diff options
Diffstat (limited to 'gcc/rust/backend/rust-mangle.cc')
| -rw-r--r-- | gcc/rust/backend/rust-mangle.cc | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/gcc/rust/backend/rust-mangle.cc b/gcc/rust/backend/rust-mangle.cc index 0e6643c..258e3b0 100644 --- a/gcc/rust/backend/rust-mangle.cc +++ b/gcc/rust/backend/rust-mangle.cc @@ -1,5 +1,6 @@ #include "rust-mangle.h" #include "fnv-hash.h" +#include <algorithm> // FIXME: Rename those to legacy_* static const std::string kMangledSymbolPrefix = "_ZN"; @@ -154,6 +155,44 @@ v0_simple_type_prefix (const TyTy::BaseType *ty) gcc_unreachable (); } +// FIXME: Is this present somewhere in libbiberty already? +static std::string +v0_base62_integer(uint64_t x) +{ + const static std::string base_64 + = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@$"; + std::string buffer(128, '\0'); + size_t idx = 0; + size_t base = 62; + + do + { + buffer[idx] = base_64[(x % base)]; + idx++; + x /= base; + } while (x != 0); + + std::reverse(buffer.begin(), buffer.begin() + idx); + return buffer.substr(0, idx); +} + +static std::string +v0_add_integer_62 (std::string mangled, std::string tag, uint64_t x) +{ + // /// Push a `_`-terminated base 62 integer, using the format + // /// specified in the RFC as `<base-62-number>`, that is: + // /// * `x = 0` is encoded as just the `"_"` terminator + // /// * `x > 0` is encoded as `x - 1` in base 62, followed by `"_"`, + // /// e.g. `1` becomes `"0_"`, `62` becomes `"Z_"`, etc. + // fn push_integer_62(&mut self, x: u64) { + // if let Some(x) = x.checked_sub(1) { + // base_n::push_str(x as u128, 62, &mut self.out); + // } + // self.push("_"); + // } +} + + static std::string v0_type_prefix (const TyTy::BaseType *ty) { @@ -194,7 +233,11 @@ static std::string v0_mangle_item (const TyTy::BaseType *ty, const Resolver::CanonicalPath &path, const std::string &crate_name) { + auto def_id = ty->get_ref(); auto ty_prefix = v0_type_prefix (ty); + auto prefix = "_R"; + + gcc_unreachable (); } |