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#ifdef PSP2
  9#include "platform/psp2/sce-vfs.h"
 10#endif
 11
 12struct VFile* VFileOpen(const char* path, int flags) {
 13#ifdef USE_VFS_FILE
 14	const char* chflags;
 15	switch (flags & O_ACCMODE) {
 16	case O_WRONLY:
 17		if (flags & O_APPEND) {
 18			chflags = "ab";
 19		} else {
 20			chflags = "wb";
 21		}
 22		break;
 23	case O_RDWR:
 24		if (flags & O_APPEND) {
 25			chflags = "a+b";
 26		} else if (flags & O_TRUNC) {
 27			chflags = "w+b";
 28		} else {
 29			chflags = "r+b";
 30		}
 31		break;
 32	case O_RDONLY:
 33		chflags = "rb";
 34		break;
 35	}
 36	return VFileFOpen(path, chflags);
 37#elif defined(PSP2)
 38	return VFileOpenSce(path, flags, 0666);
 39#else
 40	return VFileOpenFD(path, flags);
 41#endif
 42}
 43
 44ssize_t VFileReadline(struct VFile* vf, char* buffer, size_t size) {
 45	size_t bytesRead = 0;
 46	while (bytesRead < size - 1) {
 47		ssize_t newRead = vf->read(vf, &buffer[bytesRead], 1);
 48		if (newRead <= 0) {
 49			break;
 50		}
 51		bytesRead += newRead;
 52		if (buffer[bytesRead] == '\n') {
 53			break;
 54		}
 55	}
 56	buffer[bytesRead] = '\0';
 57	return bytesRead;
 58}
 59
 60ssize_t VFileWrite32LE(struct VFile* vf, int32_t word) {
 61	uint32_t leword;
 62	STORE_32LE(word, 0, &leword);
 63	return vf->write(vf, &leword, 4);
 64}
 65
 66ssize_t VFileWrite16LE(struct VFile* vf, int16_t hword) {
 67	uint16_t lehword;
 68	STORE_16LE(hword, 0, &lehword);
 69	return vf->write(vf, &lehword, 2);
 70}
 71
 72ssize_t VFileRead32LE(struct VFile* vf, void* word) {
 73	uint32_t leword;
 74	ssize_t r = vf->read(vf, &leword, 4);
 75	if (r == 4) {
 76		STORE_32LE(leword, 0, word);
 77	}
 78	return r;
 79}
 80
 81ssize_t VFileRead16LE(struct VFile* vf, void* hword) {
 82	uint16_t lehword;
 83	ssize_t r = vf->read(vf, &lehword, 2);
 84	if (r == 2) {
 85		STORE_16LE(lehword, 0, hword);
 86	}
 87	return r;
 88}
 89
 90struct VFile* VDirOptionalOpenFile(struct VDir* dir, const char* realPath, const char* prefix, const char* suffix, int mode) {
 91	char path[PATH_MAX];
 92	path[PATH_MAX - 1] = '\0';
 93	struct VFile* vf;
 94	if (!dir) {
 95		if (!realPath) {
 96			return 0;
 97		}
 98		char* dotPoint = strrchr(realPath, '.');
 99		if (dotPoint - realPath + 1 >= PATH_MAX - 1) {
100			return 0;
101		}
102		if (dotPoint > strrchr(realPath, '/')) {
103			int len = dotPoint - realPath;
104			strncpy(path, realPath, len);
105			path[len] = 0;
106			strncat(path + len, suffix, PATH_MAX - len - 1);
107		} else {
108			snprintf(path, PATH_MAX - 1, "%s%s", realPath, suffix);
109		}
110		vf = VFileOpen(path, mode);
111	} else {
112		snprintf(path, PATH_MAX - 1, "%s%s", prefix, suffix);
113		vf = dir->openFile(dir, path, mode);
114	}
115	return vf;
116}