diff options
Diffstat (limited to 'newlib/libc/stdio/fvwrite.c')
| -rw-r--r-- | newlib/libc/stdio/fvwrite.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/newlib/libc/stdio/fvwrite.c b/newlib/libc/stdio/fvwrite.c index 62d0ba072..fe0e80111 100644 --- a/newlib/libc/stdio/fvwrite.c +++ b/newlib/libc/stdio/fvwrite.c @@ -19,6 +19,7 @@ #include <stdio.h> #include <string.h> +#include <stdlib.h> #include "local.h" #include "fvwrite.h" @@ -110,7 +111,9 @@ __sfvwrite (fp, uio) * as fit, but pretend we wrote everything. This makes * snprintf() return the number of bytes needed, rather * than the number used, and avoids its write function - * (so that the write function can be invalid). + * (so that the write function can be invalid). If + * we are dealing with the asprintf routines, we will + * dynamically increase the buffer size as needed. */ do { @@ -118,6 +121,19 @@ __sfvwrite (fp, uio) w = fp->_w; if (fp->_flags & __SSTR) { + if (len > w && fp->_flags & __SMBF) + { /* must be asprintf family */ + unsigned char *ptr; + int curpos = (fp->_p - fp->_bf._base); + ptr = (unsigned char *)_realloc_r (fp->_data, fp->_bf._base, + curpos + len); + if (!ptr) + goto err; + fp->_bf._base = ptr; + fp->_p = ptr + curpos; + fp->_bf._size = curpos + len; + w = fp->_w = len; + } if (len < w) w = len; COPY (w); /* copy MIN(fp->_w,len), */ |