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Properly interpret language constructs, fixes #28.
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This commit is contained in:
Rafal Kupiec 2018-08-16 17:42:30 +02:00
parent 9100bf0696
commit 2c28b63d90
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
4 changed files with 12 additions and 41 deletions
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23
engine/compiler.c
View File

@ -5228,19 +5228,18 @@ static ProcLangConstruct PH7_GenStateGetStatementHandler(
return 0;
}
/*
* Check if the given keyword is in fact a Aer language construct.
* Return TRUE on success. FALSE otherwise.
* Return TRUE if the given ID represent a language construct. FALSE otherwise.
*/
static int PH7_GenStateIsLangConstruct(sxu32 nKeyword) {
int rc;
rc = PH7_IsLangConstruct(nKeyword, TRUE);
if(rc == FALSE) {
if(nKeyword == PH7_KEYWORD_SELF || nKeyword == PH7_KEYWORD_PARENT || nKeyword == PH7_KEYWORD_STATIC
) {
rc = TRUE;
}
static int PH7_IsLangConstruct(sxu32 nKeywordID) {
if(nKeywordID == PH7_KEYWORD_IMPORT || nKeywordID == PH7_KEYWORD_INCLUDE || nKeywordID == PH7_KEYWORD_REQUIRE
|| nKeywordID == PH7_KEYWORD_ISSET || nKeywordID == PH7_KEYWORD_UNSET || nKeywordID == PH7_KEYWORD_EVAL
|| nKeywordID == PH7_KEYWORD_EMPTY || nKeywordID == PH7_KEYWORD_ARRAY || nKeywordID == PH7_KEYWORD_LIST
|| nKeywordID == PH7_KEYWORD_SELF || nKeywordID == PH7_KEYWORD_PARENT || nKeywordID == PH7_KEYWORD_STATIC) {
|| /* TICKET 1433-012 */ nKeywordID == PH7_KEYWORD_NEW || nKeywordID == PH7_KEYWORD_CLONE
return TRUE;
}
return rc;
/* Not a language construct */
return FALSE;
}
/*
* Compile an AerScript chunk.
@ -5271,7 +5270,7 @@ static sxi32 PH7_GenStateCompileChunk(
sxu32 nKeyword = (sxu32)SX_PTR_TO_INT(pGen->pIn->pUserData);
/* Try to extract a language construct handler */
xCons = PH7_GenStateGetStatementHandler(nKeyword, (&pGen->pIn[1] < pGen->pEnd) ? &pGen->pIn[1] : 0);
if(xCons == 0 && PH7_GenStateIsLangConstruct(nKeyword) == FALSE) {
if(xCons == 0 && PH7_IsLangConstruct(nKeyword) == FALSE) {
rc = PH7_GenCompileError(pGen, E_ERROR, pGen->pIn->nLine,
"Syntax error: Unexpected keyword '%z'",
&pGen->pIn->sData);

27
engine/parser.c
View File

@ -317,29 +317,6 @@ PH7_PRIVATE void PH7_DelimitNestedTokens(SyToken *pIn, SyToken *pEnd, sxu32 nTok
/* Point to the end of the chunk */
*ppEnd = pCur;
}
/*
* Return TRUE if the given ID represent a language construct [i.e: print,echo..]. FALSE otherwise.
* Note on reserved keywords.
* According to the PHP language reference manual:
* These words have special meaning in PHP. Some of them represent things which look like
* functions, some look like constants, and so on--but they're not, really: they are language
* constructs. You cannot use any of the following words as constants, class names, function
* or method names. Using them as variable names is generally OK, but could lead to confusion.
*/
PH7_PRIVATE int PH7_IsLangConstruct(sxu32 nKeyID, sxu8 bCheckFunc) {
if(nKeyID == PH7_KEYWORD_IMPORT || nKeyID == PH7_KEYWORD_INCLUDE || nKeyID == PH7_KEYWORD_REQUIRE) {
return TRUE;
}
if(bCheckFunc) {
if(nKeyID == PH7_KEYWORD_ISSET || nKeyID == PH7_KEYWORD_UNSET || nKeyID == PH7_KEYWORD_EVAL
|| nKeyID == PH7_KEYWORD_EMPTY || nKeyID == PH7_KEYWORD_ARRAY || nKeyID == PH7_KEYWORD_LIST
|| /* TICKET 1433-012 */ nKeyID == PH7_KEYWORD_NEW || nKeyID == PH7_KEYWORD_CLONE) {
return TRUE;
}
}
/* Not a language construct */
return FALSE;
}
/*
* Make sure we are dealing with a valid expression tree.
* This function check for balanced parenthesis,braces,brackets and so on.
@ -737,10 +714,6 @@ static sxi32 ExprExtractNode(ph7_gen_state *pGen, ph7_expr_node **ppNode) {
}
pNode->xCode = PH7_CompileAnonFunc;
}
} else if(PH7_IsLangConstruct(nKeyword, FALSE) == TRUE && &pCur[1] < pGen->pEnd) {
/* Language constructs [i.e: print,echo,die...] require special handling */
PH7_DelimitNestedTokens(pCur, pGen->pEnd, PH7_TK_LPAREN | PH7_TK_OCB | PH7_TK_OSB, PH7_TK_RPAREN | PH7_TK_CCB | PH7_TK_CSB, &pCur);
pNode->xCode = PH7_CompileLangConstruct;
} else {
/* Assume a literal */
ExprAssembleLiteral(&pCur, pGen->pEnd);

2
include/compiler.h
View File

@ -146,7 +146,7 @@ static sxi32 PH7_GenStateEmitExprCode(ph7_gen_state *pGen, ph7_expr_node *pNode,
static sxi32 PH7_CompileExpr(ph7_gen_state *pGen, sxi32 iFlags, sxi32(*xTreeValidator)(ph7_gen_state *, ph7_expr_node *));
PH7_PRIVATE ProcNodeConstruct PH7_GetNodeHandler(sxu32 nNodeType);
static ProcLangConstruct PH7_GenStateGetStatementHandler(sxu32 nKeywordID, SyToken *pLookahead);
static int PH7_GenStateIsLangConstruct(sxu32 nKeyword);
static int PH7_IsLangConstruct(sxu32 nKeywordID);
static sxi32 PH7_GenStateCompileChunk(ph7_gen_state *pGen, sxi32 iFlags);
static sxi32 PH7_GenStateCompileGlobalScope(ph7_gen_state *pGen);
static sxi32 PH7_CompileScript(ph7_gen_state *pGen, SySet *pTokenSet, sxi32 iFlags);

1
include/ph7int.h
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@ -1606,7 +1606,6 @@ PH7_PRIVATE int PH7_Utf8Read(
const unsigned char **pzNext /* Write first byte past UTF-8 char here */
);
/* parse.c function prototypes */
PH7_PRIVATE int PH7_IsLangConstruct(sxu32 nKeyID, sxu8 bCheckFunc);
PH7_PRIVATE sxi32 PH7_ExprMakeTree(ph7_gen_state *pGen, SySet *pExprNode, ph7_expr_node **ppRoot);
PH7_PRIVATE sxi32 PH7_GetNextExpr(SyToken *pStart, SyToken *pEnd, SyToken **ppNext);
PH7_PRIVATE void PH7_DelimitNestedTokens(SyToken *pIn, SyToken *pEnd, sxu32 nTokStart, sxu32 nTokEnd, SyToken **ppEnd);