ref: 259fc72c13c4e155415c1e9cc07a3f46be86a8d9
dir: /src/m_misc.c/
// // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 1993-2008 Raven Software // Copyright(C) 2005-2014 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // DESCRIPTION: // Miscellaneous. // #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #include <errno.h> #ifdef _WIN32 #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <io.h> #ifdef _MSC_VER #include <direct.h> #endif #else #include <sys/stat.h> #include <sys/types.h> #endif #include "doomtype.h" #include "deh_str.h" #include "i_swap.h" #include "i_system.h" #include "i_video.h" #include "m_misc.h" #include "v_video.h" #include "w_wad.h" #include "z_zone.h" // // Create a directory // void M_MakeDirectory(char *path) { #ifdef _WIN32 mkdir(path); #else mkdir(path, 0755); #endif } // Check if a file exists boolean M_FileExists(char *filename) { FILE *fstream; fstream = fopen(filename, "r"); if (fstream != NULL) { fclose(fstream); return true; } else { // If we can't open because the file is a directory, the // "file" exists at least! return errno == EISDIR; } } // // Determine the length of an open file. // long M_FileLength(FILE *handle) { long savedpos; long length; // save the current position in the file savedpos = ftell(handle); // jump to the end and find the length fseek(handle, 0, SEEK_END); length = ftell(handle); // go back to the old location fseek(handle, savedpos, SEEK_SET); return length; } // // M_WriteFile // boolean M_WriteFile(char *name, void *source, int length) { FILE *handle; int count; handle = fopen(name, "wb"); if (handle == NULL) return false; count = fwrite(source, 1, length, handle); fclose(handle); if (count < length) return false; return true; } // // M_ReadFile // int M_ReadFile(char *name, byte **buffer) { FILE *handle; int count, length; byte *buf; handle = fopen(name, "rb"); if (handle == NULL) I_Error ("Couldn't read file %s", name); // find the size of the file by seeking to the end and // reading the current position length = M_FileLength(handle); buf = Z_Malloc (length, PU_STATIC, NULL); count = fread(buf, 1, length, handle); fclose (handle); if (count < length) I_Error ("Couldn't read file %s", name); *buffer = buf; return length; } // Returns the path to a temporary file of the given name, stored // inside the system temporary directory. // // The returned value must be freed with Z_Free after use. char *M_TempFile(char *s) { char *tempdir; #ifdef _WIN32 // Check the TEMP environment variable to find the location. tempdir = getenv("TEMP"); if (tempdir == NULL) { tempdir = "."; } #else // In Unix, just use /tmp. tempdir = "/tmp"; #endif return M_StringJoin(tempdir, DIR_SEPARATOR_S, s, NULL); } boolean M_StrToInt(const char *str, int *result) { return sscanf(str, " 0x%x", result) == 1 || sscanf(str, " 0X%x", result) == 1 || sscanf(str, " 0%o", result) == 1 || sscanf(str, " %d", result) == 1; } void M_ExtractFileBase(char *path, char *dest) { char *src; char *filename; int length; src = path + strlen(path) - 1; // back up until a \ or the start while (src != path && *(src - 1) != DIR_SEPARATOR) { src--; } filename = src; // Copy up to eight characters // Note: Vanilla Doom exits with an error if a filename is specified // with a base of more than eight characters. To remove the 8.3 // filename limit, instead we simply truncate the name. length = 0; memset(dest, 0, 8); while (*src != '\0' && *src != '.') { if (length >= 8) { printf("Warning: Truncated '%s' lump name to '%.8s'.\n", filename, dest); break; } dest[length++] = toupper((int)*src++); } } //--------------------------------------------------------------------------- // // PROC M_ForceUppercase // // Change string to uppercase. // //--------------------------------------------------------------------------- void M_ForceUppercase(char *text) { char *p; for (p = text; *p != '\0'; ++p) { *p = toupper(*p); } } // // M_StrCaseStr // // Case-insensitive version of strstr() // char *M_StrCaseStr(char *haystack, char *needle) { unsigned int haystack_len; unsigned int needle_len; unsigned int len; unsigned int i; haystack_len = strlen(haystack); needle_len = strlen(needle); if (haystack_len < needle_len) { return NULL; } len = haystack_len - needle_len; for (i = 0; i <= len; ++i) { if (!strncasecmp(haystack + i, needle, needle_len)) { return haystack + i; } } return NULL; } // // Safe version of strdup() that checks the string was successfully // allocated. // char *M_StringDuplicate(const char *orig) { char *result; result = strdup(orig); if (result == NULL) { I_Error("Failed to duplicate string (length %i)\n", strlen(orig)); } return result; } // // String replace function. // char *M_StringReplace(const char *haystack, const char *needle, const char *replacement) { char *result, *dst; const char *p; size_t needle_len = strlen(needle); size_t result_len, dst_len; // Iterate through occurrences of 'needle' and calculate the size of // the new string. result_len = strlen(haystack) + 1; p = haystack; for (;;) { p = strstr(p, needle); if (p == NULL) { break; } p += needle_len; result_len += strlen(replacement) - needle_len; } // Construct new string. result = malloc(result_len); if (result == NULL) { I_Error("M_StringReplace: Failed to allocate new string"); return NULL; } dst = result; dst_len = result_len; p = haystack; while (*p != '\0') { if (!strncmp(p, needle, needle_len)) { M_StringCopy(dst, replacement, dst_len); p += needle_len; dst += strlen(replacement); dst_len -= strlen(replacement); } else { *dst = *p; ++dst; --dst_len; ++p; } } *dst = '\0'; return result; } // Safe string copy function that works like OpenBSD's strlcpy(). // Returns true if the string was not truncated. boolean M_StringCopy(char *dest, const char *src, size_t dest_size) { size_t len; if (dest_size >= 1) { dest[dest_size - 1] = '\0'; strncpy(dest, src, dest_size - 1); } else { return false; } len = strlen(dest); return src[len] == '\0'; } // Safe string concat function that works like OpenBSD's strlcat(). // Returns true if string not truncated. boolean M_StringConcat(char *dest, const char *src, size_t dest_size) { size_t offset; offset = strlen(dest); if (offset > dest_size) { offset = dest_size; } return M_StringCopy(dest + offset, src, dest_size - offset); } // Returns true if 's' begins with the specified prefix. boolean M_StringStartsWith(const char *s, const char *prefix) { return strlen(s) > strlen(prefix) && strncmp(s, prefix, strlen(prefix)) == 0; } // Returns true if 's' ends with the specified suffix. boolean M_StringEndsWith(const char *s, const char *suffix) { return strlen(s) >= strlen(suffix) && strcmp(s + strlen(s) - strlen(suffix), suffix) == 0; } // Return a newly-malloced string with all the strings given as arguments // concatenated together. char *M_StringJoin(const char *s, ...) { char *result; const char *v; va_list args; size_t result_len; result_len = strlen(s) + 1; va_start(args, s); for (;;) { v = va_arg(args, const char *); if (v == NULL) { break; } result_len += strlen(v); } va_end(args); result = malloc(result_len); if (result == NULL) { I_Error("M_StringJoin: Failed to allocate new string."); return NULL; } M_StringCopy(result, s, result_len); va_start(args, s); for (;;) { v = va_arg(args, const char *); if (v == NULL) { break; } M_StringConcat(result, v, result_len); } va_end(args); return result; } // On Windows, vsnprintf() is _vsnprintf(). #ifdef _WIN32 #if _MSC_VER < 1400 /* not needed for Visual Studio 2008 */ #define vsnprintf _vsnprintf #endif #endif // Safe, portable vsnprintf(). int M_vsnprintf(char *buf, size_t buf_len, const char *s, va_list args) { int result; if (buf_len < 1) { return 0; } // Windows (and other OSes?) has a vsnprintf() that doesn't always // append a trailing \0. So we must do it, and write into a buffer // that is one byte shorter; otherwise this function is unsafe. result = vsnprintf(buf, buf_len, s, args); // If truncated, change the final char in the buffer to a \0. // A negative result indicates a truncated buffer on Windows. if (result < 0 || result >= buf_len) { buf[buf_len - 1] = '\0'; result = buf_len - 1; } return result; } // Safe, portable snprintf(). int M_snprintf(char *buf, size_t buf_len, const char *s, ...) { va_list args; int result; va_start(args, s); result = M_vsnprintf(buf, buf_len, s, args); va_end(args); return result; } #ifdef _WIN32 char *M_OEMToUTF8(const char *oem) { unsigned int len = strlen(oem) + 1; wchar_t *tmp; char *result; tmp = malloc(len * sizeof(wchar_t)); MultiByteToWideChar(CP_OEMCP, 0, oem, len, tmp, len); result = malloc(len * 4); WideCharToMultiByte(CP_UTF8, 0, tmp, len, result, len * 4, NULL, NULL); free(tmp); return result; } #endif