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dump.c
1244 lines (1136 loc) · 36.3 KB
/
dump.c
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// Copyright (c) 2012, 2017 Peter Ohler. All rights reserved.
// Licensed under the MIT License. See LICENSE file in the project root for license details.
#include "dump.h"
#include <errno.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "cache8.h"
#include "odd.h"
#include "oj.h"
#include "trace.h"
#include "util.h"
// Workaround in case INFINITY is not defined in math.h or if the OS is CentOS
#define OJ_INFINITY (1.0 / 0.0)
#define MAX_DEPTH 1000
static const char inf_val[] = INF_VAL;
static const char ninf_val[] = NINF_VAL;
static const char nan_val[] = NAN_VAL;
typedef unsigned long ulong;
static size_t hibit_friendly_size(const uint8_t *str, size_t len);
static size_t xss_friendly_size(const uint8_t *str, size_t len);
static size_t ascii_friendly_size(const uint8_t *str, size_t len);
static const char hex_chars[17] = "0123456789abcdef";
// JSON standard except newlines are no escaped
static char newline_friendly_chars[256] = "\
66666666221622666666666666666666\
11211111111111111111111111111111\
11111111111111111111111111112111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111";
// JSON standard
static char hibit_friendly_chars[256] = "\
66666666222622666666666666666666\
11211111111111111111111111111111\
11111111111111111111111111112111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111";
// High bit set characters are always encoded as unicode. Worse case is 3
// bytes per character in the output. That makes this conservative.
static char ascii_friendly_chars[256] = "\
66666666222622666666666666666666\
11211111111111111111111111111111\
11111111111111111111111111112111\
11111111111111111111111111111116\
33333333333333333333333333333333\
33333333333333333333333333333333\
33333333333333333333333333333333\
33333333333333333333333333333333";
// XSS safe mode
static char xss_friendly_chars[256] = "\
66666666222622666666666666666666\
11211161111111121111111111116161\
11111111111111111111111111112111\
11111111111111111111111111111116\
33333333333333333333333333333333\
33333333333333333333333333333333\
33333333333333333333333333333333\
33333333333333333333333333333333";
// JSON XSS combo
static char hixss_friendly_chars[256] = "\
66666666222622666666666666666666\
11211111111111111111111111111111\
11111111111111111111111111112111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11611111111111111111111111111111";
// Rails XSS combo
static char rails_xss_friendly_chars[256] = "\
66666666222622666666666666666666\
11211161111111111111111111116161\
11111111111111111111111111112111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11611111111111111111111111111111";
// Rails HTML non-escape
static char rails_friendly_chars[256] = "\
66666666222622666666666666666666\
11211111111111111111111111111111\
11111111111111111111111111112111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111\
11111111111111111111111111111111";
static void raise_strict(VALUE obj) {
rb_raise(rb_eTypeError,
"Failed to dump %s Object to JSON in strict mode.",
rb_class2name(rb_obj_class(obj)));
}
inline static size_t newline_friendly_size(const uint8_t *str, size_t len) {
size_t size = 0;
size_t i = len;
for (; 0 < i; str++, i--) {
size += newline_friendly_chars[*str];
}
return size - len * (size_t)'0';
}
inline static size_t hibit_friendly_size(const uint8_t *str, size_t len) {
size_t size = 0;
size_t i = len;
for (; 0 < i; str++, i--) {
size += hibit_friendly_chars[*str];
}
return size - len * (size_t)'0';
}
inline static size_t ascii_friendly_size(const uint8_t *str, size_t len) {
size_t size = 0;
size_t i = len;
for (; 0 < i; str++, i--) {
size += ascii_friendly_chars[*str];
}
return size - len * (size_t)'0';
}
inline static size_t xss_friendly_size(const uint8_t *str, size_t len) {
size_t size = 0;
size_t i = len;
for (; 0 < i; str++, i--) {
size += xss_friendly_chars[*str];
}
return size - len * (size_t)'0';
}
inline static size_t hixss_friendly_size(const uint8_t *str, size_t len) {
size_t size = 0;
size_t i = len;
bool check = false;
for (; 0 < i; str++, i--) {
size += hixss_friendly_chars[*str];
if (0 != (0x80 & *str)) {
check = true;
}
}
return size - len * (size_t)'0' + check;
}
inline static long rails_xss_friendly_size(const uint8_t *str, size_t len) {
long size = 0;
size_t i = len;
uint8_t hi = 0;
for (; 0 < i; str++, i--) {
size += rails_xss_friendly_chars[*str];
hi |= *str & 0x80;
}
if (0 == hi) {
return size - len * (size_t)'0';
}
return -(size - len * (size_t)'0');
}
inline static size_t rails_friendly_size(const uint8_t *str, size_t len) {
size_t size = 0;
size_t i = len;
for (; 0 < i; str++, i--) {
size += rails_friendly_chars[*str];
}
return size - len * (size_t)'0';
}
const char *oj_nan_str(VALUE obj, int opt, int mode, bool plus, int *lenp) {
const char *str = NULL;
if (AutoNan == opt) {
switch (mode) {
case CompatMode: opt = WordNan; break;
case StrictMode: opt = RaiseNan; break;
default: break;
}
}
switch (opt) {
case RaiseNan: raise_strict(obj); break;
case WordNan:
if (plus) {
str = "Infinity";
*lenp = 8;
} else {
str = "-Infinity";
*lenp = 9;
}
break;
case NullNan:
str = "null";
*lenp = 4;
break;
case HugeNan:
default:
if (plus) {
str = inf_val;
*lenp = sizeof(inf_val) - 1;
} else {
str = ninf_val;
*lenp = sizeof(ninf_val) - 1;
}
break;
}
return str;
}
inline static void dump_hex(uint8_t c, Out out) {
uint8_t d = (c >> 4) & 0x0F;
*out->cur++ = hex_chars[d];
d = c & 0x0F;
*out->cur++ = hex_chars[d];
}
static void raise_invalid_unicode(const char *str, int len, int pos) {
char c;
char code[32];
char * cp = code;
int i;
uint8_t d;
*cp++ = '[';
for (i = pos; i < len && i - pos < 5; i++) {
c = str[i];
d = (c >> 4) & 0x0F;
*cp++ = hex_chars[d];
d = c & 0x0F;
*cp++ = hex_chars[d];
*cp++ = ' ';
}
cp--;
*cp++ = ']';
*cp = '\0';
rb_raise(oj_json_generator_error_class, "Invalid Unicode %s at %d", code, pos);
}
static const char *dump_unicode(const char *str, const char *end, Out out, const char *orig) {
uint32_t code = 0;
uint8_t b = *(uint8_t *)str;
int i, cnt;
if (0xC0 == (0xE0 & b)) {
cnt = 1;
code = b & 0x0000001F;
} else if (0xE0 == (0xF0 & b)) {
cnt = 2;
code = b & 0x0000000F;
} else if (0xF0 == (0xF8 & b)) {
cnt = 3;
code = b & 0x00000007;
} else if (0xF8 == (0xFC & b)) {
cnt = 4;
code = b & 0x00000003;
} else if (0xFC == (0xFE & b)) {
cnt = 5;
code = b & 0x00000001;
} else {
cnt = 0;
raise_invalid_unicode(orig, (int)(end - orig), (int)(str - orig));
}
str++;
for (; 0 < cnt; cnt--, str++) {
b = *(uint8_t *)str;
if (end <= str || 0x80 != (0xC0 & b)) {
raise_invalid_unicode(orig, (int)(end - orig), (int)(str - orig));
}
code = (code << 6) | (b & 0x0000003F);
}
if (0x0000FFFF < code) {
uint32_t c1;
code -= 0x00010000;
c1 = ((code >> 10) & 0x000003FF) + 0x0000D800;
code = (code & 0x000003FF) + 0x0000DC00;
*out->cur++ = '\\';
*out->cur++ = 'u';
for (i = 3; 0 <= i; i--) {
*out->cur++ = hex_chars[(uint8_t)(c1 >> (i * 4)) & 0x0F];
}
}
*out->cur++ = '\\';
*out->cur++ = 'u';
for (i = 3; 0 <= i; i--) {
*out->cur++ = hex_chars[(uint8_t)(code >> (i * 4)) & 0x0F];
}
return str - 1;
}
static const char *check_unicode(const char *str, const char *end, const char *orig) {
uint8_t b = *(uint8_t *)str;
int cnt = 0;
if (0xC0 == (0xE0 & b)) {
cnt = 1;
} else if (0xE0 == (0xF0 & b)) {
cnt = 2;
} else if (0xF0 == (0xF8 & b)) {
cnt = 3;
} else if (0xF8 == (0xFC & b)) {
cnt = 4;
} else if (0xFC == (0xFE & b)) {
cnt = 5;
} else {
raise_invalid_unicode(orig, (int)(end - orig), (int)(str - orig));
}
str++;
for (; 0 < cnt; cnt--, str++) {
b = *(uint8_t *)str;
if (end <= str || 0x80 != (0xC0 & b)) {
raise_invalid_unicode(orig, (int)(end - orig), (int)(str - orig));
}
}
return str;
}
// Returns 0 if not using circular references, -1 if no further writing is
// needed (duplicate), and a positive value if the object was added to the
// cache.
long oj_check_circular(VALUE obj, Out out) {
slot_t id = 0;
slot_t *slot;
if (Yes == out->opts->circular) {
if (0 == (id = oj_cache8_get(out->circ_cache, obj, &slot))) {
out->circ_cnt++;
id = out->circ_cnt;
*slot = id;
} else {
if (ObjectMode == out->opts->mode) {
assure_size(out, 18);
*out->cur++ = '"';
*out->cur++ = '^';
*out->cur++ = 'r';
dump_ulong(id, out);
*out->cur++ = '"';
}
return -1;
}
}
return (long)id;
}
void oj_dump_time(VALUE obj, Out out, int withZone) {
char buf[64];
char * b = buf + sizeof(buf) - 1;
long size;
char * dot;
int neg = 0;
long one = 1000000000;
long long sec;
long long nsec;
#ifdef HAVE_RB_TIME_TIMESPEC
// rb_time_timespec as well as rb_time_timeeval have a bug that causes an
// exception to be raised if a time is before 1970 on 32 bit systems so
// check the timespec size and use the ruby calls if a 32 bit system.
if (16 <= sizeof(struct timespec)) {
struct timespec ts = rb_time_timespec(obj);
sec = (long long)ts.tv_sec;
nsec = ts.tv_nsec;
} else {
sec = rb_num2ll(rb_funcall2(obj, oj_tv_sec_id, 0, 0));
nsec = rb_num2ll(rb_funcall2(obj, oj_tv_nsec_id, 0, 0));
}
#else
sec = rb_num2ll(rb_funcall2(obj, oj_tv_sec_id, 0, 0));
nsec = rb_num2ll(rb_funcall2(obj, oj_tv_nsec_id, 0, 0));
#endif
*b-- = '\0';
if (withZone) {
long tzsecs = NUM2LONG(rb_funcall2(obj, oj_utc_offset_id, 0, 0));
int zneg = (0 > tzsecs);
if (0 == tzsecs && rb_funcall2(obj, oj_utcq_id, 0, 0)) {
tzsecs = 86400;
}
if (zneg) {
tzsecs = -tzsecs;
}
if (0 == tzsecs) {
*b-- = '0';
} else {
for (; 0 < tzsecs; b--, tzsecs /= 10) {
*b = '0' + (tzsecs % 10);
}
if (zneg) {
*b-- = '-';
}
}
*b-- = 'e';
}
if (0 > sec) {
neg = 1;
sec = -sec;
if (0 < nsec) {
nsec = 1000000000 - nsec;
sec--;
}
}
dot = b - 9;
if (0 < out->opts->sec_prec) {
if (9 > out->opts->sec_prec) {
int i;
for (i = 9 - out->opts->sec_prec; 0 < i; i--) {
dot++;
nsec = (nsec + 5) / 10;
one /= 10;
}
}
if (one <= nsec) {
nsec -= one;
sec++;
}
for (; dot < b; b--, nsec /= 10) {
*b = '0' + (nsec % 10);
}
*b-- = '.';
}
if (0 == sec) {
*b-- = '0';
} else {
for (; 0 < sec; b--, sec /= 10) {
*b = '0' + (sec % 10);
}
}
if (neg) {
*b-- = '-';
}
b++;
size = sizeof(buf) - (b - buf) - 1;
assure_size(out, size);
memcpy(out->cur, b, size);
out->cur += size;
*out->cur = '\0';
}
void oj_dump_ruby_time(VALUE obj, Out out) {
volatile VALUE rstr = rb_funcall(obj, oj_to_s_id, 0);
oj_dump_cstr(RSTRING_PTR(rstr), (int)RSTRING_LEN(rstr), 0, 0, out);
}
void oj_dump_xml_time(VALUE obj, Out out) {
char buf[64];
struct _timeInfo ti;
long one = 1000000000;
int64_t sec;
long long nsec;
long tzsecs = NUM2LONG(rb_funcall2(obj, oj_utc_offset_id, 0, 0));
int tzhour, tzmin;
char tzsign = '+';
#ifdef HAVE_RB_TIME_TIMESPEC
if (16 <= sizeof(struct timespec)) {
struct timespec ts = rb_time_timespec(obj);
sec = ts.tv_sec;
nsec = ts.tv_nsec;
} else {
sec = rb_num2ll(rb_funcall2(obj, oj_tv_sec_id, 0, 0));
nsec = rb_num2ll(rb_funcall2(obj, oj_tv_nsec_id, 0, 0));
}
#else
sec = rb_num2ll(rb_funcall2(obj, oj_tv_sec_id, 0, 0));
nsec = rb_num2ll(rb_funcall2(obj, oj_tv_nsec_id, 0, 0));
#endif
assure_size(out, 36);
if (9 > out->opts->sec_prec) {
int i;
// This is pretty lame but to be compatible with rails and active
// support rounding is not done but instead a floor is done when
// second precision is 3 just to be like rails. sigh.
if (3 == out->opts->sec_prec) {
nsec /= 1000000;
one = 1000;
} else {
for (i = 9 - out->opts->sec_prec; 0 < i; i--) {
nsec = (nsec + 5) / 10;
one /= 10;
}
if (one <= nsec) {
nsec -= one;
sec++;
}
}
}
// 2012-01-05T23:58:07.123456000+09:00
// tm = localtime(&sec);
sec += tzsecs;
sec_as_time((int64_t)sec, &ti);
if (0 > tzsecs) {
tzsign = '-';
tzhour = (int)(tzsecs / -3600);
tzmin = (int)(tzsecs / -60) - (tzhour * 60);
} else {
tzhour = (int)(tzsecs / 3600);
tzmin = (int)(tzsecs / 60) - (tzhour * 60);
}
if ((0 == nsec && !out->opts->sec_prec_set) || 0 == out->opts->sec_prec) {
if (0 == tzsecs && rb_funcall2(obj, oj_utcq_id, 0, 0)) {
int len = sprintf(buf,
"%04d-%02d-%02dT%02d:%02d:%02dZ",
ti.year,
ti.mon,
ti.day,
ti.hour,
ti.min,
ti.sec);
oj_dump_cstr(buf, len, 0, 0, out);
} else {
int len = sprintf(buf,
"%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
ti.year,
ti.mon,
ti.day,
ti.hour,
ti.min,
ti.sec,
tzsign,
tzhour,
tzmin);
oj_dump_cstr(buf, len, 0, 0, out);
}
} else if (0 == tzsecs && rb_funcall2(obj, oj_utcq_id, 0, 0)) {
char format[64] = "%04d-%02d-%02dT%02d:%02d:%02d.%09ldZ";
int len;
if (9 > out->opts->sec_prec) {
format[32] = '0' + out->opts->sec_prec;
}
len = sprintf(buf, format, ti.year, ti.mon, ti.day, ti.hour, ti.min, ti.sec, (long)nsec);
oj_dump_cstr(buf, len, 0, 0, out);
} else {
char format[64] = "%04d-%02d-%02dT%02d:%02d:%02d.%09ld%c%02d:%02d";
int len;
if (9 > out->opts->sec_prec) {
format[32] = '0' + out->opts->sec_prec;
}
len = sprintf(buf,
format,
ti.year,
ti.mon,
ti.day,
ti.hour,
ti.min,
ti.sec,
(long)nsec,
tzsign,
tzhour,
tzmin);
oj_dump_cstr(buf, len, 0, 0, out);
}
}
void oj_dump_obj_to_json(VALUE obj, Options copts, Out out) {
oj_dump_obj_to_json_using_params(obj, copts, out, 0, 0);
}
void oj_dump_obj_to_json_using_params(VALUE obj, Options copts, Out out, int argc, VALUE *argv) {
if (0 == out->buf) {
out->buf = ALLOC_N(char, 4096);
// 1 less than end plus extra for possible errors
out->end = out->buf + 4095 - BUFFER_EXTRA;
out->allocated = true;
}
out->cur = out->buf;
out->circ_cnt = 0;
out->opts = copts;
out->hash_cnt = 0;
out->indent = copts->indent;
out->argc = argc;
out->argv = argv;
out->ropts = NULL;
if (Yes == copts->circular) {
oj_cache8_new(&out->circ_cache);
}
switch (copts->mode) {
case StrictMode: oj_dump_strict_val(obj, 0, out); break;
case NullMode: oj_dump_null_val(obj, 0, out); break;
case ObjectMode: oj_dump_obj_val(obj, 0, out); break;
case CompatMode: oj_dump_compat_val(obj, 0, out, Yes == copts->to_json); break;
case RailsMode: oj_dump_rails_val(obj, 0, out); break;
case CustomMode: oj_dump_custom_val(obj, 0, out, true); break;
case WabMode: oj_dump_wab_val(obj, 0, out); break;
default: oj_dump_custom_val(obj, 0, out, true); break;
}
if (0 < out->indent) {
switch (*(out->cur - 1)) {
case ']':
case '}': assure_size(out, 1); *out->cur++ = '\n';
default: break;
}
}
*out->cur = '\0';
if (Yes == copts->circular) {
oj_cache8_delete(out->circ_cache);
}
}
void oj_write_obj_to_file(VALUE obj, const char *path, Options copts) {
char buf[4096];
struct _out out;
size_t size;
FILE * f;
int ok;
out.buf = buf;
out.end = buf + sizeof(buf) - BUFFER_EXTRA;
out.allocated = false;
out.omit_nil = copts->dump_opts.omit_nil;
oj_dump_obj_to_json(obj, copts, &out);
size = out.cur - out.buf;
if (0 == (f = fopen(path, "w"))) {
if (out.allocated) {
xfree(out.buf);
}
rb_raise(rb_eIOError, "%s", strerror(errno));
}
ok = (size == fwrite(out.buf, 1, size, f));
if (out.allocated) {
xfree(out.buf);
}
fclose(f);
if (!ok) {
int err = ferror(f);
rb_raise(rb_eIOError, "Write failed. [%d:%s]", err, strerror(err));
}
}
void oj_write_obj_to_stream(VALUE obj, VALUE stream, Options copts) {
char buf[4096];
struct _out out;
ssize_t size;
VALUE clas = rb_obj_class(stream);
#if !IS_WINDOWS
int fd;
VALUE s;
#endif
out.buf = buf;
out.end = buf + sizeof(buf) - BUFFER_EXTRA;
out.allocated = false;
out.omit_nil = copts->dump_opts.omit_nil;
oj_dump_obj_to_json(obj, copts, &out);
size = out.cur - out.buf;
if (oj_stringio_class == clas) {
rb_funcall(stream, oj_write_id, 1, rb_str_new(out.buf, size));
#if !IS_WINDOWS
} else if (rb_respond_to(stream, oj_fileno_id) &&
Qnil != (s = rb_funcall(stream, oj_fileno_id, 0)) && 0 != (fd = FIX2INT(s))) {
if (size != write(fd, out.buf, size)) {
if (out.allocated) {
xfree(out.buf);
}
rb_raise(rb_eIOError, "Write failed. [%d:%s]", errno, strerror(errno));
}
#endif
} else if (rb_respond_to(stream, oj_write_id)) {
rb_funcall(stream, oj_write_id, 1, rb_str_new(out.buf, size));
} else {
if (out.allocated) {
xfree(out.buf);
}
rb_raise(rb_eArgError, "to_stream() expected an IO Object.");
}
if (out.allocated) {
xfree(out.buf);
}
}
void oj_dump_str(VALUE obj, int depth, Out out, bool as_ok) {
rb_encoding *enc = rb_to_encoding(rb_obj_encoding(obj));
if (rb_utf8_encoding() != enc) {
obj = rb_str_conv_enc(obj, enc, rb_utf8_encoding());
}
oj_dump_cstr(RSTRING_PTR(obj), (int)RSTRING_LEN(obj), 0, 0, out);
}
void oj_dump_sym(VALUE obj, int depth, Out out, bool as_ok) {
// This causes a memory leak in 2.5.1. Maybe in other versions as well.
// const char *sym = rb_id2name(SYM2ID(obj));
volatile VALUE s = rb_sym_to_s(obj);
oj_dump_cstr(RSTRING_PTR(s), (int)RSTRING_LEN(s), 0, 0, out);
}
static void debug_raise(const char *orig, size_t cnt, int line) {
char buf[1024];
char * b = buf;
const char *s = orig;
const char *s_end = s + cnt;
if (32 < s_end - s) {
s_end = s + 32;
}
for (; s < s_end; s++) {
b += sprintf(b, " %02x", *s);
}
*b = '\0';
rb_raise(oj_json_generator_error_class, "Partial character in string. %s @ %d", buf, line);
}
void oj_dump_raw_json(VALUE obj, int depth, Out out) {
if (oj_string_writer_class == rb_obj_class(obj)) {
StrWriter sw = (StrWriter)DATA_PTR(obj);
size_t len = sw->out.cur - sw->out.buf;
if (0 < len) {
len--;
}
oj_dump_raw(sw->out.buf, len, out);
} else {
volatile VALUE jv;
if (Yes == out->opts->trace) {
oj_trace("raw_json", obj, __FILE__, __LINE__, depth + 1, TraceRubyIn);
}
jv = rb_funcall(obj, oj_raw_json_id, 2, RB_INT2NUM(depth), RB_INT2NUM(out->indent));
if (Yes == out->opts->trace) {
oj_trace("raw_json", obj, __FILE__, __LINE__, depth + 1, TraceRubyOut);
}
oj_dump_raw(RSTRING_PTR(jv), (size_t)RSTRING_LEN(jv), out);
}
}
void oj_dump_cstr(const char *str, size_t cnt, bool is_sym, bool escape1, Out out) {
size_t size;
char * cmap;
const char *orig = str;
bool has_hi = false;
switch (out->opts->escape_mode) {
case NLEsc:
cmap = newline_friendly_chars;
size = newline_friendly_size((uint8_t *)str, cnt);
break;
case ASCIIEsc:
cmap = ascii_friendly_chars;
size = ascii_friendly_size((uint8_t *)str, cnt);
break;
case XSSEsc:
cmap = xss_friendly_chars;
size = xss_friendly_size((uint8_t *)str, cnt);
break;
case JXEsc:
cmap = hixss_friendly_chars;
size = hixss_friendly_size((uint8_t *)str, cnt);
break;
case RailsXEsc: {
long sz;
cmap = rails_xss_friendly_chars;
sz = rails_xss_friendly_size((uint8_t *)str, cnt);
if (sz < 0) {
has_hi = true;
size = (size_t)-sz;
} else {
size = (size_t)sz;
}
break;
}
case RailsEsc:
cmap = rails_friendly_chars;
size = rails_friendly_size((uint8_t *)str, cnt);
break;
case JSONEsc:
default: cmap = hibit_friendly_chars; size = hibit_friendly_size((uint8_t *)str, cnt);
}
assure_size(out, size + BUFFER_EXTRA);
*out->cur++ = '"';
if (escape1) {
*out->cur++ = '\\';
*out->cur++ = 'u';
*out->cur++ = '0';
*out->cur++ = '0';
dump_hex((uint8_t)*str, out);
cnt--;
size--;
str++;
is_sym = 0; // just to make sure
}
if (cnt == size && !has_hi) {
if (is_sym) {
*out->cur++ = ':';
}
memcpy(out->cur, str, cnt);
out->cur += cnt;
*out->cur++ = '"';
} else {
const char *end = str + cnt;
const char *check_start = str;
if (is_sym) {
*out->cur++ = ':';
}
for (; str < end; str++) {
switch (cmap[(uint8_t)*str]) {
case '1':
if ((JXEsc == out->opts->escape_mode || RailsXEsc == out->opts->escape_mode) &&
check_start <= str) {
if (0 != (0x80 & (uint8_t)*str)) {
if (0xC0 == (0xC0 & (uint8_t)*str)) {
check_start = check_unicode(str, end, orig);
} else {
raise_invalid_unicode(orig, (int)(end - orig), (int)(str - orig));
}
}
}
*out->cur++ = *str;
break;
case '2':
*out->cur++ = '\\';
switch (*str) {
case '\\': *out->cur++ = '\\'; break;
case '\b': *out->cur++ = 'b'; break;
case '\t': *out->cur++ = 't'; break;
case '\n': *out->cur++ = 'n'; break;
case '\f': *out->cur++ = 'f'; break;
case '\r': *out->cur++ = 'r'; break;
default: *out->cur++ = *str; break;
}
break;
case '3': // Unicode
if (0xe2 == (uint8_t)*str &&
(JXEsc == out->opts->escape_mode || RailsXEsc == out->opts->escape_mode) &&
2 <= end - str) {
if (0x80 == (uint8_t)str[1] &&
(0xa8 == (uint8_t)str[2] || 0xa9 == (uint8_t)str[2])) {
str = dump_unicode(str, end, out, orig);
} else {
check_start = check_unicode(str, end, orig);
*out->cur++ = *str;
}
break;
}
str = dump_unicode(str, end, out, orig);
break;
case '6': // control characters
if (*(uint8_t *)str < 0x80) {
*out->cur++ = '\\';
*out->cur++ = 'u';
*out->cur++ = '0';
*out->cur++ = '0';
dump_hex((uint8_t)*str, out);
} else {
if (0xe2 == (uint8_t)*str &&
(JXEsc == out->opts->escape_mode || RailsXEsc == out->opts->escape_mode) &&
2 <= end - str) {
if (0x80 == (uint8_t)str[1] &&
(0xa8 == (uint8_t)str[2] || 0xa9 == (uint8_t)str[2])) {
str = dump_unicode(str, end, out, orig);
} else {
check_start = check_unicode(str, end, orig);
*out->cur++ = *str;
}
break;
}
str = dump_unicode(str, end, out, orig);
}
break;
default: break; // ignore, should never happen if the table is correct
}
}
*out->cur++ = '"';
}
if ((JXEsc == out->opts->escape_mode || RailsXEsc == out->opts->escape_mode) &&
0 < str - orig && 0 != (0x80 & *(str - 1))) {
uint8_t c = (uint8_t) * (str - 1);
int i;
int scnt = (int)(str - orig);
// Last utf-8 characters must be 0x10xxxxxx. The start must be
// 0x110xxxxx for 2 characters, 0x1110xxxx for 3, and 0x11110xxx for
// 4.
if (0 != (0x40 & c)) {
debug_raise(orig, cnt, __LINE__);
}
for (i = 1; i < (int)scnt && i < 4; i++) {
c = str[-1 - i];
if (0x80 != (0xC0 & c)) {
switch (i) {
case 1:
if (0xC0 != (0xE0 & c)) {
debug_raise(orig, cnt, __LINE__);
}
break;
case 2:
if (0xE0 != (0xF0 & c)) {
debug_raise(orig, cnt, __LINE__);
}
break;
case 3:
if (0xF0 != (0xF8 & c)) {
debug_raise(orig, cnt, __LINE__);
}
break;
default: // can't get here
break;
}
break;
}
}
if (i == (int)scnt || 4 <= i) {
debug_raise(orig, cnt, __LINE__);
}
}
*out->cur = '\0';
}
void oj_dump_class(VALUE obj, int depth, Out out, bool as_ok) {
const char *s = rb_class2name(obj);
oj_dump_cstr(s, strlen(s), 0, 0, out);
}
void oj_dump_obj_to_s(VALUE obj, Out out) {
volatile VALUE rstr = rb_funcall(obj, oj_to_s_id, 0);
oj_dump_cstr(RSTRING_PTR(rstr), (int)RSTRING_LEN(rstr), 0, 0, out);
}
void oj_dump_raw(const char *str, size_t cnt, Out out) {
assure_size(out, cnt + 10);
memcpy(out->cur, str, cnt);
out->cur += cnt;
*out->cur = '\0';
}
void oj_grow_out(Out out, size_t len) {
size_t size = out->end - out->buf;
long pos = out->cur - out->buf;
char * buf = out->buf;
size *= 2;
if (size <= len * 2 + pos) {
size += len;
}
if (out->allocated) {
REALLOC_N(buf, char, (size + BUFFER_EXTRA));
} else {
buf = ALLOC_N(char, (size + BUFFER_EXTRA));
out->allocated = true;
memcpy(buf, out->buf, out->end - out->buf + BUFFER_EXTRA);
}
if (0 == buf) {
rb_raise(rb_eNoMemError, "Failed to create string. [%d:%s]", ENOSPC, strerror(ENOSPC));
}
out->buf = buf;
out->end = buf + size;
out->cur = out->buf + pos;
}
void oj_dump_nil(VALUE obj, int depth, Out out, bool as_ok) {
assure_size(out, 4);
*out->cur++ = 'n';
*out->cur++ = 'u';
*out->cur++ = 'l';
*out->cur++ = 'l';