avutil/bprint: Add av_bprint_fd_contents()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/bprint.c

@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <time.h>
+#include <unistd.h>
 #include "avassert.h"
 #include "avstring.h"
 #include "bprint.h"
@@ -304,6 +305,22 @@ void av_bprint_escape(AVBPrint *dstbuf, const char *src, const char *special_cha
     }
 }
 
+int av_bprint_fd_contents(AVBPrint *pb, int fd)
+{
+    int ret;
+    char buf[1024];
+    while (1) {
+        ret = read(fd, buf, sizeof(buf));
+        if (!ret)
+            return 0;
+        else if (ret < 0)
+            return AVERROR(errno);
+        av_bprint_append_data(pb, buf, ret);
+        if (!av_bprint_is_complete(pb))
+            return AVERROR(ENOMEM);
+    }
+}
+
 #ifdef TEST
 
 #undef printf

libavutil/bprint.h

@@ -213,4 +213,11 @@ int av_bprint_finalize(AVBPrint *buf, char **ret_str);
 void av_bprint_escape(AVBPrint *dstbuf, const char *src, const char *special_chars,
                       enum AVEscapeMode mode, int flags);
 
+/**
+ * Read contents of fd into print buffer up to EOF.
+ *
+ * @return 0 for success, error code otherwise
+ */
+int av_bprint_fd_contents(AVBPrint *pb, int fd);
+
 #endif /* AVUTIL_BPRINT_H */

libavutil/version.h

@@ -56,8 +56,8 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  52
-#define LIBAVUTIL_VERSION_MINOR  90
-#define LIBAVUTIL_VERSION_MICRO 101
+#define LIBAVUTIL_VERSION_MINOR  91
+#define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \