string_util: Remove StringFromFormat() and related functions

Given we utilize fmt, we don't need to provide our own functions for formatting anymore

src/common/memory_util.cpp

@@ -167,8 +167,7 @@ std::string MemUsage() {
         return "MemUsage Error";
 
     if (GetProcessMemoryInfo(hProcess, &pmc, sizeof(pmc)))
-        Ret = Common::StringFromFormat(
-            "%s K", Common::ThousandSeparate(pmc.WorkingSetSize / 1024, 7).c_str());
+        Ret = fmt::format("{} K", Common::ThousandSeparate(pmc.WorkingSetSize / 1024, 7));
 
     CloseHandle(hProcess);
     return Ret;

src/common/string_util.cpp

@@ -46,76 +46,6 @@ bool AsciiToHex(const char* _szValue, u32& result) {
     return true;
 }
 
-bool CharArrayFromFormatV(char* out, int outsize, const char* format, va_list args) {
-    int writtenCount;
-
-#ifdef _MSC_VER
-    // You would think *printf are simple, right? Iterate on each character,
-    // if it's a format specifier handle it properly, etc.
-    //
-    // Nooooo. Not according to the C standard.
-    //
-    // According to the C99 standard (7.19.6.1 "The fprintf function")
-    //     The format shall be a multibyte character sequence
-    //
-    // Because some character encodings might have '%' signs in the middle of
-    // a multibyte sequence (SJIS for example only specifies that the first
-    // byte of a 2 byte sequence is "high", the second byte can be anything),
-    // printf functions have to decode the multibyte sequences and try their
-    // best to not screw up.
-    //
-    // Unfortunately, on Windows, the locale for most languages is not UTF-8
-    // as we would need. Notably, for zh_TW, Windows chooses EUC-CN as the
-    // locale, and completely fails when trying to decode UTF-8 as EUC-CN.
-    //
-    // On the other hand, the fix is simple: because we use UTF-8, no such
-    // multibyte handling is required as we can simply assume that no '%' char
-    // will be present in the middle of a multibyte sequence.
-    //
-    // This is why we lookup an ANSI (cp1252) locale here and use _vsnprintf_l.
-    static locale_t c_locale = nullptr;
-    if (!c_locale)
-        c_locale = _create_locale(LC_ALL, ".1252");
-    writtenCount = _vsnprintf_l(out, outsize, format, c_locale, args);
-#else
-    writtenCount = vsnprintf(out, outsize, format, args);
-#endif
-
-    if (writtenCount > 0 && writtenCount < outsize) {
-        out[writtenCount] = '\0';
-        return true;
-    } else {
-        out[outsize - 1] = '\0';
-        return false;
-    }
-}
-
-std::string StringFromFormat(const char* format, ...) {
-    va_list args;
-    char* buf = nullptr;
-#ifdef _WIN32
-    int required = 0;
-
-    va_start(args, format);
-    required = _vscprintf(format, args);
-    buf = new char[required + 1];
-    CharArrayFromFormatV(buf, required + 1, format, args);
-    va_end(args);
-
-    std::string temp = buf;
-    delete[] buf;
-#else
-    va_start(args, format);
-    if (vasprintf(&buf, format, args) < 0)
-        NGLOG_ERROR(Common, "Unable to allocate memory for string");
-    va_end(args);
-
-    std::string temp = buf;
-    free(buf);
-#endif
-    return temp;
-}
-
 // For Debugging. Read out an u8 array.
 std::string ArrayToString(const u8* data, size_t size, int line_len, bool spaces) {
     std::ostringstream oss;

src/common/string_util.h

@@ -4,7 +4,6 @@
 
 #pragma once
 
-#include <cstdarg>
 #include <cstddef>
 #include <iomanip>
 #include <sstream>
@@ -20,19 +19,6 @@ std::string ToLower(std::string str);
 /// Make a string uppercase
 std::string ToUpper(std::string str);
 
-std::string StringFromFormat(const char* format, ...);
-// Cheap!
-bool CharArrayFromFormatV(char* out, int outsize, const char* format, va_list args);
-
-template <size_t Count>
-inline void CharArrayFromFormat(char (&out)[Count], const char* format, ...) {
-    va_list args;
-    va_start(args, format);
-    CharArrayFromFormatV(out, Count, format, args);
-    va_end(args);
-}
-
-// Good
 std::string ArrayToString(const u8* data, size_t size, int line_len = 20, bool spaces = true);
 
 std::string StripSpaces(const std::string& s);

src/common/timer.cpp

@@ -2,7 +2,10 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <time.h>
+#include <ctime>
+
+#include <fmt/format.h>
+
 #ifdef _WIN32
 #include <windows.h>
 // windows.h needs to be included before other windows headers
@@ -104,8 +107,8 @@ std::string Timer::GetTimeElapsedFormatted() const {
     // Hours
     u32 Hours = Minutes / 60;
 
-    std::string TmpStr = StringFromFormat("%02i:%02i:%02i:%03i", Hours, Minutes % 60, Seconds % 60,
-                                          Milliseconds % 1000);
+    std::string TmpStr = fmt::format("{:02}:{:02}:{:02}:{:03}", Hours, Minutes % 60, Seconds % 60,
+                                     Milliseconds % 1000);
     return TmpStr;
 }
 
@@ -165,11 +168,11 @@ std::string Timer::GetTimeFormatted() {
 #ifdef _WIN32
     struct timeb tp;
     (void)::ftime(&tp);
-    return StringFromFormat("%s:%03i", tmp, tp.millitm);
+    return fmt::format("{}:{:03}", tmp, tp.millitm);
 #else
     struct timeval t;
     (void)gettimeofday(&t, nullptr);
-    return StringFromFormat("%s:%03d", tmp, (int)(t.tv_usec / 1000));
+    return fmt::format("{}:{:03}", tmp, static_cast<int>(t.tv_usec / 1000));
 #endif
 }