diff options
Diffstat (limited to 'src/include/common/jsonapi.h')
| -rw-r--r-- | src/include/common/jsonapi.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/include/common/jsonapi.h b/src/include/common/jsonapi.h index 86a0fc2d001..f1ab17fc9f2 100644 --- a/src/include/common/jsonapi.h +++ b/src/include/common/jsonapi.h @@ -36,6 +36,9 @@ typedef enum JsonTokenType typedef enum JsonParseErrorType { JSON_SUCCESS, + JSON_INCOMPLETE, + JSON_INVALID_LEXER_TYPE, + JSON_NESTING_TOO_DEEP, JSON_ESCAPING_INVALID, JSON_ESCAPING_REQUIRED, JSON_EXPECTED_ARRAY_FIRST, @@ -57,6 +60,9 @@ typedef enum JsonParseErrorType JSON_SEM_ACTION_FAILED, /* error should already be reported */ } JsonParseErrorType; +/* Parser state private to jsonapi.c */ +typedef struct JsonParserStack JsonParserStack; +typedef struct JsonIncrementalState JsonIncrementalState; /* * All the fields in this structure should be treated as read-only. @@ -71,6 +77,11 @@ typedef enum JsonParseErrorType * AFTER the end of the token, i.e. where there would be a nul byte * if we were using nul-terminated strings. * + * The prev_token_terminator field should not be used when incremental is + * true, as the previous token might have started in a previous piece of input, + * and thus it can't be used in any pointer arithmetic or other operations in + * conjunction with token_start. + * * JSONLEX_FREE_STRUCT/STRVAL are used to drive freeJsonLexContext. */ #define JSONLEX_FREE_STRUCT (1 << 0) @@ -83,11 +94,14 @@ typedef struct JsonLexContext char *token_start; char *token_terminator; char *prev_token_terminator; + bool incremental; JsonTokenType token_type; int lex_level; bits32 flags; int line_number; /* line number, starting from 1 */ char *line_start; /* where that line starts within input */ + JsonParserStack *pstack; + JsonIncrementalState *inc_state; StringInfo strval; StringInfo errormsg; } JsonLexContext; @@ -141,6 +155,12 @@ typedef struct JsonSemAction extern JsonParseErrorType pg_parse_json(JsonLexContext *lex, JsonSemAction *sem); +extern JsonParseErrorType pg_parse_json_incremental(JsonLexContext *lex, + JsonSemAction *sem, + char *json, + int len, + bool is_last); + /* the null action object used for pure validation */ extern PGDLLIMPORT JsonSemAction nullSemAction; @@ -176,6 +196,16 @@ extern JsonLexContext *makeJsonLexContextCstringLen(JsonLexContext *lex, int len, int encoding, bool need_escapes); + +/* + * make a JsonLexContext suitable for incremental parsing. + * the string chunks will be handed to pg_parse_json_incremental, + * so there's no need for them here. + */ +extern JsonLexContext *makeJsonLexContextIncremental(JsonLexContext *lex, + int encoding, + bool need_escapes); + extern void freeJsonLexContext(JsonLexContext *lex); /* lex one token */ |