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cpp: handle 4 byte utf sequences (21-bit runes)

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This commit is contained in:
cinap_lenrek 2015-09-24 12:23:17 +02:00
parent 8003c8b1e2
commit 917da0089d
1 changed files with 7 additions and 2 deletions
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9
sys/src/cmd/cpp/lex.c
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@ -29,6 +29,7 @@
#define UTF2(c) ((c)>=0xA0 && (c)<0xE0) /* 2-char UTF seq */
#define UTF3(c) ((c)>=0xE0 && (c)<0xF0) /* 3-char UTF seq */
#define UTF4(c) ((c)>=0xF0 && (c)<0xF8) /* 4-char UTF seq */
/* character classes */
#define C_WS 1
@ -259,7 +260,7 @@ expandlex(void)
case C_ALPH:
for (j=0; j<=256; j++)
if ('a'<=j&&j<='z' || 'A'<=j&&j<='Z'
|| UTF2(j) || UTF3(j) || j=='_')
|| UTF2(j) || UTF3(j) || UTF4(j) || j=='_')
bigfsm[j][fp->state] = nstate;
continue;
case C_NUM:
@ -274,7 +275,7 @@ expandlex(void)
/* install special cases for ? (trigraphs), \ (splicing), runes */
for (i=0; i<MAXSTATE; i++) {
for (j=0; j<0xFF; j++)
if (j=='?' || j=='\\' || UTF2(j) || UTF3(j)) {
if (j=='?' || j=='\\' || UTF2(j) || UTF3(j) || UTF4(j)) {
if (bigfsm[j][i]>0)
bigfsm[j][i] = ~bigfsm[j][i];
bigfsm[j][i] &= ~QBSBIT;
@ -393,6 +394,10 @@ gettokens(Tokenrow *trp, int reset)
runelen = 3;
goto reswitch;
}
if (UTF4(c)) {
runelen = 4;
goto reswitch;
}
error(WARNING, "Lexical botch in cpp");
ip += runelen;
runelen = 1;