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Allow for gzip magic in stat

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This commit is contained in:
Akash Levy 2024-05-05 04:21:47 -07:00
parent 2a8575abb2
commit 261bc561fa
1 changed files with 101 additions and 6 deletions
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107
passes/cmds/stat.cc
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@ -25,6 +25,65 @@
#include "kernel/cost.h"
#include "libs/json11/json11.hpp"
#ifdef YOSYS_ENABLE_ZLIB
#include <zlib.h>
PRIVATE_NAMESPACE_BEGIN
#define GZ_BUFFER_SIZE 8192
void decompress_gzip(const std::string &filename, std::stringstream &out)
{
char buffer[GZ_BUFFER_SIZE];
int bytes_read;
gzFile gzf = gzopen(filename.c_str(), "rb");
while(!gzeof(gzf)) {
bytes_read = gzread(gzf, reinterpret_cast<void *>(buffer), GZ_BUFFER_SIZE);
out.write(buffer, bytes_read);
}
gzclose(gzf);
}
/*
An output stream that uses a stringbuf to buffer data internally,
using zlib to write gzip-compressed data every time the stream is flushed.
*/
class gzip_ostream : public std::ostream {
public:
gzip_ostream() : std::ostream(nullptr)
{
rdbuf(&outbuf);
}
bool open(const std::string &filename)
{
return outbuf.open(filename);
}
private:
class gzip_streambuf : public std::stringbuf {
public:
gzip_streambuf() { };
bool open(const std::string &filename)
{
gzf = gzopen(filename.c_str(), "wb");
return gzf != nullptr;
}
virtual int sync() override
{
gzwrite(gzf, reinterpret_cast<const void *>(str().c_str()), unsigned(str().size()));
str("");
return 0;
}
virtual ~gzip_streambuf()
{
sync();
gzclose(gzf);
}
private:
gzFile gzf = nullptr;
} outbuf;
};
PRIVATE_NAMESPACE_END
#endif
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
@ -350,13 +409,49 @@ statdata_t hierarchy_worker(std::map<RTLIL::IdString, statdata_t> &mod_stat, RTL
void read_liberty_cellarea(dict<IdString, cell_area_t> &cell_area, string liberty_file)
{
std::ifstream f;
f.open(liberty_file.c_str());
std::istream *f;
std::ifstream *ff = new std::ifstream;
ff->open(liberty_file.c_str(), (liberty_file.substr(liberty_file.size() - 3) == ".gz") ? std::ifstream::binary : std::ifstream::in);
yosys_input_files.insert(liberty_file);
if (f.fail())
log_cmd_error("Can't open liberty file `%s': %s\n", liberty_file.c_str(), strerror(errno));
LibertyParser libparser(f);
f.close();
if (ff->fail()) {
delete ff;
ff = nullptr;
}
f = ff;
if (f != NULL) {
// Check for gzip magic
unsigned char magic[3];
int n = 0;
while (n < 3)
{
int c = ff->get();
if (c != EOF) {
magic[n] = (unsigned char) c;
}
n++;
}
if (n == 3 && magic[0] == 0x1f && magic[1] == 0x8b) {
#ifdef YOSYS_ENABLE_ZLIB
// log("Found gzip magic in file `%s', decompressing using zlib.\n", liberty_file.c_str());
if (magic[2] != 8)
log_cmd_error("gzip file `%s' uses unsupported compression type %02x\n",
liberty_file.c_str(), unsigned(magic[2]));
delete ff;
std::stringstream *df = new std::stringstream();
decompress_gzip(liberty_file, *df);
f = df;
#else
log_cmd_error("File `%s' is a gzip file, but Yosys is compiled without zlib.\n", liberty_file.c_str());
#endif
} else {
ff->clear();
ff->seekg(0, std::ios::beg);
}
}
if (f == NULL)
log_cmd_error("Can't open input file `%s' for reading: %s\n", liberty_file.c_str(), strerror(errno));
LibertyParser libparser(*f);
for (auto cell : libparser.ast->children)
{