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/*
** Common functionality for tests.
**/
#ifndef UPB_TEST_UTIL_H_
#define UPB_TEST_UTIL_H_
#include <stdio.h>
#include <math.h>
#include "tests/upb_test.h"
#include "upb/sink.h"
#include "upb/port_def.inc"
#ifdef __cplusplus
upb_bufhandle global_handle;
/* A convenience class for parser tests. Provides some useful features:
*
* - can support multiple calls to parse, to test the parser's handling
* of buffer seams.
*
* - can output verbose output about each parse call when requested, for
* ease of debugging.
*
* - can pass NULL for skipped regions of the input if requested.
*
* - allocates and passes a separate buffer for each parsed region, to
* ensure that the parser is not erroneously overreading its buffer.
*/
class VerboseParserEnvironment {
public:
/* Pass verbose=true to print detailed diagnostics to stderr. */
VerboseParserEnvironment(bool verbose) : verbose_(verbose) {}
void Reset(const char *buf, size_t len, bool may_skip, bool expect_error) {
buf_ = buf;
len_ = len;
ofs_ = 0;
expect_error_ = expect_error;
end_ok_set_ = false;
skip_until_ = may_skip ? 0 : -1;
skipped_with_null_ = false;
}
/* The user should call a series of:
*
* Reset(buf, len, may_skip);
* Start()
* ParseBuffer(X);
* ParseBuffer(Y);
* // Repeat ParseBuffer as desired, but last call should pass -1.
* ParseBuffer(-1);
* End();
*/
bool Start() {
if (verbose_) {
fprintf(stderr, "Calling start()\n");
}
return sink_.Start(len_, &subc_);
}
bool End() {
if (verbose_) {
fprintf(stderr, "Calling end()\n");
}
end_ok_ = sink_.End();
end_ok_set_ = true;
return end_ok_;
}
bool CheckConsistency() {
/* If we called end (which we should only do when previous bytes are fully
* accepted), then end() should return true iff there were no errors. */
if (end_ok_set_ && end_ok_ != status_.ok()) {
fprintf(stderr, "End() status and saw_error didn't match.\n");
return false;
}
if (expect_error_ && status_.ok()) {
fprintf(stderr, "Expected error but saw none.\n");
return false;
}
if (!status_.ok()) {
if (expect_error_ && verbose_) {
fprintf(stderr, "Encountered error, as expected: %s",
status_.error_message());
} else if (!expect_error_) {
fprintf(stderr, "Encountered unexpected error: %s",
status_.error_message());
return false;
}
}
return true;
}
bool ParseBuffer(int bytes) {
if (bytes < 0) {
bytes = len_ - ofs_;
}
ASSERT((size_t)bytes <= (len_ - ofs_));
/* Copy buffer into a separate, temporary buffer.
* This is necessary to verify that the parser is not erroneously
* reading outside the specified bounds. */
char *buf2 = NULL;
if ((int)(ofs_ + bytes) <= skip_until_) {
skipped_with_null_ = true;
} else {
buf2 = (char*)malloc(bytes);
UPB_ASSERT(buf2);
memcpy(buf2, buf_ + ofs_, bytes);
}
if (buf2 == NULL && bytes == 0) {
/* Decoders dont' support buf=NULL, bytes=0. */
return true;
}
if (verbose_) {
fprintf(stderr, "Calling parse(%u) for bytes %u-%u of the input\n",
(unsigned)bytes, (unsigned)ofs_, (unsigned)(ofs_ + bytes));
}
int parsed = sink_.PutBuffer(subc_, buf2, bytes, &global_handle);
free(buf2);
if (verbose_) {
if (parsed == bytes) {
fprintf(stderr,
"parse(%u) = %u, complete byte count indicates success\n",
(unsigned)bytes, (unsigned)bytes);
} else if (parsed > bytes) {
fprintf(stderr,
"parse(%u) = %u, long byte count indicates success and skip "
"of the next %u bytes\n",
(unsigned)bytes, (unsigned)parsed, (unsigned)(parsed - bytes));
} else {
fprintf(stderr,
"parse(%u) = %u, short byte count indicates failure; "
"last %u bytes were not consumed\n",
(unsigned)bytes, (unsigned)parsed, (unsigned)(bytes - parsed));
}
}
if (!status_.ok()) {
return false;
}
if (parsed > bytes && skip_until_ >= 0) {
skip_until_ = ofs_ + parsed;
}
ofs_ += UPB_MIN(parsed, bytes);
return true;
}
void ResetBytesSink(upb::BytesSink sink) {
sink_ = sink;
}
size_t ofs() { return ofs_; }
bool SkippedWithNull() { return skipped_with_null_; }
upb::Arena* arena() { return &arena_; }
upb::Status* status() { return &status_; }
private:
upb::Arena arena_;
upb::Status status_;
upb::BytesSink sink_;
const char* buf_;
size_t len_;
bool verbose_;
size_t ofs_;
void *subc_;
bool expect_error_;
bool end_ok_;
bool end_ok_set_;
/* When our parse call returns a value greater than the number of bytes
* we passed in, the decoder is indicating to us that the next N bytes
* in the stream are not needed and can be skipped. The user is allowed
* to pass a NULL buffer for those N bytes.
*
* skip_until_ is initially set to 0 if we should do this NULL-buffer
* skipping or -1 if we should not. If we are open to doing NULL-buffer
* skipping and we get an opportunity to do it, we set skip_until to the
* stream offset where we can skip until. The user can then test whether
* this happened by testing SkippedWithNull(). */
int skip_until_;
bool skipped_with_null_;
};
#endif /* __cplusplus */
UPB_INLINE char *upb_readfile(const char *filename, size_t *len) {
long size;
char *buf;
FILE *f = fopen(filename, "rb");
if(!f) return NULL;
if(fseek(f, 0, SEEK_END) != 0) goto error;
size = ftell(f);
if(size < 0) goto error;
if(fseek(f, 0, SEEK_SET) != 0) goto error;
buf = (char*)malloc(size + 1);
if(size && fread(buf, size, 1, f) != 1) goto error;
fclose(f);
if (len) *len = size;
buf[size] = '\0';
return buf;
error:
fclose(f);
return NULL;
}
#include "upb/port_undef.inc"
#endif /* UPB_TEST_UTIL_H_ */
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