155 lines
2.9 KiB
C
155 lines
2.9 KiB
C
/*
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* Copyright 2013 (c) Anna Schumaker.
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*/
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#include <core/file.h>
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#include <core/string.h>
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#include <errno.h>
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#ifdef CONFIG_TESTING
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const gchar *OCARINA_DIR = "ocarina-test";
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#elif CONFIG_DEBUG
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const gchar *OCARINA_DIR = "ocarina-debug";
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#else
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const gchar *OCARINA_DIR = "ocarina";
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#endif
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#define REPORT_ERROR(fname) \
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printf("%s (%s:%d): %s: %s\n", __func__, __FILE__, __LINE__, fname, strerror(errno))
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static gchar *__file_path(gchar *name)
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{
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return g_strjoin("/", g_get_user_data_dir(), OCARINA_DIR, name, NULL);
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}
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static bool __file_mkdir()
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{
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gchar *dir = __file_path(NULL);
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int ret = g_mkdir_with_parents(dir, 0755);
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g_free(dir);
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if (ret != 0)
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REPORT_ERROR(dir);
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return ret == 0;
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}
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void file_init(struct file *file, const gchar *name, unsigned int version)
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{
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file->f_mode = OPEN_READ;
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file->f_version = version;
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file->f_prev = 0;
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file->f_file = NULL;
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g_strlcpy(file->f_name, (name == NULL) ? "" : name, FILE_MAX_LEN);
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}
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gchar *file_path(struct file *file)
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{
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if (strlen(file->f_name) != 0)
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return __file_path(file->f_name);
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return g_strdup("");
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}
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const unsigned int file_version(struct file *file)
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{
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if (file->f_file && (file->f_mode == OPEN_READ))
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return file->f_prev;
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return file->f_version;
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}
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bool file_exists(struct file *file)
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{
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gchar *path = file_path(file);
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bool ret = g_file_test(path, G_FILE_TEST_EXISTS);
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g_free(path);
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return ret;
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}
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static bool __file_open_common(struct file *file, enum open_mode mode)
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{
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gchar *path = file_path(file);
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file->f_file = g_fopen(path, (mode == OPEN_READ) ? "r" : "w");
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g_free(path);
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if (!file->f_file) {
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REPORT_ERROR(file->f_name);
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return false;
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}
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file->f_mode = mode;
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return true;
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}
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static bool __file_open_read(struct file *file)
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{
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if (!file_exists(file))
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return false;
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if (!__file_open_common(file, OPEN_READ))
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return false;
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return file_readf(file, "%u\n", &file->f_prev) == 1;
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}
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static bool __file_open_write(struct file *file)
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{
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if (!__file_mkdir())
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return false;
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if (!__file_open_common(file, OPEN_WRITE))
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return false;
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return file_writef(file, "%d\n", file->f_version) > 0;
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}
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bool file_open(struct file *file, enum open_mode mode)
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{
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if ((strlen(file->f_name) == 0) || (file->f_file != NULL))
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return false;
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if (mode == OPEN_READ)
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return __file_open_read(file);
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return __file_open_write(file);
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}
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void file_close(struct file *file)
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{
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if (file->f_file)
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fclose(file->f_file);
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file->f_file = NULL;
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}
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int file_readf(struct file *file, const char *fmt, ...)
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{
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va_list argp;
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int ret;
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va_start(argp, fmt);
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ret = vfscanf(file->f_file, fmt, argp);
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va_end(argp);
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return ret;
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}
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gchar *file_readl(struct file *file)
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{
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gchar *res;
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if (file_readf(file, "%m[^\n]\n", &res) == 0)
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return g_strdup("");
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g_strstrip(res);
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return res;
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}
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int file_writef(struct file *file, const char *fmt, ...)
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{
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va_list argp;
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int ret;
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va_start(argp, fmt);
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ret = g_vfprintf(file->f_file, fmt, argp);
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va_end(argp);
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if (ret < 0)
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REPORT_ERROR(file->f_name);
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return ret;
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}
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