/trunk/tools/xstruct.py |
---|
26,26 → 26,39 |
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
# |
""" |
Convert descriptive structure definitions to struct formats |
Convert descriptive structure definitions to structure object |
""" |
import struct |
def convert(definition): |
"Convert structure defition to struct format" |
class Struct: |
def size(self): |
return struct.calcsize(self._format_) |
def pack(self): |
list = [] |
for variable in self._list_: |
list.append(self.__dict__[variable]) |
return struct.pack(self._format_, *list) |
def create(definition): |
"Create structure object" |
tokens = definition.split(None) |
# Initial byte order tag |
struct = { |
format = { |
"little:": lambda: "<", |
"big:": lambda: ">", |
"network:": lambda: "!" |
}[tokens[0]]() |
inst = Struct() |
list = [] |
# Member tags |
comment = False |
variable = False |
for token in tokens[1:]: |
if (comment): |
if (token == "*/"): |
52,13 → 65,23 |
comment = False |
continue |
if (variable): |
inst.__dict__[token] = None |
list.append(token) |
variable = False |
continue |
if (token == "/*"): |
comment = True |
elif (token[0:8] == "padding["): |
size = token[8:].split("]")[0] |
format += "%dx" % int(size) |
elif (token[0:5] == "char["): |
size = token[5:].split("]")[0] |
struct += ("%d" % int(size)) + "s" |
format += "%ds" % int(size) |
variable = True |
else: |
struct += { |
format += { |
"uint8_t": lambda: "B", |
"uint16_t": lambda: "H", |
"uint32_t": lambda: "L", |
69,11 → 92,8 |
"int32_t": lambda: "l", |
"int64_t": lambda: "q" |
}[token]() |
variable = True |
return struct |
def little_string(string): |
return struct.pack("<" + ("%d" % len(string)) + "s", string) |
def little_padding(length): |
return struct.pack("<" + ("%d" % length) + "x") |
inst.__dict__['_format_'] = format |
inst.__dict__['_list_'] = list |
return inst |
/trunk/tools/mktmpfs.py |
---|
32,26 → 32,34 |
import sys |
import os |
import struct |
import xstruct |
HEADER = xstruct.convert("little: " |
"char[5] /* 'TMPFS' */ " |
) |
HEADER = """little: |
char[5] tag /* 'TMPFS' */ |
""" |
DENTRY = xstruct.convert("little: " |
"uint8_t /* NONE, FILE or DIRECTORY */ " |
"uint32_t /* filename length */ " |
) |
DENTRY_NONE = """little: |
uint8_t kind /* NONE */ |
uint32_t fname_len /* 0 */ |
""" |
SIZE = xstruct.convert("little: " |
"uint32_t /* file size */ " |
) |
DENTRY_FILE = """little: |
uint8_t kind /* FILE */ |
uint32_t fname_len /* filename length */ |
char[%d] fname /* filename */ |
uint32_t flen /* file length */ |
""" |
DENTRY_NONE = 0 |
DENTRY_FILE = 1 |
DENTRY_DIRECTORY = 2 |
DENTRY_DIRECTORY = """little: |
uint8_t kind /* DIRECTORY */ |
uint32_t fname_len /* filename length */ |
char[%d] fname /* filename */ |
""" |
TMPFS_NONE = 0 |
TMPFS_FILE = 1 |
TMPFS_DIRECTORY = 2 |
def usage(prname): |
"Print usage syntax" |
print prname + " <PATH> <IMAGE>" |
63,13 → 71,18 |
canon = os.path.join(root, name) |
if (os.path.isfile(canon)): |
outf.write(struct.pack(DENTRY, DENTRY_FILE, len(name))) |
outf.write(xstruct.little_string(name)) |
size = os.path.getsize(canon) |
rd = 0; |
outf.write(struct.pack(SIZE, size)) |
dentry = xstruct.create(DENTRY_FILE % len(name)) |
dentry.kind = TMPFS_FILE |
dentry.fname_len = len(name) |
dentry.fname = name |
dentry.flen = size |
outf.write(dentry.pack()) |
inf = file(canon, "r") |
rd = 0; |
while (rd < size): |
data = inf.read(4096); |
outf.write(data) |
77,10 → 90,20 |
inf.close() |
if (os.path.isdir(canon)): |
outf.write(struct.pack(DENTRY, DENTRY_DIRECTORY, len(name))) |
outf.write(xstruct.little_string(name)) |
dentry = xstruct.create(DENTRY_DIRECTORY % len(name)) |
dentry.kind = TMPFS_DIRECTORY |
dentry.fname_len = len(name) |
dentry.fname = name |
outf.write(dentry.pack()) |
recursion(canon, outf) |
outf.write(struct.pack(DENTRY, DENTRY_NONE, 0)) |
dentry = xstruct.create(DENTRY_NONE) |
dentry.kind = TMPFS_NONE |
dentry.fname_len = 0 |
outf.write(dentry.pack()) |
def main(): |
if (len(sys.argv) < 3): |
94,11 → 117,20 |
outf = file(sys.argv[2], "w") |
outf.write(struct.pack(HEADER, "TMPFS")) |
header = xstruct.create(HEADER) |
header.tag = "TMPFS" |
outf.write(header.pack()) |
recursion(path, outf) |
outf.write(struct.pack(DENTRY, DENTRY_NONE, 0)) |
dentry = xstruct.create(DENTRY_NONE) |
dentry.kind = TMPFS_NONE |
dentry.fname_len = 0 |
outf.write(dentry.pack()) |
outf.close() |
if __name__ == '__main__': |
main() |
/trunk/tools/mkhord.py |
---|
32,18 → 32,16 |
import sys |
import os |
import struct |
import xstruct |
HEADER = xstruct.convert("little: " |
"char[4] /* 'HORD' */ " |
"uint8_t /* version */ " |
"uint8_t /* encoding */ " |
"uint32_t /* header size */ " |
"uint64_t /* payload size */ " |
) |
HEADER = """little: |
char[4] tag /* 'HORD' */ |
uint8_t version /* version */ |
uint8_t encoding /* encoding */ |
uint32_t header_size /* header size */ |
uint64_t payload_size /* payload size */ |
""" |
HORD_VERSION = 1 |
HORD_LSB = 1 |
def align_up(size, alignment): |
76,20 → 74,28 |
inf = file(fs_image, "rb") |
outf = file(sys.argv[3], "wb") |
header_size = struct.calcsize(HEADER) |
header = xstruct.create(HEADER) |
header_size = header.size() |
payload_size = os.path.getsize(fs_image) |
header_size_aligned = align_up(header_size, align) |
payload_size_aligned = align_up(payload_size, align) |
outf.write(struct.pack(HEADER, "HORD", HORD_VERSION, HORD_LSB, header_size_aligned, payload_size_aligned)) |
outf.write(xstruct.little_padding(header_size_aligned - header_size)) |
header.tag = "HORD" |
header.version = 1 |
header.encoding = HORD_LSB |
header.header_size = header_size_aligned |
header.payload_size = payload_size_aligned |
outf.write(header.pack()) |
outf.write(xstruct.create("little: padding[%d]" % (header_size_aligned - header_size)).pack()) |
outf.write(inf.read()) |
padding = payload_size_aligned - payload_size |
if (padding > 0): |
outf.write(xstruct.little_padding(padding)) |
outf.write(xstruct.create("little: padding[%d]" % padding).pack()) |
inf.close() |
outf.close() |