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Fix shared tsvector/tsquery input code so that we don't say "syntax error in

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tsvector" when we are really parsing a tsquery.  Report the bogus input,
too.  Make styles of some related error messages more consistent.
This commit is contained in:
Tom Lane
2007-10-21 22:29:56 +00:00
parent dfc6f130b4
commit 1ea47dd8cb
4 changed files with 81 additions and 68 deletions
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115
src/backend/utils/adt/tsvector_parser.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/tsvector_parser.c,v 1.1 2007/09/07 15:09:56 teodor Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/tsvector_parser.c,v 1.2 2007/10/21 22:29:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,35 +20,49 @@
#include "tsearch/ts_utils.h"
#include "utils/memutils.h"
/*
* Private state of tsvector parser. Note that tsquery also uses this code to
* parse its input, hence the boolean flags. The two flags are both true or
* both false in current usage, but we keep them separate for clarity.
* is_tsquery affects *only* the content of error messages.
*/
struct TSVectorParseStateData
{
char *prsbuf;
char *word; /* buffer to hold the current word */
int len; /* size in bytes allocated for 'word' */
bool oprisdelim;
char *prsbuf; /* next input character */
char *bufstart; /* whole string (used only for errors) */
char *word; /* buffer to hold the current word */
int len; /* size in bytes allocated for 'word' */
int eml; /* max bytes per character */
bool oprisdelim; /* treat ! | * ( ) as delimiters? */
bool is_tsquery; /* say "tsquery" not "tsvector" in errors? */
};
/*
* Initializes parser for the input string. If oprisdelim is set, the
* following characters are treated as delimiters in addition to whitespace:
* ! | & ( )
*/
TSVectorParseState
init_tsvector_parser(char *input, bool oprisdelim)
init_tsvector_parser(char *input, bool oprisdelim, bool is_tsquery)
{
TSVectorParseState state;
state = (TSVectorParseState) palloc(sizeof(struct TSVectorParseStateData));
state->prsbuf = input;
state->bufstart = input;
state->len = 32;
state->word = (char *) palloc(state->len);
state->eml = pg_database_encoding_max_length();
state->oprisdelim = oprisdelim;
state->is_tsquery = is_tsquery;
return state;
}
/*
* Reinitializes parser for parsing 'input', instead of previous input.
* Reinitializes parser to parse 'input', instead of previous input.
*/
void
reset_tsvector_parser(TSVectorParseState state, char *input)
@ -66,21 +80,21 @@ close_tsvector_parser(TSVectorParseState state)
pfree(state);
}
/* increase the size of 'word' if needed to hold one more character */
#define RESIZEPRSBUF \
do { \
if ( curpos - state->word + pg_database_encoding_max_length() >= state->len ) \
int clen = curpos - state->word; \
if ( clen + state->eml >= state->len ) \
{ \
int clen = curpos - state->word; \
state->len *= 2; \
state->word = (char*)repalloc( (void*)state->word, state->len ); \
state->word = (char *) repalloc(state->word, state->len); \
curpos = state->word + clen; \
} \
} while (0)
#define ISOPERATOR(x) ( pg_mblen(x)==1 && ( *(x)=='!' || *(x)=='&' || *(x)=='|' || *(x)=='(' || *(x)==')' ) )
/* Fills the output parameters, and returns true */
/* Fills gettoken_tsvector's output parameters, and returns true */
#define RETURN_TOKEN \
do { \
if (pos_ptr != NULL) \
@ -111,18 +125,34 @@ do { \
#define WAITPOSDELIM 7
#define WAITCHARCMPLX 8
#define PRSSYNTAXERROR prssyntaxerror(state)
static void
prssyntaxerror(TSVectorParseState state)
{
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
state->is_tsquery ?
errmsg("syntax error in tsquery: \"%s\"", state->bufstart) :
errmsg("syntax error in tsvector: \"%s\"", state->bufstart)));
}
/*
* Get next token from string being parsed. Returns false if
* end of input string is reached, otherwise strval, lenval, pos_ptr
* and poslen output parameters are filled in:
* Get next token from string being parsed. Returns true if successful,
* false if end of input string is reached. On success, these output
* parameters are filled in:
*
* *strval token
* *lenval length of*strval
* *strval pointer to token
* *lenval length of *strval
* *pos_ptr pointer to a palloc'd array of positions and weights
* associated with the token. If the caller is not interested
* in the information, NULL can be supplied. Otherwise
* the caller is responsible for pfreeing the array.
* *poslen number of elements in *pos_ptr
* *endptr scan resumption point
*
* Pass NULL for unwanted output parameters.
*/
bool
gettoken_tsvector(TSVectorParseState state,
@ -155,9 +185,7 @@ gettoken_tsvector(TSVectorParseState state,
oldstate = WAITENDWORD;
}
else if (state->oprisdelim && ISOPERATOR(state->prsbuf))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
else if (!t_isspace(state->prsbuf))
{
COPYCHAR(curpos, state->prsbuf);
@ -170,7 +198,8 @@ gettoken_tsvector(TSVectorParseState state,
if (*(state->prsbuf) == '\0')
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("there is no escaped character")));
errmsg("there is no escaped character: \"%s\"",
state->bufstart)));
else
{
RESIZEPRSBUF;
@ -192,18 +221,14 @@ gettoken_tsvector(TSVectorParseState state,
{
RESIZEPRSBUF;
if (curpos == state->word)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
*(curpos) = '\0';
RETURN_TOKEN;
}
else if (t_iseq(state->prsbuf, ':'))
{
if (curpos == state->word)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
*(curpos) = '\0';
if (state->oprisdelim)
RETURN_TOKEN;
@ -229,9 +254,7 @@ gettoken_tsvector(TSVectorParseState state,
oldstate = WAITENDCMPLX;
}
else if (*(state->prsbuf) == '\0')
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
else
{
RESIZEPRSBUF;
@ -253,9 +276,7 @@ gettoken_tsvector(TSVectorParseState state,
RESIZEPRSBUF;
*(curpos) = '\0';
if (curpos == state->word)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
if (state->oprisdelim)
{
/* state->prsbuf+=pg_mblen(state->prsbuf); */
@ -290,17 +311,17 @@ gettoken_tsvector(TSVectorParseState state,
}
npos++;
WEP_SETPOS(pos[npos - 1], LIMITPOS(atoi(state->prsbuf)));
/* we cannot get here in tsquery, so no need for 2 errmsgs */
if (WEP_GETPOS(pos[npos - 1]) == 0)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("wrong position info in tsvector")));
errmsg("wrong position info in tsvector: \"%s\"",
state->bufstart)));
WEP_SETWEIGHT(pos[npos - 1], 0);
statecode = WAITPOSDELIM;
}
else
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
}
else if (statecode == WAITPOSDELIM)
{
@ -309,42 +330,32 @@ gettoken_tsvector(TSVectorParseState state,
else if (t_iseq(state->prsbuf, 'a') || t_iseq(state->prsbuf, 'A') || t_iseq(state->prsbuf, '*'))
{
if (WEP_GETWEIGHT(pos[npos - 1]))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
WEP_SETWEIGHT(pos[npos - 1], 3);
}
else if (t_iseq(state->prsbuf, 'b') || t_iseq(state->prsbuf, 'B'))
{
if (WEP_GETWEIGHT(pos[npos - 1]))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
WEP_SETWEIGHT(pos[npos - 1], 2);
}
else if (t_iseq(state->prsbuf, 'c') || t_iseq(state->prsbuf, 'C'))
{
if (WEP_GETWEIGHT(pos[npos - 1]))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
WEP_SETWEIGHT(pos[npos - 1], 1);
}
else if (t_iseq(state->prsbuf, 'd') || t_iseq(state->prsbuf, 'D'))
{
if (WEP_GETWEIGHT(pos[npos - 1]))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
WEP_SETWEIGHT(pos[npos - 1], 0);
}
else if (t_isspace(state->prsbuf) ||
*(state->prsbuf) == '\0')
RETURN_TOKEN;
else if (!t_isdigit(state->prsbuf))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("syntax error in tsvector")));
PRSSYNTAXERROR;
}
else /* internal error */
elog(ERROR, "internal error in gettoken_tsvector");