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Copy pathstringparsingcheck.cpp
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408 lines (377 loc) · 10.7 KB
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#include <assert.h>
#include <climits>
#include <cstring>
#include <dirent.h>
#include <inttypes.h>
#include <iostream>
#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef JSON_TEST_STRINGS
#define JSON_TEST_STRINGS
#endif
#include "simdjson/common_defs.h"
char *fullpath;
size_t bad_string;
size_t good_string;
size_t empty_string;
size_t total_string_length;
bool probable_bug;
// borrowed code (sajson?)
static inline bool read_hex(const char *p, unsigned &u) {
unsigned v = 0;
int i = 4;
while (i--) {
unsigned char c = *p++;
if (c >= '0' && c <= '9') {
c -= '0';
} else if (c >= 'a' && c <= 'f') {
c = c - 'a' + 10;
} else if (c >= 'A' && c <= 'F') {
c = c - 'A' + 10;
} else {
return false;
}
v = (v << 4) + c;
}
u = v;
return true;
}
static inline void write_utf8(unsigned codepoint, char *&end) {
if (codepoint < 0x80) {
*end++ = codepoint;
} else if (codepoint < 0x800) {
*end++ = 0xC0 | (codepoint >> 6);
*end++ = 0x80 | (codepoint & 0x3F);
} else if (codepoint < 0x10000) {
*end++ = 0xE0 | (codepoint >> 12);
*end++ = 0x80 | ((codepoint >> 6) & 0x3F);
*end++ = 0x80 | (codepoint & 0x3F);
} else {
assert(codepoint < 0x200000);
*end++ = 0xF0 | (codepoint >> 18);
*end++ = 0x80 | ((codepoint >> 12) & 0x3F);
*end++ = 0x80 | ((codepoint >> 6) & 0x3F);
*end++ = 0x80 | (codepoint & 0x3F);
}
}
static bool parse_string(const char *p, char *output, char **end) {
if (*p != '"')
return false;
p++;
for (;;) {
#if (CHAR_MIN < 0) || (!defined(CHAR_MIN)) // the '!defined' is just paranoia
// in this path, char is *signed*
if ((*p >= 0 && *p < 0x20)) {
return false; // unescaped
}
#else
// we have unsigned chars
if (*p < 0x20) {
return false; // unescaped
}
#endif
switch (*p) {
case '"':
*output = '\0'; // end
*end = output;
return true;
case '\\':
++p;
char replacement;
switch (*p) {
case '"':
replacement = '"';
goto replace;
case '\\':
replacement = '\\';
goto replace;
case '/':
replacement = '/';
goto replace;
case 'b':
replacement = '\b';
goto replace;
case 'f':
replacement = '\f';
goto replace;
case 'n':
replacement = '\n';
goto replace;
case 'r':
replacement = '\r';
goto replace;
case 't':
replacement = '\t';
goto replace;
replace:
*output++ = replacement;
++p;
break;
case 'u': {
++p;
unsigned u;
if (!read_hex(p, u))
return false;
p += 4;
if (u >= 0xD800 && u <= 0xDBFF) {
char p0 = p[0];
char p1 = p[1];
if (p0 != '\\' || p1 != 'u') {
return false;
}
p += 2;
unsigned v;
if (!read_hex(p, v))
return false;
p += 4;
if (v < 0xDC00 || v > 0xDFFF) {
return false;
}
u = 0x10000 + (((u - 0xD800) << 10) | (v - 0xDC00));
}
write_utf8(u, output);
break;
}
default:
return false;
}
break;
default:
// validate UTF-8
unsigned char c0 = p[0];
if (c0 < 128) {
*output++ = *p++;
} else if (c0 < 224) {
unsigned char c1 = p[1];
if (c1 < 128 || c1 >= 192) {
return false;
}
output[0] = c0;
output[1] = c1;
output += 2;
p += 2;
} else if (c0 < 240) {
unsigned char c1 = p[1];
if (c1 < 128 || c1 >= 192) {
return false;
}
unsigned char c2 = p[2];
if (c2 < 128 || c2 >= 192) {
return false;
}
output[0] = c0;
output[1] = c1;
output[2] = c2;
output += 3;
p += 3;
} else if (c0 < 248) {
unsigned char c1 = p[1];
if (c1 < 128 || c1 >= 192) {
return false;
}
unsigned char c2 = p[2];
if (c2 < 128 || c2 >= 192) {
return false;
}
unsigned char c3 = p[3];
if (c3 < 128 || c3 >= 192) {
return false;
}
output[0] = c0;
output[1] = c1;
output[2] = c2;
output[3] = c3;
output += 4;
p += 4;
} else {
return false;
}
break;
}
}
}
// end of borrowed code
char *big_buffer; // global variable
void found_bad_string(const uint8_t *buf) {
bad_string++;
char *end;
if (parse_string((const char *)buf, big_buffer, &end)) {
printf("WARNING: Sajson-like parser seems to think that the string is "
"valid %32s \n",
buf);
probable_bug = true;
}
}
void print_hex(const char *s, size_t len) {
for (size_t i = 0; i < len; i++) {
printf("%02x ", s[i] & 0xFF);
}
}
void print_cmp_hex(const char *s1, const char *s2, size_t len) {
for (size_t i = 0; i < len; i++) {
printf("%02x ", (s1[i] ^ s2[i]) & 0xFF);
}
}
void found_string(const uint8_t *buf, const uint8_t *parsed_begin,
const uint8_t *parsed_end) {
size_t this_len = parsed_end - parsed_begin;
total_string_length += this_len;
good_string++;
char *end = NULL;
if (!parse_string((const char *)buf, big_buffer, &end)) {
printf("WARNING: reference parser seems to think that the string is NOT "
"valid %32s \n",
buf);
}
if (end == big_buffer) {
// we have a zero-length string
if (parsed_begin != parsed_end) {
printf("WARNING: We have a zero-length but gap is %zu \n",
(size_t)(parsed_end - parsed_begin));
probable_bug = true;
}
empty_string++;
return;
}
size_t len = end - big_buffer;
if (len != this_len) {
printf("WARNING: lengths on parsed strings disagree %zu %zu \n", this_len,
len);
printf("\nour parsed string : '%*s'\n\n", (int)this_len,
(const char *)parsed_begin);
print_hex((const char *)parsed_begin, this_len);
printf("\n");
printf("reference parsing :'%*s'\n\n", (int)len, big_buffer);
print_hex((const char *)big_buffer, len);
printf("\n");
probable_bug = true;
}
if (memcmp(big_buffer, parsed_begin, this_len) != 0) {
printf("WARNING: parsed strings disagree \n");
printf("Lengths %zu %zu \n", this_len, len);
printf("\nour parsed string : '%*s'\n", (int)this_len,
(const char *)parsed_begin);
print_hex((const char *)parsed_begin, this_len);
printf("\n");
printf("reference parsing :'%*s'\n", (int)len, big_buffer);
print_hex((const char *)big_buffer, len);
printf("\n");
print_cmp_hex((const char *)parsed_begin, big_buffer, this_len);
probable_bug = true;
}
}
#include "simdjson/jsonparser.h"
#include "src/stage2_build_tape.cpp"
/**
* Does the file filename ends with the given extension.
*/
static bool has_extension(const char *filename, const char *extension) {
const char *ext = strrchr(filename, '.');
return (ext && !strcmp(ext, extension));
}
bool starts_with(const char *pre, const char *str) {
size_t lenpre = strlen(pre), lenstr = strlen(str);
return lenstr < lenpre ? false : strncmp(pre, str, lenpre) == 0;
}
bool validate(const char *dirname) {
size_t total_strings = 0;
probable_bug = false;
const char *extension = ".json";
size_t dirlen = strlen(dirname);
struct dirent **entry_list;
int c = scandir(dirname, &entry_list, 0, alphasort);
if (c < 0) {
printf("error accessing %s \n", dirname);
return false;
}
if (c == 0) {
printf("nothing in dir %s \n", dirname);
return false;
}
bool needsep = (strlen(dirname) > 1) && (dirname[strlen(dirname) - 1] != '/');
for (int i = 0; i < c; i++) {
const char *name = entry_list[i]->d_name;
if (has_extension(name, extension)) {
size_t filelen = strlen(name);
fullpath = (char *)malloc(dirlen + filelen + 1 + 1);
strcpy(fullpath, dirname);
if (needsep) {
fullpath[dirlen] = '/';
strcpy(fullpath + dirlen + 1, name);
} else {
strcpy(fullpath + dirlen, name);
}
simdjson::padded_string p;
try {
simdjson::get_corpus(fullpath).swap(p);
} catch (const std::exception &e) {
std::cout << "Could not load the file " << fullpath << std::endl;
return EXIT_FAILURE;
}
simdjson::ParsedJson pj;
bool allocok = pj.allocate_capacity(p.size(), 1024);
if (!allocok) {
std::cerr << "can't allocate memory" << std::endl;
return false;
}
big_buffer = (char *)malloc(p.size());
if (big_buffer == NULL) {
std::cerr << "can't allocate memory" << std::endl;
return false;
}
bad_string = 0;
good_string = 0;
total_string_length = 0;
empty_string = 0;
bool isok = json_parse(p, pj);
free(big_buffer);
if (good_string > 0) {
printf("File %40s %s --- bad strings: %10zu \tgood strings: %10zu\t "
"empty strings: %10zu "
"\taverage string length: %.1f \n",
name, isok ? " is valid " : " is not valid ", bad_string,
good_string, empty_string,
(double)total_string_length / good_string);
} else if (bad_string > 0) {
printf("File %40s %s --- bad strings: %10zu \n", name,
isok ? " is valid " : " is not valid ", bad_string);
}
total_strings += bad_string + good_string;
free(fullpath);
}
}
printf("%zu strings checked.\n", total_strings);
if (probable_bug) {
fprintf(stderr, "STRING PARSING FAILS?\n");
} else {
printf("All ok.\n");
}
for (int i = 0; i < c; ++i)
free(entry_list[i]);
free(entry_list);
return probable_bug == false;
}
int main(int argc, char *argv[]) {
if (argc != 2) {
std::cerr << "Usage: " << argv[0] << " <directorywithjsonfiles>"
<< std::endl;
#if defined(SIMDJSON_TEST_DATA_DIR) && defined(SIMDJSON_BENCHMARK_DATA_DIR)
std::cout << "We are going to assume you mean to use the '"
<< SIMDJSON_TEST_DATA_DIR << "' and '"
<< SIMDJSON_BENCHMARK_DATA_DIR << "'directories." << std::endl;
return validate(SIMDJSON_TEST_DATA_DIR) &&
validate(SIMDJSON_BENCHMARK_DATA_DIR)
? EXIT_SUCCESS
: EXIT_FAILURE;
#else
std::cout << "We are going to assume you mean to use the 'jsonchecker' and "
"'jsonexamples' directories."
<< std::endl;
return validate("jsonchecker/") && validate("jsonexamples/") ? EXIT_SUCCESS
: EXIT_FAILURE;
#endif
}
return validate(argv[1]) ? EXIT_SUCCESS : EXIT_FAILURE;
}
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