diff options
Diffstat (limited to 'libio')
| -rw-r--r-- | libio/iofgets.c | 10 | ||||
| -rw-r--r-- | libio/iofgets_u.c | 10 | ||||
| -rw-r--r-- | libio/iofgetws.c | 10 | ||||
| -rw-r--r-- | libio/iofgetws_u.c | 10 | ||||
| -rw-r--r-- | libio/iogetline.c | 56 |
5 files changed, 65 insertions, 31 deletions
diff --git a/libio/iofgets.c b/libio/iofgets.c index 879cc975a3..601b1746a1 100644 --- a/libio/iofgets.c +++ b/libio/iofgets.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003 +/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -41,6 +41,14 @@ _IO_fgets (buf, n, fp) CHECK_FILE (fp, NULL); if (n <= 0) return NULL; + if (__builtin_expect (n == 1, 0)) + { + /* Another irregular case: since we have to store a NUL byte and + there is only room for exactly one byte, we don't have to + read anything. */ + buf[0] = '\0'; + return buf; + } _IO_acquire_lock (fp); /* This is very tricky since a file descriptor may be in the non-blocking mode. The error flag doesn't mean much in this diff --git a/libio/iofgets_u.c b/libio/iofgets_u.c index ded2a7c83c..4fb5b1c0fd 100644 --- a/libio/iofgets_u.c +++ b/libio/iofgets_u.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993,1995,1996,1997,1998,2002 Free Software Foundation, Inc. +/* Copyright (C) 1993,1995-1998,2002,2005 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -40,6 +40,14 @@ fgets_unlocked (buf, n, fp) CHECK_FILE (fp, NULL); if (n <= 0) return NULL; + if (__builtin_expect (n == 1, 0)) + { + /* Another irregular case: since we have to store a NUL byte and + there is only room for exactly one byte, we don't have to + read anything. */ + buf[0] = '\0'; + return buf; + } /* This is very tricky since a file descriptor may be in the non-blocking mode. The error flag doesn't mean much in this case. We return an error only when there is a new error. */ diff --git a/libio/iofgetws.c b/libio/iofgetws.c index 654c051a28..775391137a 100644 --- a/libio/iofgetws.c +++ b/libio/iofgetws.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2001 +/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2001, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -41,6 +41,14 @@ fgetws (buf, n, fp) CHECK_FILE (fp, NULL); if (n <= 0) return NULL; + if (__builtin_expect (n == 1, 0)) + { + /* Another irregular case: since we have to store a NUL byte and + there is only room for exactly one byte, we don't have to + read anything. */ + buf[0] = L'\0'; + return buf; + } _IO_acquire_lock (fp); /* This is very tricky since a file descriptor may be in the non-blocking mode. The error flag doesn't mean much in this diff --git a/libio/iofgetws_u.c b/libio/iofgetws_u.c index 1253564566..9fb8a5cac1 100644 --- a/libio/iofgetws_u.c +++ b/libio/iofgetws_u.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993, 95, 96, 97, 98, 99 Free Software Foundation, Inc. +/* Copyright (C) 1993, 95, 96, 97, 98, 99, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -40,6 +40,14 @@ fgetws_unlocked (buf, n, fp) CHECK_FILE (fp, NULL); if (n <= 0) return NULL; + if (__builtin_expect (n == 1, 0)) + { + /* Another irregular case: since we have to store a NUL byte and + there is only room for exactly one byte, we don't have to + read anything. */ + buf[0] = L'\0'; + return buf; + } /* This is very tricky since a file descriptor may be in the non-blocking mode. The error flag doesn't mean much in this case. We return an error only when there is a new error. */ diff --git a/libio/iogetline.c b/libio/iogetline.c index eca38cf773..022a444f77 100644 --- a/libio/iogetline.c +++ b/libio/iogetline.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1993,1997,1998,2000,2001,2002 Free Software Foundation, Inc. +/* Copyright (C) 1993,1997,1998,2000,2001,2002,2005 + Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -73,7 +74,8 @@ _IO_getline_info (fp, buf, n, delim, extract_delim, eof) int c = __uflow (fp); if (c == EOF) { - if (eof) *eof = c; + if (eof) + *eof = c; break; } if (c == delim) @@ -89,31 +91,31 @@ _IO_getline_info (fp, buf, n, delim, extract_delim, eof) *ptr++ = c; n--; } - else - { - char *t; - if ((_IO_size_t) len >= n) - len = n; - t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len); - if (t != NULL) - { - _IO_size_t old_len = ptr-buf; - len = t - fp->_IO_read_ptr; - if (extract_delim >= 0) - { - ++t; - if (extract_delim > 0) - ++len; - } - memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len); - fp->_IO_read_ptr = t; - return old_len + len; - } - memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len); - fp->_IO_read_ptr += len; - ptr += len; - n -= len; - } + else + { + char *t; + if ((_IO_size_t) len >= n) + len = n; + t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len); + if (t != NULL) + { + _IO_size_t old_len = ptr-buf; + len = t - fp->_IO_read_ptr; + if (extract_delim >= 0) + { + ++t; + if (extract_delim > 0) + ++len; + } + memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len); + fp->_IO_read_ptr = t; + return old_len + len; + } + memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len); + fp->_IO_read_ptr += len; + ptr += len; + n -= len; + } } return ptr - buf; } |