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annotate go/godc/README.txt @ 44:0f86a5ecfe61

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- python: allow None to be passed for 'p'ointers, always passing NULL
author Tassilo Philipp
date Tue, 27 Oct 2020 18:44:18 +0100
parents 1e3d929e43be
children
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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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5
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6 BUILD/INSTALLATION
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7 ==================
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9 1) make sure dyncall is built and libraries/headers are in include paths or
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11 CGO_CFLAGS points to them, etc.
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13 2) Build this nut with:
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15 go build
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18 API
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19 ===
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21 Since go is low level, dyncall's public functions are pretty much exposed
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22 function by function. Referg to dyncall(3) and godc.go.
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23
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24 l := new(ExtLib)
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25 err := l.Load(libpath)
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26 defer l.Free()
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27 err := l.SymsInit(libpath)
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28 defer l.SymsCleanup()
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29
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30 l.lib // Address lib is loaded at
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31 l.FindSymbol(symbolname)
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32 l.SymsCount()
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33 l.SymsNameFromValue(l.FindSymbol(synbolname))
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34 l.SymsName(index)
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35
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36 vm := new(CallVM)
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37 err := vm.InitCallVM()
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38 defer vm.Free()
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39 vm.Mode(DC_CALL_C_DEFAULT)
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40 vm.Reset()
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41 vm.ArgFloat(36)
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42 rf := vm.CallFloat(l.FindSymbol("sqrtf"))
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44 vm.Arg....
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46
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47 SIGNATURE FORMAT
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48 ================
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49
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50 Signature string is only used by ArgF function, rest uses type info from Go.
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51
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52 TYPE CONVERSIONS (and reserved signature char)
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53
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54 SIG | FROM GO | C/C++ | TO GO
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55 ----+---------------------+--------------------+----------------
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56 'v' | | void |
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57 'B' | bool | bool | bool
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58 'c' | int8,C.schar | char | int8
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59 'C' | uint8,byte,C.uchar | unsigned char | uint8,byte
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60 's' | int16,C.sshort | short | int16
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61 'S' | uint16,C.ushort | unsigned short | uint16
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62 'i' | int32,C.sint | int | int32
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63 'I' | uint32,C.uint | unsigned int | uint32
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64 'j' | int32,rune,C.slong | long | int32,rune
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65 'J' | uint32,C.ulong | unsigned long | uint32
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66 'l' | int64,C.slonglong | long long | int64
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67 'L' | uint64,C.ulonglong | unsigned long long | uint64
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68 'f' | float32,C.float | float | float32
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69 'd' | float64,C.double | double | float64
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70 'p' | *,[],unsafe.Pointer | void* | unsafe.Pointer
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71 'Z' | string | void* | string
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72
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73
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74 TODO
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75 ====
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76
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77 - structs
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78 - callbacks
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79 - callf wrap (argf already there)
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80 - signature chars used to indicate calling conventions are not supported yet!
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81 - update cconv modes, so they are up to date
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