Ruby 1.9.3p327(2012-11-10revision37606)
ext/json/generator/generator.c
Go to the documentation of this file.
00001 #include "generator.h"
00002 
00003 #ifdef HAVE_RUBY_ENCODING_H
00004 static VALUE CEncoding_UTF_8;
00005 static ID i_encoding, i_encode;
00006 #endif
00007 
00008 static VALUE mJSON, mExt, mGenerator, cState, mGeneratorMethods, mObject,
00009              mHash, mArray, mFixnum, mBignum, mFloat, mString, mString_Extend,
00010              mTrueClass, mFalseClass, mNilClass, eGeneratorError,
00011              eNestingError, CRegexp_MULTILINE, CJSON_SAFE_STATE_PROTOTYPE,
00012              i_SAFE_STATE_PROTOTYPE;
00013 
00014 static ID i_to_s, i_to_json, i_new, i_indent, i_space, i_space_before,
00015           i_object_nl, i_array_nl, i_max_nesting, i_allow_nan, i_ascii_only,
00016           i_quirks_mode, i_pack, i_unpack, i_create_id, i_extend, i_key_p,
00017           i_aref, i_send, i_respond_to_p, i_match, i_keys, i_depth, i_dup;
00018 
00019 /*
00020  * Copyright 2001-2004 Unicode, Inc.
00021  *
00022  * Disclaimer
00023  *
00024  * This source code is provided as is by Unicode, Inc. No claims are
00025  * made as to fitness for any particular purpose. No warranties of any
00026  * kind are expressed or implied. The recipient agrees to determine
00027  * applicability of information provided. If this file has been
00028  * purchased on magnetic or optical media from Unicode, Inc., the
00029  * sole remedy for any claim will be exchange of defective media
00030  * within 90 days of receipt.
00031  *
00032  * Limitations on Rights to Redistribute This Code
00033  *
00034  * Unicode, Inc. hereby grants the right to freely use the information
00035  * supplied in this file in the creation of products supporting the
00036  * Unicode Standard, and to make copies of this file in any form
00037  * for internal or external distribution as long as this notice
00038  * remains attached.
00039  */
00040 
00041 /*
00042  * Index into the table below with the first byte of a UTF-8 sequence to
00043  * get the number of trailing bytes that are supposed to follow it.
00044  * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
00045  * left as-is for anyone who may want to do such conversion, which was
00046  * allowed in earlier algorithms.
00047  */
00048 static const char trailingBytesForUTF8[256] = {
00049     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
00050     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
00051     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
00052     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
00053     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
00054     0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
00055     1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
00056     2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
00057 };
00058 
00059 /*
00060  * Magic values subtracted from a buffer value during UTF8 conversion.
00061  * This table contains as many values as there might be trailing bytes
00062  * in a UTF-8 sequence.
00063  */
00064 static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL,
00065     0x03C82080UL, 0xFA082080UL, 0x82082080UL };
00066 
00067 /*
00068  * Utility routine to tell whether a sequence of bytes is legal UTF-8.
00069  * This must be called with the length pre-determined by the first byte.
00070  * If not calling this from ConvertUTF8to*, then the length can be set by:
00071  *  length = trailingBytesForUTF8[*source]+1;
00072  * and the sequence is illegal right away if there aren't that many bytes
00073  * available.
00074  * If presented with a length > 4, this returns 0.  The Unicode
00075  * definition of UTF-8 goes up to 4-byte sequences.
00076  */
00077 static unsigned char isLegalUTF8(const UTF8 *source, unsigned long length)
00078 {
00079     UTF8 a;
00080     const UTF8 *srcptr = source+length;
00081     switch (length) {
00082         default: return 0;
00083                  /* Everything else falls through when "1"... */
00084         case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
00085         case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
00086         case 2: if ((a = (*--srcptr)) > 0xBF) return 0;
00087 
00088                     switch (*source) {
00089                         /* no fall-through in this inner switch */
00090                         case 0xE0: if (a < 0xA0) return 0; break;
00091                         case 0xED: if (a > 0x9F) return 0; break;
00092                         case 0xF0: if (a < 0x90) return 0; break;
00093                         case 0xF4: if (a > 0x8F) return 0; break;
00094                         default:   if (a < 0x80) return 0;
00095                     }
00096 
00097         case 1: if (*source >= 0x80 && *source < 0xC2) return 0;
00098     }
00099     if (*source > 0xF4) return 0;
00100     return 1;
00101 }
00102 
00103 /* Escapes the UTF16 character and stores the result in the buffer buf. */
00104 static void unicode_escape(char *buf, UTF16 character)
00105 {
00106     const char *digits = "0123456789abcdef";
00107 
00108     buf[2] = digits[character >> 12];
00109     buf[3] = digits[(character >> 8) & 0xf];
00110     buf[4] = digits[(character >> 4) & 0xf];
00111     buf[5] = digits[character & 0xf];
00112 }
00113 
00114 /* Escapes the UTF16 character and stores the result in the buffer buf, then
00115  * the buffer buf іs appended to the FBuffer buffer. */
00116 static void unicode_escape_to_buffer(FBuffer *buffer, char buf[6], UTF16
00117         character)
00118 {
00119     unicode_escape(buf, character);
00120     fbuffer_append(buffer, buf, 6);
00121 }
00122 
00123 /* Converts string to a JSON string in FBuffer buffer, where all but the ASCII
00124  * and control characters are JSON escaped. */
00125 static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string)
00126 {
00127     const UTF8 *source = (UTF8 *) RSTRING_PTR(string);
00128     const UTF8 *sourceEnd = source + RSTRING_LEN(string);
00129     char buf[6] = { '\\', 'u' };
00130 
00131     while (source < sourceEnd) {
00132         UTF32 ch = 0;
00133         unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
00134         if (source + extraBytesToRead >= sourceEnd) {
00135             rb_raise(rb_path2class("JSON::GeneratorError"),
00136                     "partial character in source, but hit end");
00137         }
00138         if (!isLegalUTF8(source, extraBytesToRead+1)) {
00139             rb_raise(rb_path2class("JSON::GeneratorError"),
00140                     "source sequence is illegal/malformed utf-8");
00141         }
00142         /*
00143          * The cases all fall through. See "Note A" below.
00144          */
00145         switch (extraBytesToRead) {
00146             case 5: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
00147             case 4: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
00148             case 3: ch += *source++; ch <<= 6;
00149             case 2: ch += *source++; ch <<= 6;
00150             case 1: ch += *source++; ch <<= 6;
00151             case 0: ch += *source++;
00152         }
00153         ch -= offsetsFromUTF8[extraBytesToRead];
00154 
00155         if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
00156             /* UTF-16 surrogate values are illegal in UTF-32 */
00157             if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
00158 #if UNI_STRICT_CONVERSION
00159                 source -= (extraBytesToRead+1); /* return to the illegal value itself */
00160                 rb_raise(rb_path2class("JSON::GeneratorError"),
00161                         "source sequence is illegal/malformed utf-8");
00162 #else
00163                 unicode_escape_to_buffer(buffer, buf, UNI_REPLACEMENT_CHAR);
00164 #endif
00165             } else {
00166                 /* normal case */
00167                 if (ch >= 0x20 && ch <= 0x7f) {
00168                     switch (ch) {
00169                         case '\\':
00170                             fbuffer_append(buffer, "\\\\", 2);
00171                             break;
00172                         case '"':
00173                             fbuffer_append(buffer, "\\\"", 2);
00174                             break;
00175                         default:
00176                             fbuffer_append_char(buffer, (char)ch);
00177                             break;
00178                     }
00179                 } else {
00180                     switch (ch) {
00181                         case '\n':
00182                             fbuffer_append(buffer, "\\n", 2);
00183                             break;
00184                         case '\r':
00185                             fbuffer_append(buffer, "\\r", 2);
00186                             break;
00187                         case '\t':
00188                             fbuffer_append(buffer, "\\t", 2);
00189                             break;
00190                         case '\f':
00191                             fbuffer_append(buffer, "\\f", 2);
00192                             break;
00193                         case '\b':
00194                             fbuffer_append(buffer, "\\b", 2);
00195                             break;
00196                         default:
00197                             unicode_escape_to_buffer(buffer, buf, (UTF16) ch);
00198                             break;
00199                     }
00200                 }
00201             }
00202         } else if (ch > UNI_MAX_UTF16) {
00203 #if UNI_STRICT_CONVERSION
00204             source -= (extraBytesToRead+1); /* return to the start */
00205             rb_raise(rb_path2class("JSON::GeneratorError"),
00206                     "source sequence is illegal/malformed utf8");
00207 #else
00208             unicode_escape_to_buffer(buffer, buf, UNI_REPLACEMENT_CHAR);
00209 #endif
00210         } else {
00211             /* target is a character in range 0xFFFF - 0x10FFFF. */
00212             ch -= halfBase;
00213             unicode_escape_to_buffer(buffer, buf, (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START));
00214             unicode_escape_to_buffer(buffer, buf, (UTF16)((ch & halfMask) + UNI_SUR_LOW_START));
00215         }
00216     }
00217 }
00218 
00219 /* Converts string to a JSON string in FBuffer buffer, where only the
00220  * characters required by the JSON standard are JSON escaped. The remaining
00221  * characters (should be UTF8) are just passed through and appended to the
00222  * result. */
00223 static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string)
00224 {
00225     const char *ptr = RSTRING_PTR(string), *p;
00226     unsigned long len = RSTRING_LEN(string), start = 0, end = 0;
00227     const char *escape = NULL;
00228     int escape_len;
00229     unsigned char c;
00230     char buf[6] = { '\\', 'u' };
00231 
00232     for (start = 0, end = 0; end < len;) {
00233         p = ptr + end;
00234         c = (unsigned char) *p;
00235         if (c < 0x20) {
00236             switch (c) {
00237                 case '\n':
00238                     escape = "\\n";
00239                     escape_len = 2;
00240                     break;
00241                 case '\r':
00242                     escape = "\\r";
00243                     escape_len = 2;
00244                     break;
00245                 case '\t':
00246                     escape = "\\t";
00247                     escape_len = 2;
00248                     break;
00249                 case '\f':
00250                     escape = "\\f";
00251                     escape_len = 2;
00252                     break;
00253                 case '\b':
00254                     escape = "\\b";
00255                     escape_len = 2;
00256                     break;
00257                 default:
00258                     unicode_escape(buf, (UTF16) *p);
00259                     escape = buf;
00260                     escape_len = 6;
00261                     break;
00262             }
00263         } else {
00264             switch (c) {
00265                 case '\\':
00266                     escape = "\\\\";
00267                     escape_len = 2;
00268                     break;
00269                 case '"':
00270                     escape =  "\\\"";
00271                     escape_len = 2;
00272                     break;
00273                 default:
00274                     end++;
00275                     continue;
00276                     break;
00277             }
00278         }
00279         fbuffer_append(buffer, ptr + start, end - start);
00280         fbuffer_append(buffer, escape, escape_len);
00281         start = ++end;
00282         escape = NULL;
00283     }
00284     fbuffer_append(buffer, ptr + start, end - start);
00285 }
00286 
00287 static char *fstrndup(const char *ptr, unsigned long len) {
00288   char *result;
00289   if (len <= 0) return NULL;
00290   result = ALLOC_N(char, len);
00291   memccpy(result, ptr, 0, len);
00292   return result;
00293 }
00294 
00295 /* fbuffer implementation */
00296 
00297 static FBuffer *fbuffer_alloc()
00298 {
00299     FBuffer *fb = ALLOC(FBuffer);
00300     memset((void *) fb, 0, sizeof(FBuffer));
00301     fb->initial_length = FBUFFER_INITIAL_LENGTH;
00302     return fb;
00303 }
00304 
00305 static FBuffer *fbuffer_alloc_with_length(unsigned long initial_length)
00306 {
00307     FBuffer *fb;
00308     assert(initial_length > 0);
00309     fb = ALLOC(FBuffer);
00310     memset((void *) fb, 0, sizeof(FBuffer));
00311     fb->initial_length = initial_length;
00312     return fb;
00313 }
00314 
00315 static void fbuffer_free(FBuffer *fb)
00316 {
00317     if (fb->ptr) ruby_xfree(fb->ptr);
00318     ruby_xfree(fb);
00319 }
00320 
00321 static void fbuffer_clear(FBuffer *fb)
00322 {
00323     fb->len = 0;
00324 }
00325 
00326 static void fbuffer_inc_capa(FBuffer *fb, unsigned long requested)
00327 {
00328     unsigned long required;
00329 
00330     if (!fb->ptr) {
00331         fb->ptr = ALLOC_N(char, fb->initial_length);
00332         fb->capa = fb->initial_length;
00333     }
00334 
00335     for (required = fb->capa; requested > required - fb->len; required <<= 1);
00336 
00337     if (required > fb->capa) {
00338         REALLOC_N(fb->ptr, char, required);
00339         fb->capa = required;
00340     }
00341 }
00342 
00343 static void fbuffer_append(FBuffer *fb, const char *newstr, unsigned long len)
00344 {
00345     if (len > 0) {
00346         fbuffer_inc_capa(fb, len);
00347         MEMCPY(fb->ptr + fb->len, newstr, char, len);
00348         fb->len += len;
00349     }
00350 }
00351 
00352 static void fbuffer_append_str(FBuffer *fb, VALUE str)
00353 {
00354     const char *newstr = StringValuePtr(str);
00355     unsigned long len = RSTRING_LEN(str);
00356 
00357     RB_GC_GUARD(str);
00358 
00359     fbuffer_append(fb, newstr, len);
00360 }
00361 
00362 static void fbuffer_append_char(FBuffer *fb, char newchr)
00363 {
00364     fbuffer_inc_capa(fb, 1);
00365     *(fb->ptr + fb->len) = newchr;
00366     fb->len++;
00367 }
00368 
00369 static void freverse(char *start, char *end)
00370 {
00371     char c;
00372 
00373     while (end > start) {
00374         c = *end, *end-- = *start, *start++ = c;
00375     }
00376 }
00377 
00378 static long fltoa(long number, char *buf)
00379 {
00380     static char digits[] = "0123456789";
00381     long sign = number;
00382     char* tmp = buf;
00383 
00384     if (sign < 0) number = -number;
00385     do *tmp++ = digits[number % 10]; while (number /= 10);
00386     if (sign < 0) *tmp++ = '-';
00387     freverse(buf, tmp - 1);
00388     return tmp - buf;
00389 }
00390 
00391 static void fbuffer_append_long(FBuffer *fb, long number)
00392 {
00393     char buf[20];
00394     unsigned long len = fltoa(number, buf);
00395     fbuffer_append(fb, buf, len);
00396 }
00397 
00398 static FBuffer *fbuffer_dup(FBuffer *fb)
00399 {
00400     unsigned long len = fb->len;
00401     FBuffer *result;
00402 
00403     if (len > 0) {
00404         result = fbuffer_alloc_with_length(len);
00405         fbuffer_append(result, FBUFFER_PAIR(fb));
00406     } else {
00407         result = fbuffer_alloc();
00408     }
00409     return result;
00410 }
00411 
00412 /*
00413  * Document-module: JSON::Ext::Generator
00414  *
00415  * This is the JSON generator implemented as a C extension. It can be
00416  * configured to be used by setting
00417  *
00418  *  JSON.generator = JSON::Ext::Generator
00419  *
00420  * with the method generator= in JSON.
00421  *
00422  */
00423 
00424 /*
00425  * call-seq: to_json(state = nil)
00426  *
00427  * Returns a JSON string containing a JSON object, that is generated from
00428  * this Hash instance.
00429  * _state_ is a JSON::State object, that can also be used to configure the
00430  * produced JSON string output further.
00431  */
00432 static VALUE mHash_to_json(int argc, VALUE *argv, VALUE self)
00433 {
00434     GENERATE_JSON(object);
00435 }
00436 
00437 /*
00438  * call-seq: to_json(state = nil)
00439  *
00440  * Returns a JSON string containing a JSON array, that is generated from
00441  * this Array instance.
00442  * _state_ is a JSON::State object, that can also be used to configure the
00443  * produced JSON string output further.
00444  */
00445 static VALUE mArray_to_json(int argc, VALUE *argv, VALUE self) {
00446     GENERATE_JSON(array);
00447 }
00448 
00449 /*
00450  * call-seq: to_json(*)
00451  *
00452  * Returns a JSON string representation for this Integer number.
00453  */
00454 static VALUE mFixnum_to_json(int argc, VALUE *argv, VALUE self)
00455 {
00456     GENERATE_JSON(fixnum);
00457 }
00458 
00459 /*
00460  * call-seq: to_json(*)
00461  *
00462  * Returns a JSON string representation for this Integer number.
00463  */
00464 static VALUE mBignum_to_json(int argc, VALUE *argv, VALUE self)
00465 {
00466     GENERATE_JSON(bignum);
00467 }
00468 
00469 /*
00470  * call-seq: to_json(*)
00471  *
00472  * Returns a JSON string representation for this Float number.
00473  */
00474 static VALUE mFloat_to_json(int argc, VALUE *argv, VALUE self)
00475 {
00476     GENERATE_JSON(float);
00477 }
00478 
00479 /*
00480  * call-seq: String.included(modul)
00481  *
00482  * Extends _modul_ with the String::Extend module.
00483  */
00484 static VALUE mString_included_s(VALUE self, VALUE modul) {
00485     VALUE result = rb_funcall(modul, i_extend, 1, mString_Extend);
00486     return result;
00487 }
00488 
00489 /*
00490  * call-seq: to_json(*)
00491  *
00492  * This string should be encoded with UTF-8 A call to this method
00493  * returns a JSON string encoded with UTF16 big endian characters as
00494  * \u????.
00495  */
00496 static VALUE mString_to_json(int argc, VALUE *argv, VALUE self)
00497 {
00498     GENERATE_JSON(string);
00499 }
00500 
00501 /*
00502  * call-seq: to_json_raw_object()
00503  *
00504  * This method creates a raw object hash, that can be nested into
00505  * other data structures and will be generated as a raw string. This
00506  * method should be used, if you want to convert raw strings to JSON
00507  * instead of UTF-8 strings, e. g. binary data.
00508  */
00509 static VALUE mString_to_json_raw_object(VALUE self)
00510 {
00511     VALUE ary;
00512     VALUE result = rb_hash_new();
00513     rb_hash_aset(result, rb_funcall(mJSON, i_create_id, 0), rb_class_name(rb_obj_class(self)));
00514     ary = rb_funcall(self, i_unpack, 1, rb_str_new2("C*"));
00515     rb_hash_aset(result, rb_str_new2("raw"), ary);
00516     return result;
00517 }
00518 
00519 /*
00520  * call-seq: to_json_raw(*args)
00521  *
00522  * This method creates a JSON text from the result of a call to
00523  * to_json_raw_object of this String.
00524  */
00525 static VALUE mString_to_json_raw(int argc, VALUE *argv, VALUE self)
00526 {
00527     VALUE obj = mString_to_json_raw_object(self);
00528     Check_Type(obj, T_HASH);
00529     return mHash_to_json(argc, argv, obj);
00530 }
00531 
00532 /*
00533  * call-seq: json_create(o)
00534  *
00535  * Raw Strings are JSON Objects (the raw bytes are stored in an array for the
00536  * key "raw"). The Ruby String can be created by this module method.
00537  */
00538 static VALUE mString_Extend_json_create(VALUE self, VALUE o)
00539 {
00540     VALUE ary;
00541     Check_Type(o, T_HASH);
00542     ary = rb_hash_aref(o, rb_str_new2("raw"));
00543     return rb_funcall(ary, i_pack, 1, rb_str_new2("C*"));
00544 }
00545 
00546 /*
00547  * call-seq: to_json(*)
00548  *
00549  * Returns a JSON string for true: 'true'.
00550  */
00551 static VALUE mTrueClass_to_json(int argc, VALUE *argv, VALUE self)
00552 {
00553     GENERATE_JSON(true);
00554 }
00555 
00556 /*
00557  * call-seq: to_json(*)
00558  *
00559  * Returns a JSON string for false: 'false'.
00560  */
00561 static VALUE mFalseClass_to_json(int argc, VALUE *argv, VALUE self)
00562 {
00563     GENERATE_JSON(false);
00564 }
00565 
00566 /*
00567  * call-seq: to_json(*)
00568  *
00569  * Returns a JSON string for nil: 'null'.
00570  */
00571 static VALUE mNilClass_to_json(int argc, VALUE *argv, VALUE self)
00572 {
00573     GENERATE_JSON(null);
00574 }
00575 
00576 /*
00577  * call-seq: to_json(*)
00578  *
00579  * Converts this object to a string (calling #to_s), converts
00580  * it to a JSON string, and returns the result. This is a fallback, if no
00581  * special method #to_json was defined for some object.
00582  */
00583 static VALUE mObject_to_json(int argc, VALUE *argv, VALUE self)
00584 {
00585     VALUE state;
00586     VALUE string = rb_funcall(self, i_to_s, 0);
00587     rb_scan_args(argc, argv, "01", &state);
00588     Check_Type(string, T_STRING);
00589     state = cState_from_state_s(cState, state);
00590     return cState_partial_generate(state, string);
00591 }
00592 
00593 static void State_free(JSON_Generator_State *state)
00594 {
00595     if (state->indent) ruby_xfree(state->indent);
00596     if (state->space) ruby_xfree(state->space);
00597     if (state->space_before) ruby_xfree(state->space_before);
00598     if (state->object_nl) ruby_xfree(state->object_nl);
00599     if (state->array_nl) ruby_xfree(state->array_nl);
00600     if (state->array_delim) fbuffer_free(state->array_delim);
00601     if (state->object_delim) fbuffer_free(state->object_delim);
00602     if (state->object_delim2) fbuffer_free(state->object_delim2);
00603     ruby_xfree(state);
00604 }
00605 
00606 static JSON_Generator_State *State_allocate()
00607 {
00608     JSON_Generator_State *state = ALLOC(JSON_Generator_State);
00609     MEMZERO(state, JSON_Generator_State, 1);
00610     return state;
00611 }
00612 
00613 static VALUE cState_s_allocate(VALUE klass)
00614 {
00615     JSON_Generator_State *state = State_allocate();
00616     return Data_Wrap_Struct(klass, NULL, State_free, state);
00617 }
00618 
00619 /*
00620  * call-seq: configure(opts)
00621  *
00622  * Configure this State instance with the Hash _opts_, and return
00623  * itself.
00624  */
00625 static VALUE cState_configure(VALUE self, VALUE opts)
00626 {
00627     VALUE tmp;
00628     GET_STATE(self);
00629     tmp = rb_convert_type(opts, T_HASH, "Hash", "to_hash");
00630     if (NIL_P(tmp)) tmp = rb_convert_type(opts, T_HASH, "Hash", "to_h");
00631     if (NIL_P(tmp)) {
00632         rb_raise(rb_eArgError, "opts has to be hash like or convertable into a hash");
00633     }
00634     opts = tmp;
00635     tmp = rb_hash_aref(opts, ID2SYM(i_indent));
00636     if (RTEST(tmp)) {
00637         unsigned long len;
00638         Check_Type(tmp, T_STRING);
00639         len = RSTRING_LEN(tmp);
00640         state->indent = fstrndup(RSTRING_PTR(tmp), len);
00641         state->indent_len = len;
00642     }
00643     tmp = rb_hash_aref(opts, ID2SYM(i_space));
00644     if (RTEST(tmp)) {
00645         unsigned long len;
00646         Check_Type(tmp, T_STRING);
00647         len = RSTRING_LEN(tmp);
00648         state->space = fstrndup(RSTRING_PTR(tmp), len);
00649         state->space_len = len;
00650     }
00651     tmp = rb_hash_aref(opts, ID2SYM(i_space_before));
00652     if (RTEST(tmp)) {
00653         unsigned long len;
00654         Check_Type(tmp, T_STRING);
00655         len = RSTRING_LEN(tmp);
00656         state->space_before = fstrndup(RSTRING_PTR(tmp), len);
00657         state->space_before_len = len;
00658     }
00659     tmp = rb_hash_aref(opts, ID2SYM(i_array_nl));
00660     if (RTEST(tmp)) {
00661         unsigned long len;
00662         Check_Type(tmp, T_STRING);
00663         len = RSTRING_LEN(tmp);
00664         state->array_nl = fstrndup(RSTRING_PTR(tmp), len);
00665         state->array_nl_len = len;
00666     }
00667     tmp = rb_hash_aref(opts, ID2SYM(i_object_nl));
00668     if (RTEST(tmp)) {
00669         unsigned long len;
00670         Check_Type(tmp, T_STRING);
00671         len = RSTRING_LEN(tmp);
00672         state->object_nl = fstrndup(RSTRING_PTR(tmp), len);
00673         state->object_nl_len = len;
00674     }
00675     tmp = ID2SYM(i_max_nesting);
00676     state->max_nesting = 19;
00677     if (option_given_p(opts, tmp)) {
00678         VALUE max_nesting = rb_hash_aref(opts, tmp);
00679         if (RTEST(max_nesting)) {
00680             Check_Type(max_nesting, T_FIXNUM);
00681             state->max_nesting = FIX2LONG(max_nesting);
00682         } else {
00683             state->max_nesting = 0;
00684         }
00685     }
00686     tmp = ID2SYM(i_depth);
00687     state->depth = 0;
00688     if (option_given_p(opts, tmp)) {
00689         VALUE depth = rb_hash_aref(opts, tmp);
00690         if (RTEST(depth)) {
00691             Check_Type(depth, T_FIXNUM);
00692             state->depth = FIX2LONG(depth);
00693         } else {
00694             state->depth = 0;
00695         }
00696     }
00697     tmp = rb_hash_aref(opts, ID2SYM(i_allow_nan));
00698     state->allow_nan = RTEST(tmp);
00699     tmp = rb_hash_aref(opts, ID2SYM(i_ascii_only));
00700     state->ascii_only = RTEST(tmp);
00701     tmp = rb_hash_aref(opts, ID2SYM(i_quirks_mode));
00702     state->quirks_mode = RTEST(tmp);
00703     return self;
00704 }
00705 
00706 /*
00707  * call-seq: to_h
00708  *
00709  * Returns the configuration instance variables as a hash, that can be
00710  * passed to the configure method.
00711  */
00712 static VALUE cState_to_h(VALUE self)
00713 {
00714     VALUE result = rb_hash_new();
00715     GET_STATE(self);
00716     rb_hash_aset(result, ID2SYM(i_indent), rb_str_new(state->indent, state->indent_len));
00717     rb_hash_aset(result, ID2SYM(i_space), rb_str_new(state->space, state->space_len));
00718     rb_hash_aset(result, ID2SYM(i_space_before), rb_str_new(state->space_before, state->space_before_len));
00719     rb_hash_aset(result, ID2SYM(i_object_nl), rb_str_new(state->object_nl, state->object_nl_len));
00720     rb_hash_aset(result, ID2SYM(i_array_nl), rb_str_new(state->array_nl, state->array_nl_len));
00721     rb_hash_aset(result, ID2SYM(i_allow_nan), state->allow_nan ? Qtrue : Qfalse);
00722     rb_hash_aset(result, ID2SYM(i_ascii_only), state->ascii_only ? Qtrue : Qfalse);
00723     rb_hash_aset(result, ID2SYM(i_quirks_mode), state->quirks_mode ? Qtrue : Qfalse);
00724     rb_hash_aset(result, ID2SYM(i_max_nesting), LONG2FIX(state->max_nesting));
00725     rb_hash_aset(result, ID2SYM(i_depth), LONG2FIX(state->depth));
00726     return result;
00727 }
00728 
00729 /*
00730 * call-seq: [](name)
00731 *
00732 * Return the value returned by method +name+.
00733 */
00734 static VALUE cState_aref(VALUE self, VALUE name)
00735 {
00736     GET_STATE(self);
00737     if (RTEST(rb_funcall(self, i_respond_to_p, 1, name))) {
00738         return rb_funcall(self, i_send, 1, name);
00739     } else {
00740         return Qnil;
00741     }
00742 }
00743 
00744 static void generate_json_object(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00745 {
00746     char *object_nl = state->object_nl;
00747     long object_nl_len = state->object_nl_len;
00748     char *indent = state->indent;
00749     long indent_len = state->indent_len;
00750     long max_nesting = state->max_nesting;
00751     char *delim = FBUFFER_PTR(state->object_delim);
00752     long delim_len = FBUFFER_LEN(state->object_delim);
00753     char *delim2 = FBUFFER_PTR(state->object_delim2);
00754     long delim2_len = FBUFFER_LEN(state->object_delim2);
00755     long depth = ++state->depth;
00756     int i, j;
00757     VALUE key, key_to_s, keys;
00758     if (max_nesting != 0 && depth > max_nesting) {
00759         fbuffer_free(buffer);
00760         rb_raise(eNestingError, "nesting of %ld is too deep", --state->depth);
00761     }
00762     fbuffer_append_char(buffer, '{');
00763     keys = rb_funcall(obj, i_keys, 0);
00764     for(i = 0; i < RARRAY_LEN(keys); i++) {
00765         if (i > 0) fbuffer_append(buffer, delim, delim_len);
00766         if (object_nl) {
00767             fbuffer_append(buffer, object_nl, object_nl_len);
00768         }
00769         if (indent) {
00770             for (j = 0; j < depth; j++) {
00771                 fbuffer_append(buffer, indent, indent_len);
00772             }
00773         }
00774         key = rb_ary_entry(keys, i);
00775         key_to_s = rb_funcall(key, i_to_s, 0);
00776         Check_Type(key_to_s, T_STRING);
00777         generate_json(buffer, Vstate, state, key_to_s);
00778         fbuffer_append(buffer, delim2, delim2_len);
00779         generate_json(buffer, Vstate, state, rb_hash_aref(obj, key));
00780     }
00781     depth = --state->depth;
00782     if (object_nl) {
00783         fbuffer_append(buffer, object_nl, object_nl_len);
00784         if (indent) {
00785             for (j = 0; j < depth; j++) {
00786                 fbuffer_append(buffer, indent, indent_len);
00787             }
00788         }
00789     }
00790     fbuffer_append_char(buffer, '}');
00791 }
00792 
00793 static void generate_json_array(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00794 {
00795     char *array_nl = state->array_nl;
00796     long array_nl_len = state->array_nl_len;
00797     char *indent = state->indent;
00798     long indent_len = state->indent_len;
00799     long max_nesting = state->max_nesting;
00800     char *delim = FBUFFER_PTR(state->array_delim);
00801     long delim_len = FBUFFER_LEN(state->array_delim);
00802     long depth = ++state->depth;
00803     int i, j;
00804     if (max_nesting != 0 && depth > max_nesting) {
00805         fbuffer_free(buffer);
00806         rb_raise(eNestingError, "nesting of %ld is too deep", --state->depth);
00807     }
00808     fbuffer_append_char(buffer, '[');
00809     if (array_nl) fbuffer_append(buffer, array_nl, array_nl_len);
00810     for(i = 0; i < RARRAY_LEN(obj); i++) {
00811         if (i > 0) fbuffer_append(buffer, delim, delim_len);
00812         if (indent) {
00813             for (j = 0; j < depth; j++) {
00814                 fbuffer_append(buffer, indent, indent_len);
00815             }
00816         }
00817         generate_json(buffer, Vstate, state, rb_ary_entry(obj, i));
00818     }
00819     state->depth = --depth;
00820     if (array_nl) {
00821         fbuffer_append(buffer, array_nl, array_nl_len);
00822         if (indent) {
00823             for (j = 0; j < depth; j++) {
00824                 fbuffer_append(buffer, indent, indent_len);
00825             }
00826         }
00827     }
00828     fbuffer_append_char(buffer, ']');
00829 }
00830 
00831 static void generate_json_string(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00832 {
00833     fbuffer_append_char(buffer, '"');
00834 #ifdef HAVE_RUBY_ENCODING_H
00835     obj = rb_funcall(obj, i_encode, 1, CEncoding_UTF_8);
00836 #endif
00837     if (state->ascii_only) {
00838         convert_UTF8_to_JSON_ASCII(buffer, obj);
00839     } else {
00840         convert_UTF8_to_JSON(buffer, obj);
00841     }
00842     fbuffer_append_char(buffer, '"');
00843 }
00844 
00845 static void generate_json_null(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00846 {
00847     fbuffer_append(buffer, "null", 4);
00848 }
00849 
00850 static void generate_json_false(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00851 {
00852     fbuffer_append(buffer, "false", 5);
00853 }
00854 
00855 static void generate_json_true(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00856 {
00857     fbuffer_append(buffer, "true", 4);
00858 }
00859 
00860 static void generate_json_fixnum(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00861 {
00862     fbuffer_append_long(buffer, FIX2LONG(obj));
00863 }
00864 
00865 static void generate_json_bignum(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00866 {
00867     VALUE tmp = rb_funcall(obj, i_to_s, 0);
00868     fbuffer_append_str(buffer, tmp);
00869 }
00870 
00871 static void generate_json_float(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00872 {
00873     double value = RFLOAT_VALUE(obj);
00874     char allow_nan = state->allow_nan;
00875     VALUE tmp = rb_funcall(obj, i_to_s, 0);
00876     if (!allow_nan) {
00877         if (isinf(value)) {
00878             fbuffer_free(buffer);
00879             rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp));
00880         } else if (isnan(value)) {
00881             fbuffer_free(buffer);
00882             rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp));
00883         }
00884     }
00885     fbuffer_append_str(buffer, tmp);
00886 }
00887 
00888 static void generate_json(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj)
00889 {
00890     VALUE tmp;
00891     VALUE klass = CLASS_OF(obj);
00892     if (klass == rb_cHash) {
00893         generate_json_object(buffer, Vstate, state, obj);
00894     } else if (klass == rb_cArray) {
00895         generate_json_array(buffer, Vstate, state, obj);
00896     } else if (klass == rb_cString) {
00897         generate_json_string(buffer, Vstate, state, obj);
00898     } else if (obj == Qnil) {
00899         generate_json_null(buffer, Vstate, state, obj);
00900     } else if (obj == Qfalse) {
00901         generate_json_false(buffer, Vstate, state, obj);
00902     } else if (obj == Qtrue) {
00903         generate_json_true(buffer, Vstate, state, obj);
00904     } else if (klass == rb_cFixnum) {
00905         generate_json_fixnum(buffer, Vstate, state, obj);
00906     } else if (klass == rb_cBignum) {
00907         generate_json_bignum(buffer, Vstate, state, obj);
00908     } else if (klass == rb_cFloat) {
00909         generate_json_float(buffer, Vstate, state, obj);
00910     } else if (rb_respond_to(obj, i_to_json)) {
00911         tmp = rb_funcall(obj, i_to_json, 1, Vstate);
00912         Check_Type(tmp, T_STRING);
00913         fbuffer_append_str(buffer, tmp);
00914     } else {
00915         tmp = rb_funcall(obj, i_to_s, 0);
00916         Check_Type(tmp, T_STRING);
00917         generate_json(buffer, Vstate, state, tmp);
00918     }
00919 }
00920 
00921 static FBuffer *cState_prepare_buffer(VALUE self)
00922 {
00923     FBuffer *buffer = fbuffer_alloc();
00924     GET_STATE(self);
00925 
00926     if (state->object_delim) {
00927         fbuffer_clear(state->object_delim);
00928     } else {
00929         state->object_delim = fbuffer_alloc_with_length(16);
00930     }
00931     fbuffer_append_char(state->object_delim, ',');
00932     if (state->object_delim2) {
00933         fbuffer_clear(state->object_delim2);
00934     } else {
00935         state->object_delim2 = fbuffer_alloc_with_length(16);
00936     }
00937     fbuffer_append_char(state->object_delim2, ':');
00938     if (state->space) fbuffer_append(state->object_delim2, state->space, state->space_len);
00939 
00940     if (state->array_delim) {
00941         fbuffer_clear(state->array_delim);
00942     } else {
00943         state->array_delim = fbuffer_alloc_with_length(16);
00944     }
00945     fbuffer_append_char(state->array_delim, ',');
00946     if (state->array_nl) fbuffer_append(state->array_delim, state->array_nl, state->array_nl_len);
00947     return buffer;
00948 }
00949 
00950 static VALUE fbuffer_to_s(FBuffer *fb)
00951 {
00952     VALUE result = rb_str_new(FBUFFER_PAIR(fb));
00953     fbuffer_free(fb);
00954     FORCE_UTF8(result);
00955     return result;
00956 }
00957 
00958 static VALUE cState_partial_generate(VALUE self, VALUE obj)
00959 {
00960     FBuffer *buffer = cState_prepare_buffer(self);
00961     GET_STATE(self);
00962     generate_json(buffer, self, state, obj);
00963     return fbuffer_to_s(buffer);
00964 }
00965 
00966 /*
00967  * call-seq: generate(obj)
00968  *
00969  * Generates a valid JSON document from object +obj+ and returns the
00970  * result. If no valid JSON document can be created this method raises a
00971  * GeneratorError exception.
00972  */
00973 static VALUE cState_generate(VALUE self, VALUE obj)
00974 {
00975     VALUE result = cState_partial_generate(self, obj);
00976     VALUE re, args[2];
00977     GET_STATE(self);
00978     if (!state->quirks_mode) {
00979         args[0] = rb_str_new2("\\A\\s*(?:\\[.*\\]|\\{.*\\})\\s*\\Z");
00980         args[1] = CRegexp_MULTILINE;
00981         re = rb_class_new_instance(2, args, rb_cRegexp);
00982         if (NIL_P(rb_funcall(re, i_match, 1, result))) {
00983             rb_raise(eGeneratorError, "only generation of JSON objects or arrays allowed");
00984         }
00985     }
00986     return result;
00987 }
00988 
00989 /*
00990  * call-seq: new(opts = {})
00991  *
00992  * Instantiates a new State object, configured by _opts_.
00993  *
00994  * _opts_ can have the following keys:
00995  *
00996  * * *indent*: a string used to indent levels (default: ''),
00997  * * *space*: a string that is put after, a : or , delimiter (default: ''),
00998  * * *space_before*: a string that is put before a : pair delimiter (default: ''),
00999  * * *object_nl*: a string that is put at the end of a JSON object (default: ''),
01000  * * *array_nl*: a string that is put at the end of a JSON array (default: ''),
01001  * * *allow_nan*: true if NaN, Infinity, and -Infinity should be
01002  *   generated, otherwise an exception is thrown, if these values are
01003  *   encountered. This options defaults to false.
01004  * * *quirks_mode*: Enables quirks_mode for parser, that is for example
01005  *   generating single JSON values instead of documents is possible.
01006  */
01007 static VALUE cState_initialize(int argc, VALUE *argv, VALUE self)
01008 {
01009     VALUE opts;
01010     GET_STATE(self);
01011     state->max_nesting = 19;
01012     rb_scan_args(argc, argv, "01", &opts);
01013     if (!NIL_P(opts)) cState_configure(self, opts);
01014     return self;
01015 }
01016 
01017 /*
01018  * call-seq: initialize_copy(orig)
01019  *
01020  * Initializes this object from orig if it to be duplicated/cloned and returns
01021  * it.
01022 */
01023 static VALUE cState_init_copy(VALUE obj, VALUE orig)
01024 {
01025     JSON_Generator_State *objState, *origState;
01026 
01027     Data_Get_Struct(obj, JSON_Generator_State, objState);
01028     Data_Get_Struct(orig, JSON_Generator_State, origState);
01029     if (!objState) rb_raise(rb_eArgError, "unallocated JSON::State");
01030 
01031     MEMCPY(objState, origState, JSON_Generator_State, 1);
01032     objState->indent = fstrndup(origState->indent, origState->indent_len);
01033     objState->space = fstrndup(origState->space, origState->space_len);
01034     objState->space_before = fstrndup(origState->space_before, origState->space_before_len);
01035     objState->object_nl = fstrndup(origState->object_nl, origState->object_nl_len);
01036     objState->array_nl = fstrndup(origState->array_nl, origState->array_nl_len);
01037     if (origState->array_delim) objState->array_delim = fbuffer_dup(origState->array_delim);
01038     if (origState->object_delim) objState->object_delim = fbuffer_dup(origState->object_delim);
01039     if (origState->object_delim2) objState->object_delim2 = fbuffer_dup(origState->object_delim2);
01040     return obj;
01041 }
01042 
01043 /*
01044  * call-seq: from_state(opts)
01045  *
01046  * Creates a State object from _opts_, which ought to be Hash to create a
01047  * new State instance configured by _opts_, something else to create an
01048  * unconfigured instance. If _opts_ is a State object, it is just returned.
01049  */
01050 static VALUE cState_from_state_s(VALUE self, VALUE opts)
01051 {
01052     if (rb_obj_is_kind_of(opts, self)) {
01053         return opts;
01054     } else if (rb_obj_is_kind_of(opts, rb_cHash)) {
01055         return rb_funcall(self, i_new, 1, opts);
01056     } else {
01057         if (NIL_P(CJSON_SAFE_STATE_PROTOTYPE)) {
01058             CJSON_SAFE_STATE_PROTOTYPE = rb_const_get(mJSON, i_SAFE_STATE_PROTOTYPE);
01059         }
01060         return rb_funcall(CJSON_SAFE_STATE_PROTOTYPE, i_dup, 0);
01061     }
01062 }
01063 
01064 /*
01065  * call-seq: indent()
01066  *
01067  * This string is used to indent levels in the JSON text.
01068  */
01069 static VALUE cState_indent(VALUE self)
01070 {
01071     GET_STATE(self);
01072     return state->indent ? rb_str_new2(state->indent) : rb_str_new2("");
01073 }
01074 
01075 /*
01076  * call-seq: indent=(indent)
01077  *
01078  * This string is used to indent levels in the JSON text.
01079  */
01080 static VALUE cState_indent_set(VALUE self, VALUE indent)
01081 {
01082     unsigned long len;
01083     GET_STATE(self);
01084     Check_Type(indent, T_STRING);
01085     len = RSTRING_LEN(indent);
01086     if (len == 0) {
01087         if (state->indent) {
01088             ruby_xfree(state->indent);
01089             state->indent = NULL;
01090             state->indent_len = 0;
01091         }
01092     } else {
01093         if (state->indent) ruby_xfree(state->indent);
01094         state->indent = strdup(RSTRING_PTR(indent));
01095         state->indent_len = len;
01096     }
01097     return Qnil;
01098 }
01099 
01100 /*
01101  * call-seq: space()
01102  *
01103  * This string is used to insert a space between the tokens in a JSON
01104  * string.
01105  */
01106 static VALUE cState_space(VALUE self)
01107 {
01108     GET_STATE(self);
01109     return state->space ? rb_str_new2(state->space) : rb_str_new2("");
01110 }
01111 
01112 /*
01113  * call-seq: space=(space)
01114  *
01115  * This string is used to insert a space between the tokens in a JSON
01116  * string.
01117  */
01118 static VALUE cState_space_set(VALUE self, VALUE space)
01119 {
01120     unsigned long len;
01121     GET_STATE(self);
01122     Check_Type(space, T_STRING);
01123     len = RSTRING_LEN(space);
01124     if (len == 0) {
01125         if (state->space) {
01126             ruby_xfree(state->space);
01127             state->space = NULL;
01128             state->space_len = 0;
01129         }
01130     } else {
01131         if (state->space) ruby_xfree(state->space);
01132         state->space = strdup(RSTRING_PTR(space));
01133         state->space_len = len;
01134     }
01135     return Qnil;
01136 }
01137 
01138 /*
01139  * call-seq: space_before()
01140  *
01141  * This string is used to insert a space before the ':' in JSON objects.
01142  */
01143 static VALUE cState_space_before(VALUE self)
01144 {
01145     GET_STATE(self);
01146     return state->space_before ? rb_str_new2(state->space_before) : rb_str_new2("");
01147 }
01148 
01149 /*
01150  * call-seq: space_before=(space_before)
01151  *
01152  * This string is used to insert a space before the ':' in JSON objects.
01153  */
01154 static VALUE cState_space_before_set(VALUE self, VALUE space_before)
01155 {
01156     unsigned long len;
01157     GET_STATE(self);
01158     Check_Type(space_before, T_STRING);
01159     len = RSTRING_LEN(space_before);
01160     if (len == 0) {
01161         if (state->space_before) {
01162             ruby_xfree(state->space_before);
01163             state->space_before = NULL;
01164             state->space_before_len = 0;
01165         }
01166     } else {
01167         if (state->space_before) ruby_xfree(state->space_before);
01168         state->space_before = strdup(RSTRING_PTR(space_before));
01169         state->space_before_len = len;
01170     }
01171     return Qnil;
01172 }
01173 
01174 /*
01175  * call-seq: object_nl()
01176  *
01177  * This string is put at the end of a line that holds a JSON object (or
01178  * Hash).
01179  */
01180 static VALUE cState_object_nl(VALUE self)
01181 {
01182     GET_STATE(self);
01183     return state->object_nl ? rb_str_new2(state->object_nl) : rb_str_new2("");
01184 }
01185 
01186 /*
01187  * call-seq: object_nl=(object_nl)
01188  *
01189  * This string is put at the end of a line that holds a JSON object (or
01190  * Hash).
01191  */
01192 static VALUE cState_object_nl_set(VALUE self, VALUE object_nl)
01193 {
01194     unsigned long len;
01195     GET_STATE(self);
01196     Check_Type(object_nl, T_STRING);
01197     len = RSTRING_LEN(object_nl);
01198     if (len == 0) {
01199         if (state->object_nl) {
01200             ruby_xfree(state->object_nl);
01201             state->object_nl = NULL;
01202         }
01203     } else {
01204         if (state->object_nl) ruby_xfree(state->object_nl);
01205         state->object_nl = strdup(RSTRING_PTR(object_nl));
01206         state->object_nl_len = len;
01207     }
01208     return Qnil;
01209 }
01210 
01211 /*
01212  * call-seq: array_nl()
01213  *
01214  * This string is put at the end of a line that holds a JSON array.
01215  */
01216 static VALUE cState_array_nl(VALUE self)
01217 {
01218     GET_STATE(self);
01219     return state->array_nl ? rb_str_new2(state->array_nl) : rb_str_new2("");
01220 }
01221 
01222 /*
01223  * call-seq: array_nl=(array_nl)
01224  *
01225  * This string is put at the end of a line that holds a JSON array.
01226  */
01227 static VALUE cState_array_nl_set(VALUE self, VALUE array_nl)
01228 {
01229     unsigned long len;
01230     GET_STATE(self);
01231     Check_Type(array_nl, T_STRING);
01232     len = RSTRING_LEN(array_nl);
01233     if (len == 0) {
01234         if (state->array_nl) {
01235             ruby_xfree(state->array_nl);
01236             state->array_nl = NULL;
01237         }
01238     } else {
01239         if (state->array_nl) ruby_xfree(state->array_nl);
01240         state->array_nl = strdup(RSTRING_PTR(array_nl));
01241         state->array_nl_len = len;
01242     }
01243     return Qnil;
01244 }
01245 
01246 
01247 /*
01248 * call-seq: check_circular?
01249 *
01250 * Returns true, if circular data structures should be checked,
01251 * otherwise returns false.
01252 */
01253 static VALUE cState_check_circular_p(VALUE self)
01254 {
01255     GET_STATE(self);
01256     return state->max_nesting ? Qtrue : Qfalse;
01257 }
01258 
01259 /*
01260  * call-seq: max_nesting
01261  *
01262  * This integer returns the maximum level of data structure nesting in
01263  * the generated JSON, max_nesting = 0 if no maximum is checked.
01264  */
01265 static VALUE cState_max_nesting(VALUE self)
01266 {
01267     GET_STATE(self);
01268     return LONG2FIX(state->max_nesting);
01269 }
01270 
01271 /*
01272  * call-seq: max_nesting=(depth)
01273  *
01274  * This sets the maximum level of data structure nesting in the generated JSON
01275  * to the integer depth, max_nesting = 0 if no maximum should be checked.
01276  */
01277 static VALUE cState_max_nesting_set(VALUE self, VALUE depth)
01278 {
01279     GET_STATE(self);
01280     Check_Type(depth, T_FIXNUM);
01281     return state->max_nesting = FIX2LONG(depth);
01282 }
01283 
01284 /*
01285  * call-seq: allow_nan?
01286  *
01287  * Returns true, if NaN, Infinity, and -Infinity should be generated, otherwise
01288  * returns false.
01289  */
01290 static VALUE cState_allow_nan_p(VALUE self)
01291 {
01292     GET_STATE(self);
01293     return state->allow_nan ? Qtrue : Qfalse;
01294 }
01295 
01296 /*
01297  * call-seq: ascii_only?
01298  *
01299  * Returns true, if NaN, Infinity, and -Infinity should be generated, otherwise
01300  * returns false.
01301  */
01302 static VALUE cState_ascii_only_p(VALUE self)
01303 {
01304     GET_STATE(self);
01305     return state->ascii_only ? Qtrue : Qfalse;
01306 }
01307 
01308 /*
01309  * call-seq: quirks_mode?
01310  *
01311  * Returns true, if quirks mode is enabled. Otherwise returns false.
01312  */
01313 static VALUE cState_quirks_mode_p(VALUE self)
01314 {
01315     GET_STATE(self);
01316     return state->quirks_mode ? Qtrue : Qfalse;
01317 }
01318 
01319 /*
01320  * call-seq: quirks_mode=(enable)
01321  *
01322  * If set to true, enables the quirks_mode mode.
01323  */
01324 static VALUE cState_quirks_mode_set(VALUE self, VALUE enable)
01325 {
01326     GET_STATE(self);
01327     state->quirks_mode = RTEST(enable);
01328     return Qnil;
01329 }
01330 
01331 /*
01332  * call-seq: depth
01333  *
01334  * This integer returns the current depth of data structure nesting.
01335  */
01336 static VALUE cState_depth(VALUE self)
01337 {
01338     GET_STATE(self);
01339     return LONG2FIX(state->depth);
01340 }
01341 
01342 /*
01343  * call-seq: depth=(depth)
01344  *
01345  * This sets the maximum level of data structure nesting in the generated JSON
01346  * to the integer depth, max_nesting = 0 if no maximum should be checked.
01347  */
01348 static VALUE cState_depth_set(VALUE self, VALUE depth)
01349 {
01350     GET_STATE(self);
01351     Check_Type(depth, T_FIXNUM);
01352     return state->depth = FIX2LONG(depth);
01353 }
01354 
01355 /*
01356  *
01357  */
01358 void Init_generator()
01359 {
01360     rb_require("json/common");
01361 
01362     mJSON = rb_define_module("JSON");
01363     mExt = rb_define_module_under(mJSON, "Ext");
01364     mGenerator = rb_define_module_under(mExt, "Generator");
01365 
01366     eGeneratorError = rb_path2class("JSON::GeneratorError");
01367     eNestingError = rb_path2class("JSON::NestingError");
01368 
01369     cState = rb_define_class_under(mGenerator, "State", rb_cObject);
01370     rb_define_alloc_func(cState, cState_s_allocate);
01371     rb_define_singleton_method(cState, "from_state", cState_from_state_s, 1);
01372     rb_define_method(cState, "initialize", cState_initialize, -1);
01373     rb_define_method(cState, "initialize_copy", cState_init_copy, 1);
01374     rb_define_method(cState, "indent", cState_indent, 0);
01375     rb_define_method(cState, "indent=", cState_indent_set, 1);
01376     rb_define_method(cState, "space", cState_space, 0);
01377     rb_define_method(cState, "space=", cState_space_set, 1);
01378     rb_define_method(cState, "space_before", cState_space_before, 0);
01379     rb_define_method(cState, "space_before=", cState_space_before_set, 1);
01380     rb_define_method(cState, "object_nl", cState_object_nl, 0);
01381     rb_define_method(cState, "object_nl=", cState_object_nl_set, 1);
01382     rb_define_method(cState, "array_nl", cState_array_nl, 0);
01383     rb_define_method(cState, "array_nl=", cState_array_nl_set, 1);
01384     rb_define_method(cState, "max_nesting", cState_max_nesting, 0);
01385     rb_define_method(cState, "max_nesting=", cState_max_nesting_set, 1);
01386     rb_define_method(cState, "check_circular?", cState_check_circular_p, 0);
01387     rb_define_method(cState, "allow_nan?", cState_allow_nan_p, 0);
01388     rb_define_method(cState, "ascii_only?", cState_ascii_only_p, 0);
01389     rb_define_method(cState, "quirks_mode?", cState_quirks_mode_p, 0);
01390     rb_define_method(cState, "quirks_mode", cState_quirks_mode_p, 0);
01391     rb_define_method(cState, "quirks_mode=", cState_quirks_mode_set, 1);
01392     rb_define_method(cState, "depth", cState_depth, 0);
01393     rb_define_method(cState, "depth=", cState_depth_set, 1);
01394     rb_define_method(cState, "configure", cState_configure, 1);
01395     rb_define_alias(cState, "merge", "configure");
01396     rb_define_method(cState, "to_h", cState_to_h, 0);
01397     rb_define_method(cState, "[]", cState_aref, 1);
01398     rb_define_method(cState, "generate", cState_generate, 1);
01399 
01400     mGeneratorMethods = rb_define_module_under(mGenerator, "GeneratorMethods");
01401     mObject = rb_define_module_under(mGeneratorMethods, "Object");
01402     rb_define_method(mObject, "to_json", mObject_to_json, -1);
01403     mHash = rb_define_module_under(mGeneratorMethods, "Hash");
01404     rb_define_method(mHash, "to_json", mHash_to_json, -1);
01405     mArray = rb_define_module_under(mGeneratorMethods, "Array");
01406     rb_define_method(mArray, "to_json", mArray_to_json, -1);
01407     mFixnum = rb_define_module_under(mGeneratorMethods, "Fixnum");
01408     rb_define_method(mFixnum, "to_json", mFixnum_to_json, -1);
01409     mBignum = rb_define_module_under(mGeneratorMethods, "Bignum");
01410     rb_define_method(mBignum, "to_json", mBignum_to_json, -1);
01411     mFloat = rb_define_module_under(mGeneratorMethods, "Float");
01412     rb_define_method(mFloat, "to_json", mFloat_to_json, -1);
01413     mString = rb_define_module_under(mGeneratorMethods, "String");
01414     rb_define_singleton_method(mString, "included", mString_included_s, 1);
01415     rb_define_method(mString, "to_json", mString_to_json, -1);
01416     rb_define_method(mString, "to_json_raw", mString_to_json_raw, -1);
01417     rb_define_method(mString, "to_json_raw_object", mString_to_json_raw_object, 0);
01418     mString_Extend = rb_define_module_under(mString, "Extend");
01419     rb_define_method(mString_Extend, "json_create", mString_Extend_json_create, 1);
01420     mTrueClass = rb_define_module_under(mGeneratorMethods, "TrueClass");
01421     rb_define_method(mTrueClass, "to_json", mTrueClass_to_json, -1);
01422     mFalseClass = rb_define_module_under(mGeneratorMethods, "FalseClass");
01423     rb_define_method(mFalseClass, "to_json", mFalseClass_to_json, -1);
01424     mNilClass = rb_define_module_under(mGeneratorMethods, "NilClass");
01425     rb_define_method(mNilClass, "to_json", mNilClass_to_json, -1);
01426 
01427     CRegexp_MULTILINE = rb_const_get(rb_cRegexp, rb_intern("MULTILINE"));
01428     i_to_s = rb_intern("to_s");
01429     i_to_json = rb_intern("to_json");
01430     i_new = rb_intern("new");
01431     i_indent = rb_intern("indent");
01432     i_space = rb_intern("space");
01433     i_space_before = rb_intern("space_before");
01434     i_object_nl = rb_intern("object_nl");
01435     i_array_nl = rb_intern("array_nl");
01436     i_max_nesting = rb_intern("max_nesting");
01437     i_allow_nan = rb_intern("allow_nan");
01438     i_ascii_only = rb_intern("ascii_only");
01439     i_quirks_mode = rb_intern("quirks_mode");
01440     i_depth = rb_intern("depth");
01441     i_pack = rb_intern("pack");
01442     i_unpack = rb_intern("unpack");
01443     i_create_id = rb_intern("create_id");
01444     i_extend = rb_intern("extend");
01445     i_key_p = rb_intern("key?");
01446     i_aref = rb_intern("[]");
01447     i_send = rb_intern("__send__");
01448     i_respond_to_p = rb_intern("respond_to?");
01449     i_match = rb_intern("match");
01450     i_keys = rb_intern("keys");
01451     i_dup = rb_intern("dup");
01452 #ifdef HAVE_RUBY_ENCODING_H
01453     CEncoding_UTF_8 = rb_funcall(rb_path2class("Encoding"), rb_intern("find"), 1, rb_str_new2("utf-8"));
01454     i_encoding = rb_intern("encoding");
01455     i_encode = rb_intern("encode");
01456 #endif
01457     i_SAFE_STATE_PROTOTYPE = rb_intern("SAFE_STATE_PROTOTYPE");
01458     CJSON_SAFE_STATE_PROTOTYPE = Qnil;
01459 }
01460