janwas
64ecf79c6a
also remove some stupid "returns ERR_OK or negative error code" comments, which is now guaranteed by LibError return type anyway. This was SVN commit r3807.
146 lines
4.1 KiB
C++
146 lines
4.1 KiB
C++
/**
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* =========================================================================
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* File : dll_ver.cpp
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* Project : 0 A.D.
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* Description : return DLL version information.
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*
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* @author Jan.Wassenberg@stud.uni-karlsruhe.de
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* =========================================================================
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*/
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/*
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* Copyright (c) 2004 Jan Wassenberg
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*
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* Redistribution and/or modification are also permitted under the
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* terms of the GNU General Public License as published by the
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* Free Software Foundation (version 2 or later, at your option).
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "precompiled.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include "win_internal.h"
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#include "lib/path_util.h"
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#include "dll_ver.h"
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#if MSC_VERSION
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#pragma comment(lib, "version.lib") // DLL version
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#endif
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// get version information for the specified DLL.
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static LibError get_ver(const char* module_path, char* out_ver, size_t out_ver_len)
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{
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WIN_SAVE_LAST_ERROR; // GetFileVersion*, Ver*
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// determine size of and allocate memory for version information.
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DWORD unused;
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const DWORD ver_size = GetFileVersionInfoSize(module_path, &unused);
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if(!ver_size)
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WARN_RETURN(ERR_FAIL);
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void* buf = malloc(ver_size);
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if(!buf)
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WARN_RETURN(ERR_NO_MEM);
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LibError ret = ERR_FAIL; // single point of exit (for free())
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if(GetFileVersionInfo(module_path, 0, ver_size, buf))
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{
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u16* lang; // -> 16 bit language ID, 16 bit codepage
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uint lang_len;
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const BOOL ok = VerQueryValue(buf, "\\VarFileInfo\\Translation", (void**)&lang, &lang_len);
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if(ok && lang && lang_len == 4)
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{
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char subblock[64];
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sprintf(subblock, "\\StringFileInfo\\%04X%04X\\FileVersion", lang[0], lang[1]);
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const char* in_ver;
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uint in_ver_len;
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if(VerQueryValue(buf, subblock, (void**)&in_ver, &in_ver_len))
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{
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strcpy_s(out_ver, out_ver_len, in_ver);
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ret = ERR_OK;
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}
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}
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}
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free(buf);
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WIN_RESTORE_LAST_ERROR;
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return ret;
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}
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//
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// build a string containing DLL filename(s) and their version info.
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//
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static char* dll_list_buf;
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static size_t dll_list_chars;
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static char* dll_list_pos;
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// set output buffer into which DLL names and their versions will be written.
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void dll_list_init(char* buf, size_t chars)
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{
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dll_list_pos = dll_list_buf = buf;
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dll_list_chars = chars;
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}
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// read DLL file version and append that and its name to the list.
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//
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// name should preferably be the complete path to DLL, to make sure
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// we don't inadvertently load another one on the library search path.
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// we add the .dll extension if necessary.
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LibError dll_list_add(const char* name)
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{
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// not be called before dll_list_init or after failure
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if(!dll_list_pos)
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WARN_RETURN(ERR_LOGIC);
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// some driver names are stored in the registry without .dll extension.
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// if necessary, copy to new buffer and add it there.
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// note: do not change extension if present; some drivers have a
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// ".sys" extension, so always appending ".dll" is incorrect.
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char buf[MAX_PATH];
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const char* dll_name = name;
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const char* ext = path_extension(name);
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if(ext[0] == '\0') // no extension
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{
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snprintf(buf, ARRAY_SIZE(buf), "%s.dll", name);
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dll_name = buf;
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}
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// read file version.
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char dll_ver[128] = "unknown"; // enclosed in () below
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(void)get_ver(dll_name, dll_ver, sizeof(dll_ver));
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// if this fails, default is already set and we don't want to abort.
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const ssize_t max_chars_to_write = (ssize_t)dll_list_chars - (dll_list_pos-dll_list_buf) - 10;
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// reserves enough room for subsequent comma and "..." strings.
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// not first time: prepend comma to string (room was reserved above).
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if(dll_list_pos != dll_list_buf)
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dll_list_pos += sprintf(dll_list_pos, ", ");
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// extract filename.
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const char* dll_fn = path_name_only(dll_name);
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int len = snprintf(dll_list_pos, max_chars_to_write, "%s (%s)", dll_fn, dll_ver);
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// success
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if(len > 0)
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{
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dll_list_pos += len;
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return ERR_OK;
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}
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// didn't fit; complain
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sprintf(dll_list_pos, "..."); // (room was reserved above)
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dll_list_pos = 0; // poison pill, prevent further calls
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WARN_RETURN(ERR_BUF_SIZE);
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}
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