103 lines
2.7 KiB
Python
103 lines
2.7 KiB
Python
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#!/usr/bin/env python3
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lib = "libduktape.207.20700.so"
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from ctypes import CDLL, byref, string_at, c_int, c_void_p, c_char_p, c_size_t
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duk = CDLL(lib)
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def str_to_c(s):
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b = s.encode("utf8")
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return [c_char_p(b), len(b)]
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def duk_create_heap_default():
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duk.duk_create_heap.restype = c_void_p
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return duk.duk_create_heap(None, None, None, None, None)
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def duk_eval_string_noresult(ctx, cmd):
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[s, l] = str_to_c(cmd)
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return duk.duk_eval_raw(ctx, s, l, 1 | (1<<3) | (1<<9) | (1<<10) | (1<<8) | (1<<11) )
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def duk_eval_string(ctx, cmd):
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[s, l] = str_to_c(cmd)
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return duk.duk_eval_raw(ctx, s, l, 0 | (1<<3) | (1<<9) | (1<<10) | (1<<11) )
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def duk_peval(ctx):
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return duk.duk_eval_raw(ctx, None, 0, 1 | (1<<3) | (1<<7) | (1<<11) )
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def duk_get_string(ctx, idx):
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duk.duk_get_string.restype = c_char_p
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retval = duk.duk_get_string(ctx, idx)
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return retval.decode("utf8")
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def eval_file(ctx, path):
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with open(path, "r") as f:
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code = f.read()
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[s, l] = str_to_c(code)
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duk.duk_push_lstring(ctx, s, l)
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retval = duk_peval(ctx)
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duk.duk_pop(ctx)
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return retval
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def load_file(ctx, path, var):
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with open(path, "rb") as f:
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data = f.read()
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ptr = c_char_p(data)
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duk.duk_push_buffer_raw(ctx, 0, 1 | 2)
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duk.duk_config_buffer(ctx, -1, ptr, len(data))
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duk.duk_put_global_string(ctx, str_to_c(var)[0])
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return data
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def save_file(ctx, path, var):
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duk.duk_get_global_string(ctx, str_to_c(var)[0])
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sz = c_size_t()
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duk.duk_get_buffer_data.restype = c_void_p
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buf = duk.duk_get_buffer_data(ctx, -1, byref(sz))
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s = string_at(buf, sz.value)
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with open(path, "wb") as f:
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f.write(s)
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def process(path):
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# initialize
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context = duk_create_heap_default()
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ctx = c_void_p(context)
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def DOIT(cmd):
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return duk_eval_string_noresult(ctx, cmd)
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# duktape does not expose a standard "global" by default
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DOIT("var global = (function(){ return this; }).call(null);")
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# load library
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eval_file(ctx, "shim.min.js")
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eval_file(ctx, "xlsx.full.min.js")
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# get version string
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duk_eval_string(ctx, "XLSX.version")
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print("SheetJS Library Version %s" % (duk_get_string(ctx, -1)))
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duk.duk_pop(ctx)
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# read file
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# NOTE: data is captured here to avoid GC
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data = load_file(ctx, path, "buf")
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print("Loaded file %s" % (path))
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# parse workbook
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DOIT("wb = XLSX.read(buf.slice(0, buf.length));")
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DOIT("ws = wb.Sheets[wb.SheetNames[0]]")
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# print CSV
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duk_eval_string(ctx, "XLSX.utils.sheet_to_csv(ws)")
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print(duk_get_string(ctx, -1))
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duk.duk_pop(ctx)
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DOIT("newbuf = (XLSX.write(wb, {type:'buffer', bookType:'xlsb'}));")
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save_file(ctx, "sheetjsw.xlsb", "newbuf")
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duk.duk_destroy_heap(ctx)
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return 0
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if("__main__" == __name__):
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from sys import argv
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process(argv[1])
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