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option to disable bounds checking; examples/path_tracing.v: optimizations

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This commit is contained in:
Delyan Angelov
2020-02-16 17:13:45 +02:00
committed by GitHub
parent 277c55fe5b
commit 195f3f465b
9 changed files with 370 additions and 315 deletions
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24
vlib/builtin/string.v
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@ -518,8 +518,10 @@ fn (s string) substr2(start, _end int, end_max bool) string {
}
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)')
$if !no_bounds_checking? {
if start > end || start > s.len || end > s.len || start < 0 || end < 0 {
panic('substr($start, $end) out of bounds (len=$s.len)')
}
}
len := end - start
mut res := string{
@ -1043,8 +1045,10 @@ pub fn (u ustring) count(substr ustring) int {
}
pub fn (u ustring) substr(_start, _end int) string {
if _start > _end || _start > u.len || _end > u.len || _start < 0 || _end < 0 {
panic('substr($_start, $_end) out of bounds (len=$u.len)')
$if !no_bounds_checking? {
if _start > _end || _start > u.len || _end > u.len || _start < 0 || _end < 0 {
panic('substr($_start, $_end) out of bounds (len=$u.len)')
}
}
end := if _end >= u.len { u.s.len } else { u.runes[_end] }
return u.s.substr(u.runes[_start], end)
@ -1065,15 +1069,19 @@ pub fn (u ustring) right(pos int) string {
}
fn (s string) at(idx int) byte {
if idx < 0 || idx >= s.len {
panic('string index out of range: $idx / $s.len')
$if !no_bounds_checking? {
if idx < 0 || idx >= s.len {
panic('string index out of range: $idx / $s.len')
}
}
return s.str[idx]
}
pub fn (u ustring) at(idx int) string {
if idx < 0 || idx >= u.len {
panic('string index out of range: $idx / $u.runes.len')
$if !no_bounds_checking? {
if idx < 0 || idx >= u.len {
panic('string index out of range: $idx / $u.runes.len')
}
}
return u.substr(idx, idx + 1)
}