Removed a bunch of obsolete code.

A lot of this code was experimental or temporarily
useful, but is no longer needed.

4 files changed, 0 insertions, 292 deletions

diff --git a/upb/bindings/stdc/error.c b/upb/bindings/stdc/error.c
deleted file mode 100644
index 521c1e4..0000000
--- a/upb/bindings/stdc/error.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
-** Handling of errno.
-*/
-
-#include "upb/stdc/error.h"
-
-#include <string.h>
-
-void upb_status_fromerrno(upb_status *status, int code) {
-  if (code != 0 && !upb_errno_is_wouldblock(code)) {
-    status->error = true;
-    upb_status_setcode(status, &upb_stdc_errorspace, code);
-  }
-}
-
-bool upb_errno_is_wouldblock(int code) {
-  return
-#ifdef EAGAIN
-      code == EAGAIN ||
-#endif
-#ifdef EWOULDBLOCK
-      code == EWOULDBLOCK ||
-#endif
-      false;
-}
-
-bool upb_stdc_codetostr(int code, char *buf, size_t len) {
-  // strerror() may use static buffers and is not guaranteed to be thread-safe,
-  // but it appears that it is not subject to buffer overflows in practice, and
-  // it used by other portable and high-quality software like Lua.  For more
-  // discussion see: http://thread.gmane.org/gmane.comp.lang.lua.general/89506
-  char *err = strerror(code);
-  if (strlen(err) >= len) return false;
-  strcpy(buf, err);
-  return true;
-}
-
-upb_errorspace upb_stdc_errorspace = {"stdc", &upb_stdc_codetostr};
diff --git a/upb/bindings/stdc/error.h b/upb/bindings/stdc/error.h
deleted file mode 100644
index 69a2e2b..0000000
--- a/upb/bindings/stdc/error.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
-** Handling of errno.
-*/
-
-#include "upb/upb.h"
-
-#ifndef UPB_STDC_ERROR_H_
-#define UPB_STDC_ERROR_H_
-
-UPB_BEGIN_EXTERN_C
-
-extern upb_errorspace upb_stdc_errorspace;
-void upb_status_fromerrno(upb_status *status, int code);
-bool upb_errno_is_wouldblock(int code);
-
-UPB_END_EXTERN_C
-
-#endif  /* UPB_STDC_ERROR_H_ */
diff --git a/upb/bindings/stdc/io.c b/upb/bindings/stdc/io.c
deleted file mode 100644
index fe82014..0000000
--- a/upb/bindings/stdc/io.c
+++ /dev/null
@@ -1,172 +0,0 @@
-
-#include "upb/stdc/io.h"
-
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include "upb/stdc/error.h"
-
-// We can make this configurable if necessary.
-#define BUF_SIZE 32768
-
-/* upb_stdio ******************************************************************/
-
-int upb_stdio_cmpbuf(const void *_key, const void *_elem) {
-  const uint64_t *ofs = _key;
-  const upb_stdio_buf *buf = _elem;
-  return (*ofs / BUF_SIZE) - (buf->ofs / BUF_SIZE);
-}
-
-static upb_stdio_buf *upb_stdio_findbuf(const upb_stdio *s, uint64_t ofs) {
-  // TODO: it is probably faster to linear search short lists, and to
-  // special-case the last one or two bufs.
-  return bsearch(&ofs, s->bufs, s->nbuf, sizeof(*s->bufs), &upb_stdio_cmpbuf);
-}
-
-static upb_stdio_buf *upb_stdio_rotatebufs(upb_stdio *s) {
-  upb_stdio_buf **reuse = NULL;  // XXX
-  int num_reused = 0, num_inuse = 0;
-
-  // Could sweep only a subset of bufs if this was a hotspot.
-  for (int i = 0; i < s->nbuf; i++) {
-    upb_stdio_buf *buf = s->bufs[i];
-    if (buf->refcount > 0) {
-      s->bufs[num_inuse++] = buf;
-    } else {
-      reuse[num_reused++] = buf;
-    }
-  }
-  UPB_ASSERT(num_reused + num_inuse == s->nbuf);
-  memcpy(s->bufs + num_inuse, reuse, num_reused * sizeof(upb_stdio_buf*));
-  if (num_reused == 0) {
-    ++s->nbuf;
-    s->bufs = realloc(s->bufs, s->nbuf * sizeof(*s->bufs));
-    s->bufs[s->nbuf-1] = malloc(sizeof(upb_stdio_buf) + BUF_SIZE);
-    return s->bufs[s->nbuf-1];
-  }
-  return s->bufs[s->nbuf-num_reused];
-}
-
-void upb_stdio_discard(void *src, uint64_t ofs) {
-  (void)src;
-  (void)ofs;
-}
-
-upb_bytesuccess_t upb_stdio_fetch(void *src, uint64_t ofs, size_t *bytes_read) {
-  (void)ofs;
-  upb_stdio *stdio = (upb_stdio*)src;
-  upb_stdio_buf *buf = upb_stdio_rotatebufs(stdio);
-retry:
-  *bytes_read = fread(&buf->data, 1, BUF_SIZE, stdio->file);
-  buf->len = *bytes_read;
-  if (*bytes_read < (size_t)BUF_SIZE) {
-    // Error or EOF.
-    if (feof(stdio->file)) {
-      upb_status_seteof(&stdio->src.status);
-      return UPB_BYTE_EOF;
-    }
-    if (ferror(stdio->file)) {
-#ifdef EINTR
-      // If we encounter a client who doesn't want to retry EINTR, we can easily
-      // add a boolean property of the stdio that controls this behavior.
-      if (errno == EINTR) {
-        clearerr(stdio->file);
-        goto retry;
-      }
-#endif
-      upb_status_fromerrno(&stdio->src.status, errno);
-      return upb_errno_is_wouldblock(errno) ?
-          UPB_BYTE_WOULDBLOCK : UPB_BYTE_ERROR;
-    }
-    UPB_ASSERT(false);
-  }
-  return UPB_BYTE_OK;
-}
-
-void upb_stdio_copy(const void *src, uint64_t ofs, size_t len, char *dst) {
-  upb_stdio_buf *buf = upb_stdio_findbuf(src, ofs);
-  ofs -= buf->ofs;
-  memcpy(dst, buf->data + ofs, BUF_SIZE - ofs);
-  len -= (BUF_SIZE - ofs);
-  dst += (BUF_SIZE - ofs);
-  while (len > 0) {
-    ++buf;
-    size_t bytes = UPB_MIN(len, BUF_SIZE);
-    memcpy(dst, buf->data, bytes);
-    len -= bytes;
-    dst += bytes;
-  }
-}
-
-const char *upb_stdio_getptr(const void *src, uint64_t ofs, size_t *len) {
-  upb_stdio_buf *buf = upb_stdio_findbuf(src, ofs);
-  ofs -= buf->ofs;
-  *len = BUF_SIZE - ofs;
-  return &buf->data[ofs];
-}
-
-#if 0
-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, sink));
-  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_status_setf(status, UPB_ERROR, "Error writing to stdio stream.");
-    return -1;
-  }
-  return written;
-}
-
-uint32_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, sink));
-  int written = vfprintf(stdio->file, fmt, args);
-  if (written < 0) {
-    upb_status_seterrf(status, "Error writing to stdio stream.");
-    return -1;
-  }
-  return written;
-}
-#endif
-
-void upb_stdio_init(upb_stdio *stdio) {
-  static upb_bytesrc_vtbl bytesrc_vtbl = {
-    &upb_stdio_fetch,
-    &upb_stdio_discard,
-    &upb_stdio_copy,
-    &upb_stdio_getptr,
-  };
-  upb_bytesrc_init(&stdio->src, &bytesrc_vtbl);
-
-  //static upb_bytesink_vtbl bytesink_vtbl = {
-  //  upb_stdio_putstr,
-  //  upb_stdio_vprintf
-  //};
-  //upb_bytesink_init(&stdio->bytesink, &bytesink_vtbl);
-}
-
-void upb_stdio_reset(upb_stdio* stdio, FILE *file) {
-  stdio->file = file;
-  stdio->should_close = false;
-}
-
-void upb_stdio_open(upb_stdio *stdio, const char *filename, const char *mode,
-                    upb_status *s) {
-  FILE *f = fopen(filename, mode);
-  if (!f) {
-    upb_status_fromerrno(s, errno);
-    return;
-  }
-  setvbuf(stdio->file, NULL, _IONBF, 0);  // Disable buffering; we do our own.
-  upb_stdio_reset(stdio, f);
-  stdio->should_close = true;
-}
-
-void upb_stdio_uninit(upb_stdio *stdio) {
-  // Can't report status; caller should flush() to ensure data is written.
-  if (stdio->should_close) fclose(stdio->file);
-  stdio->file = NULL;
-}
-
-upb_bytesrc* upb_stdio_bytesrc(upb_stdio *stdio) { return &stdio->src; }
-upb_bytesink* upb_stdio_bytesink(upb_stdio *stdio) { return &stdio->sink; }
diff --git a/upb/bindings/stdc/io.h b/upb/bindings/stdc/io.h
deleted file mode 100644
index b131500..0000000
--- a/upb/bindings/stdc/io.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
-** ANSI C file I/O.
-*/
-
-#ifndef UPB_STDC_IO_H_
-#define UPB_STDC_IO_H_
-
-#include <stdio.h>
-#include "upb/bytestream.h"
-
-UPB_BEGIN_EXTERN_C
-
-/* upb_stdio ******************************************************************/
-
-// bytesrc/bytesink for ANSI C stdio, which is less efficient than posixfd, but
-// more portable.
-//
-// Specifically, stdio functions acquire locks on every operation (unless you
-// use the f{read,write,...}_unlocked variants, which are not standard) and
-// performs redundant buffering (unless you disable it with setvbuf(), but we
-// can only do this on newly-opened filehandles).
-
-typedef struct {
-  uint64_t ofs;
-  size_t len;
-  uint32_t refcount;
-  char data[];
-} upb_stdio_buf;
-
-// We use a single object for both bytesrc and bytesink for simplicity.
-// The object is still not thread-safe, and may only be used by one reader
-// and one writer at a time.
-typedef struct {
-  upb_bytesrc src;
-  upb_bytesink sink;
-  FILE *file;
-  bool should_close;
-  upb_stdio_buf **bufs;
-  int nbuf;
-  uint32_t szbuf;
-} upb_stdio;
-
-void upb_stdio_init(upb_stdio *stdio);
-// Caller should call upb_stdio_flush prior to calling this to ensure that
-// all data is flushed, otherwise data can be silently dropped if an error
-// occurs flushing the remaining buffers.
-void upb_stdio_uninit(upb_stdio *stdio);
-
-// Resets the object to read/write to the given "file."  The caller is
-// responsible for closing the file, which must outlive this object.
-void upb_stdio_reset(upb_stdio *stdio, FILE *file);
-
-// As an alternative to upb_stdio_reset(), initializes the object by opening a
-// file, and will handle closing it.  This may result in more efficient I/O
-// than the previous since we can call setvbuf() to disable buffering.
-void upb_stdio_open(upb_stdio *stdio, const char *filename, const char *mode,
-                    upb_status *s);
-
-upb_bytesrc *upb_stdio_bytesrc(upb_stdio *stdio);
-upb_bytesink *upb_stdio_bytesink(upb_stdio *stdio);
-
-UPB_END_EXTERN_C
-
-#endif  /* UPB_STDC_IO_H_ */