Mercurial > pub > dyncall > bindings

annotate go/godc/README.txt @ 16:a40084782546

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- added support for more return values to python binding - python binding readme update
author cslag
date Sat, 26 Mar 2016 22:31:42 +0100
parents 8a45a05ff64e
children 739c40f35a6a
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1 dyncall go bindings
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2 Copyright 2014-2016 Tassilo Philipp
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3 February 23, 2014
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6 BUILD/INSTALLATION
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7 ------------------
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8
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9 1) make sure dyncall is built and libraries/headers are in include paths or
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10 CGO_CFLAGS points to them, etc.
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11
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12 2) Build this nut with:
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13 go build
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15
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16 API
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17 ---
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18
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19 Since go is low level, dyncall's public functions are pretty much exposed
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20 function by function. Referg to dyncall(3) and godc.go.
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21
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22 l := new(ExtLib)
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23 err := l.Load(libpath)
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24 defer l.Free()
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25 err := l.SymsInit(libpath)
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26 defer l.SymsCleanup()
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27
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28 l.lib // Address lib is loaded at
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29 l.FindSymbol(symbolname)
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30 l.SymsCount()
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31 l.SymsNameFromValue(l.FindSymbol(synbolname))
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32 l.SymsName(index)
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33
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34 vm := new(CallVM)
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35 err := vm.InitCallVM()
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36 defer vm.Free()
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37 vm.Mode(DC_CALL_C_DEFAULT)
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38 vm.Reset()
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39 vm.ArgFloat(36)
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40 rf := vm.CallFloat(l.FindSymbol("sqrtf"))
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41
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42 vm.Arg....
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43
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44
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45 SIGNATURE FORMAT
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46 ----------------
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47
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48 Signature string is only used by ArgF function, rest uses type info from Go.
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49
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50 TYPE CONVERSIONS (and reserved signature char)
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51
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52 SIG | FROM GO | C/C++ | TO GO
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53 ----+---------------------+--------------------+----------------
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54 'v' | | void |
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55 'B' | bool | bool | bool
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56 'c' | int8,C.schar | char | int8
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57 'C' | uint8,byte,C.uchar | unsigned char | uint8,byte
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58 's' | int16,C.sshort | short | int16
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59 'S' | uint16,C.ushort | unsigned short | uint16
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60 'i' | int32,C.sint | int | int32
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61 'I' | uint32,C.uint | unsigned int | uint32
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62 'j' | int32,rune,C.slong | long | int32,rune
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63 'J' | uint32,C.ulong | unsigned long | uint32
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64 'l' | int64,C.slonglong | long long | int64
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65 'L' | uint64,C.ulonglong | unsigned long long | uint64
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66 'f' | float32,C.float | float | float32
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67 'd' | float64,C.double | double | float64
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68 'p' | *,[],unsafe.Pointer | void* | unsafe.Pointer
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69 'Z' | string | void* | string
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70
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71
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72 ToDo:
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73 - structs
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74 - callbacks
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75 - callf wrap (argf already there)
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76