diff options
Diffstat (limited to 'contrib/less/ch.c')
| -rw-r--r-- | contrib/less/ch.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/contrib/less/ch.c b/contrib/less/ch.c index 61bc83a48aac..2ac14d7a1a8e 100644 --- a/contrib/less/ch.c +++ b/contrib/less/ch.c @@ -128,6 +128,9 @@ fch_get() POSITION pos; POSITION len; + if (thisfile == NULL) + return (EOI); + slept = FALSE; /* @@ -416,6 +419,9 @@ ch_seek(pos) BLOCKNUM new_block; POSITION len; + if (thisfile == NULL) + return (0); + len = ch_length(); if (pos < ch_zero() || (len != NULL_POSITION && pos > len)) return (1); @@ -450,6 +456,9 @@ ch_end_seek() { POSITION len; + if (thisfile == NULL) + return (0); + if (ch_flags & CH_CANSEEK) ch_fsize = filesize(ch_file); @@ -503,6 +512,8 @@ ch_beg_seek() public POSITION ch_length() { + if (thisfile == NULL) + return (NULL_POSITION); if (ignore_eoi) return (NULL_POSITION); if (ch_flags & CH_HELPFILE) @@ -516,6 +527,8 @@ ch_length() public POSITION ch_tell() { + if (thisfile == NULL) + return (NULL_POSITION); return (ch_block * LBUFSIZE) + ch_offset; } @@ -527,6 +540,8 @@ ch_forw_get() { register int c; + if (thisfile == NULL) + return (EOI); c = ch_get(); if (c == EOI) return (EOI); @@ -546,6 +561,8 @@ ch_forw_get() public int ch_back_get() { + if (thisfile == NULL) + return (EOI); if (ch_offset > 0) ch_offset --; else @@ -586,6 +603,9 @@ ch_flush() { register struct buf *bp; + if (thisfile == NULL) + return; + if (!(ch_flags & CH_CANSEEK)) { /* @@ -769,6 +789,9 @@ ch_close() { int keepstate = FALSE; + if (thisfile == NULL) + return; + if (ch_flags & (CH_CANSEEK|CH_POPENED|CH_HELPFILE)) { /* @@ -807,6 +830,8 @@ ch_close() public int ch_getflags() { + if (thisfile == NULL) + return (0); return (ch_flags); } |