Add new output-only formats and Define constants for the different plist formats

This commit introduces constants for the different plist formats,
and adds 3 new human-readable output-only formats:
- PLIST_FORMAT_PRINT: the default human-readable format
- PLIST_FORMAT_LIMD: "libimobiledevice" format (used in ideviceinfo)
- PLIST_FORMAT_PLUTIL: plutil-style format

Also, a new set of write functions has been added:
- plist_write_to_string
- plist_write_to_stream
- plist_write_to_file

Plus a simple "dump" function:
- plist_print

See documentation for details.

1 files changed, 28 insertions, 6 deletions

diff --git a/src/bytearray.c b/src/bytearray.c
index 7d0549b..39fad5f 100644
--- a/src/bytearray.c
+++ b/src/bytearray.c
@@ -29,6 +29,17 @@ bytearray_t *byte_array_new(size_t initial)
         a->capacity = (initial > PAGE_SIZE) ? (initial+(PAGE_SIZE-1)) & (~(PAGE_SIZE-1)) : PAGE_SIZE;
         a->data = malloc(a->capacity);
         a->len = 0;
+        a->stream = NULL;
+        return a;
+}
+
+bytearray_t *byte_array_new_for_stream(FILE *stream)
+{
+        bytearray_t *a = (bytearray_t*)malloc(sizeof(bytearray_t));
+        a->capacity = (size_t)-1;
+        a->data = NULL;
+        a->len = 0;
+        a->stream = stream;
         return a;
 }
 
@@ -43,6 +54,9 @@ void byte_array_free(bytearray_t *ba)
 
 void byte_array_grow(bytearray_t *ba, size_t amount)
 {
+        if (ba->stream) {
+                return;
+        }
         size_t increase = (amount > PAGE_SIZE) ? (amount+(PAGE_SIZE-1)) & (~(PAGE_SIZE-1)) : PAGE_SIZE;
         ba->data = realloc(ba->data, ba->capacity + increase);
         ba->capacity += increase;
@@ -50,12 +64,20 @@ void byte_array_grow(bytearray_t *ba, size_t amount)
 
 void byte_array_append(bytearray_t *ba, void *buf, size_t len)
 {
-        if (!ba || !ba->data || (len <= 0)) return;
-        size_t remaining = ba->capacity-ba->len;
-        if (len > remaining) {
-                size_t needed = len - remaining;
-                byte_array_grow(ba, needed);
+        if (!ba || (!ba->stream && !ba->data) || (len <= 0)) return;
+        if (ba->stream) {
+                if (fwrite(buf, 1, len, ba->stream) < len) {
+#if DEBUG
+                        fprintf(stderr, "ERROR: Failed to write to stream.\n");
+#endif
+                }
+        } else {
+                size_t remaining = ba->capacity-ba->len;
+                if (len > remaining) {
+                        size_t needed = len - remaining;
+                        byte_array_grow(ba, needed);
+                }
+                memcpy(((char*)ba->data) + ba->len, buf, len);
         }
-        memcpy(((char*)ba->data) + ba->len, buf, len);
         ba->len += len;
 }