From 6a1f3a66939308668ab8dce0d195afec16e02af9 Mon Sep 17 00:00:00 2001
From: Joshua Haberman <jhaberman@gmail.com>
Date: Thu, 14 Jul 2011 23:15:00 -0700
Subject: Major refactoring: upb_string is gone in favor of upb_strref.

---
 src/upb.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 61 insertions(+), 19 deletions(-)

(limited to 'src/upb.c')

diff --git a/src/upb.c b/src/upb.c
index 82c7fc2..0f3ea18 100644
--- a/src/upb.c
+++ b/src/upb.c
@@ -5,19 +5,21 @@
  * Author: Josh Haberman <jhaberman@gmail.com>
  */
 
+#include <errno.h>
 #include <stdarg.h>
 #include <stddef.h>
+#include <stdlib.h>
 #include <string.h>
 #include "descriptor_const.h"
 #include "upb.h"
-#include "upb_string.h"
+#include "upb_bytestream.h"
 
 #define alignof(t) offsetof(struct { char c; t x; }, x)
 #define TYPE_INFO(wire_type, ctype, inmemory_type) \
     {alignof(ctype), sizeof(ctype), wire_type, UPB_TYPE(inmemory_type), #ctype},
 
 const upb_type_info upb_types[] = {
-  {0, 0, 0, 0, ""}, // There is no type 0.
+  TYPE_INFO(UPB_WIRE_TYPE_END_GROUP,   void*,     MESSAGE)   // ENDGROUP (fake)
   TYPE_INFO(UPB_WIRE_TYPE_64BIT,       double,    DOUBLE)    // DOUBLE
   TYPE_INFO(UPB_WIRE_TYPE_32BIT,       float,     FLOAT)     // FLOAT
   TYPE_INFO(UPB_WIRE_TYPE_VARINT,      int64_t,   INT64)     // INT64
@@ -42,39 +44,79 @@ const upb_type_info upb_types[] = {
 #ifdef NDEBUG
 upb_value UPB_NO_VALUE = {{0}};
 #else
-upb_value UPB_NO_VALUE = {{0}, UPB_VALUETYPE_RAW};
+upb_value UPB_NO_VALUE = {{0}, -1};
 #endif
 
-void upb_seterr(upb_status *status, enum upb_status_code code,
-                const char *msg, ...) {
-  status->code = code;
-  upb_string_recycle(&status->str);
+void upb_status_init(upb_status *status) {
+  status->buf = NULL;
+  upb_status_clear(status);
+}
+
+void upb_status_uninit(upb_status *status) {
+  free(status->buf);
+}
+
+void upb_status_setf(upb_status *s, enum upb_status_code code,
+                     const char *msg, ...) {
+  s->code = code;
   va_list args;
   va_start(args, msg);
-  upb_string_vprintf(status->str, msg, args);
+  upb_vrprintf(&s->buf, &s->bufsize, 0, msg, args);
   va_end(args);
+  s->str = s->buf;
 }
 
-void upb_copyerr(upb_status *to, upb_status *from)
-{
+void upb_status_copy(upb_status *to, upb_status *from) {
   to->code = from->code;
-  if(from->str) to->str = upb_string_getref(from->str);
+  if (from->str) {
+    if (to->bufsize < from->bufsize) {
+      to->bufsize = from->bufsize;
+      to->buf = realloc(to->buf, to->bufsize);
+      to->str = to->buf;
+    }
+    memcpy(to->str, from->str, from->bufsize);
+  } else {
+    to->str = NULL;
+  }
 }
 
-void upb_clearerr(upb_status *status) {
+void upb_status_clear(upb_status *status) {
   status->code = UPB_OK;
-  if (status->str) upb_string_recycle(&status->str);
+  status->str = NULL;
 }
 
-void upb_printerr(upb_status *status) {
+void upb_status_print(upb_status *status, FILE *f) {
   if(status->str) {
-    fprintf(stderr, "code: %d, msg: " UPB_STRFMT "\n",
-            status->code, UPB_STRARG(status->str));
+    fprintf(f, "code: %d, msg: %s\n", status->code, status->str);
   } else {
-    fprintf(stderr, "code: %d, no msg\n", status->code);
+    fprintf(f, "code: %d, no msg\n", status->code);
   }
 }
 
-void upb_status_uninit(upb_status *status) {
-  upb_string_unref(status->str);
+void upb_status_fromerrno(upb_status *status) {
+  upb_status_setf(status, UPB_ERROR, "%s", strerror(errno));
+}
+
+int upb_vrprintf(char **buf, size_t *size, size_t ofs,
+                 const char *fmt, va_list args) {
+  // Try once without reallocating.  We have to va_copy because we might have
+  // to call vsnprintf again.
+  uint32_t len = *size - ofs;
+  va_list args_copy;
+  va_copy(args_copy, args);
+  uint32_t true_len = vsnprintf(*buf + ofs, len, fmt, args_copy);
+  va_end(args_copy);
+
+  // Resize to be the correct size.
+  if (true_len >= len) {
+    // Need to print again, because some characters were truncated.  vsnprintf
+    // will not write the entire string unless you give it space to store the
+    // NULL terminator also.
+    while (*size < (ofs + true_len + 1)) *size = UPB_MAX(*size * 2, 2);
+    char *newbuf = realloc(*buf, *size);
+    if (!newbuf) return -1;
+    vsnprintf(newbuf + ofs, true_len + 1, fmt, args);
+    *buf = newbuf;
+  }
+  return true_len;
 }
-- 
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