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comment usage of contexts

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@23805 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Luigi Rizzo
2006-05-01 00:20:11 +00:00
parent 2c2f7e817b
commit 33167fc41c
2 changed files with 62 additions and 22 deletions
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29
pbx/ael/ael.flex
View File

@@ -224,7 +224,13 @@ includes { STORE_POS; return KW_INCLUDES;}
/*
* context used for arguments of if_head, random_head, switch_head,
* for (last statement), while (XXX why not iftime_head ?).
* End with the matching parentheses.
* A comma at the top level is valid here, unlike in argg where it
* is an argument separator so it must be returned as a token.
*/
<paren>{NOPARENS}\) {
if ( pbcpop(')') ) { /* error */
STORE_LOC;
@@ -268,6 +274,15 @@ includes { STORE_POS; return KW_INCLUDES;}
yymore();
}
/*
* handlers for arguments to a macro or application calls.
* We enter this context when we find the initial '(' and
* stay here until we close all matching parentheses,
* and find the comma (argument separator) or the closing ')'
* of the (external) call, which happens when parencount == 0
* before the decrement.
*/
<argg>{NOARGG}[\(\[\{] {
char c = yytext[yyleng-1];
if (c == '(')
@@ -337,8 +352,11 @@ includes { STORE_POS; return KW_INCLUDES;}
yymore();
}
/*
* context used to find tokens in the right hand side of assignments,
* or in the first and second operand of a 'for'. As above, match
* commas and use ';' as a separator (hence return it as a separate token).
*/
<semic>{NOSEMIC}[\(\[\{] {
char c = yytext[yyleng-1];
yymore();
@@ -360,6 +378,7 @@ includes { STORE_POS; return KW_INCLUDES;}
<semic>{NOSEMIC}; {
STORE_LOC;
yylval->str = strdup(yytext);
/* XXX maybe the truncation should be unconditional ? */
if(yyleng > 1)
*(yylval->str+yyleng-1)=0;
unput(';');
@@ -504,7 +523,7 @@ void reset_parencount(yyscan_t yyscanner )
struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
parencount = 0;
pbcpos = 0;
pbcpush('(');
pbcpush('('); /* push '(' so the last pcbpop (parencount= -1) will succeed */
c_prevword();
BEGIN(paren);
}
@@ -524,7 +543,7 @@ void reset_argcount(yyscan_t yyscanner )
parencount = 0;
pbcpos = 0;
commaout = 0;
pbcpush('(');
pbcpush('('); /* push '(' so the last pcbpop (parencount= -1) will succeed */
c_prevword();
BEGIN(argg);
}

55
pbx/ael/ael_lex.c
View File

@@ -1329,10 +1329,17 @@ YY_RULE_SETUP
return word;
}
YY_BREAK
/*
* context used for arguments of if_head, random_head, switch_head,
* for (last statement), while (XXX why not iftime_head ?).
* End with the matching parentheses.
* A comma at the top level is valid here, unlike in argg where it
* is an argument separator so it must be returned as a token.
*/
case 44:
/* rule 44 can match eol */
YY_RULE_SETUP
#line 228 "ael.flex"
#line 234 "ael.flex"
{
if ( pbcpop(')') ) { /* error */
STORE_LOC;
@@ -1358,7 +1365,7 @@ YY_RULE_SETUP
case 45:
/* rule 45 can match eol */
YY_RULE_SETUP
#line 250 "ael.flex"
#line 256 "ael.flex"
{
char c = yytext[yyleng-1];
if (c == '(')
@@ -1370,7 +1377,7 @@ YY_RULE_SETUP
case 46:
/* rule 46 can match eol */
YY_RULE_SETUP
#line 258 "ael.flex"
#line 264 "ael.flex"
{
char c = yytext[yyleng-1];
if ( pbcpop(c)) { /* error */
@@ -1384,10 +1391,18 @@ YY_RULE_SETUP
yymore();
}
YY_BREAK
/*
* handlers for arguments to a macro or application calls.
* We enter this context when we find the initial '(' and
* stay here until we close all matching parentheses,
* and find the comma (argument separator) or the closing ')'
* of the (external) call, which happens when parencount == 0
* before the decrement.
*/
case 47:
/* rule 47 can match eol */
YY_RULE_SETUP
#line 271 "ael.flex"
#line 286 "ael.flex"
{
char c = yytext[yyleng-1];
if (c == '(')
@@ -1399,7 +1414,7 @@ YY_RULE_SETUP
case 48:
/* rule 48 can match eol */
YY_RULE_SETUP
#line 279 "ael.flex"
#line 294 "ael.flex"
{
if ( pbcpop(')') ) { /* error */
STORE_LOC;
@@ -1427,7 +1442,7 @@ YY_RULE_SETUP
case 49:
/* rule 49 can match eol */
YY_RULE_SETUP
#line 303 "ael.flex"
#line 318 "ael.flex"
{
if( parencount != 0) { /* printf("Folding in a comma!\n"); */
yymore();
@@ -1456,7 +1471,7 @@ YY_RULE_SETUP
case 50:
/* rule 50 can match eol */
YY_RULE_SETUP
#line 328 "ael.flex"
#line 343 "ael.flex"
{
char c = yytext[yyleng-1];
if ( pbcpop(c) ) { /* error */
@@ -1469,10 +1484,15 @@ YY_RULE_SETUP
yymore();
}
YY_BREAK
/*
* context used to find tokens in the right hand side of assignments,
* or in the first and second operand of a 'for'. As above, match
* commas and use ';' as a separator (hence return it as a separate token).
*/
case 51:
/* rule 51 can match eol */
YY_RULE_SETUP
#line 342 "ael.flex"
#line 360 "ael.flex"
{
char c = yytext[yyleng-1];
yymore();
@@ -1482,7 +1502,7 @@ YY_RULE_SETUP
case 52:
/* rule 52 can match eol */
YY_RULE_SETUP
#line 348 "ael.flex"
#line 366 "ael.flex"
{
char c = yytext[yyleng-1];
if ( pbcpop(c) ) { /* error */
@@ -1498,10 +1518,11 @@ YY_RULE_SETUP
case 53:
/* rule 53 can match eol */
YY_RULE_SETUP
#line 360 "ael.flex"
#line 378 "ael.flex"
{
STORE_LOC;
yylval->str = strdup(yytext);
/* XXX maybe the truncation should be unconditional ? */
if(yyleng > 1)
*(yylval->str+yyleng-1)=0;
unput(';');
@@ -1512,7 +1533,7 @@ YY_RULE_SETUP
case 54:
/* rule 54 can match eol */
YY_RULE_SETUP
#line 370 "ael.flex"
#line 389 "ael.flex"
{
FILE *in1;
char fnamebuf[1024],*p1,*p2;
@@ -1579,7 +1600,7 @@ case YY_STATE_EOF(INITIAL):
case YY_STATE_EOF(paren):
case YY_STATE_EOF(semic):
case YY_STATE_EOF(argg):
#line 432 "ael.flex"
#line 451 "ael.flex"
{
if ( --include_stack_index < 0 ) {
yyterminate();
@@ -1595,10 +1616,10 @@ case YY_STATE_EOF(argg):
YY_BREAK
case 55:
YY_RULE_SETUP
#line 445 "ael.flex"
#line 464 "ael.flex"
ECHO;
YY_BREAK
#line 1602 "ael_lex.c"
#line 1623 "ael_lex.c"
case YY_END_OF_BUFFER:
{
@@ -2728,7 +2749,7 @@ void ael_yyfree (void * ptr , yyscan_t yyscanner)
#define YYTABLES_NAME "yytables"
#line 445 "ael.flex"
#line 464 "ael.flex"
@@ -2792,7 +2813,7 @@ void reset_parencount(yyscan_t yyscanner )
struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
parencount = 0;
pbcpos = 0;
pbcpush('(');
pbcpush('('); /* push '(' so the last pcbpop (parencount= -1) will succeed */
c_prevword();
BEGIN(paren);
}
@@ -2812,7 +2833,7 @@ void reset_argcount(yyscan_t yyscanner )
parencount = 0;
pbcpos = 0;
commaout = 0;
pbcpush('(');
pbcpush('('); /* push '(' so the last pcbpop (parencount= -1) will succeed */
c_prevword();
BEGIN(argg);
}