1/* Copyright (c) 2013-2015 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "vfs.h"
  7
  8#include "util/string.h"
  9
 10#ifdef PSP2
 11#include "platform/psp2/sce-vfs.h"
 12#endif
 13#ifdef _3DS
 14#include "platform/3ds/3ds-vfs.h"
 15#endif
 16
 17struct VFile* VFileOpen(const char* path, int flags) {
 18#ifdef USE_VFS_FILE
 19	const char* chflags;
 20	switch (flags & O_ACCMODE) {
 21	case O_WRONLY:
 22		if (flags & O_APPEND) {
 23			chflags = "ab";
 24		} else {
 25			chflags = "wb";
 26		}
 27		break;
 28	case O_RDWR:
 29		if (flags & O_APPEND) {
 30			chflags = "a+b";
 31		} else if (flags & O_TRUNC) {
 32			chflags = "w+b";
 33		} else {
 34			chflags = "r+b";
 35		}
 36		break;
 37	case O_RDONLY:
 38		chflags = "rb";
 39		break;
 40	}
 41	return VFileFOpen(path, chflags);
 42#elif defined(PSP2)
 43	int sceFlags = PSP2_O_RDONLY;
 44	switch (flags & O_ACCMODE) {
 45	case O_WRONLY:
 46		sceFlags = PSP2_O_WRONLY;
 47		break;
 48	case O_RDWR:
 49		sceFlags = PSP2_O_RDWR;
 50		break;
 51	case O_RDONLY:
 52		sceFlags = PSP2_O_RDONLY;
 53		break;
 54	}
 55
 56	if (flags & O_APPEND) {
 57		sceFlags |= PSP2_O_APPEND;
 58	}
 59	if (flags & O_TRUNC) {
 60		sceFlags |= PSP2_O_TRUNC;
 61	}
 62	if (flags & O_CREAT) {
 63		sceFlags |= PSP2_O_CREAT;
 64	}
 65	return VFileOpenSce(path, sceFlags, 0666);
 66#elif defined(USE_VFS_3DS)
 67	int ctrFlags = FS_OPEN_READ;
 68	switch (flags & O_ACCMODE) {
 69	case O_WRONLY:
 70		ctrFlags = FS_OPEN_WRITE;
 71		break;
 72	case O_RDWR:
 73		ctrFlags = FS_OPEN_READ | FS_OPEN_WRITE;
 74		break;
 75	case O_RDONLY:
 76		ctrFlags = FS_OPEN_READ;
 77		break;
 78	}
 79
 80	if (flags & O_CREAT) {
 81		ctrFlags |= FS_OPEN_CREATE;
 82	}
 83	struct VFile* vf = VFileOpen3DS(&sdmcArchive, path, ctrFlags);
 84	if (!vf) {
 85		return 0;
 86	}
 87	if (flags & O_TRUNC) {
 88		vf->truncate(vf, 0);
 89	}
 90	if (flags & O_APPEND) {
 91		vf->seek(vf, vf->size(vf), SEEK_SET);
 92	}
 93	return vf;
 94#else
 95	return VFileOpenFD(path, flags);
 96#endif
 97}
 98
 99struct VDir* VDirOpenArchive(const char* path) {
100	struct VDir* dir = 0;
101#if defined(USE_LIBZIP) || defined(USE_ZLIB)
102	if (!dir) {
103		dir = VDirOpenZip(path, 0);
104	}
105#endif
106#if USE_LZMA
107	if (!dir) {
108		dir = VDirOpen7z(path, 0);
109	}
110#endif
111	return dir;
112}
113
114ssize_t VFileReadline(struct VFile* vf, char* buffer, size_t size) {
115	size_t bytesRead = 0;
116	while (bytesRead < size - 1) {
117		ssize_t newRead = vf->read(vf, &buffer[bytesRead], 1);
118		if (newRead <= 0) {
119			break;
120		}
121		bytesRead += newRead;
122		if (buffer[bytesRead - newRead] == '\n') {
123			break;
124		}
125	}
126	buffer[bytesRead] = '\0';
127	return bytesRead;
128}
129
130ssize_t VFileWrite32LE(struct VFile* vf, int32_t word) {
131	uint32_t leword;
132	STORE_32LE(word, 0, &leword);
133	return vf->write(vf, &leword, 4);
134}
135
136ssize_t VFileWrite16LE(struct VFile* vf, int16_t hword) {
137	uint16_t lehword;
138	STORE_16LE(hword, 0, &lehword);
139	return vf->write(vf, &lehword, 2);
140}
141
142ssize_t VFileRead32LE(struct VFile* vf, void* word) {
143	uint32_t leword;
144	ssize_t r = vf->read(vf, &leword, 4);
145	if (r == 4) {
146		STORE_32LE(leword, 0, word);
147	}
148	return r;
149}
150
151ssize_t VFileRead16LE(struct VFile* vf, void* hword) {
152	uint16_t lehword;
153	ssize_t r = vf->read(vf, &lehword, 2);
154	if (r == 2) {
155		STORE_16LE(lehword, 0, hword);
156	}
157	return r;
158}
159
160void separatePath(const char* path, char* dirname, char* basename, char* extension) {
161	if (!path) {
162		return;
163	}
164	char* dotPoint = strrchr(path, '.');
165	char* separatorPoint = strnrstr(path, PATH_SEP, strlen(path));
166	if (separatorPoint) {
167		if (dirname) {
168			ptrdiff_t len = separatorPoint - path;
169			if (PATH_MAX <= len) {
170				len = PATH_MAX - 1;
171			} else if (!len) {
172				len = 1;
173			}
174			strncpy(dirname, path, len);
175			dirname[len] = '\0';
176		}
177		path = separatorPoint + 1;
178	} else if (dirname) {
179		strcpy(dirname, ".");
180	}
181	if (basename) {
182		size_t len;
183		if (dotPoint) {
184			len = dotPoint - path;
185		} else {
186			len = strlen(path);
187		}
188		if (PATH_MAX <= len) {
189			len = PATH_MAX - 1;
190		}
191		strncpy(basename, path, len);
192		basename[len] = '\0';
193	}
194	if (extension) {
195		if (dotPoint) {
196			++dotPoint;
197			size_t len = strlen(dotPoint);
198			if (PATH_MAX <= len) {
199				len = PATH_MAX - 1;
200			}
201			strncpy(extension, dotPoint, len);
202			extension[len] = '\0';
203		} else {
204			extension[0] = '\0';
205		}
206	}
207}
208
209struct VFile* VDirFindFirst(struct VDir* dir, bool (*filter)(struct VFile*)) {
210	dir->rewind(dir);
211	struct VDirEntry* dirent = dir->listNext(dir);
212	while (dirent) {
213		struct VFile* vf = dir->openFile(dir, dirent->name(dirent), O_RDONLY);
214		if (!vf) {
215			dirent = dir->listNext(dir);
216			continue;
217		}
218		if (filter(vf)) {
219			return vf;
220		}
221		vf->close(vf);
222		dirent = dir->listNext(dir);
223	}
224	return 0;
225}
226
227struct VFile* VDirFindNextAvailable(struct VDir* dir, const char* basename, const char* infix, const char* suffix, int mode) {
228	if (!dir) {
229		return 0;
230	}
231	dir->rewind(dir);
232	struct VDirEntry* dirent;
233	size_t prefixLen = strlen(basename);
234	size_t infixLen = strlen(infix);
235	char path[PATH_MAX];
236	unsigned next = 0;
237	while ((dirent = dir->listNext(dir))) {
238		const char* filename = dirent->name(dirent);
239		const char* dotPoint = strrchr(filename, '.');
240		size_t len = strlen(filename);
241		if (dotPoint) {
242			len = (dotPoint - filename);
243		}
244		const char* separator = strnrstr(filename, infix, len);
245		if (!separator) {
246			continue;
247		}
248		len = separator - filename;
249		if (len != prefixLen) {
250			continue;
251		}
252		if (strncmp(filename, basename, prefixLen) == 0) {
253			int nlen;
254			separator += infixLen;
255			snprintf(path, PATH_MAX - 1, "%%u%s%%n", suffix);
256			unsigned increment;
257			if (sscanf(separator, path, &increment, &nlen) < 1) {
258				continue;
259			}
260			len = strlen(separator);
261			if (nlen < (ssize_t) len) {
262				continue;
263			}
264			if (next <= increment) {
265				next = increment + 1;
266			}
267		}
268	}
269	snprintf(path, PATH_MAX - 1, "%s%s%u%s", basename, infix, next, suffix);
270	path[PATH_MAX - 1] = '\0';
271	return dir->openFile(dir, path, mode);
272}