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strings: add Builder.drain_builder/1 utility method

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This commit is contained in:
Delyan Angelov 2021-12-05 11:59:18 +02:00
parent 229d2fb667
commit e4850a007c
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2 changed files with 15 additions and 12 deletions
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11
vlib/strings/builder.c.v
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@ -62,6 +62,17 @@ pub fn (mut b Builder) write(data []byte) ?int {
return data.len
}
// drain_builder writes all of the `other` builder content, then re-initialises
// `other`, so that the `other` strings builder is ready to receive new content.
[manualfree]
pub fn (mut b Builder) drain_builder(mut other Builder, other_new_cap int) {
b.write(other) or { panic(err) }
unsafe { other.free() }
other = new_builder(other_new_cap)
}
// byte_at returns a byte, located at a given index `i`.
// NB: it can panic, if there are not enough bytes in the strings builder yet.
[inline]
pub fn (b &Builder) byte_at(n int) byte {
return unsafe { (&[]byte(b))[n] }

16
vlib/v/gen/c/cgen.v
View File

@ -342,18 +342,10 @@ pub fn gen(files []&ast.File, table &ast.Table, pref &pref.Preferences) string {
for file in files {
global_g.file = file
global_g.gen_file()
global_g.inits[file.mod.name].write(global_g.init) or { panic(err) }
unsafe { global_g.init.free() }
global_g.init = strings.new_builder(100)
global_g.cleanups[file.mod.name].write(global_g.cleanup) or { panic(err) }
unsafe { global_g.cleanup.free() }
global_g.cleanup = strings.new_builder(100)
global_g.global_inits[file.mod.name].write(global_g.global_init) or { panic(err) }
unsafe { global_g.global_init.free() }
global_g.global_init = strings.new_builder(100)
global_g.inits[file.mod.name].drain_builder(mut global_g.init, 100)
global_g.cleanups[file.mod.name].drain_builder(mut global_g.cleanup, 100)
global_g.global_inits[file.mod.name].drain_builder(mut global_g.global_init,
100)
}
global_g.timers.start('cgen unification')
}