diff options
Diffstat (limited to 'ext/misc/json1.c')
| -rw-r--r-- | ext/misc/json1.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/ext/misc/json1.c b/ext/misc/json1.c index 61c52ebe6..839e133bf 100644 --- a/ext/misc/json1.c +++ b/ext/misc/json1.c @@ -49,13 +49,15 @@ SQLITE_EXTENSION_INIT1 #ifdef sqlite3Isdigit /* Use the SQLite core versions if this routine is part of the ** SQLite amalgamation */ -# define safe_isdigit(x) sqlite3Isdigit(x) -# define safe_isalnum(x) sqlite3Isalnum(x) +# define safe_isdigit(x) sqlite3Isdigit(x) +# define safe_isalnum(x) sqlite3Isalnum(x) +# define safe_isxdigit(x) sqlite3Isxdigit(x) #else /* Use the standard library for separate compilation */ #include <ctype.h> /* amalgamator: keep */ -# define safe_isdigit(x) isdigit((unsigned char)(x)) -# define safe_isalnum(x) isalnum((unsigned char)(x)) +# define safe_isdigit(x) isdigit((unsigned char)(x)) +# define safe_isalnum(x) isalnum((unsigned char)(x)) +# define safe_isxdigit(x) isxdigit((unsigned char)(x)) #endif /* @@ -703,6 +705,15 @@ static int jsonParseAddNode( } /* +** Return true if z[] begins with 4 (or more) hexadecimal digits +*/ +static int jsonIs4Hex(const char *z){ + int i; + for(i=0; i<4; i++) if( !safe_isxdigit(z[i]) ) return 0; + return 1; +} + +/* ** Parse a single JSON value which begins at pParse->zJson[i]. Return the ** index of the first character past the end of the value parsed. ** @@ -776,8 +787,13 @@ static int jsonParseValue(JsonParse *pParse, u32 i){ if( c==0 ) return -1; if( c=='\\' ){ c = pParse->zJson[++j]; - if( c==0 ) return -1; - jnFlags = JNODE_ESCAPE; + if( c=='"' || c=='\\' || c=='/' || c=='b' || c=='f' + || c=='n' || c=='r' || c=='t' + || (c=='u' && jsonIs4Hex(pParse->zJson+j+1)) ){ + jnFlags = JNODE_ESCAPE; + }else{ + return -1; + } }else if( c=='"' ){ break; } |