1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
%{
/*-------------------------------------------------------------------------
*
* syncrep_scanner.l
* a lexical scanner for synchronous_standby_names
*
* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/replication/syncrep_scanner.l
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "lib/stringinfo.h"
/* Avoid exit() on fatal scanner errors (a bit ugly -- see yy_fatal_error) */
#undef fprintf
#define fprintf(file, fmt, msg) fprintf_to_ereport(fmt, msg)
static void
fprintf_to_ereport(const char *fmt, const char *msg)
{
ereport(ERROR, (errmsg_internal("%s", msg)));
}
/* Handles to the buffer that the lexer uses internally */
static YY_BUFFER_STATE scanbufhandle;
static StringInfoData xdbuf;
/* LCOV_EXCL_START */
%}
%option 8bit
%option never-interactive
%option nodefault
%option noinput
%option nounput
%option noyywrap
%option warn
%option prefix="syncrep_yy"
/*
* <xd> delimited identifiers (double-quoted identifiers)
*/
%x xd
space [ \t\n\r\f\v]
digit [0-9]
ident_start [A-Za-z\200-\377_]
ident_cont [A-Za-z\200-\377_0-9\$]
identifier {ident_start}{ident_cont}*
dquote \"
xdstart {dquote}
xdstop {dquote}
xddouble {dquote}{dquote}
xdinside [^"]+
%%
{space}+ { /* ignore */ }
/* brute-force case insensitivity is safer than relying on flex -i */
[Aa][Nn][Yy] { return ANY; }
[Ff][Ii][Rr][Ss][Tt] { return FIRST; }
{xdstart} {
initStringInfo(&xdbuf);
BEGIN(xd);
}
<xd>{xddouble} {
appendStringInfoChar(&xdbuf, '"');
}
<xd>{xdinside} {
appendStringInfoString(&xdbuf, yytext);
}
<xd>{xdstop} {
yylval.str = xdbuf.data;
xdbuf.data = NULL;
BEGIN(INITIAL);
return NAME;
}
<xd><<EOF>> {
yyerror("unterminated quoted identifier");
return JUNK;
}
{identifier} {
yylval.str = pstrdup(yytext);
return NAME;
}
{digit}+ {
yylval.str = pstrdup(yytext);
return NUM;
}
"*" {
yylval.str = "*";
return NAME;
}
"," { return ','; }
"(" { return '('; }
")" { return ')'; }
. { return JUNK; }
%%
/* LCOV_EXCL_STOP */
/* Needs to be here for access to yytext */
void
syncrep_yyerror(const char *message)
{
/* report only the first error in a parse operation */
if (syncrep_parse_error_msg)
return;
if (yytext[0])
syncrep_parse_error_msg = psprintf("%s at or near \"%s\"",
message, yytext);
else
syncrep_parse_error_msg = psprintf("%s at end of input",
message);
}
void
syncrep_scanner_init(const char *str)
{
Size slen = strlen(str);
char *scanbuf;
/*
* Might be left over after ereport()
*/
if (YY_CURRENT_BUFFER)
yy_delete_buffer(YY_CURRENT_BUFFER);
/*
* Make a scan buffer with special termination needed by flex.
*/
scanbuf = (char *) palloc(slen + 2);
memcpy(scanbuf, str, slen);
scanbuf[slen] = scanbuf[slen + 1] = YY_END_OF_BUFFER_CHAR;
scanbufhandle = yy_scan_buffer(scanbuf, slen + 2);
/* Make sure we start in proper state */
BEGIN(INITIAL);
}
void
syncrep_scanner_finish(void)
{
yy_delete_buffer(scanbufhandle);
scanbufhandle = NULL;
}
|
