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newlines can be \n', \r', \r\n', or \n\r'

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This commit is contained in:
Roberto Ierusalimschy 2003-08-21 11:16:43 -03:00
parent 433cb1d13a
commit 97af24ea32
1 changed files with 17 additions and 6 deletions
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23
llex.c
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@ -1,5 +1,5 @@
/*
** $Id: llex.c,v 1.119 2003/03/24 12:39:34 roberto Exp roberto $
** $Id: llex.c,v 1.120 2003/05/15 12:20:24 roberto Exp roberto $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
@ -25,6 +25,8 @@
#define next(LS) (LS->current = zgetc(LS->z))
#define nextIsNewline(LS) (LS->current == '\n' || LS->current == '\r')
/* ORDER RESERVED */
static const char *const token2string [] = {
@ -110,7 +112,11 @@ static void luaX_lexerror (LexState *ls, const char *s, int token) {
static void inclinenumber (LexState *LS) {
next(LS); /* skip `\n' */
int old = LS->current;
lua_assert(nextIsNewline(LS));
next(LS); /* skip `\n' or `\r' */
if (nextIsNewline(LS) && LS->current != old)
next(LS); /* skip `\n\r' or `\r\n' */
++LS->linenumber;
luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");
}
@ -209,7 +215,7 @@ static void read_long_string (LexState *LS, SemInfo *seminfo) {
checkbuffer(LS, l);
save(LS, '[', l); /* save first `[' */
save_and_next(LS, l); /* pass the second `[' */
if (LS->current == '\n') /* string starts with a newline? */
if (nextIsNewline(LS)) /* string starts with a newline? */
inclinenumber(LS); /* skip it */
for (;;) {
checkbuffer(LS, l);
@ -235,6 +241,7 @@ static void read_long_string (LexState *LS, SemInfo *seminfo) {
}
continue;
case '\n':
case '\r':
save(LS, '\n', l);
inclinenumber(LS);
if (!seminfo) l = 0; /* reset buffer to avoid wasting space */
@ -262,6 +269,7 @@ static void read_string (LexState *LS, int del, SemInfo *seminfo) {
luaX_lexerror(LS, "unfinished string", TK_EOS);
break; /* to avoid warnings */
case '\n':
case '\r':
save(LS, '\0', l);
luaX_lexerror(LS, "unfinished string", TK_STRING);
break; /* to avoid warnings */
@ -275,7 +283,8 @@ static void read_string (LexState *LS, int del, SemInfo *seminfo) {
case 'r': save(LS, '\r', l); next(LS); break;
case 't': save(LS, '\t', l); next(LS); break;
case 'v': save(LS, '\v', l); next(LS); break;
case '\n': save(LS, '\n', l); inclinenumber(LS); break;
case '\n': /* go through */
case '\r': save(LS, '\n', l); inclinenumber(LS); break;
case EOZ: break; /* will raise an error next loop */
default: {
if (!isdigit(LS->current))
@ -310,7 +319,8 @@ int luaX_lex (LexState *LS, SemInfo *seminfo) {
for (;;) {
switch (LS->current) {
case '\n': {
case '\n':
case '\r': {
inclinenumber(LS);
continue;
}
@ -322,7 +332,7 @@ int luaX_lex (LexState *LS, SemInfo *seminfo) {
if (LS->current == '[' && (next(LS), LS->current == '['))
read_long_string(LS, NULL); /* long comment */
else /* short comment */
while (LS->current != '\n' && LS->current != EOZ)
while (!nextIsNewline(LS) && LS->current != EOZ)
next(LS);
continue;
}
@ -380,6 +390,7 @@ int luaX_lex (LexState *LS, SemInfo *seminfo) {
}
default: {
if (isspace(LS->current)) {
lua_assert(!nextIsNewline(LS));
next(LS);
continue;
}