static int tifiles_file_has_ti_header(const char *filename)
{
FILE *f;
char buf[9];
char *p;
f = g_fopen(filename, "rb");
if (f == NULL)
return 0;
fread_8_chars(f, buf);
for(p = buf; *p != '\0'; p++)
*p = toupper(*p);
if (!strcmp(buf, "**TI73**") || !strcmp(buf, "**TI82**") ||
!strcmp(buf, "**TI83**") || !strcmp(buf, "**TI83F*") ||
!strcmp(buf, "**TI85**") || !strcmp(buf, "**TI86**") ||
!strcmp(buf, "**TI89**") || !strcmp(buf, "**TI92**") ||
!strcmp(buf, "**TI92P*") || !strcmp(buf, "**V200**") ||
!strcmp(buf, "**TIFL**")) {
fclose(f);
return !0;
}
if(!strncmp(buf, "*TI", 3))
{
fclose(f);
return !0;
}
fclose(f);
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;
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_flash:
* @filename: name of flash file to open.
* @content: where to store the file content.
*
* Load the flash file into a #FlashContent structure.
*
* Structure content must be freed with #tifiles_content_delete_flash 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_flash(const char *filename, Ti9xFlash *head)
{
FILE *f;
Ti9xFlash *content = head;
long cur_pos = 0;
int tib = 0;
char signature[9];
int ret = ERR_FILE_IO;
if (head == NULL)
{
tifiles_critical("%s: an argument is NULL", __FUNCTION__);
return ERR_INVALID_FILE;
}
if (!tifiles_file_is_flash(filename) && !tifiles_file_is_tib(filename))
{
ret = ERR_INVALID_FILE;
goto tfrf2;
}
// detect file type (old or new format)
tib = tifiles_file_is_tib(filename);
f = g_fopen(filename, "rb");
if (f == NULL)
{
tifiles_info("Unable to open this file: %s", filename);
ret = ERR_FILE_OPEN;
goto tfrf2;
}
if (fseek(f, 0, SEEK_END)) goto tfrf;
cur_pos = ftell(f);
if (cur_pos < 0) goto tfrf;
if (fseek(f, 0, SEEK_SET)) goto tfrf;
// The TI-68k series' members have at best 4 MB of Flash.
// TIB files larger than that size are insane.
if (cur_pos >= (4L << 20))
{
ret = ERR_INVALID_FILE;
goto tfrf;
}
if (tib)
{
// tib is an old format but mainly used by developers
memset(content, 0, sizeof(Ti9xFlash));
content->data_length = (uint32_t)cur_pos;
strncpy(content->name, "basecode", sizeof(content->name) - 1);
content->name[sizeof(content->name) - 1] = 0;
content->data_type = 0x23; // FLASH os
content->data_part = (uint8_t *)g_malloc0(content->data_length);
if (content->data_part == NULL)
{
ret = ERR_MALLOC;
goto tfrf;
}
if (fread(content->data_part, 1, content->data_length, f) < content->data_length) goto tfrf;
switch(content->data_part[8])
{
case 1: content->device_type = DEVICE_TYPE_92P; break; // TI92+
case 3: content->device_type = DEVICE_TYPE_89; break; // TI89
// value added by the TI community according to HWID parameter
// doesn't have any 'legal' existence.
case 8: content->device_type = DEVICE_TYPE_92P; break; // V200PLT
case 9: content->device_type = DEVICE_TYPE_89; break; // Titanium
}
content->next = NULL;
}
else
{
for (content = head;; content = content->next)
{
if (fread_8_chars(f, signature) < 0) goto tfrf;
content->model = tifiles_file_get_model(filename);
if (fread_byte(f, &(content->revision_major)) < 0) goto tfrf;
if (fread_byte(f, &(content->revision_minor)) < 0) goto tfrf;
if (fread_byte(f, &(content->flags)) < 0) goto tfrf;
if (fread_byte(f, &(content->object_type)) < 0) goto tfrf;
if (fread_byte(f, &(content->revision_day)) < 0) goto tfrf;
if (fread_byte(f, &(content->revision_month)) < 0) goto tfrf;
if (fread_word(f, &(content->revision_year)) < 0) goto tfrf;
if (fskip(f, 1) < 0) goto tfrf;
if (fread_8_chars(f, content->name) < 0) goto tfrf;
if (fskip(f, 23) < 0) goto tfrf;
if (fread_byte(f, &(content->device_type)) < 0) goto tfrf;
if (fread_byte(f, &(content->data_type)) < 0) goto tfrf;
if (fskip(f, 23) < 0) goto tfrf;
if (fread_byte(f, &(content->hw_id)) < 0) goto tfrf;
if (fread_long(f, &(content->data_length)) < 0) goto tfrf;
if (content->data_type != TI89_LICENSE && !check_device_type(content->device_type))
{
ret = ERR_INVALID_FILE;
goto tfrf;
}
if (!check_data_type(content->data_type))
{
ret = ERR_INVALID_FILE;
goto tfrf;
}
// TODO: modify this code if TI ever makes a TI-eZ80 model with more than 4 MB of Flash memory...
if (content->data_length > 4U * 1024 * 1024 - 65536U)
{
// Data length larger than Flash memory size - boot code sector size doesn't look right.
ret = ERR_INVALID_FILE;
goto tfrf;
}
content->data_part = (uint8_t *)g_malloc0(content->data_length);
if (content->data_part == NULL)
{
ret = ERR_MALLOC;
goto tfrf;
}
if (fread(content->data_part, 1, content->data_length, f) < content->data_length) goto tfrf;
if ( (content->data_type == TI83p_AMS && content->data_part[0] != 0x80)
|| (content->data_type == TI83p_APPL && content->data_part[0] != 0x81))
{
ret = ERR_INVALID_FILE;
goto tfrf;
}
content->next = NULL;
// check for end of file
if (fread_8_chars(f, signature) < 0)
{
break;
}
if (strcmp(signature, "**TIFL**") || feof(f))
{
break;
}
if (fseek(f, -8, SEEK_CUR)) goto tfrf;
content->next = (Ti9xFlash *)g_malloc0(sizeof(Ti9xFlash));
if (content->next == NULL)
{
ret = ERR_MALLOC;
goto tfrf;
}
}
}
fclose(f);
return 0;
tfrf: // release on exit
tifiles_critical("%s: error reading / understanding file %s", __FUNCTION__, filename);
fclose(f);
tfrf2:
tifiles_content_delete_flash(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;
}
/**
* 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_flash:
* @filename: name of flash file to open.
* @content: where to store the file content.
*
* Load the flash file into a #FlashContent structure.
*
* Structure content must be freed with #tifiles_content_delete_flash 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_flash(const char *filename, Ti9xFlash *head)
{
FILE *f;
Ti9xFlash *content = head;
int tib = 0;
char signature[9];
if (!tifiles_file_is_flash(filename) && !tifiles_file_is_tib(filename))
{
return ERR_INVALID_FILE;
}
if (head == NULL)
{
tifiles_critical("%s: an argument is NULL", __FUNCTION__);
return ERR_INVALID_FILE;
}
// detect file type (old or new format)
tib = tifiles_file_is_tib(filename);
f = g_fopen(filename, "rb");
if (f == NULL)
{
tifiles_info("Unable to open this file: %s\n", filename);
return ERR_FILE_OPEN;
}
if (tib)
{ // tib is an old format but mainly used by developers
memset(content, 0, sizeof(Ti9xFlash));
if(fseek(f, 0, SEEK_END)) goto tfrf;
content->data_length = (uint32_t) ftell(f);
if(fseek(f, 0, SEEK_SET)) goto tfrf;
strcpy(content->name, "basecode");
content->data_type = 0x23; // FLASH os
content->data_part = (uint8_t *)g_malloc0(content->data_length);
if (content->data_part == NULL)
{
fclose(f);
return ERR_MALLOC;
}
if(fread(content->data_part, 1, content->data_length, f) < content->data_length) goto tfrf;
switch(content->data_part[8])
{
case 1: content->device_type = DEVICE_TYPE_92P; break; // TI92+
case 3: content->device_type = DEVICE_TYPE_89; break; // TI89
// value added by the TI community according to HWID parameter
// doesn't have any 'legal' existence.
case 8: content->device_type = DEVICE_TYPE_92P; break; // V200PLT
case 9: content->device_type = DEVICE_TYPE_89; break; // Titanium
}
content->next = NULL;
}
else
{
for (content = head;; content = content->next)
{
if(fread_8_chars(f, signature) < 0) goto tfrf;
content->model = tifiles_file_get_model(filename);
if(fread_byte(f, &(content->revision_major)) < 0) goto tfrf;
if(fread_byte(f, &(content->revision_minor)) < 0) goto tfrf;
if(fread_byte(f, &(content->flags)) < 0) goto tfrf;
if(fread_byte(f, &(content->object_type)) < 0) goto tfrf;
if(fread_byte(f, &(content->revision_day)) < 0) goto tfrf;
if(fread_byte(f, &(content->revision_month)) < 0) goto tfrf;
if(fread_word(f, &(content->revision_year)) < 0) goto tfrf;
if(fskip(f, 1) < 0) goto tfrf;
if(fread_8_chars(f, content->name) < 0) goto tfrf;
if(fskip(f, 23) < 0) goto tfrf;
if(fread_byte(f, &(content->device_type)) < 0) goto tfrf;
if(fread_byte(f, &(content->data_type)) < 0) goto tfrf;
if(fskip(f, 23) < 0) goto tfrf;
if(fread_byte(f, &(content->hw_id)) < 0) goto tfrf;
if(fread_long(f, &(content->data_length)) < 0) goto tfrf;
if(content->data_type != TI89_LICENSE && !check_device_type(content->device_type))
{
return ERR_INVALID_FILE;
}
if(!check_data_type(content->data_type))
{
return ERR_INVALID_FILE;
}
content->data_part = (uint8_t *)g_malloc0(content->data_length);
if (content->data_part == NULL)
{
fclose(f);
tifiles_content_delete_flash(content);
return ERR_MALLOC;
}
if(fread(content->data_part, 1, content->data_length, f) < content->data_length) goto tfrf;
content->next = NULL;
// check for end of file
if(fread_8_chars(f, signature) < 0)
{
break;
}
if(strcmp(signature, "**TIFL**") || feof(f))
{
break;
}
if(fseek(f, -8, SEEK_CUR)) goto tfrf;
content->next = (Ti9xFlash *)g_malloc0(sizeof(Ti9xFlash));
if (content->next == NULL)
{
fclose(f);
tifiles_content_delete_flash(content);
return ERR_MALLOC;
}
}
}
fclose(f);
return 0;
tfrf: // release on exit
tifiles_critical("%s: error reading / understanding file %s", __FUNCTION__, filename);
fclose(f);
tifiles_content_delete_flash(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;
}