[sql] Rewrite sqlite patching "system".

third_party/sqlite/icu-shell.patch

Index: third_party/sqlite/icu-shell.patch
diff --git a/third_party/sqlite/icu-shell.patch b/third_party/sqlite/icu-shell.patch
deleted file mode 100644
index 6a835be32531124e1feab48bf64d32e689d3ec4c..0000000000000000000000000000000000000000
--- a/third_party/sqlite/icu-shell.patch
+++ /dev/null
@@ -1,92 +0,0 @@
-History uses fts3 with an icu-based segmenter.  These changes allow
-building a sqlite3 binary which can read those files.
-
-Index: src/shell.c
-===================================================================
---- src/shell.c	2009-09-04 13:37:43.000000000 -0700
-+++ src/shell.c	2009-09-15 11:32:08.000000000 -0700
-@@ -3007,6 +3007,14 @@
-   int i;
-   int rc = 0;
- 
-+  /* Begin evanm patch. */
-+  extern int sqlite_shell_init_icu();
-+  if( !sqlite_shell_init_icu() ){
-+    fprintf(stderr, "%s: warning: couldn't find icudt38.dll; "
-+                    "queries against ICU FTS tables will fail.\n", argv[0]);
-+  }
-+  /* End evanm patch. */
-+
-   Argv0 = argv[0];
-   main_init(&data);
-   stdin_is_interactive = isatty(0);
-diff --git src/shell_icu_linux.c src/shell_icu_linux.c
-new file mode 100644
-index 0000000..4ad0e42
---- /dev/null
-+++ src/shell_icu_linux.c
-@@ -0,0 +1,27 @@
-+/* Copyright 2007 Google Inc. All Rights Reserved.
-+**/
-+
-+#include <limits.h>
-+#include <unistd.h>
-+#include "unicode/putil.h"
-+#include "unicode/udata.h"
-+
-+/*
-+** This function attempts to load the ICU data tables from a data file.
-+** Returns 0 on failure, nonzero on success.
-+** This a hack job of icu_utils.cc:Initialize().  It's Chrome-specific code.
-+*/
-+int sqlite_shell_init_icu() {
-+  char bin_dir[PATH_MAX + 1];
-+  int bin_dir_size = readlink("/proc/self/exe", bin_dir, PATH_MAX);
-+  if (bin_dir_size < 0 || bin_dir_size > PATH_MAX)
-+    return 0;
-+  bin_dir[bin_dir_size] = 0;;
-+
-+  u_setDataDirectory(bin_dir);
-+  // Only look for the packaged data file;
-+  // the default behavior is to look for individual files.
-+  UErrorCode err = U_ZERO_ERROR;
-+  udata_setFileAccess(UDATA_ONLY_PACKAGES, &err);
-+  return err == U_ZERO_ERROR;
-+}
-Index: src/shell_icu_win.c
-===================================================================
---- src/shell_icu_win.c	1969-12-31 16:00:00.000000000 -0800
-+++ src/shell_icu_win.c	2011-03-03 14:29:11.000000000 -0700
-@@ -0,0 +1,32 @@
-+/* Copyright 2011 Google Inc. All Rights Reserved.
-+**/
-+
-+#include <windows.h>
-+#include "unicode/udata.h"
-+
-+/*
-+** This function attempts to load the ICU data tables from a DLL.
-+** Returns 0 on failure, nonzero on success.
-+** This a hack job of icu_utils.cc:Initialize().  It's Chrome-specific code.
-+*/
-+
-+#define ICU_DATA_SYMBOL "icudt" U_ICU_VERSION_SHORT "_dat"
-+int sqlite_shell_init_icu() {
-+  HMODULE module;
-+  FARPROC addr;
-+  UErrorCode err;
-+
-+  // Chrome dropped U_ICU_VERSION_SHORT from the icu data dll name.
-+  module = LoadLibrary(L"icudt.dll");
-+  if (!module)
-+    return 0;
-+
-+  addr = GetProcAddress(module, ICU_DATA_SYMBOL);
-+  if (!addr)
-+    return 0;
-+
-+  err = U_ZERO_ERROR;
-+  udata_setCommonData(addr, &err);
-+
-+  return 1;
-+}