transmute(f64)b
|
|
ok = !overflow
|
|
return
|
|
}
|
|
/*
|
|
Appends a boolean value as a string to the given buffer
|
|
|
|
**Inputs**
|
|
- buf: The buffer to append the boolean value to
|
|
- b: The boolean value to be appended
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
append_bool_example :: proc() {
|
|
buf: [6]byte
|
|
result := strconv.append_bool(buf[:], true)
|
|
fmt.println(result, buf)
|
|
}
|
|
|
|
Output:
|
|
|
|
true [116, 114, 117, 101, 0, 0]
|
|
|
|
**Returns**
|
|
- The resulting string after appending the boolean value
|
|
*/
|
|
append_bool :: proc(buf: []byte, b: bool) -> string {
|
|
n := 0
|
|
if b {
|
|
n = copy(buf, "true")
|
|
} else {
|
|
n = copy(buf, "false")
|
|
}
|
|
return string(buf[:n])
|
|
}
|
|
/*
|
|
Appends an unsigned integer value as a string to the given buffer with the specified base
|
|
|
|
**Inputs**
|
|
- buf: The buffer to append the unsigned integer value to
|
|
- u: The unsigned integer value to be appended
|
|
- base: The base to use for converting the integer value
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
append_uint_example :: proc() {
|
|
buf: [4]byte
|
|
result := strconv.append_uint(buf[:], 42, 16)
|
|
fmt.println(result, buf)
|
|
}
|
|
|
|
Output:
|
|
|
|
2a [50, 97, 0, 0]
|
|
|
|
**Returns**
|
|
- The resulting string after appending the unsigned integer value
|
|
*/
|
|
append_uint :: proc(buf: []byte, u: u64, base: int) -> string {
|
|
return append_bits(buf, u, base, false, 8*size_of(uint), digits, nil)
|
|
}
|
|
/*
|
|
Appends a signed integer value as a string to the given buffer with the specified base
|
|
|
|
**Inputs**
|
|
- buf: The buffer to append the signed integer value to
|
|
- i: The signed integer value to be appended
|
|
- base: The base to use for converting the integer value
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
append_int_example :: proc() {
|
|
buf: [4]byte
|
|
result := strconv.append_int(buf[:], -42, 10)
|
|
fmt.println(result, buf)
|
|
}
|
|
|
|
Output:
|
|
|
|
-42 [45, 52, 50, 0]
|
|
|
|
**Returns**
|
|
- The resulting string after appending the signed integer value
|
|
*/
|
|
append_int :: proc(buf: []byte, i: i64, base: int) -> string {
|
|
return append_bits(buf, u64(i), base, true, 8*size_of(int), digits, nil)
|
|
}
|
|
|
|
|
|
|
|
append_u128 :: proc(buf: []byte, u: u128, base: int) -> string {
|
|
return append_bits_128(buf, u, base, false, 8*size_of(uint), digits, nil)
|
|
}
|
|
|
|
/*
|
|
Converts an integer value to a string and stores it in the given buffer
|
|
|
|
**Inputs**
|
|
- buf: The buffer to store the resulting string
|
|
- i: The integer value to be converted
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
itoa_example :: proc() {
|
|
buf: [4]byte
|
|
result := strconv.itoa(buf[:], 42)
|
|
fmt.println(result, buf) // "42"
|
|
}
|
|
|
|
Output:
|
|
|
|
42 [52, 50, 0, 0]
|
|
|
|
**Returns**
|
|
- The resulting string after converting the integer value
|
|
*/
|
|
itoa :: proc(buf: []byte, i: int) -> string {
|
|
return append_int(buf, i64(i), 10)
|
|
}
|
|
/*
|
|
Converts a string to an integer value
|
|
|
|
**Inputs**
|
|
- s: The string to be converted
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
atoi_example :: proc() {
|
|
fmt.println(strconv.atoi("42"))
|
|
}
|
|
|
|
Output:
|
|
|
|
42
|
|
|
|
**Returns**
|
|
- The resulting integer value
|
|
*/
|
|
atoi :: proc(s: string) -> int {
|
|
v, _ := parse_int(s)
|
|
return v
|
|
}
|
|
/*
|
|
Converts a string to a float64 value
|
|
|
|
**Inputs**
|
|
- s: The string to be converted
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
atof_example :: proc() {
|
|
fmt.printfln("%.3f", strconv.atof("3.14"))
|
|
}
|
|
|
|
Output:
|
|
|
|
3.140
|
|
|
|
**Returns**
|
|
- The resulting float64 value after converting the string
|
|
*/
|
|
atof :: proc(s: string) -> f64 {
|
|
v, _ := parse_f64(s)
|
|
return v
|
|
}
|
|
// Alias to `append_float`
|
|
ftoa :: append_float
|
|
/*
|
|
Appends a float64 value as a string to the given buffer with the specified format and precision
|
|
|
|
**Inputs**
|
|
- buf: The buffer to append the float64 value to
|
|
- f: The float64 value to be appended
|
|
- fmt: The byte specifying the format to use for the conversion
|
|
- prec: The precision to use for the conversion
|
|
- bit_size: The size of the float in bits (32 or 64)
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
append_float_example :: proc() {
|
|
buf: [8]byte
|
|
result := strconv.append_float(buf[:], 3.14159, 'f', 2, 64)
|
|
fmt.println(result, buf)
|
|
}
|
|
|
|
Output:
|
|
|
|
+3.14 [43, 51, 46, 49, 52, 0, 0, 0]
|
|
|
|
**Returns**
|
|
- The resulting string after appending the float
|
|
*/
|
|
append_float :: proc(buf: []byte, f: f64, fmt: byte, prec, bit_size: int) -> string {
|
|
return string(generic_ftoa(buf, f, fmt, prec, bit_size))
|
|
}
|
|
/*
|
|
Appends a quoted string representation of the input string to a given byte slice and returns the result as a string
|
|
|
|
**Inputs**
|
|
- buf: The byte slice to which the quoted string will be appended
|
|
- str: The input string to be quoted
|
|
|
|
!! ISSUE !! NOT EXPECTED -- "\"hello\"" was expected
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
quote_example :: proc() {
|
|
buf: [20]byte
|
|
result := strconv.quote(buf[:], "hello")
|
|
fmt.println(result, buf)
|
|
}
|
|
|
|
Output:
|
|
|
|
"'h''e''l''l''o'" [34, 39, 104, 39, 39, 101, 39, 39, 108, 39, 39, 108, 39, 39, 111, 39, 34, 0, 0, 0]
|
|
|
|
**Returns**
|
|
- The resulting string after appending the quoted string representation
|
|
*/
|
|
quote :: proc(buf: []byte, str: string) -> string {
|
|
write_byte :: proc(buf: []byte, i: ^int, bytes: ..byte) {
|
|
if i^ >= len(buf) {
|
|
return
|
|
}
|
|
n := copy(buf[i^:], bytes[:])
|
|
i^ += n
|
|
}
|
|
|
|
if buf == nil {
|
|
return ""
|
|
}
|
|
|
|
c :: '"'
|
|
i := 0
|
|
s := str
|
|
|
|
write_byte(buf, &i, c)
|
|
for width := 0; len(s) > 0; s = s[width:] {
|
|
r := rune(s[0])
|
|
width = 1
|
|
if r >= utf8.RUNE_SELF {
|
|
r, width = utf8.decode_rune_in_string(s)
|
|
}
|
|
if width == 1 && r == utf8.RUNE_ERROR {
|
|
write_byte(buf, &i, '\\', 'x')
|
|
write_byte(buf, &i, digits[s[0]>>4])
|
|
write_byte(buf, &i, digits[s[0]&0xf])
|
|
}
|
|
if i < len(buf) {
|
|
x := quote_rune(buf[i:], r)
|
|
i += len(x)
|
|
}
|
|
}
|
|
write_byte(buf, &i, c)
|
|
return string(buf[:i])
|
|
}
|
|
/*
|
|
Appends a quoted rune representation of the input rune to a given byte slice and returns the result as a string
|
|
|
|
**Inputs**
|
|
- buf: The byte slice to which the quoted rune will be appended
|
|
- r: The input rune to be quoted
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
quote_rune_example :: proc() {
|
|
buf: [4]byte
|
|
result := strconv.quote_rune(buf[:], 'A')
|
|
fmt.println(result, buf)
|
|
}
|
|
|
|
Output:
|
|
|
|
'A' [39, 65, 39, 0]
|
|
|
|
**Returns**
|
|
- The resulting string after appending the quoted rune representation
|
|
*/
|
|
quote_rune :: proc(buf: []byte, r: rune) -> string {
|
|
write_byte :: proc(buf: []byte, i: ^int, bytes: ..byte) {
|
|
if i^ < len(buf) {
|
|
n := copy(buf[i^:], bytes[:])
|
|
i^ += n
|
|
}
|
|
}
|
|
write_string :: proc(buf: []byte, i: ^int, s: string) {
|
|
if i^ < len(buf) {
|
|
n := copy(buf[i^:], s)
|
|
i^ += n
|
|
}
|
|
}
|
|
write_rune :: proc(buf: []byte, i: ^int, r: rune) {
|
|
if i^ < len(buf) {
|
|
b, w := utf8.encode_rune(r)
|
|
n := copy(buf[i^:], b[:w])
|
|
i^ += n
|
|
}
|
|
}
|
|
|
|
if buf == nil {
|
|
return ""
|
|
}
|
|
|
|
i := 0
|
|
write_byte(buf, &i, '\'')
|
|
|
|
switch r {
|
|
case '\a': write_string(buf, &i, "\\a")
|
|
case '\b': write_string(buf, &i, "\\b")
|
|
case '\e': write_string(buf, &i, "\\e")
|
|
case '\f': write_string(buf, &i, "\\f")
|
|
case '\n': write_string(buf, &i, "\\n")
|
|
case '\r': write_string(buf, &i, "\\r")
|
|
case '\t': write_string(buf, &i, "\\t")
|
|
case '\v': write_string(buf, &i, "\\v")
|
|
case:
|
|
if r < 32 {
|
|
write_string(buf, &i, "\\x")
|
|
b: [2]byte
|
|
s := append_bits(b[:], u64(r), 16, true, 64, digits, nil)
|
|
switch len(s) {
|
|
case 0: write_string(buf, &i, "00")
|
|
case 1: write_rune(buf, &i, '0')
|
|
case 2: write_string(buf, &i, s)
|
|
}
|
|
} else {
|
|
write_rune(buf, &i, r)
|
|
}
|
|
}
|
|
write_byte(buf, &i, '\'')
|
|
|
|
return string(buf[:i])
|
|
}
|
|
/*
|
|
Unquotes a single character from the input string, considering the given quote character
|
|
|
|
**Inputs**
|
|
- str: The input string containing the character to unquote
|
|
- quote: The quote character to consider (e.g., '"')
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
unquote_char_example :: proc() {
|
|
src:="\'The\' raven"
|
|
r, multiple_bytes, tail_string, success := strconv.unquote_char(src,'\'')
|
|
fmt.println("Source:", src)
|
|
fmt.printf("r: <%v>, multiple_bytes:%v, tail_string:<%s>, success:%v\n",r, multiple_bytes, tail_string, success)
|
|
}
|
|
|
|
Output:
|
|
|
|
Source: 'The' raven
|
|
r: <'>, multiple_bytes:false, tail_string:<The' raven>, success:true
|
|
|
|
**Returns**
|
|
- r: The unquoted rune
|
|
- multiple_bytes: A boolean indicating if the rune has multiple bytes
|
|
- tail_string: The remaining portion of the input string after unquoting the character
|
|
- success: A boolean indicating whether the unquoting was successful
|
|
*/
|
|
unquote_char :: proc(str: string, quote: byte) -> (r: rune, multiple_bytes: bool, tail_string: string, success: bool) {
|
|
hex_to_int :: proc(c: byte) -> int {
|
|
switch c {
|
|
case '0'..='9': return int(c-'0')
|
|
case 'a'..='f': return int(c-'a')+10
|
|
case 'A'..='F': return int(c-'A')+10
|
|
}
|
|
return -1
|
|
}
|
|
w: int
|
|
|
|
if str[0] == quote && quote == '"' {
|
|
return
|
|
} else if str[0] >= 0x80 {
|
|
r, w = utf8.decode_rune_in_string(str)
|
|
return r, true, str[w:], true
|
|
} else if str[0] != '\\' {
|
|
return rune(str[0]), false, str[1:], true
|
|
}
|
|
|
|
if len(str) <= 1 {
|
|
return
|
|
}
|
|
s := str
|
|
c := s[1]
|
|
s = s[2:]
|
|
|
|
switch c {
|
|
case:
|
|
return
|
|
|
|
case 'a': r = '\a'
|
|
case 'b': r = '\b'
|
|
case 'f': r = '\f'
|
|
case 'n': r = '\n'
|
|
case 'r': r = '\r'
|
|
case 't': r = '\t'
|
|
case 'v': r = '\v'
|
|
case '\\': r = '\\'
|
|
|
|
case '"': r = '"'
|
|
case '\'': r = '\''
|
|
|
|
case '0'..='7':
|
|
v := int(c-'0')
|
|
if len(s) < 2 {
|
|
return
|
|
}
|
|
for i in 0..<len(s) {
|
|
d := int(s[i]-'0')
|
|
if d < 0 || d > 7 {
|
|
return
|
|
}
|
|
v = (v<<3) | d
|
|
}
|
|
s = s[2:]
|
|
if v > 0xff {
|
|
return
|
|
}
|
|
r = rune(v)
|
|
|
|
case 'x', 'u', 'U':
|
|
count: int
|
|
switch c {
|
|
case 'x': count = 2
|
|
case 'u': count = 4
|
|
case 'U': count = 8
|
|
}
|
|
|
|
if len(s) < count {
|
|
return
|
|
}
|
|
|
|
for i in 0..<count {
|
|
d := hex_to_int(s[i])
|
|
if d < 0 {
|
|
return
|
|
}
|
|
r = (r<<4) | rune(d)
|
|
}
|
|
s = s[count:]
|
|
if c == 'x' {
|
|
break
|
|
}
|
|
if r > utf8.MAX_RUNE {
|
|
return
|
|
}
|
|
multiple_bytes = true
|
|
}
|
|
|
|
success = true
|
|
tail_string = s
|
|
return
|
|
}
|
|
/*
|
|
Unquotes the input string considering any type of quote character and returns the unquoted string
|
|
|
|
**Inputs**
|
|
- lit: The input string to unquote
|
|
- allocator: (default: context.allocator)
|
|
|
|
WARNING: This procedure gives unexpected results if the quotes are not the first and last characters.
|
|
|
|
Example:
|
|
|
|
import "core:fmt"
|
|
import "core:strconv"
|
|
unquote_string_example :: proc() {
|
|
src:="\"The raven Huginn is black.\""
|
|
s, allocated, ok := strconv.unquote_string(src)
|
|
fmt.println(src)
|
|
fmt.printf("Unquoted: <%s>, alloc:%v, ok:%v\n\n", s, allocated, ok)
|
|
|
|
src="\'The raven Huginn\' is black."
|
|
s, allocated, ok = strconv.unquote_string(src)
|
|
fmt.println(src)
|
|
fmt.printf("Unquoted: <%s>, alloc:%v, ok:%v\n\n", s, allocated, ok)
|
|
|
|
src="The raven \'Huginn\' is black."
|
|
s, allocated, ok = strconv.unquote_string(src) // Will produce undesireable results
|
|
fmt.println(src)
|
|
fmt.printf("Unquoted: <%s>, alloc:%v, ok:%v\n", s, allocated, ok)
|
|
}
|
|
|
|
Output:
|
|
|
|
"The raven Huginn is black."
|
|
Unquoted: <The raven Huginn is black.>, alloc:false, ok:true
|
|
|
|
'The raven Huginn' is black.
|
|
Unquoted: <The raven Huginn' is black>, alloc:false, ok:true
|
|
|
|
The raven 'Huginn' is black.
|
|
Unquoted: <he raven 'Huginn' is black>, alloc:false, ok:true
|
|
|
|
**Returns**
|
|
- res: The resulting unquoted string
|
|
- allocated: A boolean indicating if the resulting string was allocated using the provided allocator
|
|
- success: A boolean indicating whether the unquoting was successful
|
|
|
|
NOTE: If unquoting is unsuccessful, the allocated memory for the result will be freed.
|
|
*/
|
|
unquote_string :: proc(lit: string, allocator := context.allocator) -> (res: string, allocated, success: bool) {
|
|
contains_rune :: proc(s: string, r: rune) -> int {
|
|
for c, offset in s {
|
|
if c == r {
|
|
return offset
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
if len(lit) < 2 {
|
|
return
|
|
}
|
|
if lit[0] == '`' {
|
|
return lit[1:len(lit)-1], false, true
|
|
}
|
|
|
|
s := lit
|
|
quote := '"'
|
|
|
|
if s == `""` {
|
|
return "", false, true
|
|
}
|
|
s = s[1:len(s)-1]
|
|
|
|
if contains_rune(s, '\n') >= 0 {
|
|
return s, false, false
|
|
}
|
|
|
|
if contains_rune(s, '\\') < 0 && contains_rune(s, quote) < 0 {
|
|
if quote == '"' {
|
|
return s, false, true
|
|
}
|
|
}
|
|
|
|
context.allocator = allocator
|
|
|
|
buf_len := 3*len(s) / 2
|
|
buf := make([]byte, buf_len)
|
|
offset := 0
|
|
for len(s) > 0 {
|
|
r, multiple_bytes, tail_string, ok := unquote_char(s, byte(quote))
|
|
if !ok {
|
|
delete(buf)
|
|
return s, false, false
|
|
}
|
|
s = tail_string
|
|
if r < 0x80 || !multiple_bytes {
|
|
buf[offset] = byte(r)
|
|
offset += 1
|
|
} else {
|
|
b, w := utf8.encode_rune(r)
|
|
copy(buf[offset:], b[:w])
|
|
offset += w
|
|
}
|
|
}
|
|
|
|
new_string := string(buf[:offset])
|
|
|
|
return new_string, true, true
|
|
}
|