mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-04-23 17:15:33 +00:00
Code Activity

Add support for reading gzip'd input files

Browse source 
Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-07-26 10:23:58 +01:00
parent d6a289d3e3
commit 933db0410e
6 changed files with 57 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

40
kernel/register.cc
View file

@ -25,6 +25,26 @@
#include <stdio.h>
#include <errno.h>
#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);
}
PRIVATE_NAMESPACE_END
#endif
YOSYS_NAMESPACE_BEGIN
#define MAX_REG_COUNT 1000
@ -436,6 +456,26 @@ void Frontend::extra_args(std::istream *&f, std::string &filename, std::vector<s
delete ff;
else
f = ff;
// Check for gzip magic
unsigned char magic[3];
int n = readsome(*ff, reinterpret_cast<char*>(magic), 3);
if (n == 3 && magic[0] == 0x1f && magic[1] == 0x8b) {
#ifdef YOSYS_ENABLE_ZLIB
log("Found gzip magic in file `%s', decompressing using zlib.\n", filename.c_str());
if (magic[2] != 8)
log_cmd_error("gzip file `%s' uses unsupported compression type %02x\n",
filename.c_str(), unsigned(magic[2]));
delete ff;
std::stringstream *df = new std::stringstream();
decompress_gzip(filename, *df);
f = df;
#else
log_cmd_error("File `%s' is a gzip file, but Yosys is compiled without zlib.\n", filename.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", filename.c_str(), strerror(errno));