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Every file the core touches goes through libretro-common's filestream, path and dirent layers, taken from RetroArch: vfs_hybrid opens local paths with libretro-common's own implementation and hands URI paths (and, on Android, anything a local open cannot reach) to the frontend's VFS. File::IOFile and File::DirectIOFile sit on RFILE, and FileUtil, FileSearch and the directory walks on path_stat, path_mkdir and retro_opendir. Dolphin's fopen, POSIX and Win32 file code, std::filesystem and std::fstream are gone, with the dual VFS paths and the core option that chose between them. Files opened for reading alone are memory-mapped where the platform can: reads copy straight out of the page cache, DirectIOFile's offset reads on one mapped object are thread safe, and GetMappedPtr(), View() and Prefetch() lend and warm without a copy. Text files are read a line at a time through File::LineReader, lent from the mapping or a window refilled a block at a time, never a byte at a time; JSON is parsed straight from the mapping. Ini files and the cheat file are built in memory and written once, an ini only when it changed and then atomically.
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/* Copyright (C) 2010-2020 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (compat_posix_string.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <ctype.h>
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#include <compat/posix_string.h>
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#ifdef _WIN32
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#undef strcasecmp
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#undef strdup
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#undef isblank
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#undef strtok_r
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#include <ctype.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <compat/strl.h>
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#include <string.h>
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/* ASCII case folding, not tolower.
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*
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* tolower takes an int that must be representable as unsigned char or
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* EOF. A plain char sign-extends any byte above 0x7F into a negative
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* value, so passing one straight in is undefined - and these are
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* compared on file paths and user text, where such bytes are ordinary.
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* glibc happens to tolerate it because its table is offset for exactly
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* this mistake; nothing guarantees the next libc will.
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*
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* Folding only A-Z is also what the callers mean. Anything wider makes
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* a comparison depend on the user's locale, which for extensions,
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* driver names and identifiers is not wanted. */
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#define COMPAT_LOWER(c) \
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(((c) >= 'A' && (c) <= 'Z') ? ((c) + ('a' - 'A')) : (c))
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int retro_strcasecmp__(const char *a, const char *b)
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{
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while (*a && *b)
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{
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int a_ = COMPAT_LOWER((unsigned char)*a);
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int b_ = COMPAT_LOWER((unsigned char)*b);
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if (a_ != b_)
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return a_ - b_;
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a++;
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b++;
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}
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return COMPAT_LOWER((unsigned char)*a) - COMPAT_LOWER((unsigned char)*b);
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}
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char *retro_strdup__(const char *orig)
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{
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size_t _len = strlen(orig) + 1;
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char *ret = (char*)malloc(_len);
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if (!ret)
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return NULL;
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memcpy(ret, orig, _len);
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return ret;
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}
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int retro_isblank__(int c)
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{
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return (c == ' ') || (c == '\t');
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}
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char *retro_strtok_r__(char *str, const char *delim, char **saveptr)
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{
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char *first = NULL;
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if (!saveptr || !delim)
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return NULL;
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if (str)
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*saveptr = str;
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do
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{
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char *ptr = NULL;
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first = *saveptr;
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while (*first && strchr(delim, *first))
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*first++ = '\0';
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if (*first == '\0')
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return NULL;
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ptr = first + 1;
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while (*ptr && !strchr(delim, *ptr))
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ptr++;
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*saveptr = ptr + (*ptr ? 1 : 0);
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*ptr = '\0';
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} while (strlen(first) == 0);
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return first;
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}
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#endif
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