[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] sxpr_parser.c, sxpr_parser.h:
ChangeSet 1.1853.1.1, 2005/05/13 15:36:51+01:00, cl349@xxxxxxxxxxxxxxxxxxxx sxpr_parser.c, sxpr_parser.h: Revert size of sxpr parser input buffer to original size and make buffer allocated dynamically and increasing in size on demand. Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx> sxpr_parser.c | 25 ++++++++++++++++++++++--- sxpr_parser.h | 4 ++-- 2 files changed, 24 insertions(+), 5 deletions(-) diff -Nru a/tools/libxutil/sxpr_parser.c b/tools/libxutil/sxpr_parser.c --- a/tools/libxutil/sxpr_parser.c 2005-05-13 14:02:56 -04:00 +++ b/tools/libxutil/sxpr_parser.c 2005-05-13 14:02:56 -04:00 @@ -160,6 +160,8 @@ if(!z) return; objfree(z->val); z->val = ONONE; + if (z->buf) + deallocate(z->buf); deallocate(z); } @@ -171,6 +173,7 @@ if(!z) goto exit; err = 0; + z->buf = NULL; reset(z); exit: if(err){ @@ -201,8 +204,16 @@ static int savechar(Parser *p, char c){ int err = 0; if(p->buf_i >= p->buf_n){ - err = -ENOMEM; - goto exit; + char *nbuf; + nbuf = allocate(2 * (p->buf_n + 1)); + if (nbuf == NULL) { + err = -ENOMEM; + goto exit; + } + memcpy(nbuf, p->buf, p->buf_i); + deallocate(p->buf); + p->buf = nbuf; + p->buf_n = 2 * (p->buf_n + 1) - 1; } p->buf[p->buf_i] = c; p->buf_i++; @@ -687,8 +698,16 @@ static void reset(Parser *z){ IOStream *error_out = z->error_out; int flags = z->flags; + int buf_n = z->buf_n; + char *buf = z->buf; memzero(z, sizeof(Parser)); - z->buf_n = sizeof(z->buf) - 1; + if (buf) { + z->buf = buf; + z->buf_n = buf_n; + } else { + z->buf = (char *)allocate(PARSER_BUF_SIZE); + z->buf_n = PARSER_BUF_SIZE - 1; + } z->buf_i = 0; z->line_no = 1; z->char_no = 0; diff -Nru a/tools/libxutil/sxpr_parser.h b/tools/libxutil/sxpr_parser.h --- a/tools/libxutil/sxpr_parser.h 2005-05-13 14:02:56 -04:00 +++ b/tools/libxutil/sxpr_parser.h 2005-05-13 14:02:56 -04:00 @@ -28,7 +28,7 @@ /** Size of a parser input buffer. * Tokens read must fit into this size (including trailing null). */ -#define PARSER_BUF_SIZE 4096 +#define PARSER_BUF_SIZE 1024 struct Parser; typedef int ParserStateFn(struct Parser *, char c); @@ -60,7 +60,7 @@ /** Lookahead character. */ char c; /** Buffer for reading tokens. */ - char buf[PARSER_BUF_SIZE]; + char *buf; /** Size of token buffer. */ int buf_n; int buf_i; _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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