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estream: Backport es_fopemem_init from master.

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* common/estream.c (es_fopenmem_init): New.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2013-07-03 09:30:22 +02:00
parent a1398844ad
commit 9b8518ffc9
2 changed files with 35 additions and 0 deletions
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32
common/estream.c
View File

@ -2362,6 +2362,38 @@ es_fopenmem (size_t memlimit, const char *ES__RESTRICT mode)
}
/* This is the same as es_fopenmem but intializes the memory with a
copy of (DATA,DATALEN). The stream is initally set to the
beginning. If MEMLIMIT is not 0 but shorter than DATALEN it
DATALEN will be used as the value for MEMLIMIT. */
estream_t
es_fopenmem_init (size_t memlimit, const char *ES__RESTRICT mode,
const void *data, size_t datalen)
{
estream_t stream;
if (memlimit && memlimit < datalen)
memlimit = datalen;
stream = es_fopenmem (memlimit, mode);
if (stream && data && datalen)
{
if (es_writen (stream, data, datalen, NULL))
{
int saveerrno = errno;
es_fclose (stream);
stream = NULL;
_set_errno (saveerrno);
}
else
{
es_seek (stream, 0L, SEEK_SET, NULL);
es_set_indicators (stream, 0, 0);
}
}
return stream;
}
estream_t
es_fopencookie (void *ES__RESTRICT cookie,

3
common/estream.h
View File

@ -76,6 +76,7 @@
#define es_fopen _ESTREAM_PREFIX(es_fopen)
#define es_mopen _ESTREAM_PREFIX(es_mopen)
#define es_fopenmem _ESTREAM_PREFIX(es_fopenmem)
#define es_fopenmem_init _ESTREAM_PREFIX(es_fopenmem_init)
#define es_fdopen _ESTREAM_PREFIX(es_fdopen)
#define es_fdopen_nc _ESTREAM_PREFIX(es_fdopen_nc)
#define es_fpopen _ESTREAM_PREFIX(es_fpopen)
@ -243,6 +244,8 @@ estream_t es_mopen (unsigned char *ES__RESTRICT data,
void (*func_free) (void *mem),
const char *ES__RESTRICT mode);
estream_t es_fopenmem (size_t memlimit, const char *ES__RESTRICT mode);
estream_t es_fopenmem_init (size_t memlimit, const char *ES__RESTRICT mode,
const void *data, size_t datalen);
estream_t es_fdopen (int filedes, const char *mode);
estream_t es_fdopen_nc (int filedes, const char *mode);
estream_t es_fpopen (FILE *fp, const char *mode);