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os, builtin: reduce leaks without -autofree

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This commit is contained in:
Delyan Angelov
2021-10-29 15:49:30 +03:00
parent f801ef5e17
commit b86c79329b
5 changed files with 103 additions and 20 deletions
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17
vlib/builtin/array.v
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@ -544,18 +544,25 @@ pub fn (mut a []string) free() {
// => '["a", "b", "c"]'.
[manualfree]
pub fn (a []string) str() string {
mut sb := strings.new_builder(a.len * 3)
sb.write_string('[')
mut sb_len := 4 // 2x" + 1x, + 1xspace
if a.len > 0 {
// assume that most strings will be ~large as the first
sb_len += a[0].len
sb_len *= a.len
}
sb_len += 2 // 1x[ + 1x]
mut sb := strings.new_builder(sb_len)
sb.write_b(`[`)
for i in 0 .. a.len {
val := a[i]
sb.write_string("'")
sb.write_b(`'`)
sb.write_string(val)
sb.write_string("'")
sb.write_b(`'`)
if i < a.len - 1 {
sb.write_string(', ')
}
}
sb.write_string(']')
sb.write_b(`]`)
res := sb.str()
unsafe { sb.free() }
return res