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add version flag #179

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add version flag #179

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c35514b
add version flag
romainmenke Apr 6, 2017
296a911
Merge branch 'master' into feature/version-flag
eustas Apr 21, 2017
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15 changes: 14 additions & 1 deletion guetzli/guetzli.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,9 @@

namespace {

// The current guetzli version
static const char* const kVersion = "1.0.1";

constexpr int kDefaultJPEGQuality = 95;

// An upper estimate of memory usage of Guetzli. The bound is
Expand Down Expand Up @@ -67,7 +70,7 @@ bool ReadPNG(const std::string& data, int* xsize, int* ysize,
std::istringstream memstream(data, std::ios::in | std::ios::binary);
png_set_read_fn(png_ptr, static_cast<void*>(&memstream), [](png_structp png_ptr, png_bytep outBytes, png_size_t byteCountToRead) {
std::istringstream& memstream = *static_cast<std::istringstream*>(png_get_io_ptr(png_ptr));

memstream.read(reinterpret_cast<char*>(outBytes), byteCountToRead);

if (memstream.eof()) png_error(png_ptr, "unexpected end of data");
Expand Down Expand Up @@ -218,6 +221,7 @@ void Usage() {
"guetzli [flags] input_filename output_filename\n"
"\n"
"Flags:\n"
" --version - Print version.\n"
" --verbose - Print a verbose trace of all attempts to standard output.\n"
" --quality Q - Visual quality to aim for, expressed as a JPEG quality value.\n"
" Default value is %d.\n"
Expand All @@ -227,6 +231,12 @@ void Usage() {
exit(1);
}

void Version() {
fprintf(stdout,
"Guetzli %s\n", kVersion);
exit(0);
}

} // namespace

int main(int argc, char** argv) {
Expand All @@ -240,6 +250,9 @@ int main(int argc, char** argv) {
for(;opt_idx < argc;opt_idx++) {
if (strnlen(argv[opt_idx], 2) < 2 || argv[opt_idx][0] != '-' || argv[opt_idx][1] != '-')
break;
if (!strcmp(argv[opt_idx], "--version")) {
Version();
}
if (!strcmp(argv[opt_idx], "--verbose")) {
verbose = 1;
} else if (!strcmp(argv[opt_idx], "--quality")) {
Expand Down