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# 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, mInteger, mFloat, mString, mString_Extend,
    00010              mTrueClass, mFalseClass, mNilClass, eGeneratorError,
    00011              eNestingError, CRegexp_MULTILINE, CJSON_SAFE_STATE_PROTOTYPE;
    00012
    00013 static ID i_to_s, i_to_json, i_new, i_indent, i_space, i_space_before,
    00014           i_object_nl, i_array_nl, i_max_nesting, i_allow_nan, i_ascii_only,
    00015           i_pack, i_unpack, i_create_id, i_extend, i_key_p, i_aref, i_send,
    00016           i_respond_to_p, i_match;
    00017
    00018 /*
    00019  * Copyright 2001-2004 Unicode, Inc.
    00020  *
    00021  * Disclaimer
    00022  *
    00023  * This source code is provided as is by Unicode, Inc. No claims are
    00024  * made as to fitness for any particular purpose. No warranties of any
    00025  * kind are expressed or implied. The recipient agrees to determine
    00026  * applicability of information provided. If this file has been
    00027  * purchased on magnetic or optical media from Unicode, Inc., the
    00028  * sole remedy for any claim will be exchange of defective media
    00029  * within 90 days of receipt.
    00030  *
    00031  * Limitations on Rights to Redistribute This Code
    00032  *
    00033  * Unicode, Inc. hereby grants the right to freely use the information
    00034  * supplied in this file in the creation of products supporting the
    00035  * Unicode Standard, and to make copies of this file in any form
    00036  * for internal or external distribution as long as this notice
    00037  * remains attached.
    00038  */
    00039
    00040 /*
    00041  * Index into the table below with the first byte of a UTF-8 sequence to
    00042  * get the number of trailing bytes that are supposed to follow it.
    00043  * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
    00044  * left as-is for anyone who may want to do such conversion, which was
    00045  * allowed in earlier algorithms.
    00046  */
    00047 static const char trailingBytesForUTF8[256] = {
    00048     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,
    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     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,
    00055     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
    00056 };
    00057
    00058 /*
    00059  * Magic values subtracted from a buffer value during UTF8 conversion.
    00060  * This table contains as many values as there might be trailing bytes
    00061  * in a UTF-8 sequence.
    00062  */
    00063 static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL,
    00064                      0x03C82080UL, 0xFA082080UL, 0x82082080UL };
    00065
    00066 /*
    00067  * Utility routine to tell whether a sequence of bytes is legal UTF-8.
    00068  * This must be called with the length pre-determined by the first byte.
    00069  * If not calling this from ConvertUTF8to*, then the length can be set by:
    00070  *  length = trailingBytesForUTF8[*source]+1;
    00071  * and the sequence is illegal right away if there aren't that many bytes
    00072  * available.
    00073  * If presented with a length > 4, this returns 0.  The Unicode
    00074  * definition of UTF-8 goes up to 4-byte sequences.
    00075  */
    00076 static unsigned char isLegalUTF8(const UTF8 *source, int length)
    00077 {
    00078     UTF8 a;
    00079     const UTF8 *srcptr = source+length;
    00080     switch (length) {
    00081         default: return 0;
    00082                  /* Everything else falls through when "1"... */
    00083         case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
    00084         case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0;
    00085         case 2: if ((a = (*--srcptr)) > 0xBF) return 0;
    00086
    00087                     switch (*source) {
    00088                         /* no fall-through in this inner switch */
    00089                         case 0xE0: if (a < 0xA0) return 0; break;
    00090                         case 0xED: if (a > 0x9F) return 0; break;
    00091                         case 0xF0: if (a < 0x90) return 0; break;
    00092                         case 0xF4: if (a > 0x8F) return 0; break;
    00093                         default:   if (a < 0x80) return 0;
    00094                     }
    00095
    00096         case 1: if (*source >= 0x80 && *source < 0xC2) return 0;
    00097     }
    00098     if (*source > 0xF4) return 0;
    00099     return 1;
    00100 }
    00101
    00102 /* Escapes the UTF16 character and stores the result in the buffer buf. */
    00103 static void unicode_escape(char *buf, UTF16 character)
    00104 {
    00105     const char *digits = "0123456789abcdef";
    00106
    00107     buf[2] = digits[character >> 12];
    00108     buf[3] = digits[(character >> 8) & 0xf];
    00109     buf[4] = digits[(character >> 4) & 0xf];
    00110     buf[5] = digits[character & 0xf];
    00111 }
    00112
    00113 /* Escapes the UTF16 character and stores the result in the buffer buf, then
    00114  * the buffer buf іs appended to the FBuffer buffer. */
    00115 static void unicode_escape_to_buffer(FBuffer *buffer, char buf[6], UTF16
    00116         character)
    00117 {
    00118     unicode_escape(buf, character);
    00119     fbuffer_append(buffer, buf, 6);
    00120 }
    00121
    00122 /* Converts string to a JSON string in FBuffer buffer, where all but the ASCII
    00123  * and control characters are JSON escaped. */
    00124 static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string)
    00125 {
    00126     const UTF8 *source = (UTF8 *) RSTRING_PTR(string);
    00127     const UTF8 *sourceEnd = source + RSTRING_LEN(string);
    00128     char buf[6] = { '\\', 'u' };
    00129
    00130     while (source < sourceEnd) {
    00131         UTF32 ch = 0;
    00132         unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
    00133         if (source + extraBytesToRead >= sourceEnd) {
    00134             rb_raise(rb_path2class("JSON::GeneratorError"),
    00135                     "partial character in source, but hit end");
    00136         }
    00137         if (!isLegalUTF8(source, extraBytesToRead+1)) {
    00138             rb_raise(rb_path2class("JSON::GeneratorError"),
    00139                     "source sequence is illegal/malformed utf-8");
    00140         }
    00141         /*
    00142          * The cases all fall through. See "Note A" below.
    00143          */
    00144         switch (extraBytesToRead) {
    00145             case 5: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
    00146             case 4: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
    00147             case 3: ch += *source++; ch <<= 6;
    00148             case 2: ch += *source++; ch <<= 6;
    00149             case 1: ch += *source++; ch <<= 6;
    00150             case 0: ch += *source++;
    00151         }
    00152         ch -= offsetsFromUTF8[extraBytesToRead];
    00153
    00154         if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
    00155             /* UTF-16 surrogate values are illegal in UTF-32 */
    00156             if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
    00157 #if UNI_STRICT_CONVERSION
    00158                 source -= (extraBytesToRead+1); /* return to the illegal value itself */
    00159                 rb_raise(rb_path2class("JSON::GeneratorError"),
    00160                         "source sequence is illegal/malformed utf-8");
    00161 #else
    00162                 unicode_escape_to_buffer(buffer, buf, UNI_REPLACEMENT_CHAR);
    00163 #endif
    00164             } else {
    00165                 /* normal case */
    00166                 if (ch >= 0x20 && ch <= 0x7f) {
    00167                     switch (ch) {
    00168                         case '\\':
    00169                             fbuffer_append(buffer, "\\\\", 2);
    00170                             break;
    00171                         case '"':
    00172                             fbuffer_append(buffer, "\\\"", 2);
    00173                             break;
    00174                         default:
    00175                             fbuffer_append_char(buffer, (char)ch);
    00176                             break;
    00177                     }
    00178                 } else {
    00179                     switch (ch) {
    00180                         case '\n':
    00181                             fbuffer_append(buffer, "\\n", 2);
    00182                             break;
    00183                         case '\r':
    00184                             fbuffer_append(buffer, "\\r", 2);
    00185                             break;
    00186                         case '\t':
    00187                             fbuffer_append(buffer, "\\t", 2);
    00188                             break;
    00189                         case '\f':
    00190                             fbuffer_append(buffer, "\\f", 2);
    00191                             break;
    00192                         case '\b':
    00193                             fbuffer_append(buffer, "\\b", 2);
    00194                             break;
    00195                         default:
    00196                             unicode_escape_to_buffer(buffer, buf, (UTF16) ch);
    00197                             break;
    00198                     }
    00199                 }
    00200             }
    00201         } else if (ch > UNI_MAX_UTF16) {
    00202 #if UNI_STRICT_CONVERSION
    00203             source -= (extraBytesToRead+1); /* return to the start */
    00204             rb_raise(rb_path2class("JSON::GeneratorError"),
    00205                     "source sequence is illegal/malformed utf8");
    00206 #else
    00207             unicode_escape_to_buffer(buffer, buf, UNI_REPLACEMENT_CHAR);
    00208 #endif
    00209         } else {
    00210             /* target is a character in range 0xFFFF - 0x10FFFF. */
    00211             ch -= halfBase;
    00212             unicode_escape_to_buffer(buffer, buf, (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START));
    00213             unicode_escape_to_buffer(buffer, buf, (UTF16)((ch & halfMask) + UNI_SUR_LOW_START));
    00214         }
    00215     }
    00216 }
    00217
    00218 /* Converts string to a JSON string in FBuffer buffer, where only the
    00219  * characters required by the JSON standard are JSON escaped. The remaining
    00220  * characters (should be UTF8) are just passed through and appended to the
    00221  * result. */
    00222 static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string)
    00223 {
    00224     const char *ptr = RSTRING_PTR(string), *p;
    00225     int len = RSTRING_LEN(string), start = 0, end = 0;
    00226     const char *escape = NULL;
    00227     int escape_len;
    00228     unsigned char c;
    00229     char buf[6] = { '\\', 'u' };
    00230
    00231     for (start = 0, end = 0; end < len;) {
    00232         p = ptr + end;
    00233         c = (unsigned char) *p;
    00234         if (c < 0x20) {
    00235             switch (c) {
    00236                 case '\n':
    00237                     escape = "\\n";
    00238                     escape_len = 2;
    00239                     break;
    00240                 case '\r':
    00241                     escape = "\\r";
    00242                     escape_len = 2;
    00243                     break;
    00244                 case '\t':
    00245                     escape = "\\t";
    00246                     escape_len = 2;
    00247                     break;
    00248                 case '\f':
    00249                     escape = "\\f";
    00250                     escape_len = 2;
    00251                     break;
    00252                 case '\b':
    00253                     escape = "\\b";
    00254                     escape_len = 2;
    00255                     break;
    00256                 default:
    00257                     unicode_escape(buf, (UTF16) *p);
    00258                     escape = buf;
    00259                     escape_len = 6;
    00260                     break;
    00261             }
    00262         } else {
    00263             switch (c) {
    00264                 case '\\':
    00265                     escape = "\\\\";
    00266                     escape_len = 2;
    00267                     break;
    00268                 case '"':
    00269                     escape =  "\\\"";
    00270                     escape_len = 2;
    00271                     break;
    00272                 default:
    00273                     end++;
    00274                     continue;
    00275                     break;
    00276             }
    00277         }
    00278         fbuffer_append(buffer, ptr + start, end - start);
    00279         fbuffer_append(buffer, escape, escape_len);
    00280         start = ++end;
    00281         escape = NULL;
    00282     }
    00283     fbuffer_append(buffer, ptr + start, end - start);
    00284 }
    00285
    00286 static char *fstrndup(const char *ptr, int len) {
    00287   char *result;
    00288   if (len <= 0) return NULL;
    00289   result = ALLOC_N(char, len);
    00290   memccpy(result, ptr, 0, len);
    00291   return result;
    00292 }
    00293
    00294 /* fbuffer implementation */
    00295
    00296 static FBuffer *fbuffer_alloc()
    00297 {
    00298     FBuffer *fb = ALLOC(FBuffer);
    00299     memset((void *) fb, 0, sizeof(FBuffer));
    00300     fb->initial_length = FBUFFER_INITIAL_LENGTH;
    00301     return fb;
    00302 }
    00303
    00304 static FBuffer *fbuffer_alloc_with_length(unsigned int initial_length)
    00305 {
    00306     FBuffer *fb;
    00307     assert(initial_length > 0);
    00308     fb = ALLOC(FBuffer);
    00309     memset((void *) fb, 0, sizeof(FBuffer));
    00310     fb->initial_length = initial_length;
    00311     return fb;
    00312 }
    00313
    00314 static void fbuffer_free(FBuffer *fb)
    00315 {
    00316     if (fb->ptr) ruby_xfree(fb->ptr);
    00317     ruby_xfree(fb);
    00318 }
    00319
    00320 static void fbuffer_free_only_buffer(FBuffer *fb)
    00321 {
    00322     ruby_xfree(fb);
    00323 }
    00324
    00325 static void fbuffer_clear(FBuffer *fb)
    00326 {
    00327     fb->len = 0;
    00328 }
    00329
    00330 static void fbuffer_inc_capa(FBuffer *fb, unsigned int requested)
    00331 {
    00332     unsigned int required;
    00333
    00334     if (!fb->ptr) {
    00335         fb->ptr = ALLOC_N(char, fb->initial_length);
    00336         fb->capa = fb->initial_length;
    00337     }
    00338
    00339     for (required = fb->capa; requested > required - fb->len; required <<= 1);
    00340
    00341     if (required > fb->capa) {
    00342         REALLOC_N(fb->ptr, char, required);
    00343         fb->capa = required;
    00344     }
    00345 }
    00346
    00347 static void fbuffer_append(FBuffer *fb, const char *newstr, unsigned int len)
    00348 {
    00349     if (len > 0) {
    00350         fbuffer_inc_capa(fb, len);
    00351         MEMCPY(fb->ptr + fb->len, newstr, char, len);
    00352         fb->len += len;
    00353     }
    00354 }
    00355
    00356 static void fbuffer_append_char(FBuffer *fb, char newchr)
    00357 {
    00358     fbuffer_inc_capa(fb, 1);
    00359     *(fb->ptr + fb->len) = newchr;
    00360     fb->len++;
    00361 }
    00362
    00363 static void freverse(char *start, char *end)
    00364 {
    00365     char c;
    00366
    00367     while (end > start) {
    00368         c = *end, *end-- = *start, *start++ = c;
    00369     }
    00370 }
    00371
    00372 static int fltoa(long number, char *buf)
    00373 {
    00374     static char digits[] = "0123456789";
    00375     long sign = number;
    00376     char* tmp = buf;
    00377
    00378     if (sign < 0) number = -number;
    00379     do *tmp++ = digits[number % 10]; while (number /= 10);
    00380     if (sign < 0) *tmp++ = '-';
    00381     freverse(buf, tmp - 1);
    00382     return tmp - buf;
    00383 }
    00384
    00385 static void fbuffer_append_long(FBuffer *fb, long number)
    00386 {
    00387     char buf[20];
    00388     int len = fltoa(number, buf);
    00389     fbuffer_append(fb, buf, len);
    00390 }
    00391
    00392 static FBuffer *fbuffer_dup(FBuffer *fb)
    00393 {
    00394     int len = fb->len;
    00395     FBuffer *result;
    00396
    00397     if (len > 0) {
    00398         result = fbuffer_alloc_with_length(len);
    00399         fbuffer_append(result, FBUFFER_PAIR(fb));
    00400     } else {
    00401         result = fbuffer_alloc();
    00402     }
    00403     return result;
    00404 }
    00405
    00406 /*
    00407  * Document-module: JSON::Ext::Generator
    00408  *
    00409  * This is the JSON generator implemented as a C extension. It can be
    00410  * configured to be used by setting
    00411  *
    00412  *  JSON.generator = JSON::Ext::Generator
    00413  *
    00414  * with the method generator= in JSON.
    00415  *
    00416  */
    00417
    00418 /*
    00419  * call-seq: to_json(state = nil, depth = 0)
    00420  *
    00421  * Returns a JSON string containing a JSON object, that is generated from
    00422  * this Hash instance.
    00423  * _state_ is a JSON::State object, that can also be used to configure the
    00424  * produced JSON string output further.
    00425  * _depth_ is used to find out nesting depth, to indent accordingly.
    00426  */
    00427 static VALUE mHash_to_json(int argc, VALUE *argv, VALUE self)
    00428 {
    00429     VALUE state, depth;
    00430
    00431     rb_scan_args(argc, argv, "02", &state, &depth);
    00432     state = cState_from_state_s(cState, state);
    00433     return cState_partial_generate(state, self, depth);
    00434 }
    00435
    00436 /*
    00437  * call-seq: to_json(state = nil, depth = 0)
    00438  *
    00439  * Returns a JSON string containing a JSON array, that is generated from
    00440  * this Array instance.
    00441  * _state_ is a JSON::State object, that can also be used to configure the
    00442  * produced JSON string output further.
    00443  * _depth_ is used to find out nesting depth, to indent accordingly.
    00444  */
    00445 static VALUE mArray_to_json(int argc, VALUE *argv, VALUE self) {
    00446     VALUE state, depth;
    00447     rb_scan_args(argc, argv, "02", &state, &depth);
    00448     state = cState_from_state_s(cState, state);
    00449     return cState_partial_generate(state, self, depth);
    00450 }
    00451
    00452 /*
    00453  * call-seq: to_json(*)
    00454  *
    00455  * Returns a JSON string representation for this Integer number.
    00456  */
    00457 static VALUE mInteger_to_json(int argc, VALUE *argv, VALUE self)
    00458 {
    00459     VALUE state, depth;
    00460     rb_scan_args(argc, argv, "02", &state, &depth);
    00461     state = cState_from_state_s(cState, state);
    00462     return cState_partial_generate(state, self, depth);
    00463 }
    00464
    00465 /*
    00466  * call-seq: to_json(*)
    00467  *
    00468  * Returns a JSON string representation for this Float number.
    00469  */
    00470 static VALUE mFloat_to_json(int argc, VALUE *argv, VALUE self)
    00471 {
    00472     VALUE state, depth;
    00473     rb_scan_args(argc, argv, "02", &state, &depth);
    00474     state = cState_from_state_s(cState, state);
    00475     return cState_partial_generate(state, self, depth);
    00476 }
    00477
    00478 /*
    00479  * call-seq: String.included(modul)
    00480  *
    00481  * Extends _modul_ with the String::Extend module.
    00482  */
    00483 static VALUE mString_included_s(VALUE self, VALUE modul) {
    00484     VALUE result = rb_funcall(modul, i_extend, 1, mString_Extend);
    00485     return result;
    00486 }
    00487
    00488 /*
    00489  * call-seq: to_json(*)
    00490  *
    00491  * This string should be encoded with UTF-8 A call to this method
    00492  * returns a JSON string encoded with UTF16 big endian characters as
    00493  * \u????.
    00494  */
    00495 static VALUE mString_to_json(int argc, VALUE *argv, VALUE self)
    00496 {
    00497     VALUE state, depth;
    00498     rb_scan_args(argc, argv, "02", &state, &depth);
    00499     state = cState_from_state_s(cState, state);
    00500     return cState_partial_generate(state, self, depth);
    00501 }
    00502
    00503 /*
    00504  * call-seq: to_json_raw_object()
    00505  *
    00506  * This method creates a raw object hash, that can be nested into
    00507  * other data structures and will be generated as a raw string. This
    00508  * method should be used, if you want to convert raw strings to JSON
    00509  * instead of UTF-8 strings, e. g. binary data.
    00510  */
    00511 static VALUE mString_to_json_raw_object(VALUE self)
    00512 {
    00513     VALUE ary;
    00514     VALUE result = rb_hash_new();
    00515     rb_hash_aset(result, rb_funcall(mJSON, i_create_id, 0), rb_class_name(rb_obj_class(self)));
    00516     ary = rb_funcall(self, i_unpack, 1, rb_str_new2("C*"));
    00517     rb_hash_aset(result, rb_str_new2("raw"), ary);
    00518     return result;
    00519 }
    00520
    00521 /*
    00522  * call-seq: to_json_raw(*args)
    00523  *
    00524  * This method creates a JSON text from the result of a call to
    00525  * to_json_raw_object of this String.
    00526  */
    00527 static VALUE mString_to_json_raw(int argc, VALUE *argv, VALUE self)
    00528 {
    00529     VALUE obj = mString_to_json_raw_object(self);
    00530     Check_Type(obj, T_HASH);
    00531     return mHash_to_json(argc, argv, obj);
    00532 }
    00533
    00534 /*
    00535  * call-seq: json_create(o)
    00536  *
    00537  * Raw Strings are JSON Objects (the raw bytes are stored in an array for the
    00538  * key "raw"). The Ruby String can be created by this module method.
    00539  */
    00540 static VALUE mString_Extend_json_create(VALUE self, VALUE o)
    00541 {
    00542     VALUE ary;
    00543     Check_Type(o, T_HASH);
    00544     ary = rb_hash_aref(o, rb_str_new2("raw"));
    00545     return rb_funcall(ary, i_pack, 1, rb_str_new2("C*"));
    00546 }
    00547
    00548 /*
    00549  * call-seq: to_json(*)
    00550  *
    00551  * Returns a JSON string for true: 'true'.
    00552  */
    00553 static VALUE mTrueClass_to_json(int argc, VALUE *argv, VALUE self)
    00554 {
    00555     VALUE state, depth;
    00556     rb_scan_args(argc, argv, "02", &state, &depth);
    00557     state = cState_from_state_s(cState, state);
    00558     return cState_partial_generate(state, self, depth);
    00559 }
    00560
    00561 /*
    00562  * call-seq: to_json(*)
    00563  *
    00564  * Returns a JSON string for false: 'false'.
    00565  */
    00566 static VALUE mFalseClass_to_json(int argc, VALUE *argv, VALUE self)
    00567 {
    00568     VALUE state, depth;
    00569     rb_scan_args(argc, argv, "02", &state, &depth);
    00570     state = cState_from_state_s(cState, state);
    00571     return cState_partial_generate(state, self, depth);
    00572 }
    00573
    00574 /*
    00575  * call-seq: to_json(*)
    00576  *
    00577  */
    00578 static VALUE mNilClass_to_json(int argc, VALUE *argv, VALUE self)
    00579 {
    00580     VALUE state, depth;
    00581     rb_scan_args(argc, argv, "02", &state, &depth);
    00582     state = cState_from_state_s(cState, state);
    00583     return cState_partial_generate(state, self, depth);
    00584 }
    00585
    00586 /*
    00587  * call-seq: to_json(*)
    00588  *
    00589  * Converts this object to a string (calling #to_s), converts
    00590  * it to a JSON string, and returns the result. This is a fallback, if no
    00591  * special method #to_json was defined for some object.
    00592  */
    00593 static VALUE mObject_to_json(int argc, VALUE *argv, VALUE self)
    00594 {
    00595     VALUE state, depth;
    00596     VALUE string = rb_funcall(self, i_to_s, 0);
    00597     rb_scan_args(argc, argv, "02", &state, &depth);
    00598     Check_Type(string, T_STRING);
    00599     state = cState_from_state_s(cState, state);
    00600     return cState_partial_generate(state, string, depth);
    00601 }
    00602
    00603 static void State_free(JSON_Generator_State *state)
    00604 {
    00605     if (state->indent) ruby_xfree(state->indent);
    00606     if (state->space) ruby_xfree(state->space);
    00607     if (state->space_before) ruby_xfree(state->space_before);
    00608     if (state->object_nl) ruby_xfree(state->object_nl);
    00609     if (state->array_nl) ruby_xfree(state->array_nl);
    00610     if (state->array_delim) fbuffer_free(state->array_delim);
    00611     if (state->object_delim) fbuffer_free(state->object_delim);
    00612     if (state->object_delim2) fbuffer_free(state->object_delim2);
    00613     ruby_xfree(state);
    00614 }
    00615
    00616 static JSON_Generator_State *State_allocate()
    00617 {
    00618     JSON_Generator_State *state = ALLOC(JSON_Generator_State);
    00619     return state;
    00620 }
    00621
    00622 static VALUE cState_s_allocate(VALUE klass)
    00623 {
    00624     JSON_Generator_State *state = State_allocate();
    00625     return Data_Wrap_Struct(klass, NULL, State_free, state);
    00626 }
    00627
    00628 /*
    00629  * call-seq: configure(opts)
    00630  *
    00631  * Configure this State instance with the Hash _opts_, and return
    00632  * itself.
    00633  */
    00634 static VALUE cState_configure(VALUE self, VALUE opts)
    00635 {
    00636     VALUE tmp;
    00637     GET_STATE(self);
    00638     tmp = rb_convert_type(opts, T_HASH, "Hash", "to_hash");
    00639     if (NIL_P(tmp)) tmp = rb_convert_type(opts, T_HASH, "Hash", "to_h");
    00640     if (NIL_P(tmp)) {
    00641         rb_raise(rb_eArgError, "opts has to be hash like or convertable into a hash");
    00642     }
    00643     opts = tmp;
    00644     tmp = rb_hash_aref(opts, ID2SYM(i_indent));
    00645     if (RTEST(tmp)) {
    00646         int len;
    00647         Check_Type(tmp, T_STRING);
    00648         len = RSTRING_LEN(tmp);
    00649         state->indent = fstrndup(RSTRING_PTR(tmp), len);
    00650         state->indent_len = len;
    00651     }
    00652     tmp = rb_hash_aref(opts, ID2SYM(i_space));
    00653     if (RTEST(tmp)) {
    00654         int len;
    00655         Check_Type(tmp, T_STRING);
    00656         len = RSTRING_LEN(tmp);
    00657         state->space = fstrndup(RSTRING_PTR(tmp), len);
    00658         state->space_len = len;
    00659     }
    00660     tmp = rb_hash_aref(opts, ID2SYM(i_space_before));
    00661     if (RTEST(tmp)) {
    00662         int len;
    00663         Check_Type(tmp, T_STRING);
    00664         len = RSTRING_LEN(tmp);
    00665         state->space_before = fstrndup(RSTRING_PTR(tmp), len);
    00666         state->space_before_len = len;
    00667     }
    00668     tmp = rb_hash_aref(opts, ID2SYM(i_array_nl));
    00669     if (RTEST(tmp)) {
    00670         int len;
    00671         Check_Type(tmp, T_STRING);
    00672         len = RSTRING_LEN(tmp);
    00673         state->array_nl = fstrndup(RSTRING_PTR(tmp), len);
    00674         state->array_nl_len = len;
    00675     }
    00676     tmp = rb_hash_aref(opts, ID2SYM(i_object_nl));
    00677     if (RTEST(tmp)) {
    00678         int len;
    00679         Check_Type(tmp, T_STRING);
    00680         len = RSTRING_LEN(tmp);
    00681         state->object_nl = fstrndup(RSTRING_PTR(tmp), len);
    00682         state->object_nl_len = len;
    00683     }
    00684     tmp = ID2SYM(i_max_nesting);
    00685     state->max_nesting = 19;
    00686     if (option_given_p(opts, tmp)) {
    00687         VALUE max_nesting = rb_hash_aref(opts, tmp);
    00688         if (RTEST(max_nesting)) {
    00689             Check_Type(max_nesting, T_FIXNUM);
    00690             state->max_nesting = FIX2LONG(max_nesting);
    00691         } else {
    00692             state->max_nesting = 0;
    00693         }
    00694     }
    00695     tmp = rb_hash_aref(opts, ID2SYM(i_allow_nan));
    00696     state->allow_nan = RTEST(tmp);
    00697     tmp = rb_hash_aref(opts, ID2SYM(i_ascii_only));
    00698     state->ascii_only = RTEST(tmp);
    00699     return self;
    00700 }
    00701
    00702 /*
    00703  * call-seq: to_h
    00704  *
    00705  * Returns the configuration instance variables as a hash, that can be
    00706  * passed to the configure method.
    00707  */
    00708 static VALUE cState_to_h(VALUE self)
    00709 {
    00710     VALUE result = rb_hash_new();
    00711     GET_STATE(self);
    00712     rb_hash_aset(result, ID2SYM(i_indent), rb_str_new(state->indent, state->indent_len));
    00713     rb_hash_aset(result, ID2SYM(i_space), rb_str_new(state->space, state->space_len));
    00714     rb_hash_aset(result, ID2SYM(i_space_before), rb_str_new(state->space_before, state->space_before_len));
    00715     rb_hash_aset(result, ID2SYM(i_object_nl), rb_str_new(state->object_nl, state->object_nl_len));
    00716     rb_hash_aset(result, ID2SYM(i_array_nl), rb_str_new(state->array_nl, state->array_nl_len));
    00717     rb_hash_aset(result, ID2SYM(i_allow_nan), state->allow_nan ? Qtrue : Qfalse);
    00718     rb_hash_aset(result, ID2SYM(i_ascii_only), state->ascii_only ? Qtrue : Qfalse);
    00719     rb_hash_aset(result, ID2SYM(i_max_nesting), LONG2FIX(state->max_nesting));
    00720     return result;
    00721 }
    00722
    00723 /*
    00724 * call-seq: [](name)
    00725 *
    00726 * Return the value returned by method +name+.
    00727 */
    00728 static VALUE cState_aref(VALUE self, VALUE name)
    00729 {
    00730     GET_STATE(self);
    00731     if (RTEST(rb_funcall(self, i_respond_to_p, 1, name))) {
    00732         return rb_funcall(self, i_send, 1, name);
    00733     } else {
    00734         return Qnil;
    00735     }
    00736 }
    00737
    00738 static void generate_json(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj, long depth)
    00739 {
    00740     VALUE tmp;
    00741     switch (TYPE(obj)) {
    00742         case T_HASH:
    00743             {
    00744                 char *object_nl = state->object_nl;
    00745                 long object_nl_len = state->object_nl_len;
    00746                 char *indent = state->indent;
    00747                 long indent_len = state->indent_len;
    00748                 long max_nesting = state->max_nesting;
    00749                 char *delim = FBUFFER_PTR(state->object_delim);
    00750                 long delim_len = FBUFFER_LEN(state->object_delim);
    00751                 char *delim2 = FBUFFER_PTR(state->object_delim2);
    00752                 long delim2_len = FBUFFER_LEN(state->object_delim2);
    00753                 int i, j;
    00754                 VALUE key, key_to_s, keys;
    00755                 depth++;
    00756                 if (max_nesting != 0 && depth > max_nesting) {
    00757                     fbuffer_free(buffer);
    00758                     rb_raise(eNestingError, "nesting of %ld is too deep", depth);
    00759                 }
    00760                 fbuffer_append_char(buffer, '{');
    00761                 keys = rb_funcall(obj, rb_intern("keys"), 0);
    00762                 for(i = 0; i < RARRAY_LEN(keys); i++) {
    00763                     if (i > 0) fbuffer_append(buffer, delim, delim_len);
    00764                     if (object_nl) {
    00765                         fbuffer_append(buffer, object_nl, object_nl_len);
    00766                     }
    00767                     if (indent) {
    00768                         for (j = 0; j < depth; j++) {
    00769                             fbuffer_append(buffer, indent, indent_len);
    00770                         }
    00771                     }
    00772                     key = rb_ary_entry(keys, i);
    00773                     key_to_s = rb_funcall(key, i_to_s, 0);
    00774                     Check_Type(key_to_s, T_STRING);
    00775                     generate_json(buffer, Vstate, state, key_to_s, depth);
    00776                     fbuffer_append(buffer, delim2, delim2_len);
    00777                     generate_json(buffer, Vstate, state, rb_hash_aref(obj, key), depth);
    00778                 }
    00779                 depth--;
    00780                 if (object_nl) {
    00781                     fbuffer_append(buffer, object_nl, object_nl_len);
    00782                     if (indent) {
    00783                         for (j = 0; j < depth; j++) {
    00784                             fbuffer_append(buffer, indent, indent_len);
    00785                         }
    00786                     }
    00787                 }
    00788                 fbuffer_append_char(buffer, '}');
    00789             }
    00790             break;
    00791         case T_ARRAY:
    00792             {
    00793                 char *array_nl = state->array_nl;
    00794                 long array_nl_len = state->array_nl_len;
    00795                 char *indent = state->indent;
    00796                 long indent_len = state->indent_len;
    00797                 long max_nesting = state->max_nesting;
    00798                 char *delim = FBUFFER_PTR(state->array_delim);
    00799                 long delim_len = FBUFFER_LEN(state->array_delim);
    00800                 int i, j;
    00801                 depth++;
    00802                 if (max_nesting != 0 && depth > max_nesting) {
    00803                     fbuffer_free(buffer);
    00804                     rb_raise(eNestingError, "nesting of %ld is too deep", depth);
    00805                 }
    00806                 fbuffer_append_char(buffer, '[');
    00807                 if (array_nl) fbuffer_append(buffer, array_nl, array_nl_len);
    00808                 for(i = 0; i < RARRAY_LEN(obj); i++) {
    00809                     if (i > 0) fbuffer_append(buffer, delim, delim_len);
    00810                     if (indent) {
    00811                         for (j = 0; j < depth; j++) {
    00812                             fbuffer_append(buffer, indent, indent_len);
    00813                         }
    00814                     }
    00815                     generate_json(buffer, Vstate, state, rb_ary_entry(obj, i), depth);
    00816                 }
    00817                 depth--;
    00818                 if (array_nl) {
    00819                     fbuffer_append(buffer, array_nl, array_nl_len);
    00820                     if (indent) {
    00821                         for (j = 0; j < depth; j++) {
    00822                             fbuffer_append(buffer, indent, indent_len);
    00823                         }
    00824                     }
    00825                 }
    00826                 fbuffer_append_char(buffer, ']');
    00827             }
    00828             break;
    00829         case T_STRING:
    00830             fbuffer_append_char(buffer, '"');
    00831 #ifdef HAVE_RUBY_ENCODING_H
    00832             obj = rb_funcall(obj, i_encode, 1, CEncoding_UTF_8);
    00833 #endif
    00834             if (state->ascii_only) {
    00835                 convert_UTF8_to_JSON_ASCII(buffer, obj);
    00836             } else {
    00837                 convert_UTF8_to_JSON(buffer, obj);
    00838             }
    00839             fbuffer_append_char(buffer, '"');
    00840             break;
    00841         case T_NIL:
    00842             fbuffer_append(buffer, "null", 4);
    00843             break;
    00844         case T_FALSE:
    00845             fbuffer_append(buffer, "false", 5);
    00846             break;
    00847         case T_TRUE:
    00848             fbuffer_append(buffer, "true", 4);
    00849             break;
    00850         case T_FIXNUM:
    00851             fbuffer_append_long(buffer, FIX2LONG(obj));
    00852             break;
    00853         case T_BIGNUM:
    00854             tmp = rb_funcall(obj, i_to_s, 0);
    00855             fbuffer_append(buffer, RSTRING_PAIR(tmp));
    00856             break;
    00857         case T_FLOAT:
    00858             {
    00859                 double value = RFLOAT_VALUE(obj);
    00860                 char allow_nan = state->allow_nan;
    00861                 tmp = rb_funcall(obj, i_to_s, 0);
    00862                 if (!allow_nan) {
    00863                     if (isinf(value)) {
    00864                         fbuffer_free(buffer);
    00865                         rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp));
    00866                     } else if (isnan(value)) {
    00867                         fbuffer_free(buffer);
    00868                         rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp));
    00869                     }
    00870                 }
    00871                 fbuffer_append(buffer, RSTRING_PAIR(tmp));
    00872             }
    00873             break;
    00874         default:
    00875             if (rb_respond_to(obj, i_to_json)) {
    00876                 tmp = rb_funcall(obj, i_to_json, 2, Vstate, INT2FIX(depth + 1));
    00877                 Check_Type(tmp, T_STRING);
    00878                 fbuffer_append(buffer, RSTRING_PAIR(tmp));
    00879             } else {
    00880                 tmp = rb_funcall(obj, i_to_s, 0);
    00881                 Check_Type(tmp, T_STRING);
    00882                 generate_json(buffer, Vstate, state, tmp, depth + 1);
    00883             }
    00884             break;
    00885     }
    00886 }
    00887
    00888 /*
    00889  * call-seq: partial_generate(obj)
    00890  *
    00891  * Generates a part of a JSON document from object +obj+ and returns the
    00892  * result.
    00893  */
    00894 static VALUE cState_partial_generate(VALUE self, VALUE obj, VALUE depth)
    00895 {
    00896     VALUE result;
    00897     FBuffer *buffer = fbuffer_alloc();
    00898     GET_STATE(self);
    00899
    00900     if (state->object_delim) {
    00901         fbuffer_clear(state->object_delim);
    00902     } else {
    00903         state->object_delim = fbuffer_alloc_with_length(16);
    00904     }
    00905     fbuffer_append_char(state->object_delim, ',');
    00906     if (state->object_delim2) {
    00907         fbuffer_clear(state->object_delim2);
    00908     } else {
    00909         state->object_delim2 = fbuffer_alloc_with_length(16);
    00910     }
    00911     fbuffer_append_char(state->object_delim2, ':');
    00912     if (state->space) fbuffer_append(state->object_delim2, state->space, state->space_len);
    00913
    00914     if (state->array_delim) {
    00915         fbuffer_clear(state->array_delim);
    00916     } else {
    00917         state->array_delim = fbuffer_alloc_with_length(16);
    00918     }
    00919     fbuffer_append_char(state->array_delim, ',');
    00920     if (state->array_nl) fbuffer_append(state->array_delim, state->array_nl, state->array_nl_len);
    00921
    00922     generate_json(buffer, self, state, obj, NIL_P(depth) ? 0 : FIX2INT(depth));
    00923     result = rb_str_new(FBUFFER_PAIR(buffer));
    00924     fbuffer_free(buffer);
    00925     FORCE_UTF8(result);
    00926     return result;
    00927 }
    00928
    00929 /*
    00930  * call-seq: generate(obj)
    00931  *
    00932  * Generates a valid JSON document from object +obj+ and returns the
    00933  * result. If no valid JSON document can be created this method raises a
    00934  * GeneratorError exception.
    00935  */
    00936 static VALUE cState_generate(VALUE self, VALUE obj)
    00937 {
    00938     VALUE result = cState_partial_generate(self, obj, Qnil);
    00939     VALUE re, args[2];
    00940     args[0] = rb_str_new2("\\A\\s*(?:\\[.*\\]|\\{.*\\})\\s*\\Z");
    00941     args[1] = CRegexp_MULTILINE;
    00942     re = rb_class_new_instance(2, args, rb_cRegexp);
    00943     if (NIL_P(rb_funcall(re, i_match, 1, result))) {
    00944         rb_raise(eGeneratorError, "only generation of JSON objects or arrays allowed");
    00945     }
    00946     return result;
    00947 }
    00948
    00949 /*
    00950  * call-seq: new(opts = {})
    00951  *
    00952  * Instantiates a new State object, configured by _opts_.
    00953  *
    00954  * _opts_ can have the following keys:
    00955  *
    00956  * * *indent*: a string used to indent levels (default: ''),
    00957  * * *space*: a string that is put after, a : or , delimiter (default: ''),
    00958  * * *space_before*: a string that is put before a : pair delimiter (default: ''),
    00959  * * *object_nl*: a string that is put at the end of a JSON object (default: ''),
    00960  * * *array_nl*: a string that is put at the end of a JSON array (default: ''),
    00961  * * *allow_nan*: true if NaN, Infinity, and -Infinity should be
    00962  *   generated, otherwise an exception is thrown, if these values are
    00963  *   encountered. This options defaults to false.
    00964  */
    00965 static VALUE cState_initialize(int argc, VALUE *argv, VALUE self)
    00966 {
    00967     VALUE opts;
    00968     GET_STATE(self);
    00969     MEMZERO(state, JSON_Generator_State, 1);
    00970     state->max_nesting = 19;
    00971     rb_scan_args(argc, argv, "01", &opts);
    00972     if (!NIL_P(opts)) cState_configure(self, opts);
    00973     return self;
    00974 }
    00975
    00976 /*
    00977  * call-seq: initialize_copy(orig)
    00978  *
    00979  * Initializes this object from orig if it to be duplicated/cloned and returns
    00980  * it.
    00981 */
    00982 static VALUE cState_init_copy(VALUE obj, VALUE orig)
    00983 {
    00984     JSON_Generator_State *objState, *origState;
    00985
    00986     Data_Get_Struct(obj, JSON_Generator_State, objState);
    00987     Data_Get_Struct(orig, JSON_Generator_State, origState);
    00988     if (!objState) rb_raise(rb_eArgError, "unallocated JSON::State");
    00989
    00990     MEMCPY(objState, origState, JSON_Generator_State, 1);
    00991     objState->indent = fstrndup(origState->indent, origState->indent_len);
    00992     objState->space = fstrndup(origState->space, origState->space_len);
    00993     objState->space_before = fstrndup(origState->space_before, origState->space_before_len);
    00994     objState->object_nl = fstrndup(origState->object_nl, origState->object_nl_len);
    00995     objState->array_nl = fstrndup(origState->array_nl, origState->array_nl_len);
    00996     if (origState->array_delim) objState->array_delim = fbuffer_dup(origState->array_delim);
    00997     if (origState->object_delim) objState->object_delim = fbuffer_dup(origState->object_delim);
    00998     if (origState->object_delim2) objState->object_delim2 = fbuffer_dup(origState->object_delim2);
    00999     return obj;
    01000 }
    01001
    01002 /*
    01003  * call-seq: from_state(opts)
    01004  *
    01005  * Creates a State object from _opts_, which ought to be Hash to create a
    01006  * new State instance configured by _opts_, something else to create an
    01007  * unconfigured instance. If _opts_ is a State object, it is just returned.
    01008  */
    01009 static VALUE cState_from_state_s(VALUE self, VALUE opts)
    01010 {
    01011     if (rb_obj_is_kind_of(opts, self)) {
    01012         return opts;
    01013     } else if (rb_obj_is_kind_of(opts, rb_cHash)) {
    01014         return rb_funcall(self, i_new, 1, opts);
    01015     } else {
    01016         if (NIL_P(CJSON_SAFE_STATE_PROTOTYPE)) {
    01017             CJSON_SAFE_STATE_PROTOTYPE = rb_const_get(mJSON, rb_intern("SAFE_STATE_PROTOTYPE"));
    01018         }
    01019         return CJSON_SAFE_STATE_PROTOTYPE;
    01020     }
    01021 }
    01022
    01023 /*
    01024  * call-seq: indent()
    01025  *
    01026  * This string is used to indent levels in the JSON text.
    01027  */
    01028 static VALUE cState_indent(VALUE self)
    01029 {
    01030     GET_STATE(self);
    01031     return state->indent ? rb_str_new2(state->indent) : rb_str_new2("");
    01032 }
    01033
    01034 /*
    01035  * call-seq: indent=(indent)
    01036  *
    01037  * This string is used to indent levels in the JSON text.
    01038  */
    01039 static VALUE cState_indent_set(VALUE self, VALUE indent)
    01040 {
    01041     GET_STATE(self);
    01042     Check_Type(indent, T_STRING);
    01043     if (RSTRING_LEN(indent) == 0) {
    01044         if (state->indent) {
    01045             ruby_xfree(state->indent);
    01046             state->indent = NULL;
    01047         }
    01048     } else {
    01049         if (state->indent) ruby_xfree(state->indent);
    01050         state->indent = strdup(RSTRING_PTR(indent));
    01051     }
    01052     return Qnil;
    01053 }
    01054
    01055 /*
    01056  * call-seq: space()
    01057  *
    01058  * This string is used to insert a space between the tokens in a JSON
    01059  * string.
    01060  */
    01061 static VALUE cState_space(VALUE self)
    01062 {
    01063     GET_STATE(self);
    01064     return state->space ? rb_str_new2(state->space) : rb_str_new2("");
    01065 }
    01066
    01067 /*
    01068  * call-seq: space=(space)
    01069  *
    01070  * This string is used to insert a space between the tokens in a JSON
    01071  * string.
    01072  */
    01073 static VALUE cState_space_set(VALUE self, VALUE space)
    01074 {
    01075     GET_STATE(self);
    01076     Check_Type(space, T_STRING);
    01077     if (RSTRING_LEN(space) == 0) {
    01078         if (state->space) {
    01079             ruby_xfree(state->space);
    01080             state->space = NULL;
    01081         }
    01082     } else {
    01083         if (state->space) ruby_xfree(state->space);
    01084         state->space = strdup(RSTRING_PTR(space));
    01085     }
    01086     return Qnil;
    01087 }
    01088
    01089 /*
    01090  * call-seq: space_before()
    01091  *
    01092  * This string is used to insert a space before the ':' in JSON objects.
    01093  */
    01094 static VALUE cState_space_before(VALUE self)
    01095 {
    01096     GET_STATE(self);
    01097     return state->space_before ? rb_str_new2(state->space_before) : rb_str_new2("");
    01098 }
    01099
    01100 /*
    01101  * call-seq: space_before=(space_before)
    01102  *
    01103  * This string is used to insert a space before the ':' in JSON objects.
    01104  */
    01105 static VALUE cState_space_before_set(VALUE self, VALUE space_before)
    01106 {
    01107     GET_STATE(self);
    01108     Check_Type(space_before, T_STRING);
    01109     if (RSTRING_LEN(space_before) == 0) {
    01110         if (state->space_before) {
    01111             ruby_xfree(state->space_before);
    01112             state->space_before = NULL;
    01113         }
    01114     } else {
    01115         if (state->space_before) ruby_xfree(state->space_before);
    01116         state->space_before = strdup(RSTRING_PTR(space_before));
    01117     }
    01118     return Qnil;
    01119 }
    01120
    01121 /*
    01122  * call-seq: object_nl()
    01123  *
    01124  * This string is put at the end of a line that holds a JSON object (or
    01125  * Hash).
    01126  */
    01127 static VALUE cState_object_nl(VALUE self)
    01128 {
    01129     GET_STATE(self);
    01130     return state->object_nl ? rb_str_new2(state->object_nl) : rb_str_new2("");
    01131 }
    01132
    01133 /*
    01134  * call-seq: object_nl=(object_nl)
    01135  *
    01136  * This string is put at the end of a line that holds a JSON object (or
    01137  * Hash).
    01138  */
    01139 static VALUE cState_object_nl_set(VALUE self, VALUE object_nl)
    01140 {
    01141     GET_STATE(self);
    01142     Check_Type(object_nl, T_STRING);
    01143     if (RSTRING_LEN(object_nl) == 0) {
    01144         if (state->object_nl) {
    01145             ruby_xfree(state->object_nl);
    01146             state->object_nl = NULL;
    01147         }
    01148     } else {
    01149         if (state->object_nl) ruby_xfree(state->object_nl);
    01150         state->object_nl = strdup(RSTRING_PTR(object_nl));
    01151     }
    01152     return Qnil;
    01153 }
    01154
    01155 /*
    01156  * call-seq: array_nl()
    01157  *
    01158  * This string is put at the end of a line that holds a JSON array.
    01159  */
    01160 static VALUE cState_array_nl(VALUE self)
    01161 {
    01162     GET_STATE(self);
    01163     return state->array_nl ? rb_str_new2(state->array_nl) : rb_str_new2("");
    01164 }
    01165
    01166 /*
    01167  * call-seq: array_nl=(array_nl)
    01168  *
    01169  * This string is put at the end of a line that holds a JSON array.
    01170  */
    01171 static VALUE cState_array_nl_set(VALUE self, VALUE array_nl)
    01172 {
    01173     GET_STATE(self);
    01174     Check_Type(array_nl, T_STRING);
    01175     if (RSTRING_LEN(array_nl) == 0) {
    01176         if (state->array_nl) {
    01177             ruby_xfree(state->array_nl);
    01178             state->array_nl = NULL;
    01179         }
    01180     } else {
    01181         if (state->array_nl) ruby_xfree(state->array_nl);
    01182         state->array_nl = strdup(RSTRING_PTR(array_nl));
    01183     }
    01184     return Qnil;
    01185 }
    01186
    01187
    01188 /*
    01189 * call-seq: check_circular?
    01190 *
    01191 * Returns true, if circular data structures should be checked,
    01192 * otherwise returns false.
    01193 */
    01194 static VALUE cState_check_circular_p(VALUE self)
    01195 {
    01196     GET_STATE(self);
    01197     return state->max_nesting ? Qtrue : Qfalse;
    01198 }
    01199
    01200 /*
    01201  * call-seq: max_nesting
    01202  *
    01203  * This integer returns the maximum level of data structure nesting in
    01204  * the generated JSON, max_nesting = 0 if no maximum is checked.
    01205  */
    01206 static VALUE cState_max_nesting(VALUE self)
    01207 {
    01208     GET_STATE(self);
    01209     return LONG2FIX(state->max_nesting);
    01210 }
    01211
    01212 /*
    01213  * call-seq: max_nesting=(depth)
    01214  *
    01215  * This sets the maximum level of data structure nesting in the generated JSON
    01216  * to the integer depth, max_nesting = 0 if no maximum should be checked.
    01217  */
    01218 static VALUE cState_max_nesting_set(VALUE self, VALUE depth)
    01219 {
    01220     GET_STATE(self);
    01221     Check_Type(depth, T_FIXNUM);
    01222     return state->max_nesting = FIX2LONG(depth);
    01223 }
    01224
    01225 /*
    01226  * call-seq: allow_nan?
    01227  *
    01228  * Returns true, if NaN, Infinity, and -Infinity should be generated, otherwise
    01229  * returns false.
    01230  */
    01231 static VALUE cState_allow_nan_p(VALUE self)
    01232 {
    01233     GET_STATE(self);
    01234     return state->allow_nan ? Qtrue : Qfalse;
    01235 }
    01236
    01237 /*
    01238  * call-seq: ascii_only?
    01239  *
    01240  * Returns true, if NaN, Infinity, and -Infinity should be generated, otherwise
    01241  * returns false.
    01242  */
    01243 static VALUE cState_ascii_only_p(VALUE self)
    01244 {
    01245     GET_STATE(self);
    01246     return state->ascii_only ? Qtrue : Qfalse;
    01247 }
    01248
    01249 /*
    01250  *
    01251  */
    01252 void Init_generator()
    01253 {
    01254     rb_require("json/common");
    01255
    01256     mJSON = rb_define_module("JSON");
    01257     mExt = rb_define_module_under(mJSON, "Ext");
    01258     mGenerator = rb_define_module_under(mExt, "Generator");
    01259
    01260     eGeneratorError = rb_path2class("JSON::GeneratorError");
    01261     eNestingError = rb_path2class("JSON::NestingError");
    01262
    01263     cState = rb_define_class_under(mGenerator, "State", rb_cObject);
    01264     rb_define_alloc_func(cState, cState_s_allocate);
    01265     rb_define_singleton_method(cState, "from_state", cState_from_state_s, 1);
    01266     rb_define_method(cState, "initialize", cState_initialize, -1);
    01267     rb_define_method(cState, "initialize_copy", cState_init_copy, 1);
    01268     rb_define_method(cState, "indent", cState_indent, 0);
    01269     rb_define_method(cState, "indent=", cState_indent_set, 1);
    01270     rb_define_method(cState, "space", cState_space, 0);
    01271     rb_define_method(cState, "space=", cState_space_set, 1);
    01272     rb_define_method(cState, "space_before", cState_space_before, 0);
    01273     rb_define_method(cState, "space_before=", cState_space_before_set, 1);
    01274     rb_define_method(cState, "object_nl", cState_object_nl, 0);
    01275     rb_define_method(cState, "object_nl=", cState_object_nl_set, 1);
    01276     rb_define_method(cState, "array_nl", cState_array_nl, 0);
    01277     rb_define_method(cState, "array_nl=", cState_array_nl_set, 1);
    01278     rb_define_method(cState, "max_nesting", cState_max_nesting, 0);
    01279     rb_define_method(cState, "max_nesting=", cState_max_nesting_set, 1);
    01280     rb_define_method(cState, "check_circular?", cState_check_circular_p, 0);
    01281     rb_define_method(cState, "allow_nan?", cState_allow_nan_p, 0);
    01282     rb_define_method(cState, "ascii_only?", cState_ascii_only_p, 0);
    01283     rb_define_method(cState, "configure", cState_configure, 1);
    01284     rb_define_method(cState, "to_h", cState_to_h, 0);
    01285     rb_define_method(cState, "[]", cState_aref, 1);
    01286     rb_define_method(cState, "generate", cState_generate, 1);
    01287     rb_define_method(cState, "partial_generate", cState_partial_generate, 1);
    01288
    01289     mGeneratorMethods = rb_define_module_under(mGenerator, "GeneratorMethods");
    01290     mObject = rb_define_module_under(mGeneratorMethods, "Object");
    01291     rb_define_method(mObject, "to_json", mObject_to_json, -1);
    01292     mHash = rb_define_module_under(mGeneratorMethods, "Hash");
    01293     rb_define_method(mHash, "to_json", mHash_to_json, -1);
    01294     mArray = rb_define_module_under(mGeneratorMethods, "Array");
    01295     rb_define_method(mArray, "to_json", mArray_to_json, -1);
    01296     mInteger = rb_define_module_under(mGeneratorMethods, "Integer");
    01297     rb_define_method(mInteger, "to_json", mInteger_to_json, -1);
    01298     mFloat = rb_define_module_under(mGeneratorMethods, "Float");
    01299     rb_define_method(mFloat, "to_json", mFloat_to_json, -1);
    01300     mString = rb_define_module_under(mGeneratorMethods, "String");
    01301     rb_define_singleton_method(mString, "included", mString_included_s, 1);
    01302     rb_define_method(mString, "to_json", mString_to_json, -1);
    01303     rb_define_method(mString, "to_json_raw", mString_to_json_raw, -1);
    01304     rb_define_method(mString, "to_json_raw_object", mString_to_json_raw_object, 0);
    01305     mString_Extend = rb_define_module_under(mString, "Extend");
    01306     rb_define_method(mString_Extend, "json_create", mString_Extend_json_create, 1);
    01307     mTrueClass = rb_define_module_under(mGeneratorMethods, "TrueClass");
    01308     rb_define_method(mTrueClass, "to_json", mTrueClass_to_json, -1);
    01309     mFalseClass = rb_define_module_under(mGeneratorMethods, "FalseClass");
    01310     rb_define_method(mFalseClass, "to_json", mFalseClass_to_json, -1);
    01311     mNilClass = rb_define_module_under(mGeneratorMethods, "NilClass");
    01312     rb_define_method(mNilClass, "to_json", mNilClass_to_json, -1);
    01313
    01314     CRegexp_MULTILINE = rb_const_get(rb_cRegexp, rb_intern("MULTILINE"));
    01315     i_to_s = rb_intern("to_s");
    01316     i_to_json = rb_intern("to_json");
    01317     i_new = rb_intern("new");
    01318     i_indent = rb_intern("indent");
    01319     i_space = rb_intern("space");
    01320     i_space_before = rb_intern("space_before");
    01321     i_object_nl = rb_intern("object_nl");
    01322     i_array_nl = rb_intern("array_nl");
    01323     i_max_nesting = rb_intern("max_nesting");
    01324     i_allow_nan = rb_intern("allow_nan");
    01325     i_ascii_only = rb_intern("ascii_only");
    01326     i_pack = rb_intern("pack");
    01327     i_unpack = rb_intern("unpack");
    01328     i_create_id = rb_intern("create_id");
    01329     i_extend = rb_intern("extend");
    01330     i_key_p = rb_intern("key?");
    01331     i_aref = rb_intern("[]");
    01332     i_send = rb_intern("__send__");
    01333     i_respond_to_p = rb_intern("respond_to?");
    01334     i_match = rb_intern("match");
    01335 #ifdef HAVE_RUBY_ENCODING_H
    01336     CEncoding_UTF_8 = rb_funcall(rb_path2class("Encoding"), rb_intern("find"), 1, rb_str_new2("utf-8"));
    01337     i_encoding = rb_intern("encoding");
    01338     i_encode = rb_intern("encode");
    01339 #endif
    01340     CJSON_SAFE_STATE_PROTOTYPE = Qnil;
    01341 }
    01342