67 lines
2.1 KiB
Markdown
67 lines
2.1 KiB
Markdown
## Cppcheck developer and build tools
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### * tools/matchcompiler.py
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The matchcompiler.py is a build script that performs a few code transformations to *.cpp* files under the *lib* directory. These transformations are related to the use of `Token::Match()` function and are intended to improve code performance. The transformed files are saved on the *build* directory. This tool is silently used when building the code with `SRCDIR=build`, that is:
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```shell
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$ cd path/to/cppcheck
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$ make MATCHCOMPILER=yes
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```
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Here is a simple example of the *matchcompiler.py* optimization. Suppose there is a file *example.cpp* under *lib/*:
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```cpp
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// lib/example.cpp
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void f1() {
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Token::Match(tok, "abc");
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}
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void f2() {
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const char *abc = "abc";
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Token::Match(tok, abc);
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}
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```
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If you manually run *matchcompiler.py* from the main directory:
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```shell
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$ cd path/to/cppcheck
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$ python tools/matchcompiler.py
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```
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A file *example.cpp* will be generated on the *build* directory:
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```cpp
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// build/example.cpp
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#include "token.h"
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#include "errorlogger.h"
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#include <string>
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#include <cstring>
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static const std::string matchStr1("abc");
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// pattern: abc
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static bool match1(const Token* tok) {
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if (!tok || !(tok->str()==matchStr1)/* abc */)
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return false;
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return true;
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}
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void f1() {
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match1(tok);
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}
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void f2() {
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const char *abc = "abc";
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Token::Match(tok, abc);
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}
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```
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From this we can see that the usage of `Token::Match()` in `f1()` has been optimized, whereas the one in `f2()` couldn't be optimized (the string wasn't inline on the `Token::Match()` call). **The developer doesn't need to use this tool during development but should be aware of these optimizations**. *Building with this optimization, cppcheck can get a boost of 2x of speed-up.*
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### * tools/dmake.cpp
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Automatically generates the main `Makefile` for Cppcheck (**the main `Makefile` should not be modified manually**). To build and run the `dmake` tool execute:
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```shell
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$ cd path/to/cppcheck
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$ make dmake
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$ ./dmake
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```
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### * tools/reduce.py
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Script that reduces code for a hang/false positive.
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### * tools/times.sh
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Script to generate a `times.log` file that contains timing information of the last 20 revisions.
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