Rev 3260 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 3259 | decky | 1 | # |
| 2 | # Copyright (c) 2008 Martin Decky |
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| 3 | # All rights reserved. |
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| 4 | # |
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| 5 | # Redistribution and use in source and binary forms, with or without |
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| 6 | # modification, are permitted provided that the following conditions |
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| 7 | # are met: |
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| 8 | # |
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| 9 | # - Redistributions of source code must retain the above copyright |
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| 10 | # notice, this list of conditions and the following disclaimer. |
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| 11 | # - Redistributions in binary form must reproduce the above copyright |
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| 12 | # notice, this list of conditions and the following disclaimer in the |
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| 13 | # documentation and/or other materials provided with the distribution. |
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| 14 | # - The name of the author may not be used to endorse or promote products |
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| 15 | # derived from this software without specific prior written permission. |
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| 16 | # |
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| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | # |
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| 28 | """ |
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| 29 | Convert descriptive structure definitions to struct formats |
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| 30 | """ |
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| 31 | |||
| 32 | import struct |
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| 33 | |||
| 34 | def convert(definition): |
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| 35 | "Convert structure defition to struct format" |
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| 36 | |||
| 37 | tokens = definition.split(None) |
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| 38 | |||
| 39 | # Initial byte order tag |
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| 40 | struct = { |
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| 41 | "little:": lambda: "<", |
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| 42 | "big:": lambda: ">", |
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| 43 | "network:": lambda: "!" |
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| 44 | }[tokens[0]]() |
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| 45 | |||
| 46 | # Member tags |
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| 47 | |||
| 48 | for token in tokens[1:]: |
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| 49 | if (token[0:5] == "char["): |
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| 50 | size = token[5:].split("]")[0] |
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| 51 | struct += ("%d" % int(size)) + "s" |
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| 52 | else: |
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| 53 | struct += { |
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| 54 | "uint8_t": lambda: "B", |
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| 55 | "uint16_t": lambda: "H", |
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| 56 | "uint32_t": lambda: "L", |
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| 57 | "uint64_t": lambda: "Q", |
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| 58 | |||
| 59 | "int8_t": lambda: "b", |
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| 60 | "int16_t": lambda: "h", |
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| 61 | "int32_t": lambda: "l", |
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| 62 | "int64_t": lambda: "q" |
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| 63 | }[token]() |
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| 64 | |||
| 65 | return struct |
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| 66 | |||
| 67 | def little_string(string): |
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| 68 | return struct.pack("<" + ("%d" % len(string)) + "s", string) |