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d41331d948
Fixed it, sadly this does mean we need to call vsnprintf twice. Once to find out the size involved, a second time to apply.
352 lines
8.1 KiB
C++
352 lines
8.1 KiB
C++
/*
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* Copyright 2013 Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "StringUtil.h"
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#include <string>
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#include <cstdarg>
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#include <cstring> // for strncpy
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#include <stdexcept>
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#ifdef _WINDOWS
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#include <windows.h>
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#define snprintf _snprintf
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#define strncasecmp _strnicmp
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#define strcasecmp _stricmp
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#else
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#include <stdlib.h>
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#include <stdio.h>
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#endif
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#ifndef va_copy
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#define va_copy(d,s) ((d) = (s))
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#endif
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// original source:
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// https://github.com/facebook/folly/blob/master/folly/String.cpp
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//
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void vStringFormat(std::string& output, const char* format, va_list args)
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{
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va_list tmpargs;
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va_copy(tmpargs,args);
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int characters_used = vsnprintf(nullptr, 0, format, tmpargs);
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va_end(tmpargs);
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if (characters_used < 0) {
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// Looks like we have an invalid format string.
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// error out.
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std::string errorMessage("Invalid format string; snprintf returned negative with format string: ");
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errorMessage.append(format);
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throw std::runtime_error(errorMessage);
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}
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else if ((unsigned int)characters_used > output.capacity()) {
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output.resize(characters_used+1);
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va_copy(tmpargs,args);
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characters_used = vsnprintf(&output[0], output.capacity(), format, tmpargs);
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va_end(tmpargs);
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if (characters_used < 0) {
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// We shouldn't have a format error by this point, but I can't imagine what error we
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// could have by this point. Still, error out and report it.
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std::string errorMessage("Invalid format string or unknown vsnprintf error; vsnprintf returned negative with format string: ");
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errorMessage.append(format);
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throw std::runtime_error(errorMessage);
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}
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}
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else {
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output.resize(characters_used + 1);
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va_copy(tmpargs,args);
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characters_used = vsnprintf(&output[0], output.capacity(), format, tmpargs);
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va_end(tmpargs);
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if (characters_used < 0) {
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// We shouldn't have a format error by this point, but I can't imagine what error we
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// could have by this point. still error out and report it.
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std::string errorMessage("Invalid format string or unknown vsnprintf error; vsnprintf returned negative with format string: ");
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errorMessage.append(format);
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throw std::runtime_error(errorMessage);
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}
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}
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}
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void StringFormat(std::string& output, const char* format, ...)
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{
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va_list args;
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va_start(args, format);
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vStringFormat(output,format,args);
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va_end(args);
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}
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// normal strncpy doesnt put a null term on copied strings, this one does
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// ref: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wcecrt/htm/_wcecrt_strncpy_wcsncpy.asp
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char* strn0cpy(char* dest, const char* source, uint32 size) {
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if (!dest)
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return 0;
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if (size == 0 || source == 0) {
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dest[0] = 0;
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return dest;
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}
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strncpy(dest, source, size);
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dest[size - 1] = 0;
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return dest;
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}
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// String N w/null Copy Truncated?
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// return value =true if entire string(source) fit, false if it was truncated
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bool strn0cpyt(char* dest, const char* source, uint32 size) {
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if (!dest)
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return 0;
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if (size == 0 || source == 0) {
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dest[0] = 0;
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return false;
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}
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strncpy(dest, source, size);
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dest[size - 1] = 0;
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return (bool) (source[strlen(dest)] == 0);
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}
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const char *MakeUpperString(const char *source) {
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static char str[128];
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if (!source)
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return nullptr;
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MakeUpperString(source, str);
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return str;
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}
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void MakeUpperString(const char *source, char *target) {
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if (!source || !target) {
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*target=0;
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return;
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}
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while (*source)
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{
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*target = toupper(*source);
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target++;source++;
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}
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*target = 0;
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}
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const char *MakeLowerString(const char *source) {
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static char str[128];
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if (!source)
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return nullptr;
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MakeLowerString(source, str);
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return str;
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}
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void MakeLowerString(const char *source, char *target) {
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if (!source || !target) {
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*target=0;
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return;
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}
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while (*source)
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{
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*target = tolower(*source);
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target++;source++;
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}
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*target = 0;
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}
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int MakeAnyLenString(char** ret, const char* format, ...) {
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int buf_len = 128;
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int chars = -1;
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va_list argptr, tmpargptr;
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va_start(argptr, format);
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while (chars == -1 || chars >= buf_len) {
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safe_delete_array(*ret);
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if (chars == -1)
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buf_len *= 2;
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else
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buf_len = chars + 1;
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*ret = new char[buf_len];
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va_copy(tmpargptr, argptr);
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chars = vsnprintf(*ret, buf_len, format, tmpargptr);
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}
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va_end(argptr);
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return chars;
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}
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uint32 AppendAnyLenString(char** ret, uint32* bufsize, uint32* strlen, const char* format, ...) {
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if (*bufsize == 0)
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*bufsize = 256;
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if (*ret == 0)
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*strlen = 0;
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int chars = -1;
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char* oldret = 0;
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va_list argptr, tmpargptr;
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va_start(argptr, format);
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while (chars == -1 || chars >= (int32)(*bufsize-*strlen)) {
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if (chars == -1)
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*bufsize += 256;
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else
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*bufsize += chars + 25;
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oldret = *ret;
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*ret = new char[*bufsize];
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if (oldret) {
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if (*strlen)
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memcpy(*ret, oldret, *strlen);
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safe_delete_array(oldret);
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}
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va_copy(tmpargptr, argptr);
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chars = vsnprintf(&(*ret)[*strlen], (*bufsize-*strlen), format, tmpargptr);
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}
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va_end(argptr);
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*strlen += chars;
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return *strlen;
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}
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uint32 hextoi(char* num) {
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int len = strlen(num);
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if (len < 3)
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return 0;
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if (num[0] != '0' || (num[1] != 'x' && num[1] != 'X'))
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return 0;
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uint32 ret = 0;
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int mul = 1;
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for (int i=len-1; i>=2; i--) {
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if (num[i] >= 'A' && num[i] <= 'F')
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ret += ((num[i] - 'A') + 10) * mul;
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else if (num[i] >= 'a' && num[i] <= 'f')
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ret += ((num[i] - 'a') + 10) * mul;
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else if (num[i] >= '0' && num[i] <= '9')
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ret += (num[i] - '0') * mul;
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else
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return 0;
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mul *= 16;
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}
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return ret;
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}
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uint64 hextoi64(char* num) {
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int len = strlen(num);
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if (len < 3)
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return 0;
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if (num[0] != '0' || (num[1] != 'x' && num[1] != 'X'))
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return 0;
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uint64 ret = 0;
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int mul = 1;
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for (int i=len-1; i>=2; i--) {
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if (num[i] >= 'A' && num[i] <= 'F')
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ret += ((num[i] - 'A') + 10) * mul;
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else if (num[i] >= 'a' && num[i] <= 'f')
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ret += ((num[i] - 'a') + 10) * mul;
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else if (num[i] >= '0' && num[i] <= '9')
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ret += (num[i] - '0') * mul;
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else
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return 0;
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mul *= 16;
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}
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return ret;
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}
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bool atobool(char* iBool) {
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if (!strcasecmp(iBool, "true"))
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return true;
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if (!strcasecmp(iBool, "false"))
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return false;
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if (!strcasecmp(iBool, "yes"))
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return true;
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if (!strcasecmp(iBool, "no"))
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return false;
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if (!strcasecmp(iBool, "on"))
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return true;
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if (!strcasecmp(iBool, "off"))
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return false;
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if (!strcasecmp(iBool, "enable"))
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return true;
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if (!strcasecmp(iBool, "disable"))
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return false;
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if (!strcasecmp(iBool, "enabled"))
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return true;
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if (!strcasecmp(iBool, "disabled"))
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return false;
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if (!strcasecmp(iBool, "y"))
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return true;
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if (!strcasecmp(iBool, "n"))
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return false;
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if (atoi(iBool))
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return true;
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return false;
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}
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// solar: removes the crap and turns the underscores into spaces.
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char *CleanMobName(const char *in, char *out)
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{
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unsigned i, j;
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for(i = j = 0; i < strlen(in); i++)
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{
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// convert _ to space.. any other conversions like this? I *think* this
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// is the only non alpha char that's not stripped but converted.
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if(in[i] == '_')
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{
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out[j++] = ' ';
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}
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else
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{
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if(isalpha(in[i]) || (in[i] == '`')) // numbers, #, or any other crap just gets skipped
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out[j++] = in[i];
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}
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}
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out[j] = 0; // terimnate the string before returning it
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return out;
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}
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void RemoveApostrophes(std::string &s)
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{
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for(unsigned int i = 0; i < s.length(); ++i)
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if(s[i] == '\'')
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s[i] = '_';
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}
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char *RemoveApostrophes(const char *s)
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{
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char *NewString = new char[strlen(s) + 1];
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strcpy(NewString, s);
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for(unsigned int i = 0 ; i < strlen(NewString); ++i)
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if(NewString[i] == '\'')
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NewString[i] = '_';
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return NewString;
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}
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const char *ConvertArray(int input, char *returnchar)
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{
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sprintf(returnchar, "%i" ,input);
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return returnchar;
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}
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const char *ConvertArrayF(float input, char *returnchar)
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{
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sprintf(returnchar, "%0.2f", input);
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return returnchar;
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}
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