mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
815 lines
14 KiB
Go
815 lines
14 KiB
Go
module builtin
|
|
|
|
// V strings are not null-terminated.
|
|
struct string {
|
|
str byteptr
|
|
pub:
|
|
len int
|
|
}
|
|
|
|
struct ustring {
|
|
pub:
|
|
s string
|
|
runes []int
|
|
len int
|
|
}
|
|
|
|
// For C strings only
|
|
fn C.strlen(s byteptr) int
|
|
|
|
// Converts a C string to a V string
|
|
fn tos(s byteptr, len int) string {
|
|
// This should never happen.
|
|
if isnil(s) {
|
|
panic('tos(): nil string')
|
|
}
|
|
return string {
|
|
str: s
|
|
len: len
|
|
}
|
|
}
|
|
|
|
fn tos_clone(s byteptr) string {
|
|
if isnil(s) {
|
|
panic('tos: nil string')
|
|
return string{}
|
|
}
|
|
len := strlen(s)
|
|
res := tos(s, len)
|
|
return res.clone()
|
|
}
|
|
|
|
// Same as `tos`, but calculates the length itself. TODO bad name.
|
|
fn tos2(s byteptr) string {
|
|
if isnil(s) {
|
|
panic('tos2: nil string')
|
|
return string{}
|
|
}
|
|
len := C.strlen(s)
|
|
res := tos(s, len)
|
|
return res
|
|
}
|
|
|
|
fn tos_no_len(s byteptr) string {
|
|
return tos2(s)
|
|
}
|
|
|
|
fn (a string) clone() string {
|
|
mut b := string {
|
|
len: a.len
|
|
str: malloc(a.len + 1)
|
|
}
|
|
for i := 0; i < a.len; i++ {
|
|
b[i] = a[i]
|
|
}
|
|
b[a.len] = `\0`
|
|
return b
|
|
}
|
|
|
|
fn (s string) cstr() byteptr {
|
|
clone := s.clone()
|
|
return clone.str
|
|
}
|
|
|
|
pub fn (s string) replace(rep, with string) string {
|
|
if s.len == 0 || rep.len == 0 {
|
|
return ''
|
|
}
|
|
if !s.contains(rep) {
|
|
return s
|
|
}
|
|
// println('"$s" replace "$rep" with "$with" rep.len=$rep.len')
|
|
// TODO PERF Allocating ints is expensive. Should be a stack array
|
|
// Get locations of all reps within this string
|
|
mut idxs := []int{}
|
|
// idxs := []int {
|
|
// 2, 8, 14
|
|
// }
|
|
for i := 0; i < s.len; i++ {
|
|
// Do we have the string we are looking for (rep) starting at i?
|
|
// Go thru all chars in rep and compare.
|
|
mut rep_i := 0
|
|
mut j := i
|
|
for rep_i < rep.len && j < s.len && s[j] == rep[rep_i] {
|
|
rep_i++
|
|
j++
|
|
}
|
|
if rep_i == rep.len {
|
|
idxs << i
|
|
}
|
|
}
|
|
// Dont change the string if there's nothing to replace
|
|
if idxs.len == 0 {
|
|
return s
|
|
}
|
|
// Now we know the number of replacements we need to do and we can calc the len of the new string
|
|
new_len := s.len + idxs.len * (with.len - rep.len)
|
|
mut b := malloc(new_len + 1)// add a newline just in case
|
|
// Fill the new string
|
|
mut idx_pos := 0
|
|
mut cur_idx := idxs[idx_pos]
|
|
mut b_i = 0
|
|
for i := 0; i < s.len; i++ {
|
|
// Reached the location of rep, replace it with "with"
|
|
if i == cur_idx {
|
|
for j := 0; j < with.len; j++ {
|
|
b[b_i] = with[j]
|
|
b_i++
|
|
}
|
|
// Skip the length of rep, since we just replaced it with "with"
|
|
i += rep.len - 1
|
|
// Go to the next index
|
|
idx_pos++
|
|
if idx_pos < idxs.len {
|
|
cur_idx = idxs[idx_pos]
|
|
}
|
|
}
|
|
// Rep doesnt start here, just copy
|
|
else {
|
|
b[b_i] = s[i]
|
|
b_i++
|
|
}
|
|
}
|
|
b[new_len] = `\0`
|
|
return tos(b, new_len)
|
|
}
|
|
|
|
// TODO `.int()` ?
|
|
pub fn (s string) to_i() int {
|
|
return C.atoi(s.str)
|
|
}
|
|
|
|
// TODO `.f32()`
|
|
fn (s string) to_float() float {
|
|
return C.atof(s.str)
|
|
}
|
|
|
|
// ==
|
|
fn (s string) eq(a string) bool {
|
|
if isnil(s.str) {
|
|
panic('string.eq(): nil string')
|
|
}
|
|
if s.len != a.len {
|
|
return false
|
|
}
|
|
for i := 0; i < s.len; i++ {
|
|
if s[i] != a[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// !=
|
|
fn (s string) ne(a string) bool {
|
|
return !s.eq(a)
|
|
}
|
|
|
|
// s >= a
|
|
fn (s string) ge(a string) bool {
|
|
mut j := 0
|
|
for i := 0; i < s.len; i++ {
|
|
if i >= a.len {
|
|
return true
|
|
}
|
|
if int(s[i]) < int(a[j]) {
|
|
return false
|
|
}
|
|
else if int(s[i]) > int(a[j]) {
|
|
return true
|
|
}
|
|
j++
|
|
}
|
|
return true
|
|
}
|
|
|
|
// s <= a
|
|
fn (s string) le(a string) bool {
|
|
return !s.ge(a) || s == a
|
|
}
|
|
|
|
// s < a
|
|
fn (s string) lt(a string) bool {
|
|
return s.le(a) && s != a
|
|
}
|
|
|
|
// s > a
|
|
fn (s string) gt(a string) bool {
|
|
return s.ge(a) && s != a
|
|
}
|
|
|
|
// TODO `fn (s string) + (a string)` ? To be consistent with operator overloading syntax.
|
|
fn (s string) add(a string) string {
|
|
new_len := a.len + s.len
|
|
mut res := string {
|
|
len: new_len
|
|
str: malloc(new_len + 1)
|
|
}
|
|
for j := 0; j < s.len; j++ {
|
|
res[j] = s[j]
|
|
}
|
|
for j := 0; j < a.len; j++ {
|
|
res[s.len + j] = a[j]
|
|
}
|
|
res[new_len] = `\0`// V strings are not null terminated, but just in case
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) split(delim string) []string {
|
|
// println('string split delim="$delim" s="$s"')
|
|
mut res := []string
|
|
if delim.len == 0 {
|
|
res << s
|
|
return res
|
|
}
|
|
if delim.len == 1 {
|
|
return s.split_single(delim[0])
|
|
// println2('split 1 only')
|
|
// os.exit()
|
|
}
|
|
mut i := 0
|
|
mut start := 0// - 1
|
|
for i < s.len {
|
|
// printiln(i)
|
|
mut a := s[i] == delim[0]
|
|
mut j := 1
|
|
for j < delim.len && a {
|
|
a = a && s[i + j] == delim[j]
|
|
j++
|
|
}
|
|
last := i == s.len - 1
|
|
if a || last {
|
|
if last {
|
|
i++
|
|
}
|
|
mut val := s.substr(start, i)
|
|
// println('got it "$val" start=$start i=$i delim="$delim"')
|
|
if val.len > 0 {
|
|
// todo perf
|
|
// val now is '___VAL'. remove '___' from the start
|
|
if val.starts_with(delim) {
|
|
// println('!!')
|
|
val = val.right(delim.len)
|
|
}
|
|
res << val.trim_space()
|
|
}
|
|
start = i
|
|
}
|
|
i++
|
|
}
|
|
return res
|
|
}
|
|
|
|
fn (s string) split_single(delim byte) []string {
|
|
mut res := []string
|
|
if int(delim) == 0 {
|
|
res << s
|
|
return res
|
|
}
|
|
mut i := 0
|
|
mut start := 0
|
|
for i < s.len {
|
|
a := s[i] == delim
|
|
b := i == s.len - 1
|
|
if a || b {
|
|
if i == s.len - 1 {
|
|
i++
|
|
}
|
|
val := s.substr(start, i)
|
|
if val.len > 0 {
|
|
res << val.trim_space()
|
|
}
|
|
start = i + 1
|
|
}
|
|
i++
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) split_into_lines() []string {
|
|
mut res := []string
|
|
if s.len == 0 {
|
|
return res
|
|
}
|
|
mut start := 0
|
|
for i := 0; i < s.len; i++ {
|
|
last := i == s.len - 1
|
|
if int(s[i]) == 10 || last {
|
|
if last {
|
|
i++
|
|
}
|
|
line := s.substr(start, i)
|
|
res << line
|
|
start = i + 1
|
|
}
|
|
}
|
|
return res
|
|
}
|
|
|
|
// 'hello'.left(2) => 'he'
|
|
pub fn (s string) left(n int) string {
|
|
if n >= s.len {
|
|
return s
|
|
}
|
|
return s.substr(0, n)
|
|
}
|
|
|
|
pub fn (s string) right(n int) string {
|
|
if n >= s.len {
|
|
return ''
|
|
}
|
|
return s.substr(n, s.len)
|
|
}
|
|
|
|
// Because the string is immutable, it is safe for multiple strings to share
|
|
// the same storage, so slicing s results in a new 2-word structure with a
|
|
// potentially different pointer and length that still refers to the same byte
|
|
// sequence. This means that slicing can be done without allocation or copying,
|
|
// making string slices as efficient as passing around explicit indexes.
|
|
// substr without allocations. Reuses memory and works great. BUT. This substring does not have
|
|
// a \0 at the end, and it's not possible to add it. So if we have s = 'privet'
|
|
// and substr := s.substr_fast(1, 4) ('riv')
|
|
// puts(substr.str) will print 'rivet'
|
|
// Avoid using C functions with these substrs!
|
|
pub fn (s string) substr(start, end int) string {
|
|
/*
|
|
if start > end || start >= s.len || end > s.len || start < 0 || end < 0 {
|
|
panic('substr($start, $end) out of bounds (len=$s.len)')
|
|
return ''
|
|
}
|
|
*/
|
|
if start >= s.len {
|
|
return ''
|
|
}
|
|
len := end - start
|
|
res := string {
|
|
str: s.str + start
|
|
len: len
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) index(p string) int {
|
|
if p.len > s.len {
|
|
return -1
|
|
}
|
|
mut i := 0
|
|
for i < s.len {
|
|
mut j := 0
|
|
mut ii := i
|
|
for j < p.len && s[ii] == p[j] {
|
|
j++
|
|
ii++
|
|
}
|
|
if j == p.len {
|
|
return i
|
|
}
|
|
i++
|
|
}
|
|
return -1
|
|
}
|
|
|
|
pub fn (s string) last_index(p string) int {
|
|
if p.len > s.len {
|
|
return -1
|
|
}
|
|
mut i := s.len - p.len
|
|
for i >= 0 {
|
|
mut j := 0
|
|
for j < p.len && s[i + j] == p[j] {
|
|
j++
|
|
}
|
|
if j == p.len {
|
|
return i
|
|
}
|
|
i--
|
|
}
|
|
return -1
|
|
}
|
|
|
|
pub fn (s string) index_after(p string, start int) int {
|
|
if p.len > s.len {
|
|
return -1
|
|
}
|
|
mut strt := start
|
|
if start < 0 {
|
|
strt = 0
|
|
}
|
|
if start >= s.len {
|
|
return -1
|
|
}
|
|
mut i := strt
|
|
for i < s.len {
|
|
mut j := 0
|
|
mut ii := i
|
|
for j < p.len && s[ii] == p[j] {
|
|
j++
|
|
ii++
|
|
}
|
|
if j == p.len {
|
|
return i
|
|
}
|
|
i++
|
|
}
|
|
return -1
|
|
}
|
|
|
|
pub fn (s string) contains(p string) bool {
|
|
res := s.index(p) > 0 - 1
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) starts_with(p string) bool {
|
|
res := s.index(p) == 0
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) ends_with(p string) bool {
|
|
if p.len > s.len {
|
|
return false
|
|
}
|
|
res := s.last_index(p) == s.len - p.len
|
|
return res
|
|
}
|
|
|
|
// TODO only works with ASCII
|
|
pub fn (s string) to_lower() string {
|
|
mut b := malloc(s.len)// TODO + 1 ??
|
|
for i := 0; i < s.len; i++ {
|
|
b[i] = C.tolower(s.str[i])
|
|
}
|
|
return tos(b, s.len)
|
|
}
|
|
|
|
pub fn (s string) to_upper() string {
|
|
mut b := malloc(s.len)// TODO + 1 ??
|
|
for i := 0; i < s.len; i++ {
|
|
b[i] = C.toupper(s.str[i])
|
|
}
|
|
return tos(b, s.len)
|
|
}
|
|
|
|
// 'hey [man] how you doin'
|
|
// find_between('[', ']') == 'man'
|
|
fn (s string) find_between(start, end string) string {
|
|
start_pos := s.index(start)
|
|
if start_pos == -1 {
|
|
return ''
|
|
}
|
|
// First get everything to the right of 'start'
|
|
val := s.right(start_pos + start.len)
|
|
end_pos := val.index(end)
|
|
if end_pos == -1 {
|
|
return val
|
|
}
|
|
return val.left(end_pos)
|
|
}
|
|
|
|
// TODO generic
|
|
fn (ar[]string) contains(val string) bool {
|
|
for s in ar {
|
|
if s == val {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// TODO generic
|
|
fn (ar[]int) contains(val int) bool {
|
|
for i, s in ar {
|
|
if s == val {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
fn (a[]string) to_c() voidptr {
|
|
# char ** res = malloc(sizeof(char*) * a.len);
|
|
for i := 0; i < a.len; i++ {
|
|
val := a[i]
|
|
# res[i] = val.str;
|
|
}
|
|
# return res;
|
|
return 0
|
|
}
|
|
|
|
fn is_space(c byte) bool {
|
|
return C.isspace(c)
|
|
}
|
|
|
|
fn (c byte) is_space() bool {
|
|
return is_space(c)
|
|
}
|
|
|
|
pub fn (s string) trim_space() string {
|
|
if s == '' {
|
|
return ''
|
|
}
|
|
// println('TRIM SPACE "$s"')
|
|
mut i := 0
|
|
for i < s.len && is_space(s[i]) {
|
|
i++
|
|
}
|
|
mut res := s.right(i)
|
|
mut end := res.len - 1
|
|
for end >= 0 && is_space(res[end]) {
|
|
// C.printf('end=%d c=%d %c\n', end, res.str[end])
|
|
end--
|
|
}
|
|
res = res.left(end + 1)
|
|
// println('after SPACE "$res"')
|
|
return res
|
|
}
|
|
|
|
pub fn (s string) trim(c byte) string {
|
|
if s == '' {
|
|
return ''
|
|
}
|
|
mut i := 0
|
|
for i < s.len && c == s[i] {
|
|
i++
|
|
}
|
|
mut res := s.right(i)
|
|
mut end := res.len - 1
|
|
for end >= 0 && c == res[end] {
|
|
end--
|
|
}
|
|
res = res.left(end + 1)
|
|
return res
|
|
}
|
|
|
|
fn (s string) trim_left(cutset string) string {
|
|
mut start := s.index(cutset)
|
|
if start != 0 {
|
|
return s
|
|
}
|
|
for start < s.len - 1 && s[start] == cutset[0] {
|
|
start++
|
|
}
|
|
return s.right(start)
|
|
}
|
|
|
|
fn (s string) trim_right(cutset string) string {
|
|
return s
|
|
pos := s.last_index(cutset)
|
|
if pos == -1 {
|
|
return s
|
|
}
|
|
return s.left(pos)
|
|
}
|
|
|
|
// fn print_cur_thread() {
|
|
// //C.printf("tid = %08x \n", pthread_self());
|
|
// }
|
|
fn compare_strings(a, b *string) int {
|
|
if a.le(b) {
|
|
return -1
|
|
}
|
|
if a.ge(b) {
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
|
|
fn compare_strings_by_len(a, b *string) int {
|
|
if a.len < b.len {
|
|
return -1
|
|
}
|
|
if a.len > b.len {
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
|
|
fn compare_lower_strings(a, b *string) int {
|
|
aa := a.to_lower()
|
|
bb := a.to_lower()
|
|
return compare_strings(aa, bb)
|
|
}
|
|
|
|
pub fn (s mut []string) sort() {
|
|
s.sort_with_compare(compare_strings)
|
|
}
|
|
|
|
fn (s mut []string) sort_ignore_case() {
|
|
s.sort_with_compare(compare_lower_strings)
|
|
}
|
|
|
|
fn (s mut []string) sort_by_len() {
|
|
s.sort_with_compare(compare_strings_by_len)
|
|
}
|
|
|
|
fn (s string) ustring() ustring {
|
|
mut res := ustring {
|
|
s: s
|
|
// runes will have at least s.len elements, save reallocations
|
|
// TODO use VLA for small strings?
|
|
runes: new_array(0, s.len, sizeof(int))
|
|
}
|
|
for i := 0; i < s.len; i++ {
|
|
char_len := 0
|
|
# char_len =UTF8_CHAR_LEN(s.str[i]);
|
|
// println('cl=$char_len')
|
|
res.runes << i
|
|
i += char_len - 1
|
|
res.len++
|
|
}
|
|
return res
|
|
}
|
|
|
|
// A hack that allows to create ustring without allocations.
|
|
// It's called from functions like draw_text() where we know that the string is going to be freed
|
|
// right away. Uses global buffer for storing runes []int array.
|
|
# array_int g_ustring_runes;
|
|
fn (s string) ustring_tmp() ustring {
|
|
mut res := ustring {
|
|
s: s
|
|
runes: 0
|
|
}
|
|
# res.runes = g_ustring_runes ;
|
|
# res.runes.len = s.len ;
|
|
mut j := 0
|
|
for i := 0; i < s.len; i++ {
|
|
char_len := 0
|
|
# char_len =UTF8_CHAR_LEN(s.str[i]);
|
|
res.runes[j] = i
|
|
j++
|
|
i += char_len - 1
|
|
res.len++
|
|
}
|
|
return res
|
|
}
|
|
|
|
fn (u ustring) substr(start, end int) string {
|
|
// println('substr($start, $end)')
|
|
// println('runes=')
|
|
// println(u.runes)
|
|
start = u.runes[start]
|
|
// handle last char
|
|
if end >= u.runes.len {
|
|
end = u.s.len
|
|
}
|
|
else {
|
|
end = u.runes[end]
|
|
}
|
|
// println('fast $start, $end')
|
|
return u.s.substr(start, end)
|
|
}
|
|
|
|
fn (u ustring) left(pos int) string {
|
|
return u.substr(0, pos)
|
|
}
|
|
|
|
fn (u ustring) right(pos int) string {
|
|
return u.substr(pos, u.len)
|
|
}
|
|
|
|
fn (s string) at(idx int) byte {
|
|
if idx < 0 || idx >= s.len {
|
|
panic('string index out of range: $idx / $s.len')
|
|
}
|
|
return s.str[idx]
|
|
}
|
|
|
|
fn (u ustring) at(idx int) string {
|
|
return u.substr(idx, idx + 1)
|
|
}
|
|
|
|
fn (u ustring) free() {
|
|
u.runes.free()
|
|
}
|
|
|
|
fn abs(a int) int {
|
|
if a >= 0 {
|
|
return a
|
|
}
|
|
return -a
|
|
}
|
|
|
|
fn (c byte) is_digit() bool {
|
|
return c >= `0` && c <= `9`
|
|
}
|
|
|
|
fn (c byte) is_letter() bool {
|
|
return (c >= `a` && c <= `z`) || (c >= `A` && c <= `Z`)
|
|
}
|
|
|
|
pub fn (s string) free() {
|
|
C.free(s.str)
|
|
}
|
|
|
|
fn (arr[]string) free() {
|
|
for s in arr {
|
|
s.free()
|
|
}
|
|
C.free(arr.data)
|
|
}
|
|
|
|
// all_before('23:34:45.234', '.') == '23:34:45'
|
|
fn (s string) all_before(dot string) string {
|
|
pos := s.index(dot)
|
|
if pos == -1 {
|
|
return s
|
|
}
|
|
return s.left(pos)
|
|
}
|
|
|
|
fn (s string) all_before_last(dot string) string {
|
|
pos := s.last_index(dot)
|
|
if pos == -1 {
|
|
return s
|
|
}
|
|
return s.left(pos)
|
|
}
|
|
|
|
fn (s string) all_after(dot string) string {
|
|
pos := s.last_index(dot)
|
|
if pos == -1 {
|
|
return s
|
|
}
|
|
return s.right(pos + dot.len)
|
|
}
|
|
|
|
// fn (s []string) substr(a, b int) string {
|
|
// return join_strings(s.slice_fast(a, b))
|
|
// }
|
|
pub fn (a[]string) join(del string) string {
|
|
if a.len == 0 {
|
|
return ''
|
|
}
|
|
mut len := 0
|
|
for i, val in a {
|
|
len += val.len + del.len
|
|
}
|
|
len -= del.len
|
|
// Allocate enough memory
|
|
mut res := ''
|
|
res.len = len
|
|
res.str = malloc(res.len + 1)
|
|
mut idx := 0
|
|
// Go thru every string and copy its every char one by one
|
|
for i, val in a {
|
|
for j := 0; j < val.len; j++ {
|
|
c := val[j]
|
|
res.str[idx] = val.str[j]
|
|
idx++
|
|
}
|
|
// Add del if it's not last
|
|
if i != a.len - 1 {
|
|
for k := 0; k < del.len; k++ {
|
|
res.str[idx] = del.str[k]
|
|
idx++
|
|
}
|
|
}
|
|
}
|
|
res.str[res.len] = `\0`
|
|
return res
|
|
}
|
|
|
|
fn (s[]string) join_lines() string {
|
|
return s.join('\n')
|
|
}
|
|
|
|
// 'hello'.limit(2) => 'he'
|
|
// 'hi'.limit(10) => 'hi'
|
|
fn (s string) limit(max int) string {
|
|
u := s.ustring()
|
|
if u.len <= max {
|
|
return s
|
|
}
|
|
return u.substr(0, max)
|
|
}
|
|
|
|
// TODO is_white_space()
|
|
fn (c byte) is_white() bool {
|
|
i := int(c)
|
|
return i == 10 || i == 32 || i == 9 || i == 13 || c == `\r`
|
|
}
|
|
|
|
// TODO move this to strings.repeat()
|
|
fn repeat_char(c byte, n int) string {
|
|
if n <= 0 {
|
|
return ''
|
|
}
|
|
mut arr := malloc(n + 1)
|
|
for i := 0; i < n; i++ {
|
|
arr[i] = c
|
|
}
|
|
arr[n] = `\0`
|
|
return tos(arr, n)
|
|
}
|
|
|
|
pub fn (s string) hash() int {
|
|
mut hash := int(0)
|
|
for i := 0; i < s.len; i++ {
|
|
// if key == 'Content-Type' {
|
|
// println('$i) $hash')
|
|
// }
|
|
hash = hash * int(31) + int(s.str[i])
|
|
}
|
|
return hash
|
|
}
|
|
|