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-rw-r--r--src/interfaces/ecpg/ChangeLog4
-rw-r--r--src/interfaces/ecpg/preproc/pgc.l148
2 files changed, 106 insertions, 46 deletions
diff --git a/src/interfaces/ecpg/ChangeLog b/src/interfaces/ecpg/ChangeLog
index c0b87a89070..4ad3725af00 100644
--- a/src/interfaces/ecpg/ChangeLog
+++ b/src/interfaces/ecpg/ChangeLog
@@ -1945,6 +1945,10 @@ Tue Oct 4 15:23:00 CEST 2005
- Synced parser.
- Fixed another bug in check to report missing varchar pointer implementation.
+
+Wed Oct 5 16:57:42 CEST 2005
+
+ - Synced lexer.
- Set ecpg library version to 5.1.
- Set ecpg version to 4.1.1.
diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index c86f2cdf1e1..f72b7bf7d2a 100644
--- a/src/interfaces/ecpg/preproc/pgc.l
+++ b/src/interfaces/ecpg/preproc/pgc.l
@@ -12,7 +12,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.136 2005/06/16 01:43:48 momjian Exp $
+ * $PostgreSQL: pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.137 2005/10/05 14:58:36 meskes Exp $
*
*-------------------------------------------------------------------------
*/
@@ -29,6 +29,8 @@ extern YYSTYPE yylval;
static int xcdepth = 0; /* depth of nesting in slash-star comments */
static char *dolqstart; /* current $foo$ quote start string */
+bool escape_string_warning;
+static bool warn_on_first_escape;
/*
* literalbuf is used to accumulate literal values when multiple rules
@@ -44,6 +46,7 @@ static int literalalloc; /* current allocated buffer size */
static void addlit(char *ytext, int yleng);
static void addlitchar (unsigned char);
static void parse_include (void);
+static void check_escape_warning(void);
char *token_start;
int state_before;
@@ -111,48 +114,44 @@ static struct _if_value
/* Bit string
*/
xbstart [bB]{quote}
-xbstop {quote}
xbinside [^']*
-xbcat {quote}{whitespace_with_newline}{quote}
-/* Hexadecimal number
- */
+/* Hexadecimal number */
xhstart [xX]{quote}
-xhstop {quote}
xhinside [^']*
-xhcat {quote}{whitespace_with_newline}{quote}
-/* National character
- */
+/* National character */
xnstart [nN]{quote}
-/* C version of hex number
- */
+/* Quoted string that allows backslash escapes */
+xestart [eE]{quote}
+
+/* C version of hex number */
xch 0[xX][0-9A-Fa-f]*
/* Extended quote
- * xqdouble implements embedded quote
- * xqcat allows strings to cross input lines
+ * xqdouble implements embedded quote, ''''
*/
-quote '
xqstart {quote}
-xqstop {quote}
xqdouble {quote}{quote}
xqinside [^\\']+
xqescape [\\][^0-7]
xqoctesc [\\][0-7]{1,3}
xqhexesc [\\]x[0-9A-Fa-f]{1,2}
-xqcat {quote}{whitespace_with_newline}{quote}
/* $foo$ style quotes ("dollar quoting")
* The quoted string starts with $foo$ where "foo" is an optional string
* in the form of an identifier, except that it may not contain "$",
* and extends to the first occurrence of an identical string.
* There is *no* processing of the quoted text.
+ *
+ * {dolqfailed} is an error rule to avoid scanner backup when {dolqdelim}
+ * fails to match its trailing "$".
*/
dolq_start [A-Za-z\200-\377_]
dolq_cont [A-Za-z\200-\377_0-9]
dolqdelim \$({dolq_start}{dolq_cont}*)?\$
+dolqfailed \${dolq_start}{dolq_cont}*
dolqinside [^$]+
/* Double quote
@@ -218,11 +217,16 @@ operator {op_chars}+
/* we no longer allow unary minus in numbers.
* instead we pass it separately to parser. there it gets
* coerced via doNegate() -- Leon aug 20 1999
+ *
+ * {realfail1} and {realfail2} are added to prevent the need for scanner
+ * backup when the {real} rule fails to match completely.
*/
integer {digit}+
decimal (({digit}*\.{digit}+)|({digit}+\.{digit}*))
-real ((({digit}*\.{digit}+)|({digit}+\.{digit}*)|({digit}+))([Ee][-+]?{digit}+))
+real ({integer}|{decimal})[Ee][-+]?{digit}+
+realfail1 ({integer}|{decimal})[Ee]
+realfail2 ({integer}|{decimal})[Ee][-+]
param \${integer}
@@ -262,6 +266,11 @@ whitespace ({space}+|{comment})
horiz_whitespace ({horiz_space}|{comment})
whitespace_with_newline ({horiz_whitespace}*{newline}{whitespace}*)
+quote '
+quotestop {quote}{whitespace}*
+quotecontinue {quote}{whitespace_with_newline}{quote}
+quotefail {quote}{whitespace}*"-"
+
/* special characters for other dbms */
/* we have to react differently in compat mode */
informix_special [\$]
@@ -343,6 +352,7 @@ cppline {space}*#(.*\\{space})*.*{newline}
<xc>{xcinside} { ECHO; }
<xc>{op_chars} { ECHO; }
+<xc>\*+ { ECHO; }
<xc><<EOF>> { mmerror(PARSE_ERROR, ET_FATAL, "Unterminated /* comment"); }
@@ -352,7 +362,9 @@ cppline {space}*#(.*\\{space})*.*{newline}
startlit();
addlitchar('b');
}
-<xb>{xbstop} {
+<xb>{quotestop} |
+<xb>{quotefail} {
+ yyless(1);
BEGIN(SQL);
if (literalbuf[strspn(literalbuf, "01") + 1] != '\0')
mmerror(PARSE_ERROR, ET_ERROR, "invalid bit string input.");
@@ -362,8 +374,8 @@ cppline {space}*#(.*\\{space})*.*{newline}
<xh>{xhinside} |
<xb>{xbinside} { addlit(yytext, yyleng); }
-<xh>{xhcat} |
-<xb>{xbcat} { /* ignore */ }
+<xh>{quotecontinue} |
+<xb>{quotecontinue} { /* ignore */ }
<xb><<EOF>> { mmerror(PARSE_ERROR, ET_FATAL, "Unterminated bit string"); }
<SQL>{xhstart} {
@@ -371,44 +383,71 @@ cppline {space}*#(.*\\{space})*.*{newline}
BEGIN(xh);
startlit();
addlitchar('x');
- }
-<xh>{xhstop} {
- yylval.str = mm_strdup(literalbuf);
- return XCONST;
- }
+ }
+<xh>{quotestop} |
+<xh>{quotefail} {
+ yyless(1);
+ BEGIN(SQL);
+ yylval.str = mm_strdup(literalbuf);
+ return XCONST;
+ }
<xh><<EOF>> { mmerror(PARSE_ERROR, ET_FATAL, "Unterminated hexadecimal integer"); }
<SQL>{xnstart} {
/* National character.
- * Need to remember type info to flow it forward into the parser.
- * Not yet implemented. - thomas 2002-06-17
+ * Transfer it as-is to the backend.
*/
token_start = yytext;
BEGIN(xq);
startlit();
}
<C,SQL>{xqstart} {
- token_start = yytext;
- state_before = YYSTATE;
- BEGIN(xq);
- startlit();
- }
-<xq>{xqstop} {
- BEGIN(state_before);
- yylval.str = mm_strdup(literalbuf);
- return SCONST;
- }
+ warn_on_first_escape = true;
+ token_start = yytext;
+ state_before = YYSTATE;
+ BEGIN(xq);
+ startlit();
+ }
+<C,SQL>{xestart} {
+ warn_on_first_escape = false;
+ token_start = yytext;
+ state_before = YYSTATE;
+ BEGIN(xq);
+ startlit();
+ }
+<xq>{quotestop} |
+<xq>{quotefail} {
+ yyless(1);
+ BEGIN(state_before);
+ yylval.str = mm_strdup(literalbuf);
+ return SCONST;
+ }
<xq>{xqdouble} { addlitchar('\''); }
<xq>{xqinside} { addlit(yytext, yyleng); }
-<xq>{xqescape} { addlit(yytext, yyleng); }
-<xq>{xqoctesc} { addlit(yytext, yyleng); }
-<xq>{xqhexesc} { addlit(yytext, yyleng); }
-<xq>{xqcat} { /* ignore */ }
+<xq>{xqescape} {
+ check_escape_warning();
+ addlit(yytext, yyleng);
+ }
+<xq>{xqoctesc} {
+ check_escape_warning();
+ addlit(yytext, yyleng);
+ }
+<xq>{xqhexesc} {
+ check_escape_warning();
+ addlit(yytext, yyleng);
+ }
+<xq>{quotecontinue} { /* ignore */ }
<xq>. {
/* This is only needed for \ just before EOF */
addlitchar(yytext[0]);
}
<xq><<EOF>> { mmerror(PARSE_ERROR, ET_FATAL, "Unterminated quoted string"); }
+<SQL>{dolqfailed} {
+ /* throw back all but the initial "$" */
+ yyless(1);
+ /* and treat it as {other} */
+ return yytext[0];
+ }
<SQL>{dolqdelim} {
token_start = yytext;
dolqstart = mm_strdup(yytext);
@@ -434,9 +473,8 @@ cppline {space}*#(.*\\{space})*.*{newline}
yyless(yyleng-1);
}
}
-<xdolq>{dolqinside} {
- addlit(yytext, yyleng);
- }
+<xdolq>{dolqinside} { addlit(yytext, yyleng); }
+<xdolq>{dolqfailed} { addlit(yytext, yyleng); }
<xdolq>. {
/* This is only needed for $ inside the quoted text */
addlitchar(yytext[0]);
@@ -588,11 +626,21 @@ cppline {space}*#(.*\\{space})*.*{newline}
{decimal} {
yylval.str = mm_strdup(yytext);
return FCONST;
- }
+ }
<C,SQL>{real} {
yylval.str = mm_strdup(yytext);
return FCONST;
- }
+ }
+<SQL>{realfail1} {
+ yyless(yyleng-1);
+ yylval.str = mm_strdup(yytext);
+ return FCONST;
+ }
+<SQL>{realfail2} {
+ yyless(yyleng-2);
+ yylval.str = mm_strdup(yytext);
+ return FCONST;
+ }
<SQL>:{identifier}((("->"|\.){identifier})|(\[{array}\]))* {
yylval.str = mm_strdup(yytext+1);
return(CVARIABLE);
@@ -1189,3 +1237,11 @@ parse_include(void)
BEGIN C;
}
+
+static void
+check_escape_warning(void)
+{
+ if (warn_on_first_escape && escape_string_warning)
+ mmerror (PARSE_ERROR, ET_WARNING, "nonstandard use of escape in a string literal");
+ warn_on_first_escape = false; /* warn only once per string */
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-31 13:46:30 +0000