--- /dev/null
+/*
+ * Copyright 2007-2009, Lloyd Hilaiel.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. Neither the name of Lloyd Hilaiel nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __YAJL_LEX_H__
+#define __YAJL_LEX_H__
+
+#include "yajl/yajl_common.h"
+
+typedef enum {
+ yajl_tok_bool,
+ yajl_tok_colon,
+ yajl_tok_comma,
+ yajl_tok_eof,
+ yajl_tok_error,
+ yajl_tok_left_brace,
+ yajl_tok_left_bracket,
+ yajl_tok_null,
+ yajl_tok_right_brace,
+ yajl_tok_right_bracket,
+
+ /* we differentiate between integers and doubles to allow the
+ * parser to interpret the number without re-scanning */
+ yajl_tok_integer,
+ yajl_tok_double,
+
+ /* we differentiate between strings which require further processing,
+ * and strings that do not */
+ yajl_tok_string,
+ yajl_tok_string_with_escapes,
+
+ /* comment tokens are not currently returned to the parser, ever */
+ yajl_tok_comment
+} yajl_tok;
+
+typedef struct yajl_lexer_t * yajl_lexer;
+
+yajl_lexer yajl_lex_alloc(yajl_alloc_funcs * alloc,
+ unsigned int allowComments,
+ unsigned int validateUTF8);
+
+void yajl_lex_free(yajl_lexer lexer);
+
+/**
+ * run/continue a lex. "offset" is an input/output parameter.
+ * It should be initialized to zero for a
+ * new chunk of target text, and upon subsetquent calls with the same
+ * target text should passed with the value of the previous invocation.
+ *
+ * the client may be interested in the value of offset when an error is
+ * returned from the lexer. This allows the client to render useful
+n * error messages.
+ *
+ * When you pass the next chunk of data, context should be reinitialized
+ * to zero.
+ *
+ * Finally, the output buffer is usually just a pointer into the jsonText,
+ * however in cases where the entity being lexed spans multiple chunks,
+ * the lexer will buffer the entity and the data returned will be
+ * a pointer into that buffer.
+ *
+ * This behavior is abstracted from client code except for the performance
+ * implications which require that the client choose a reasonable chunk
+ * size to get adequate performance.
+ */
+yajl_tok yajl_lex_lex(yajl_lexer lexer, const unsigned char * jsonText,
+ unsigned int jsonTextLen, unsigned int * offset,
+ const unsigned char ** outBuf, unsigned int * outLen);
+
+/** have a peek at the next token, but don't move the lexer forward */
+yajl_tok yajl_lex_peek(yajl_lexer lexer, const unsigned char * jsonText,
+ unsigned int jsonTextLen, unsigned int offset);
+
+
+typedef enum {
+ yajl_lex_e_ok = 0,
+ yajl_lex_string_invalid_utf8,
+ yajl_lex_string_invalid_escaped_char,
+ yajl_lex_string_invalid_json_char,
+ yajl_lex_string_invalid_hex_char,
+ yajl_lex_invalid_char,
+ yajl_lex_invalid_string,
+ yajl_lex_missing_integer_after_decimal,
+ yajl_lex_missing_integer_after_exponent,
+ yajl_lex_missing_integer_after_minus,
+ yajl_lex_unallowed_comment
+} yajl_lex_error;
+
+const char * yajl_lex_error_to_string(yajl_lex_error error);
+
+/** allows access to more specific information about the lexical
+ * error when yajl_lex_lex returns yajl_tok_error. */
+yajl_lex_error yajl_lex_get_error(yajl_lexer lexer);
+
+/** get the current offset into the most recently lexed json string. */
+unsigned int yajl_lex_current_offset(yajl_lexer lexer);
+
+/** get the number of lines lexed by this lexer instance */
+unsigned int yajl_lex_current_line(yajl_lexer lexer);
+
+/** get the number of chars lexed by this lexer instance since the last
+ * \n or \r */
+unsigned int yajl_lex_current_char(yajl_lexer lexer);
+
+#endif
projects / chaz / yoink / blobdiff