From 6bdbb45e88e7b88b294dfb6e4cb493cbc3c8cf74 Mon Sep 17 00:00:00 2001
From: Joshua Haberman <joshua@reverberate.org>
Date: Sun, 13 Feb 2011 12:59:54 -0800
Subject: Merged core/ and stream/ -> src/.  The split wasn't worth it.

---
 src/upb_stdio.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 src/upb_stdio.c

(limited to 'src/upb_stdio.c')

diff --git a/src/upb_stdio.c b/src/upb_stdio.c
new file mode 100644
index 0000000..8857677
--- /dev/null
+++ b/src/upb_stdio.c
@@ -0,0 +1,104 @@
+/*
+ * upb - a minimalist implementation of protocol buffers.
+ *
+ * Copyright (c) 2010 Joshua Haberman.  See LICENSE for details.
+ */
+
+#include "upb_stdio.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include "upb_string.h"
+
+// We can make this configurable if necessary.
+#define BLOCK_SIZE 4096
+
+struct upb_stdio {
+  upb_bytesrc bytesrc;
+  upb_bytesink bytesink;
+  FILE *file;
+};
+
+void upb_stdio_reset(upb_stdio *stdio, FILE* file) {
+  stdio->file = file;
+}
+
+
+/* upb_bytesrc methods ********************************************************/
+
+static upb_strlen_t upb_stdio_read(upb_bytesrc *src, void *buf,
+                                   upb_strlen_t count, upb_status *status) {
+  upb_stdio *stdio = (upb_stdio*)src;
+  assert(count > 0);
+  size_t read = fread(buf, 1, count, stdio->file);
+  if(read < (size_t)count) {
+    // Error or EOF.
+    if(feof(stdio->file)) {
+      upb_seterr(status, UPB_EOF, "");
+      return read;
+    } else if(ferror(stdio->file)) {
+      upb_seterr(status, UPB_ERROR, "Error reading from stdio stream.");
+      return -1;
+    }
+  }
+  return read;
+}
+
+static bool upb_stdio_getstr(upb_bytesrc *src, upb_string *str,
+                             upb_status *status) {
+  upb_strlen_t read = upb_stdio_read(
+      src, upb_string_getrwbuf(str, BLOCK_SIZE), BLOCK_SIZE, status);
+  if (read <= 0) return false;
+  upb_string_getrwbuf(str, read);
+  return true;
+}
+
+
+/* upb_bytesink methods *******************************************************/
+
+upb_strlen_t upb_stdio_putstr(upb_bytesink *sink, upb_string *str, upb_status *status) {
+  upb_stdio *stdio = (upb_stdio*)((char*)sink - offsetof(upb_stdio, bytesink));
+  upb_strlen_t len = upb_string_len(str);
+  upb_strlen_t written = fwrite(upb_string_getrobuf(str), 1, len, stdio->file);
+  if(written < len) {
+    upb_seterr(status, UPB_ERROR, "Error writing to stdio stream.");
+    return -1;
+  }
+  return written;
+}
+
+upb_strlen_t upb_stdio_vprintf(upb_bytesink *sink, upb_status *status,
+                               const char *fmt, va_list args) {
+  upb_stdio *stdio = (upb_stdio*)((char*)sink - offsetof(upb_stdio, bytesink));
+  upb_strlen_t written = vfprintf(stdio->file, fmt, args);
+  if (written < 0) {
+    upb_seterr(status, UPB_ERROR, "Error writing to stdio stream.");
+    return -1;
+  }
+  return written;
+}
+
+upb_stdio *upb_stdio_new() {
+  static upb_bytesrc_vtbl bytesrc_vtbl = {
+    upb_stdio_read,
+    upb_stdio_getstr,
+  };
+
+  static upb_bytesink_vtbl bytesink_vtbl = {
+    NULL,
+    upb_stdio_putstr,
+    upb_stdio_vprintf
+  };
+
+  upb_stdio *stdio = malloc(sizeof(*stdio));
+  upb_bytesrc_init(&stdio->bytesrc, &bytesrc_vtbl);
+  upb_bytesink_init(&stdio->bytesink, &bytesink_vtbl);
+  return stdio;
+}
+
+void upb_stdio_free(upb_stdio *stdio) {
+  free(stdio);
+}
+
+upb_bytesrc* upb_stdio_bytesrc(upb_stdio *stdio) { return &stdio->bytesrc; }
+upb_bytesink* upb_stdio_bytesink(upb_stdio *stdio) { return &stdio->bytesink; }
-- 
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