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/*
* Copyright (c) 2015, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "nfa_dump_internal.h"
#include "accel.h"
#include "nfa_internal.h"
#include "ue2common.h"
#include <cctype> // for isprint
#include <sstream>
#ifndef DUMP_SUPPORT
#error No dump support!
#endif
namespace ue2 {
void dumpDotPreamble(FILE *dotFile) {
fprintf(dotFile, "digraph NFA {\n");
fprintf(dotFile, "rankdir=LR;\n");
fprintf(dotFile, "size=\"11.5,8\"\n");
fprintf(dotFile, "node [ shape = circle ];\n");
fprintf(dotFile, "START [style=invis];\n");
}
void dumpDotTrailer(FILE *dotFile) {
fprintf(dotFile, "}\n");
}
static
void dumpFlags(const struct NFA *nfa, FILE *f) {
fprintf(f, "Flags : ");
if (nfa->flags & NFA_ACCEPTS_EOD) {
fprintf(f, "ACCEPTS_EOD ");
}
if (nfa->flags & NFA_ZOMBIE) {
fprintf(f, "ZOMBIE ");
}
fprintf(f, "\n");
}
// Render an unsigned integer as a string, returning "inf/unknown" if it's
// zero.
static
std::string value_or_inf(const u64a v) {
std::ostringstream oss;
if (v) {
oss << v;
} else {
oss << "inf/unknown";
}
return oss.str();
}
void dumpTextReverse(const struct NFA *nfa, FILE *f) {
bool twofer = false;
fprintf(f, "Queue : %u\n", nfa->queueIndex);
fprintf(f, "Length : %u bytes\n", nfa->length);
fprintf(f, "Num Positions : %u\n", nfa->nPositions);
fprintf(f, "Scratch State : %u bytes\n", nfa->scratchStateSize);
fprintf(f, "Stream State : %u bytes\n", nfa->streamStateSize);
dumpFlags(nfa, f);
fprintf(f, "Max Width : %s\n", value_or_inf(nfa->maxWidth).c_str());
fprintf(f, "Min Width : %u\n", nfa->minWidth);
fprintf(f, "BiAnchored Width : %s\n",
value_or_inf(nfa->maxBiAnchoredWidth).c_str());
fprintf(f, "Max Offset : %s\n", value_or_inf(nfa->maxOffset).c_str());
fprintf(f, "Reverse Acceleration : ");
switch (nfa->rAccelType) {
case ACCEL_NONE:
fprintf(f, "NONE\n");
return;
case ACCEL_RVERM:
fprintf(f, "R VERM");
break;
case ACCEL_RVERM_NOCASE:
fprintf(f, "R VERM NOCASE");
break;
case ACCEL_RDVERM:
fprintf(f, "R VERM x2");
twofer = true;
break;
case ACCEL_RDVERM_NOCASE:
fprintf(f, "R VERM NOCASE x2");
twofer = true;
break;
case ACCEL_REOD:
fprintf(f, "R EOD");
break;
case ACCEL_REOD_NOCASE:
fprintf(f, "R EOD NOCASE");
break;
case ACCEL_RDEOD:
fprintf(f, "R EOD x2");
twofer = true;
break;
case ACCEL_RDEOD_NOCASE:
fprintf(f, "R EOD x2 NOCASE");
twofer = true;
break;
default:
fprintf(f, "UNKNOWN\n");
return;
}
char c1 = nfa->rAccelData.array[0];
char c2 = nfa->rAccelData.array[1];
if (!twofer) {
fprintf(f, " \\x%02hhx (%c) ", c1, isprint(c1) ? c1 : '?');
} else {
fprintf(f, " \\x%02hhx\\x%02hhx (%c%c) ", c1, c2,
isprint(c1) ? c1 : '?', isprint(c2) ? c2 : '?');
}
fprintf(f, "offset %hhd\n", nfa->rAccelOffset);
}
} // namespace ue2