commit e8a2c3690940016f0c7050f441b1e78b1bc6d78a
parent 3c39a0e8cbf35f449f303e3ef8323062158121d4
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 18 May 2010 14:31:55 -0300
more comments
Diffstat:
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/lauxlib.c b/lauxlib.c
@@ -1,5 +1,5 @@
/*
-** $Id: lauxlib.c,v 1.211 2010/05/17 18:30:27 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.212 2010/05/18 17:21:24 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
@@ -476,26 +476,26 @@ LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
*/
typedef struct LoadF {
- int first;
- FILE *f;
- char buff[LUAL_BUFFERSIZE];
+ int first; /* pre-read character */
+ FILE *f; /* file being read */
+ char buff[LUAL_BUFFERSIZE]; /* area for reading file */
} LoadF;
static const char *getF (lua_State *L, void *ud, size_t *size) {
LoadF *lf = (LoadF *)ud;
(void)L;
- if (lf->first != EOF) {
+ if (lf->first != EOF) { /* first character not read yet? */
+ lf->buff[0] = (char)lf->first; /* return it */
*size = 1;
- lf->buff[0] = (char)lf->first;
- lf->first = EOF;
+ lf->first = EOF; /* now it has been read */
}
- else {
+ else { /* read a block from file */
/* 'fread' can return > 0 *and* set the EOF flag. If next call to
'getF' called 'fread', it might still wait for user input.
The next check avoids this problem. */
if (feof(lf->f)) return NULL;
- *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f);
+ *size = fread(lf->buff, 1, sizeof(lf->buff), lf->f); /* read block */
}
return lf->buff;
}