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add new Literal API for pure literal expressions:

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Design compile time api hs_compile_lit() and hs_compile_lit_multi()
to handle pure literal pattern sets. Corresponding option --literal-on
is added for hyperscan testing suites. Extended parameters and part of
flags are not supported for this api.
This commit is contained in:
Hong, Yang A
2019-07-18 00:29:27 +08:00
committed by Chang, Harry
parent 8bfbf07f75
commit 23e5f06594
36 changed files with 745 additions and 116 deletions
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26
tools/hsdump/main.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2018, Intel Corporation
* Copyright (c) 2015-2019, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -106,6 +106,8 @@ bool dump_intermediate = true;
bool force_edit_distance = false;
u32 edit_distance = 0;
int use_literal_api = 0;
} // namespace
// Usage statement.
@@ -139,6 +141,7 @@ void usage(const char *name, const char *error) {
printf(" -8 Force UTF8 mode on all patterns.\n");
printf(" -L Apply HS_FLAG_SOM_LEFTMOST to all patterns.\n");
printf(" --prefilter Apply HS_FLAG_PREFILTER to all patterns.\n");
printf(" --literal-on Use Hyperscan pure literal matching API.\n");
printf("\n");
printf("Example:\n");
printf("$ %s -e pattern.file -s sigfile\n", name);
@@ -163,6 +166,7 @@ void processArgs(int argc, char *argv[], Grey &grey) {
{"utf8", no_argument, nullptr, '8'},
{"prefilter", no_argument, &force_prefilter, 1},
{"som-width", required_argument, nullptr, 'd'},
{"literal-on", no_argument, &use_literal_api, 1},
{nullptr, 0, nullptr, 0}
};
@@ -501,9 +505,23 @@ unsigned int dumpDataMulti(const vector<const char *> &patterns,
hs_database_t *db = nullptr;
hs_compile_error_t *compile_err;
hs_error_t err = hs_compile_multi_int(
patterns.data(), flags.data(), ids.data(), ext.c_array(),
patterns.size(), mode, plat_info.get(), &db, &compile_err, grey);
hs_error_t err;
const size_t count = patterns.size();
if (use_literal_api) {
// Compute length of each pattern.
vector<size_t> lens(count);
for (unsigned int i = 0; i < count; i++) {
lens[i] = strlen(patterns[i]);
}
err = hs_compile_lit_multi_int(patterns.data(), flags.data(),
ids.data(), ext.c_array(), lens.data(),
count, mode, plat_info.get(), &db,
&compile_err, grey);
} else {
err = hs_compile_multi_int(patterns.data(), flags.data(), ids.data(),
ext.c_array(), count, mode, plat_info.get(),
&db, &compile_err, grey);
}
if (err != HS_SUCCESS) {
if (compile_err && compile_err->message) {