drgn/libdrgn/build-aux/version.sh
Omar Sandoval 75c3679147 Rewrite drgn core in C
The current mixed Python/C implementation works well, but it has a
couple of important limitations:

- It's too slow for some common use cases, like iterating over large
  data structures.
- It can't be reused in utilities written in other languages.

This replaces the internals with a new library written in C, libdrgn. It
includes Python bindings with mostly the same public interface as
before, with some important improvements:

- Types are now represented by a single Type class rather than the messy
  polymorphism in the Python implementation.
- Qualifiers are a bitmask instead of a set of strings.
- Bit fields are not considered a separate type.
- The lvalue/rvalue terminology is replaced with reference/value.
- Structure, union, and array values are better supported.
- Function objects are supported.
- Program distinguishes between lookups of variables, constants, and
  functions.

The C rewrite is about 6x as fast as the original Python when using the
Python bindings, and about 8x when using the C API directly.

Currently, the exposed API in C is fairly conservative. In the future,
the memory reader, type index, and object index APIs will probably be
exposed for more flexibility.
2019-04-02 14:12:07 -07:00

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#!/bin/sh
major="$(sed -rn 's/^#define DRGN_VERSION_MAJOR ([0-9])+$/\1/p' drgn.h)"
minor="$(sed -rn 's/^#define DRGN_VERSION_MINOR ([0-9])+$/\1/p' drgn.h)"
patch="$(sed -rn 's/^#define DRGN_VERSION_PATCH ([0-9])+$/\1/p' drgn.h)"
if [ -z "$major" -o -z "$minor" -o -z "$patch" ]; then
echo "Could not find version number in drgn.h" >&2
exit 1
fi
echo "$major.$minor.$patch"