#include "generator.h" #ifdef HAVE_RUBY_ENCODING_H static VALUE CEncoding_UTF_8; static ID i_encoding, i_encode; #endif static VALUE mJSON, mExt, mGenerator, cState, mGeneratorMethods, mObject, mHash, mArray, mInteger, mFloat, mString, mString_Extend, mTrueClass, mFalseClass, mNilClass, eGeneratorError, eNestingError, CRegexp_MULTILINE, CJSON_SAFE_STATE_PROTOTYPE; static ID i_to_s, i_to_json, i_new, i_indent, i_space, i_space_before, i_object_nl, i_array_nl, i_max_nesting, i_allow_nan, i_ascii_only, i_pack, i_unpack, i_create_id, i_extend, i_key_p, i_aref, i_send, i_respond_to_p, i_match; /* * Copyright 2001-2004 Unicode, Inc. * * Disclaimer * * This source code is provided as is by Unicode, Inc. No claims are * made as to fitness for any particular purpose. No warranties of any * kind are expressed or implied. The recipient agrees to determine * applicability of information provided. If this file has been * purchased on magnetic or optical media from Unicode, Inc., the * sole remedy for any claim will be exchange of defective media * within 90 days of receipt. * * Limitations on Rights to Redistribute This Code * * Unicode, Inc. hereby grants the right to freely use the information * supplied in this file in the creation of products supporting the * Unicode Standard, and to make copies of this file in any form * for internal or external distribution as long as this notice * remains attached. */ /* * Index into the table below with the first byte of a UTF-8 sequence to * get the number of trailing bytes that are supposed to follow it. * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is * left as-is for anyone who may want to do such conversion, which was * allowed in earlier algorithms. */ static const char trailingBytesForUTF8[256] = { 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, 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, 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, 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, 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, 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, 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, 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 }; /* * Magic values subtracted from a buffer value during UTF8 conversion. * This table contains as many values as there might be trailing bytes * in a UTF-8 sequence. */ static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL, 0x03C82080UL, 0xFA082080UL, 0x82082080UL }; /* * Utility routine to tell whether a sequence of bytes is legal UTF-8. * This must be called with the length pre-determined by the first byte. * If not calling this from ConvertUTF8to*, then the length can be set by: * length = trailingBytesForUTF8[*source]+1; * and the sequence is illegal right away if there aren't that many bytes * available. * If presented with a length > 4, this returns 0. The Unicode * definition of UTF-8 goes up to 4-byte sequences. */ static unsigned char isLegalUTF8(const UTF8 *source, int length) { UTF8 a; const UTF8 *srcptr = source+length; switch (length) { default: return 0; /* Everything else falls through when "1"... */ case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0; case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return 0; case 2: if ((a = (*--srcptr)) > 0xBF) return 0; switch (*source) { /* no fall-through in this inner switch */ case 0xE0: if (a < 0xA0) return 0; break; case 0xED: if (a > 0x9F) return 0; break; case 0xF0: if (a < 0x90) return 0; break; case 0xF4: if (a > 0x8F) return 0; break; default: if (a < 0x80) return 0; } case 1: if (*source >= 0x80 && *source < 0xC2) return 0; } if (*source > 0xF4) return 0; return 1; } /* Escapes the UTF16 character and stores the result in the buffer buf. */ static void unicode_escape(char *buf, UTF16 character) { const char *digits = "0123456789abcdef"; buf[2] = digits[character >> 12]; buf[3] = digits[(character >> 8) & 0xf]; buf[4] = digits[(character >> 4) & 0xf]; buf[5] = digits[character & 0xf]; } /* Escapes the UTF16 character and stores the result in the buffer buf, then * the buffer buf іs appended to the FBuffer buffer. */ static void unicode_escape_to_buffer(FBuffer *buffer, char buf[6], UTF16 character) { unicode_escape(buf, character); fbuffer_append(buffer, buf, 6); } /* Converts string to a JSON string in FBuffer buffer, where all but the ASCII * and control characters are JSON escaped. */ static void convert_UTF8_to_JSON_ASCII(FBuffer *buffer, VALUE string) { const UTF8 *source = (UTF8 *) RSTRING_PTR(string); const UTF8 *sourceEnd = source + RSTRING_LEN(string); char buf[6] = { '\\', 'u' }; while (source < sourceEnd) { UTF32 ch = 0; unsigned short extraBytesToRead = trailingBytesForUTF8[*source]; if (source + extraBytesToRead >= sourceEnd) { rb_raise(rb_path2class("JSON::GeneratorError"), "partial character in source, but hit end"); } if (!isLegalUTF8(source, extraBytesToRead+1)) { rb_raise(rb_path2class("JSON::GeneratorError"), "source sequence is illegal/malformed utf-8"); } /* * The cases all fall through. See "Note A" below. */ switch (extraBytesToRead) { case 5: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */ case 4: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */ case 3: ch += *source++; ch <<= 6; case 2: ch += *source++; ch <<= 6; case 1: ch += *source++; ch <<= 6; case 0: ch += *source++; } ch -= offsetsFromUTF8[extraBytesToRead]; if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */ /* UTF-16 surrogate values are illegal in UTF-32 */ if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) { #if UNI_STRICT_CONVERSION source -= (extraBytesToRead+1); /* return to the illegal value itself */ rb_raise(rb_path2class("JSON::GeneratorError"), "source sequence is illegal/malformed utf-8"); #else unicode_escape_to_buffer(buffer, buf, UNI_REPLACEMENT_CHAR); #endif } else { /* normal case */ if (ch >= 0x20 && ch <= 0x7f) { switch (ch) { case '\\': fbuffer_append(buffer, "\\\\", 2); break; case '"': fbuffer_append(buffer, "\\\"", 2); break; default: fbuffer_append_char(buffer, (char)ch); break; } } else { switch (ch) { case '\n': fbuffer_append(buffer, "\\n", 2); break; case '\r': fbuffer_append(buffer, "\\r", 2); break; case '\t': fbuffer_append(buffer, "\\t", 2); break; case '\f': fbuffer_append(buffer, "\\f", 2); break; case '\b': fbuffer_append(buffer, "\\b", 2); break; default: unicode_escape_to_buffer(buffer, buf, (UTF16) ch); break; } } } } else if (ch > UNI_MAX_UTF16) { #if UNI_STRICT_CONVERSION source -= (extraBytesToRead+1); /* return to the start */ rb_raise(rb_path2class("JSON::GeneratorError"), "source sequence is illegal/malformed utf8"); #else unicode_escape_to_buffer(buffer, buf, UNI_REPLACEMENT_CHAR); #endif } else { /* target is a character in range 0xFFFF - 0x10FFFF. */ ch -= halfBase; unicode_escape_to_buffer(buffer, buf, (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START)); unicode_escape_to_buffer(buffer, buf, (UTF16)((ch & halfMask) + UNI_SUR_LOW_START)); } } } /* Converts string to a JSON string in FBuffer buffer, where only the * characters required by the JSON standard are JSON escaped. The remaining * characters (should be UTF8) are just passed through and appended to the * result. */ static void convert_UTF8_to_JSON(FBuffer *buffer, VALUE string) { const char *ptr = RSTRING_PTR(string), *p; int len = RSTRING_LEN(string), start = 0, end = 0; const char *escape = NULL; int escape_len; unsigned char c; char buf[6] = { '\\', 'u' }; for (start = 0, end = 0; end < len;) { p = ptr + end; c = (unsigned char) *p; if (c < 0x20) { switch (c) { case '\n': escape = "\\n"; escape_len = 2; break; case '\r': escape = "\\r"; escape_len = 2; break; case '\t': escape = "\\t"; escape_len = 2; break; case '\f': escape = "\\f"; escape_len = 2; break; case '\b': escape = "\\b"; escape_len = 2; break; default: unicode_escape(buf, (UTF16) *p); escape = buf; escape_len = 6; break; } } else { switch (c) { case '\\': escape = "\\\\"; escape_len = 2; break; case '"': escape = "\\\""; escape_len = 2; break; default: end++; continue; break; } } fbuffer_append(buffer, ptr + start, end - start); fbuffer_append(buffer, escape, escape_len); start = ++end; escape = NULL; } fbuffer_append(buffer, ptr + start, end - start); } static char *fstrndup(const char *ptr, int len) { char *result; if (len <= 0) return NULL; result = ALLOC_N(char, len); memccpy(result, ptr, 0, len); return result; } /* fbuffer implementation */ static FBuffer *fbuffer_alloc() { FBuffer *fb = ALLOC(FBuffer); memset((void *) fb, 0, sizeof(FBuffer)); fb->initial_length = FBUFFER_INITIAL_LENGTH; return fb; } static FBuffer *fbuffer_alloc_with_length(unsigned int initial_length) { FBuffer *fb; assert(initial_length > 0); fb = ALLOC(FBuffer); memset((void *) fb, 0, sizeof(FBuffer)); fb->initial_length = initial_length; return fb; } static void fbuffer_free(FBuffer *fb) { if (fb->ptr) ruby_xfree(fb->ptr); ruby_xfree(fb); } static void fbuffer_clear(FBuffer *fb) { fb->len = 0; } static void fbuffer_inc_capa(FBuffer *fb, unsigned int requested) { unsigned int required; if (!fb->ptr) { fb->ptr = ALLOC_N(char, fb->initial_length); fb->capa = fb->initial_length; } for (required = fb->capa; requested > required - fb->len; required <<= 1); if (required > fb->capa) { REALLOC_N(fb->ptr, char, required); fb->capa = required; } } static void fbuffer_append(FBuffer *fb, const char *newstr, unsigned int len) { if (len > 0) { fbuffer_inc_capa(fb, len); MEMCPY(fb->ptr + fb->len, newstr, char, len); fb->len += len; } } static void fbuffer_append_char(FBuffer *fb, char newchr) { fbuffer_inc_capa(fb, 1); *(fb->ptr + fb->len) = newchr; fb->len++; } static void freverse(char *start, char *end) { char c; while (end > start) { c = *end, *end-- = *start, *start++ = c; } } static int fltoa(long number, char *buf) { static char digits[] = "0123456789"; long sign = number; char* tmp = buf; if (sign < 0) number = -number; do *tmp++ = digits[number % 10]; while (number /= 10); if (sign < 0) *tmp++ = '-'; freverse(buf, tmp - 1); return tmp - buf; } static void fbuffer_append_long(FBuffer *fb, long number) { char buf[20]; int len = fltoa(number, buf); fbuffer_append(fb, buf, len); } static FBuffer *fbuffer_dup(FBuffer *fb) { int len = fb->len; FBuffer *result; if (len > 0) { result = fbuffer_alloc_with_length(len); fbuffer_append(result, FBUFFER_PAIR(fb)); } else { result = fbuffer_alloc(); } return result; } /* * Document-module: JSON::Ext::Generator * * This is the JSON generator implemented as a C extension. It can be * configured to be used by setting * * JSON.generator = JSON::Ext::Generator * * with the method generator= in JSON. * */ /* * call-seq: to_json(state = nil, depth = 0) * * Returns a JSON string containing a JSON object, that is generated from * this Hash instance. * _state_ is a JSON::State object, that can also be used to configure the * produced JSON string output further. * _depth_ is used to find out nesting depth, to indent accordingly. */ static VALUE mHash_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: to_json(state = nil, depth = 0) * * Returns a JSON string containing a JSON array, that is generated from * this Array instance. * _state_ is a JSON::State object, that can also be used to configure the * produced JSON string output further. * _depth_ is used to find out nesting depth, to indent accordingly. */ static VALUE mArray_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: to_json(*) * * Returns a JSON string representation for this Integer number. */ static VALUE mInteger_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: to_json(*) * * Returns a JSON string representation for this Float number. */ static VALUE mFloat_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: String.included(modul) * * Extends _modul_ with the String::Extend module. */ static VALUE mString_included_s(VALUE self, VALUE modul) { VALUE result = rb_funcall(modul, i_extend, 1, mString_Extend); return result; } /* * call-seq: to_json(*) * * This string should be encoded with UTF-8 A call to this method * returns a JSON string encoded with UTF16 big endian characters as * \u????. */ static VALUE mString_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: to_json_raw_object() * * This method creates a raw object hash, that can be nested into * other data structures and will be generated as a raw string. This * method should be used, if you want to convert raw strings to JSON * instead of UTF-8 strings, e. g. binary data. */ static VALUE mString_to_json_raw_object(VALUE self) { VALUE ary; VALUE result = rb_hash_new(); rb_hash_aset(result, rb_funcall(mJSON, i_create_id, 0), rb_class_name(rb_obj_class(self))); ary = rb_funcall(self, i_unpack, 1, rb_str_new2("C*")); rb_hash_aset(result, rb_str_new2("raw"), ary); return result; } /* * call-seq: to_json_raw(*args) * * This method creates a JSON text from the result of a call to * to_json_raw_object of this String. */ static VALUE mString_to_json_raw(int argc, VALUE *argv, VALUE self) { VALUE obj = mString_to_json_raw_object(self); Check_Type(obj, T_HASH); return mHash_to_json(argc, argv, obj); } /* * call-seq: json_create(o) * * Raw Strings are JSON Objects (the raw bytes are stored in an array for the * key "raw"). The Ruby String can be created by this module method. */ static VALUE mString_Extend_json_create(VALUE self, VALUE o) { VALUE ary; Check_Type(o, T_HASH); ary = rb_hash_aref(o, rb_str_new2("raw")); return rb_funcall(ary, i_pack, 1, rb_str_new2("C*")); } /* * call-seq: to_json(*) * * Returns a JSON string for true: 'true'. */ static VALUE mTrueClass_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: to_json(*) * * Returns a JSON string for false: 'false'. */ static VALUE mFalseClass_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: to_json(*) * */ static VALUE mNilClass_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; rb_scan_args(argc, argv, "02", &state, &depth); state = cState_from_state_s(cState, state); return cState_partial_generate(state, self, depth); } /* * call-seq: to_json(*) * * Converts this object to a string (calling #to_s), converts * it to a JSON string, and returns the result. This is a fallback, if no * special method #to_json was defined for some object. */ static VALUE mObject_to_json(int argc, VALUE *argv, VALUE self) { VALUE state, depth; VALUE string = rb_funcall(self, i_to_s, 0); rb_scan_args(argc, argv, "02", &state, &depth); Check_Type(string, T_STRING); state = cState_from_state_s(cState, state); return cState_partial_generate(state, string, depth); } static void State_free(JSON_Generator_State *state) { if (state->indent) ruby_xfree(state->indent); if (state->space) ruby_xfree(state->space); if (state->space_before) ruby_xfree(state->space_before); if (state->object_nl) ruby_xfree(state->object_nl); if (state->array_nl) ruby_xfree(state->array_nl); if (state->array_delim) fbuffer_free(state->array_delim); if (state->object_delim) fbuffer_free(state->object_delim); if (state->object_delim2) fbuffer_free(state->object_delim2); ruby_xfree(state); } static JSON_Generator_State *State_allocate() { JSON_Generator_State *state = ALLOC(JSON_Generator_State); return state; } static VALUE cState_s_allocate(VALUE klass) { JSON_Generator_State *state = State_allocate(); return Data_Wrap_Struct(klass, NULL, State_free, state); } /* * call-seq: configure(opts) * * Configure this State instance with the Hash _opts_, and return * itself. */ static VALUE cState_configure(VALUE self, VALUE opts) { VALUE tmp; GET_STATE(self); tmp = rb_convert_type(opts, T_HASH, "Hash", "to_hash"); if (NIL_P(tmp)) tmp = rb_convert_type(opts, T_HASH, "Hash", "to_h"); if (NIL_P(tmp)) { rb_raise(rb_eArgError, "opts has to be hash like or convertable into a hash"); } opts = tmp; tmp = rb_hash_aref(opts, ID2SYM(i_indent)); if (RTEST(tmp)) { int len; Check_Type(tmp, T_STRING); len = RSTRING_LEN(tmp); state->indent = fstrndup(RSTRING_PTR(tmp), len); state->indent_len = len; } tmp = rb_hash_aref(opts, ID2SYM(i_space)); if (RTEST(tmp)) { int len; Check_Type(tmp, T_STRING); len = RSTRING_LEN(tmp); state->space = fstrndup(RSTRING_PTR(tmp), len); state->space_len = len; } tmp = rb_hash_aref(opts, ID2SYM(i_space_before)); if (RTEST(tmp)) { int len; Check_Type(tmp, T_STRING); len = RSTRING_LEN(tmp); state->space_before = fstrndup(RSTRING_PTR(tmp), len); state->space_before_len = len; } tmp = rb_hash_aref(opts, ID2SYM(i_array_nl)); if (RTEST(tmp)) { int len; Check_Type(tmp, T_STRING); len = RSTRING_LEN(tmp); state->array_nl = fstrndup(RSTRING_PTR(tmp), len); state->array_nl_len = len; } tmp = rb_hash_aref(opts, ID2SYM(i_object_nl)); if (RTEST(tmp)) { int len; Check_Type(tmp, T_STRING); len = RSTRING_LEN(tmp); state->object_nl = fstrndup(RSTRING_PTR(tmp), len); state->object_nl_len = len; } tmp = ID2SYM(i_max_nesting); state->max_nesting = 19; if (option_given_p(opts, tmp)) { VALUE max_nesting = rb_hash_aref(opts, tmp); if (RTEST(max_nesting)) { Check_Type(max_nesting, T_FIXNUM); state->max_nesting = FIX2LONG(max_nesting); } else { state->max_nesting = 0; } } tmp = rb_hash_aref(opts, ID2SYM(i_allow_nan)); state->allow_nan = RTEST(tmp); tmp = rb_hash_aref(opts, ID2SYM(i_ascii_only)); state->ascii_only = RTEST(tmp); return self; } /* * call-seq: to_h * * Returns the configuration instance variables as a hash, that can be * passed to the configure method. */ static VALUE cState_to_h(VALUE self) { VALUE result = rb_hash_new(); GET_STATE(self); rb_hash_aset(result, ID2SYM(i_indent), rb_str_new(state->indent, state->indent_len)); rb_hash_aset(result, ID2SYM(i_space), rb_str_new(state->space, state->space_len)); rb_hash_aset(result, ID2SYM(i_space_before), rb_str_new(state->space_before, state->space_before_len)); rb_hash_aset(result, ID2SYM(i_object_nl), rb_str_new(state->object_nl, state->object_nl_len)); rb_hash_aset(result, ID2SYM(i_array_nl), rb_str_new(state->array_nl, state->array_nl_len)); rb_hash_aset(result, ID2SYM(i_allow_nan), state->allow_nan ? Qtrue : Qfalse); rb_hash_aset(result, ID2SYM(i_ascii_only), state->ascii_only ? Qtrue : Qfalse); rb_hash_aset(result, ID2SYM(i_max_nesting), LONG2FIX(state->max_nesting)); return result; } /* * call-seq: [](name) * * Return the value returned by method +name+. */ static VALUE cState_aref(VALUE self, VALUE name) { GET_STATE(self); if (RTEST(rb_funcall(self, i_respond_to_p, 1, name))) { return rb_funcall(self, i_send, 1, name); } else { return Qnil; } } static void generate_json(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *state, VALUE obj, long depth) { VALUE tmp; switch (TYPE(obj)) { case T_HASH: { char *object_nl = state->object_nl; long object_nl_len = state->object_nl_len; char *indent = state->indent; long indent_len = state->indent_len; long max_nesting = state->max_nesting; char *delim = FBUFFER_PTR(state->object_delim); long delim_len = FBUFFER_LEN(state->object_delim); char *delim2 = FBUFFER_PTR(state->object_delim2); long delim2_len = FBUFFER_LEN(state->object_delim2); int i, j; VALUE key, key_to_s, keys; depth++; if (max_nesting != 0 && depth > max_nesting) { fbuffer_free(buffer); rb_raise(eNestingError, "nesting of %ld is too deep", depth); } fbuffer_append_char(buffer, '{'); keys = rb_funcall(obj, rb_intern("keys"), 0); for(i = 0; i < RARRAY_LEN(keys); i++) { if (i > 0) fbuffer_append(buffer, delim, delim_len); if (object_nl) { fbuffer_append(buffer, object_nl, object_nl_len); } if (indent) { for (j = 0; j < depth; j++) { fbuffer_append(buffer, indent, indent_len); } } key = rb_ary_entry(keys, i); key_to_s = rb_funcall(key, i_to_s, 0); Check_Type(key_to_s, T_STRING); generate_json(buffer, Vstate, state, key_to_s, depth); fbuffer_append(buffer, delim2, delim2_len); generate_json(buffer, Vstate, state, rb_hash_aref(obj, key), depth); } depth--; if (object_nl) { fbuffer_append(buffer, object_nl, object_nl_len); if (indent) { for (j = 0; j < depth; j++) { fbuffer_append(buffer, indent, indent_len); } } } fbuffer_append_char(buffer, '}'); } break; case T_ARRAY: { char *array_nl = state->array_nl; long array_nl_len = state->array_nl_len; char *indent = state->indent; long indent_len = state->indent_len; long max_nesting = state->max_nesting; char *delim = FBUFFER_PTR(state->array_delim); long delim_len = FBUFFER_LEN(state->array_delim); int i, j; depth++; if (max_nesting != 0 && depth > max_nesting) { fbuffer_free(buffer); rb_raise(eNestingError, "nesting of %ld is too deep", depth); } fbuffer_append_char(buffer, '['); if (array_nl) fbuffer_append(buffer, array_nl, array_nl_len); for(i = 0; i < RARRAY_LEN(obj); i++) { if (i > 0) fbuffer_append(buffer, delim, delim_len); if (indent) { for (j = 0; j < depth; j++) { fbuffer_append(buffer, indent, indent_len); } } generate_json(buffer, Vstate, state, rb_ary_entry(obj, i), depth); } depth--; if (array_nl) { fbuffer_append(buffer, array_nl, array_nl_len); if (indent) { for (j = 0; j < depth; j++) { fbuffer_append(buffer, indent, indent_len); } } } fbuffer_append_char(buffer, ']'); } break; case T_STRING: fbuffer_append_char(buffer, '"'); #ifdef HAVE_RUBY_ENCODING_H obj = rb_funcall(obj, i_encode, 1, CEncoding_UTF_8); #endif if (state->ascii_only) { convert_UTF8_to_JSON_ASCII(buffer, obj); } else { convert_UTF8_to_JSON(buffer, obj); } fbuffer_append_char(buffer, '"'); break; case T_NIL: fbuffer_append(buffer, "null", 4); break; case T_FALSE: fbuffer_append(buffer, "false", 5); break; case T_TRUE: fbuffer_append(buffer, "true", 4); break; case T_FIXNUM: fbuffer_append_long(buffer, FIX2LONG(obj)); break; case T_BIGNUM: tmp = rb_funcall(obj, i_to_s, 0); fbuffer_append(buffer, RSTRING_PAIR(tmp)); break; case T_FLOAT: { double value = RFLOAT_VALUE(obj); char allow_nan = state->allow_nan; tmp = rb_funcall(obj, i_to_s, 0); if (!allow_nan) { if (isinf(value)) { fbuffer_free(buffer); rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp)); } else if (isnan(value)) { fbuffer_free(buffer); rb_raise(eGeneratorError, "%u: %s not allowed in JSON", __LINE__, StringValueCStr(tmp)); } } fbuffer_append(buffer, RSTRING_PAIR(tmp)); } break; default: if (rb_respond_to(obj, i_to_json)) { tmp = rb_funcall(obj, i_to_json, 2, Vstate, INT2FIX(depth + 1)); Check_Type(tmp, T_STRING); fbuffer_append(buffer, RSTRING_PAIR(tmp)); } else { tmp = rb_funcall(obj, i_to_s, 0); Check_Type(tmp, T_STRING); generate_json(buffer, Vstate, state, tmp, depth + 1); } break; } } /* * call-seq: partial_generate(obj) * * Generates a part of a JSON document from object +obj+ and returns the * result. */ static VALUE cState_partial_generate(VALUE self, VALUE obj, VALUE depth) { VALUE result; FBuffer *buffer = fbuffer_alloc(); GET_STATE(self); if (state->object_delim) { fbuffer_clear(state->object_delim); } else { state->object_delim = fbuffer_alloc_with_length(16); } fbuffer_append_char(state->object_delim, ','); if (state->object_delim2) { fbuffer_clear(state->object_delim2); } else { state->object_delim2 = fbuffer_alloc_with_length(16); } fbuffer_append_char(state->object_delim2, ':'); if (state->space) fbuffer_append(state->object_delim2, state->space, state->space_len); if (state->array_delim) { fbuffer_clear(state->array_delim); } else { state->array_delim = fbuffer_alloc_with_length(16); } fbuffer_append_char(state->array_delim, ','); if (state->array_nl) fbuffer_append(state->array_delim, state->array_nl, state->array_nl_len); generate_json(buffer, self, state, obj, NIL_P(depth) ? 0 : FIX2INT(depth)); result = rb_str_new(FBUFFER_PAIR(buffer)); fbuffer_free(buffer); FORCE_UTF8(result); return result; } /* * call-seq: generate(obj) * * Generates a valid JSON document from object +obj+ and returns the * result. If no valid JSON document can be created this method raises a * GeneratorError exception. */ static VALUE cState_generate(VALUE self, VALUE obj) { VALUE result = cState_partial_generate(self, obj, Qnil); VALUE re, args[2]; args[0] = rb_str_new2("\\A\\s*(?:\\[.*\\]|\\{.*\\})\\s*\\Z"); args[1] = CRegexp_MULTILINE; re = rb_class_new_instance(2, args, rb_cRegexp); if (NIL_P(rb_funcall(re, i_match, 1, result))) { rb_raise(eGeneratorError, "only generation of JSON objects or arrays allowed"); } return result; } /* * call-seq: new(opts = {}) * * Instantiates a new State object, configured by _opts_. * * _opts_ can have the following keys: * * * *indent*: a string used to indent levels (default: ''), * * *space*: a string that is put after, a : or , delimiter (default: ''), * * *space_before*: a string that is put before a : pair delimiter (default: ''), * * *object_nl*: a string that is put at the end of a JSON object (default: ''), * * *array_nl*: a string that is put at the end of a JSON array (default: ''), * * *allow_nan*: true if NaN, Infinity, and -Infinity should be * generated, otherwise an exception is thrown, if these values are * encountered. This options defaults to false. */ static VALUE cState_initialize(int argc, VALUE *argv, VALUE self) { VALUE opts; GET_STATE(self); MEMZERO(state, JSON_Generator_State, 1); state->max_nesting = 19; rb_scan_args(argc, argv, "01", &opts); if (!NIL_P(opts)) cState_configure(self, opts); return self; } /* * call-seq: initialize_copy(orig) * * Initializes this object from orig if it to be duplicated/cloned and returns * it. */ static VALUE cState_init_copy(VALUE obj, VALUE orig) { JSON_Generator_State *objState, *origState; Data_Get_Struct(obj, JSON_Generator_State, objState); Data_Get_Struct(orig, JSON_Generator_State, origState); if (!objState) rb_raise(rb_eArgError, "unallocated JSON::State"); MEMCPY(objState, origState, JSON_Generator_State, 1); objState->indent = fstrndup(origState->indent, origState->indent_len); objState->space = fstrndup(origState->space, origState->space_len); objState->space_before = fstrndup(origState->space_before, origState->space_before_len); objState->object_nl = fstrndup(origState->object_nl, origState->object_nl_len); objState->array_nl = fstrndup(origState->array_nl, origState->array_nl_len); if (origState->array_delim) objState->array_delim = fbuffer_dup(origState->array_delim); if (origState->object_delim) objState->object_delim = fbuffer_dup(origState->object_delim); if (origState->object_delim2) objState->object_delim2 = fbuffer_dup(origState->object_delim2); return obj; } /* * call-seq: from_state(opts) * * Creates a State object from _opts_, which ought to be Hash to create a * new State instance configured by _opts_, something else to create an * unconfigured instance. If _opts_ is a State object, it is just returned. */ static VALUE cState_from_state_s(VALUE self, VALUE opts) { if (rb_obj_is_kind_of(opts, self)) { return opts; } else if (rb_obj_is_kind_of(opts, rb_cHash)) { return rb_funcall(self, i_new, 1, opts); } else { if (NIL_P(CJSON_SAFE_STATE_PROTOTYPE)) { CJSON_SAFE_STATE_PROTOTYPE = rb_const_get(mJSON, rb_intern("SAFE_STATE_PROTOTYPE")); } return CJSON_SAFE_STATE_PROTOTYPE; } } /* * call-seq: indent() * * This string is used to indent levels in the JSON text. */ static VALUE cState_indent(VALUE self) { GET_STATE(self); return state->indent ? rb_str_new2(state->indent) : rb_str_new2(""); } /* * call-seq: indent=(indent) * * This string is used to indent levels in the JSON text. */ static VALUE cState_indent_set(VALUE self, VALUE indent) { GET_STATE(self); Check_Type(indent, T_STRING); if (RSTRING_LEN(indent) == 0) { if (state->indent) { ruby_xfree(state->indent); state->indent = NULL; } } else { if (state->indent) ruby_xfree(state->indent); state->indent = strdup(RSTRING_PTR(indent)); } return Qnil; } /* * call-seq: space() * * This string is used to insert a space between the tokens in a JSON * string. */ static VALUE cState_space(VALUE self) { GET_STATE(self); return state->space ? rb_str_new2(state->space) : rb_str_new2(""); } /* * call-seq: space=(space) * * This string is used to insert a space between the tokens in a JSON * string. */ static VALUE cState_space_set(VALUE self, VALUE space) { GET_STATE(self); Check_Type(space, T_STRING); if (RSTRING_LEN(space) == 0) { if (state->space) { ruby_xfree(state->space); state->space = NULL; } } else { if (state->space) ruby_xfree(state->space); state->space = strdup(RSTRING_PTR(space)); } return Qnil; } /* * call-seq: space_before() * * This string is used to insert a space before the ':' in JSON objects. */ static VALUE cState_space_before(VALUE self) { GET_STATE(self); return state->space_before ? rb_str_new2(state->space_before) : rb_str_new2(""); } /* * call-seq: space_before=(space_before) * * This string is used to insert a space before the ':' in JSON objects. */ static VALUE cState_space_before_set(VALUE self, VALUE space_before) { GET_STATE(self); Check_Type(space_before, T_STRING); if (RSTRING_LEN(space_before) == 0) { if (state->space_before) { ruby_xfree(state->space_before); state->space_before = NULL; } } else { if (state->space_before) ruby_xfree(state->space_before); state->space_before = strdup(RSTRING_PTR(space_before)); } return Qnil; } /* * call-seq: object_nl() * * This string is put at the end of a line that holds a JSON object (or * Hash). */ static VALUE cState_object_nl(VALUE self) { GET_STATE(self); return state->object_nl ? rb_str_new2(state->object_nl) : rb_str_new2(""); } /* * call-seq: object_nl=(object_nl) * * This string is put at the end of a line that holds a JSON object (or * Hash). */ static VALUE cState_object_nl_set(VALUE self, VALUE object_nl) { GET_STATE(self); Check_Type(object_nl, T_STRING); if (RSTRING_LEN(object_nl) == 0) { if (state->object_nl) { ruby_xfree(state->object_nl); state->object_nl = NULL; } } else { if (state->object_nl) ruby_xfree(state->object_nl); state->object_nl = strdup(RSTRING_PTR(object_nl)); } return Qnil; } /* * call-seq: array_nl() * * This string is put at the end of a line that holds a JSON array. */ static VALUE cState_array_nl(VALUE self) { GET_STATE(self); return state->array_nl ? rb_str_new2(state->array_nl) : rb_str_new2(""); } /* * call-seq: array_nl=(array_nl) * * This string is put at the end of a line that holds a JSON array. */ static VALUE cState_array_nl_set(VALUE self, VALUE array_nl) { GET_STATE(self); Check_Type(array_nl, T_STRING); if (RSTRING_LEN(array_nl) == 0) { if (state->array_nl) { ruby_xfree(state->array_nl); state->array_nl = NULL; } } else { if (state->array_nl) ruby_xfree(state->array_nl); state->array_nl = strdup(RSTRING_PTR(array_nl)); } return Qnil; } /* * call-seq: check_circular? * * Returns true, if circular data structures should be checked, * otherwise returns false. */ static VALUE cState_check_circular_p(VALUE self) { GET_STATE(self); return state->max_nesting ? Qtrue : Qfalse; } /* * call-seq: max_nesting * * This integer returns the maximum level of data structure nesting in * the generated JSON, max_nesting = 0 if no maximum is checked. */ static VALUE cState_max_nesting(VALUE self) { GET_STATE(self); return LONG2FIX(state->max_nesting); } /* * call-seq: max_nesting=(depth) * * This sets the maximum level of data structure nesting in the generated JSON * to the integer depth, max_nesting = 0 if no maximum should be checked. */ static VALUE cState_max_nesting_set(VALUE self, VALUE depth) { GET_STATE(self); Check_Type(depth, T_FIXNUM); return state->max_nesting = FIX2LONG(depth); } /* * call-seq: allow_nan? * * Returns true, if NaN, Infinity, and -Infinity should be generated, otherwise * returns false. */ static VALUE cState_allow_nan_p(VALUE self) { GET_STATE(self); return state->allow_nan ? Qtrue : Qfalse; } /* * call-seq: ascii_only? * * Returns true, if NaN, Infinity, and -Infinity should be generated, otherwise * returns false. */ static VALUE cState_ascii_only_p(VALUE self) { GET_STATE(self); return state->ascii_only ? Qtrue : Qfalse; } /* * */ void Init_generator() { rb_require("json/common"); mJSON = rb_define_module("JSON"); mExt = rb_define_module_under(mJSON, "Ext"); mGenerator = rb_define_module_under(mExt, "Generator"); eGeneratorError = rb_path2class("JSON::GeneratorError"); eNestingError = rb_path2class("JSON::NestingError"); cState = rb_define_class_under(mGenerator, "State", rb_cObject); rb_define_alloc_func(cState, cState_s_allocate); rb_define_singleton_method(cState, "from_state", cState_from_state_s, 1); rb_define_method(cState, "initialize", cState_initialize, -1); rb_define_method(cState, "initialize_copy", cState_init_copy, 1); rb_define_method(cState, "indent", cState_indent, 0); rb_define_method(cState, "indent=", cState_indent_set, 1); rb_define_method(cState, "space", cState_space, 0); rb_define_method(cState, "space=", cState_space_set, 1); rb_define_method(cState, "space_before", cState_space_before, 0); rb_define_method(cState, "space_before=", cState_space_before_set, 1); rb_define_method(cState, "object_nl", cState_object_nl, 0); rb_define_method(cState, "object_nl=", cState_object_nl_set, 1); rb_define_method(cState, "array_nl", cState_array_nl, 0); rb_define_method(cState, "array_nl=", cState_array_nl_set, 1); rb_define_method(cState, "max_nesting", cState_max_nesting, 0); rb_define_method(cState, "max_nesting=", cState_max_nesting_set, 1); rb_define_method(cState, "check_circular?", cState_check_circular_p, 0); rb_define_method(cState, "allow_nan?", cState_allow_nan_p, 0); rb_define_method(cState, "ascii_only?", cState_ascii_only_p, 0); rb_define_method(cState, "configure", cState_configure, 1); rb_define_method(cState, "to_h", cState_to_h, 0); rb_define_method(cState, "[]", cState_aref, 1); rb_define_method(cState, "generate", cState_generate, 1); rb_define_method(cState, "partial_generate", cState_partial_generate, 1); mGeneratorMethods = rb_define_module_under(mGenerator, "GeneratorMethods"); mObject = rb_define_module_under(mGeneratorMethods, "Object"); rb_define_method(mObject, "to_json", mObject_to_json, -1); mHash = rb_define_module_under(mGeneratorMethods, "Hash"); rb_define_method(mHash, "to_json", mHash_to_json, -1); mArray = rb_define_module_under(mGeneratorMethods, "Array"); rb_define_method(mArray, "to_json", mArray_to_json, -1); mInteger = rb_define_module_under(mGeneratorMethods, "Integer"); rb_define_method(mInteger, "to_json", mInteger_to_json, -1); mFloat = rb_define_module_under(mGeneratorMethods, "Float"); rb_define_method(mFloat, "to_json", mFloat_to_json, -1); mString = rb_define_module_under(mGeneratorMethods, "String"); rb_define_singleton_method(mString, "included", mString_included_s, 1); rb_define_method(mString, "to_json", mString_to_json, -1); rb_define_method(mString, "to_json_raw", mString_to_json_raw, -1); rb_define_method(mString, "to_json_raw_object", mString_to_json_raw_object, 0); mString_Extend = rb_define_module_under(mString, "Extend"); rb_define_method(mString_Extend, "json_create", mString_Extend_json_create, 1); mTrueClass = rb_define_module_under(mGeneratorMethods, "TrueClass"); rb_define_method(mTrueClass, "to_json", mTrueClass_to_json, -1); mFalseClass = rb_define_module_under(mGeneratorMethods, "FalseClass"); rb_define_method(mFalseClass, "to_json", mFalseClass_to_json, -1); mNilClass = rb_define_module_under(mGeneratorMethods, "NilClass"); rb_define_method(mNilClass, "to_json", mNilClass_to_json, -1); CRegexp_MULTILINE = rb_const_get(rb_cRegexp, rb_intern("MULTILINE")); i_to_s = rb_intern("to_s"); i_to_json = rb_intern("to_json"); i_new = rb_intern("new"); i_indent = rb_intern("indent"); i_space = rb_intern("space"); i_space_before = rb_intern("space_before"); i_object_nl = rb_intern("object_nl"); i_array_nl = rb_intern("array_nl"); i_max_nesting = rb_intern("max_nesting"); i_allow_nan = rb_intern("allow_nan"); i_ascii_only = rb_intern("ascii_only"); i_pack = rb_intern("pack"); i_unpack = rb_intern("unpack"); i_create_id = rb_intern("create_id"); i_extend = rb_intern("extend"); i_key_p = rb_intern("key?"); i_aref = rb_intern("[]"); i_send = rb_intern("__send__"); i_respond_to_p = rb_intern("respond_to?"); i_match = rb_intern("match"); #ifdef HAVE_RUBY_ENCODING_H CEncoding_UTF_8 = rb_funcall(rb_path2class("Encoding"), rb_intern("find"), 1, rb_str_new2("utf-8")); i_encoding = rb_intern("encoding"); i_encode = rb_intern("encode"); #endif CJSON_SAFE_STATE_PROTOTYPE = Qnil; }