static int tifiles_file_has_tib_header(const char *filename)
{
FILE *f;
char str[128];
char *e = tifiles_fext_get(filename);
if (!strcmp(e, ""))
return 0;
if(g_ascii_strcasecmp(e, "tib"))
return 0;
f = g_fopen(filename, "rb");
if(f == NULL)
return 0;
fread_n_chars(f, 22, str);
fread_n_chars(f, strlen(TIB_SIGNATURE), str);
str[strlen(TIB_SIGNATURE)] = '\0';
if(!strcmp(str, TIB_SIGNATURE))
{
fclose(f);
return !0;
}
return 0;
}
TIEXPORT2 int TICALL tifiles_file_has_tno_header(const char *filename)
{
FILE *f;
char str[128];
char *e = tifiles_fext_get(filename);
int ret = 0;
if (!strcmp(e, ""))
{
return ret;
}
if(g_ascii_strcasecmp(e, "tno") && g_ascii_strcasecmp(e, "tnc") && g_ascii_strcasecmp(e, "tco") && g_ascii_strcasecmp(e, "tcc"))
{
return ret;
}
f = g_fopen(filename, "rb");
if(f == NULL)
{
return ret;
}
if (fread_n_chars(f, 63, str) == 0)
{
if ( !strncmp(str, TNO_SIGNATURE, 14)
|| !strncmp(str, TNC_SIGNATURE, 14)
|| !strncmp(str, TNO_NOSAMPLES_SIGNATURE, 24)
|| !strncmp(str, TCO_SIGNATURE, 14)
|| !strncmp(str, TCC_SIGNATURE, 14)
)
{
ret = !0;
}
}
fclose(f);
return ret;
}
/**
* ti9x_file_read_regular:
* @filename: name of single/group file to open.
* @content: where to store the file content.
*
* Load the single/group file into a Ti9xRegular structure.
*
* Structure content must be freed with #tifiles_content_delete_regular when
* no longer used. If error occurs, the structure content is released for you.
*
* Return value: an error code, 0 otherwise.
**/
int ti9x_file_read_regular(const char *filename, Ti9xRegular *content)
{
FILE *f;
long cur_pos;
char default_folder[FLDNAME_MAX];
char current_folder[FLDNAME_MAX];
uint32_t curr_offset = 0;
uint32_t next_offset = 0;
uint32_t file_size;
uint16_t tmp;
unsigned int i, j;
char signature[9];
char varname[VARNAME_MAX];
int ret = ERR_FILE_IO;
if (content == NULL)
{
tifiles_critical("%s: an argument is NULL", __FUNCTION__);
return ERR_INVALID_FILE;
}
if (!tifiles_file_is_regular(filename))
{
ret = ERR_INVALID_FILE;
goto tfrr2;
}
f = g_fopen(filename, "rb");
if (f == NULL)
{
ret = ERR_FILE_OPEN;
goto tfrr2;
}
// Get file size, then rewind.
if (fseek(f, 0, SEEK_END) < 0) goto tfrr;
cur_pos = ftell(f);
if (cur_pos < 0) goto tfrr;
if (fseek(f, 0, SEEK_SET) < 0) goto tfrr;
// The TI-68k series' members have at best 4 MB of Flash (TODO: modify this code if this no longer holds).
// Regular / group files larger than that size are highly dubious, files larger than twice that size are insane.
if (cur_pos >= (8L << 20))
{
ret = ERR_INVALID_FILE;
goto tfrr;
}
file_size = (uint32_t)cur_pos;
if (fread_8_chars(f, signature) < 0) goto tfrr; // Offset 0
content->model = tifiles_signature2calctype(signature);
if (content->model == CALC_NONE)
{
ret = ERR_INVALID_FILE;
goto tfrr;
}
if (content->model_dst == CALC_NONE)
{
content->model_dst = content->model;
}
if (fread_word(f, NULL) < 0) goto tfrr; // Offset 0x8
if (fread_8_chars(f, default_folder) < 0) goto tfrr; // Offset 0xA
ticonv_varname_from_tifile_sn(content->model_dst, default_folder, content->default_folder, sizeof(content->default_folder), -1);
strncpy(current_folder, content->default_folder, sizeof(current_folder) - 1);
current_folder[sizeof(current_folder) - 1] = 0;
if (fread_n_chars(f, 40, content->comment) < 0) goto tfrr; // Offset 0x12
if (fread_word(f, &tmp) < 0) goto tfrr; // Offset 0x3A
content->num_entries = tmp;
content->entries = g_malloc0((content->num_entries + 1) * sizeof(VarEntry*));
if (content->entries == NULL)
{
ret = ERR_MALLOC;
goto tfrr;
}
for (i = 0, j = 0; i < content->num_entries; i++)
{
VarEntry *entry = content->entries[j] = g_malloc0(sizeof(VarEntry));
if (fread_long(f, &curr_offset) < 0) goto tfrr; // Offset N, 0x3C for the first entry
if (curr_offset > file_size)
{
ret = ERR_INVALID_FILE;
goto tfrr;
}
if (fread_8_chars(f, varname) < 0) goto tfrr; // Offset N+4, 0x40 for the first entry
ticonv_varname_from_tifile_sn(content->model_dst, varname, entry->name, sizeof(entry->name), entry->type);
if (fread_byte(f, &(entry->type)) < 0) goto tfrr; // Offset N+12, 0x48 for the first entry
if (fread_byte(f, &(entry->attr)) < 0) goto tfrr; // Offset N+13, 0x49 for the first entry
entry->attr = (entry->attr == 2 || entry->attr == 3) ? ATTRB_ARCHIVED : entry->attr;
if (fread_word(f, NULL) < 0) goto tfrr; // Offset N+14, 0x4A for the first entry
if (entry->type == TI92_DIR) // same as TI89_DIR, TI89t_DIR, ...
{
strncpy(current_folder, entry->name,sizeof(current_folder) - 1);
current_folder[sizeof(current_folder) - 1] = 0;
g_free(entry);
continue; // folder: skip entry
}
else
{
uint16_t checksum, sum = 0;
j++;
strncpy(entry->folder, current_folder, sizeof(entry->folder) - 1);
current_folder[sizeof(entry->folder) - 1] = 0;
cur_pos = ftell(f);
if (cur_pos < 0) goto tfrr;
if (fread_long(f, &next_offset) < 0) goto tfrr; // Offset N+16, 0x4C for the first entry
if (next_offset > file_size)
{
ret = ERR_INVALID_FILE;
goto tfrr;
}
entry->size = next_offset - curr_offset - 4 - 2;
if (entry->size > file_size)
{
ret = ERR_INVALID_FILE;
goto tfrr;
}
entry->data = (uint8_t *)g_malloc0(entry->size);
if (entry->data == NULL)
{
ret = ERR_MALLOC;
goto tfrr;
}
if (fseek(f, curr_offset, SEEK_SET)) goto tfrr;
if (fread_long(f, NULL) < 0) goto tfrr; // Normally: offset N+22, 0x52 for the first entry
if (fread(entry->data, 1, entry->size, f) < entry->size) goto tfrr; // Normally: offset N+26, 0x56 for the first entry
if (fread_word(f, &checksum) < 0) goto tfrr;
if (fseek(f, cur_pos, SEEK_SET)) goto tfrr;
sum = tifiles_checksum(entry->data, entry->size);
if (sum != checksum)
{
ret = ERR_FILE_CHECKSUM;
goto tfrr;
}
content->checksum += sum; // sum of all checksums but unused
}
}
content->num_entries = j;
content->entries = g_realloc(content->entries, content->num_entries * sizeof(VarEntry*));
//fread_long(f, &next_offset);
//fseek(f, next_offset - 2, SEEK_SET);
//fread_word(f, &(content->checksum));
fclose(f);
return 0;
tfrr: // release on exit
tifiles_critical("%s: error reading / understanding file %s", __FUNCTION__, filename);
fclose(f);
tfrr2:
tifiles_content_delete_regular(content);
return ret;
}
/**
* ti9x_file_read_backup:
* @filename: name of backup file to open.
* @content: where to store the file content.
*
* Load the backup file into a Ti9xBackup structure.
*
* Structure content must be freed with #tifiles_content_delete_backup when
* no longer used. If error occurs, the structure content is released for you.
*
* Return value: an error code, 0 otherwise.
**/
int ti9x_file_read_backup(const char *filename, Ti9xBackup *content)
{
FILE *f;
long cur_pos = 0;
uint32_t file_size;
char signature[9];
uint16_t sum;
int ret = ERR_FILE_IO;
if (content == NULL)
{
tifiles_critical("%s: an argument is NULL", __FUNCTION__);
return ERR_INVALID_FILE;
}
if (!tifiles_file_is_backup(filename))
{
ret = ERR_INVALID_FILE;
goto tfrb2;
}
f = g_fopen(filename, "rb");
if (f == NULL)
{
tifiles_info( "Unable to open this file: %s", filename);
ret = ERR_FILE_OPEN;
goto tfrb2;
}
// Get file size, then rewind.
if (fseek(f, 0, SEEK_END) < 0) goto tfrb;
cur_pos = ftell(f);
if (cur_pos < 0) goto tfrb;
if (fseek(f, 0, SEEK_SET) < 0) goto tfrb;
// The TI-68k series' members have at best 4 MB of Flash (TODO: modify this code if this no longer holds).
// Backup files larger than that size are highly dubious, files larger than twice that size are insane.
if (cur_pos >= (8L << 20))
{
ret = ERR_INVALID_FILE;
goto tfrb;
}
if (fread_8_chars(f, signature) < 0) goto tfrb;
content->model = tifiles_signature2calctype(signature);
if (content->model == CALC_NONE)
{
ret = ERR_INVALID_FILE;
}
if (fread_word(f, NULL) < 0) goto tfrb;
if (fread_8_chars(f, NULL) < 0) goto tfrb;
if (fread_n_chars(f, 40, content->comment) < 0) goto tfrb;
if (fread_word(f, NULL) < 0) goto tfrb;
if (fread_long(f, NULL) < 0) goto tfrb;
if (fread_8_chars(f, content->rom_version) < 0) goto tfrb;
if (fread_byte(f, &(content->type)) < 0) goto tfrb;
if (fread_byte(f, NULL) < 0) goto tfrb;
if (fread_word(f, NULL) < 0) goto tfrb;
if (fread_long(f, &file_size) < 0) goto tfrb;
if (file_size > (uint32_t)cur_pos)
{
ret = ERR_INVALID_FILE;
goto tfrb;
}
content->data_length = file_size - 0x52 - 2;
if (fread_word(f, NULL) < 0) goto tfrb;
content->data_part = (uint8_t *)g_malloc0(content->data_length);
if (content->data_part == NULL)
{
ret = ERR_MALLOC;
goto tfrb;
}
if (fread(content->data_part, 1, content->data_length, f) < content->data_length) goto tfrb;
if (fread_word(f, &(content->checksum)) < 0) goto tfrb;
sum = tifiles_checksum(content->data_part, content->data_length);
#if defined(CHECKSUM_ENABLED)
if (sum != content->checksum)
{
ret = ERR_FILE_CHECKSUM;
goto tfrb;
}
#endif
fclose(f);
return 0;
tfrb: // release on exit
tifiles_critical("%s: error reading / understanding file %s", __FUNCTION__, filename);
fclose(f);
tfrb2:
tifiles_content_delete_backup(content);
return ret;
}
int fread_8_chars(FILE * f, char *s)
{
return fread_n_chars(f, 8, s);
}
/**
* tifiles_file_test:
* @filename: a filename as string.
* @type: type to check
* @target: hand-held model or CALC_NONE for no filtering
*
* Check whether #filename is a TI file of type #type useable on a #target model.
* This function is a generic one which overwrap and extends the tifiles_file_is_*
* functions.
*
* This is a powerful function which allows checking of a specific file type for
* a given target.
*
* Return value: a boolean value.
**/
TIEXPORT2 int TICALL tifiles_file_test(const char *filename, FileClass type, CalcModel target)
{
char *e = tifiles_fext_get(filename);
if (!tifiles_file_is_ti(filename))
return 0;
if (!strcmp(e, ""))
return 0;
if(target > CALC_MAX)
{
tifiles_critical("tifiles_file_test: invalid target argument! This is a bug.");
return 0;
}
if(type & TIFILE_SINGLE)
{
if(target && !g_ascii_strncasecmp(e, GROUP_FILE_EXT[target], 2))
return !0;
else
return tifiles_file_is_single(filename);
}
if(type & TIFILE_GROUP)
{
if(target && !g_ascii_strcasecmp(e, GROUP_FILE_EXT[target]))
return !0;
else
return tifiles_file_is_group(filename);
}
if(type & TIFILE_REGULAR)
{
return tifiles_file_test(filename, TIFILE_SINGLE, target) ||
tifiles_file_test(filename, TIFILE_GROUP, target);
}
if(type & TIFILE_BACKUP)
{
if(target && !g_ascii_strcasecmp(e, BACKUP_FILE_EXT[target]))
return !0;
else
return tifiles_file_is_backup(filename);
}
if(type & TIFILE_OS)
{
if(target && !g_ascii_strcasecmp(e, FLASH_OS_FILE_EXT[target]))
return !0;
else if(target && tifiles_file_is_tib(filename))
{
FILE *f;
uint8_t data[16];
f = g_fopen(filename, "rb");
if(f == NULL)
return 0;
fread_n_chars(f, 16, (char *)data);
fclose(f);
switch(data[8])
{
case 1: if(target != CALC_TI92P) return 0;
case 3: if(target != CALC_TI89) return 0;
case 8: if(target != CALC_V200) return 0;
case 9: if(target != CALC_TI89T) return 0;
}
return !0;
}
else
return tifiles_file_is_os(filename);
}
if(type & TIFILE_APP)
{
if(target && !g_ascii_strcasecmp(e, FLASH_APP_FILE_EXT[target]))
return !0;
else
return tifiles_file_is_app(filename);
}
if(type & TIFILE_FLASH)
{
return tifiles_file_test(filename, TIFILE_OS, target) ||
tifiles_file_test(filename, TIFILE_APP, target);
}
if(type & TIFILE_TIGROUP)
{
if(target)
{
// No easy/light way for this part: we have to load the whole file
// and to parse the TigEntry structures.
TigContent *content;
int ret, ok=0;
int k;
if(!tifiles_file_has_tig_header(filename))
return 0;
content = tifiles_content_create_tigroup(CALC_NONE, 0);
ret = tifiles_file_read_tigroup(filename, content);
if(ret) return 0;
for (k = 0; k < content->n_apps; k++)
{
TigEntry *te = content->app_entries[k];
if(tifiles_calc_are_compat(te->content.regular->model, target))
ok++;
}
for (k = 0; k < content->n_vars; k++)
{
TigEntry *te = content->var_entries[k];
if(tifiles_calc_are_compat(te->content.regular->model, target))
ok++;
}
tifiles_content_delete_tigroup(content);
return ok;
}
else
return tifiles_file_is_tigroup(filename);
}
return 0;
}
/**
* ti9x_file_read_regular:
* @filename: name of single/group file to open.
* @content: where to store the file content.
*
* Load the single/group file into a Ti9xRegular structure.
*
* Structure content must be freed with #tifiles_content_delete_regular when
* no longer used. If error occurs, the structure content is released for you.
*
* Return value: an error code, 0 otherwise.
**/
int ti9x_file_read_regular(const char *filename, Ti9xRegular *content)
{
FILE *f;
long cur_pos = 0;
char default_folder[FLDNAME_MAX];
char current_folder[FLDNAME_MAX];
uint32_t curr_offset = 0;
uint32_t next_offset = 0;
uint16_t tmp;
int i, j;
char signature[9];
char varname[VARNAME_MAX];
if (!tifiles_file_is_regular(filename))
{
return ERR_INVALID_FILE;
}
if (content == NULL)
{
tifiles_critical("%s: an argument is NULL", __FUNCTION__);
return ERR_INVALID_FILE;
}
f = g_fopen(filename, "rb");
if (f == NULL)
{
tifiles_info( "Unable to open this file: %s", filename);
return ERR_FILE_OPEN;
}
if(fread_8_chars(f, signature) < 0) goto tffr;
content->model = tifiles_signature2calctype(signature);
if (content->model == CALC_NONE)
{
return ERR_INVALID_FILE;
}
if(content->model_dst == CALC_NONE)
{
content->model_dst = content->model;
}
if(fread_word(f, NULL) < 0) goto tffr;
if(fread_8_chars(f, default_folder) < 0) goto tffr;
ticonv_varname_from_tifile_s(content->model_dst, default_folder, content->default_folder, -1);
strcpy(current_folder, content->default_folder);
if(fread_n_chars(f, 40, content->comment) < 0) goto tffr;
if(fread_word(f, &tmp) < 0) goto tffr;
content->num_entries = tmp;
content->entries = g_malloc0((content->num_entries + 1) * sizeof(VarEntry*));
if (content->entries == NULL)
{
fclose(f);
return ERR_MALLOC;
}
for (i = 0, j = 0; i < content->num_entries; i++)
{
VarEntry *entry = content->entries[j] = g_malloc0(sizeof(VarEntry));
if(fread_long(f, &curr_offset) < 0) goto tffr;
if(fread_8_chars(f, varname) < 0) goto tffr;
ticonv_varname_from_tifile_s(content->model_dst, varname, entry->name, entry->type);
if(fread_byte(f, &(entry->type)) < 0) goto tffr;
if(fread_byte(f, &(entry->attr)) < 0) goto tffr;
entry->attr = (entry->attr == 2 || entry->attr == 3) ? ATTRB_ARCHIVED : entry->attr;
if(fread_word(f, NULL) < 0) goto tffr;
if (entry->type == TI92_DIR) // same as TI89_DIR, TI89t_DIR, ...
{
strcpy(current_folder, entry->name);
g_free(entry);
continue; // folder: skip entry
}
else
{
uint16_t checksum, sum = 0;
j++;
strcpy(entry->folder, current_folder);
cur_pos = ftell(f);
if(cur_pos == -1L) goto tffr;
if(fread_long(f, &next_offset) < 0) goto tffr;
entry->size = next_offset - curr_offset - 4 - 2;
entry->data = (uint8_t *)g_malloc0(entry->size);
if (entry->data == NULL)
{
fclose(f);
tifiles_content_delete_regular(content);
return ERR_MALLOC;
}
if(fseek(f, curr_offset, SEEK_SET)) goto tffr;
if(fread_long(f, NULL) < 0) goto tffr; // 4 bytes (NULL)
if(fread(entry->data, 1, entry->size, f) < entry->size) goto tffr;
if(fread_word(f, &checksum) < 0) goto tffr;
if(fseek(f, cur_pos, SEEK_SET)) goto tffr;
sum = tifiles_checksum(entry->data, entry->size);
if(sum != checksum)
{
fclose(f);
tifiles_content_delete_regular(content);
return ERR_FILE_CHECKSUM;
}
content->checksum += sum; // sum of all checksums but unused
}
}
content->num_entries = j;
content->entries = g_realloc(content->entries, content->num_entries * sizeof(VarEntry*));
//fread_long(f, &next_offset);
//fseek(f, next_offset - 2, SEEK_SET);
//fread_word(f, &(content->checksum));
fclose(f);
return 0;
tffr: // release on exit
tifiles_critical("%s: error reading / understanding file %s", __FUNCTION__, filename);
fclose(f);
tifiles_content_delete_regular(content);
return ERR_FILE_IO;
}
/**
* ti9x_file_read_backup:
* @filename: name of backup file to open.
* @content: where to store the file content.
*
* Load the backup file into a Ti9xBackup structure.
*
* Structure content must be freed with #tifiles_content_delete_backup when
* no longer used. If error occurs, the structure content is released for you.
*
* Return value: an error code, 0 otherwise.
**/
int ti9x_file_read_backup(const char *filename, Ti9xBackup *content)
{
FILE *f;
uint32_t file_size;
char signature[9];
uint16_t sum;
if (!tifiles_file_is_backup(filename))
{
return ERR_INVALID_FILE;
}
f = g_fopen(filename, "rb");
if (f == NULL)
{
tifiles_info( "Unable to open this file: %s", filename);
return ERR_FILE_OPEN;
}
if (content == NULL)
{
tifiles_critical("%s: an argument is NULL", __FUNCTION__);
return ERR_INVALID_FILE;
}
if(fread_8_chars(f, signature) < 0) goto tfrb;
content->model = tifiles_signature2calctype(signature);
if (content->model == CALC_NONE)
{
return ERR_INVALID_FILE;
}
if(fread_word(f, NULL) < 0) goto tfrb;
if(fread_8_chars(f, NULL) < 0) goto tfrb;
if(fread_n_chars(f, 40, content->comment) < 0) goto tfrb;
if(fread_word(f, NULL) < 0) goto tfrb;
if(fread_long(f, NULL) < 0) goto tfrb;
if(fread_8_chars(f, content->rom_version) < 0) goto tfrb;
if(fread_byte(f, &(content->type)) < 0) goto tfrb;
if(fread_byte(f, NULL) < 0) goto tfrb;
if(fread_word(f, NULL) < 0) goto tfrb;
if(fread_long(f, &file_size) < 0) goto tfrb;
content->data_length = file_size - 0x52 - 2;
if(fread_word(f, NULL) < 0) goto tfrb;
content->data_part = (uint8_t *)g_malloc0(content->data_length);
if (content->data_part == NULL)
{
fclose(f);
tifiles_content_delete_backup(content);
return ERR_MALLOC;
}
if(fread(content->data_part, 1, content->data_length, f) < content->data_length) goto tfrb;
if(fread_word(f, &(content->checksum)) < 0) goto tfrb;
sum = tifiles_checksum(content->data_part, content->data_length);
#if defined(CHECKSUM_ENABLED)
if(sum != content->checksum)
{
fclose(f);
tifiles_content_delete_backup(content);
return ERR_FILE_CHECKSUM;
}
#endif
fclose(f);
return 0;
tfrb: // release on exit
tifiles_critical("%s: error reading / understanding file %s", __FUNCTION__, filename);
fclose(f);
tifiles_content_delete_backup(content);
return ERR_FILE_IO;
}
