github.com/cockroachdb/tools@v0.0.0-20230222021103-a6d27438930d/cmd/signature-fuzzer/internal/fuzz-generator/pointerparm.go (about)

     1  // Copyright 2021 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package generator
     6  
     7  import (
     8  	"bytes"
     9  	"fmt"
    10  )
    11  
    12  // pointerparm describes a parameter of pointer type; it implements the
    13  // "parm" interface.
    14  type pointerparm struct {
    15  	tag    string
    16  	totype parm
    17  	isBlank
    18  	addrTakenHow
    19  	isGenValFunc
    20  	skipCompare
    21  }
    22  
    23  func (p pointerparm) Declare(b *bytes.Buffer, prefix string, suffix string, caller bool) {
    24  	n := p.totype.TypeName()
    25  	if caller {
    26  		n = p.totype.QualName()
    27  	}
    28  	b.WriteString(fmt.Sprintf("%s *%s%s", prefix, n, suffix))
    29  }
    30  
    31  func (p pointerparm) GenElemRef(elidx int, path string) (string, parm) {
    32  	return path, &p
    33  }
    34  
    35  func (p pointerparm) GenValue(s *genstate, f *funcdef, value int, caller bool) (string, int) {
    36  	pref := ""
    37  	if caller {
    38  		pref = s.checkerPkg(s.pkidx) + "."
    39  	}
    40  	var valstr string
    41  	valstr, value = s.GenValue(f, p.totype, value, caller)
    42  	fname := s.genAllocFunc(p.totype)
    43  	return fmt.Sprintf("%s%s(%s)", pref, fname, valstr), value
    44  }
    45  
    46  func (p pointerparm) IsControl() bool {
    47  	return false
    48  }
    49  
    50  func (p pointerparm) NumElements() int {
    51  	return 1
    52  }
    53  
    54  func (p pointerparm) String() string {
    55  	return fmt.Sprintf("*%s", p.totype)
    56  }
    57  
    58  func (p pointerparm) TypeName() string {
    59  	return fmt.Sprintf("*%s", p.totype.TypeName())
    60  }
    61  
    62  func (p pointerparm) QualName() string {
    63  	return fmt.Sprintf("*%s", p.totype.QualName())
    64  }
    65  
    66  func mkPointerParm(to parm) pointerparm {
    67  	var pp pointerparm
    68  	pp.tag = "pointer"
    69  	pp.totype = to
    70  	return pp
    71  }
    72  
    73  func (p pointerparm) HasPointer() bool {
    74  	return true
    75  }