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resolve.go
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resolve.go
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package types
import (
"fmt"
"regexp"
"strings"
"github.com/elliotchance/c2go/program"
)
// TODO: Some of these are based on assumptions that may not be true for all
// architectures (like the size of an int). At some point in the future we will
// need to find out the sizes of some of there and pick the most compatible
// type.
//
// Please keep them sorted by name.
var simpleResolveTypes = map[string]string{
"bool": "bool",
"char *": "string",
"char": "byte",
"char*": "string",
"double": "float64",
"float": "float32",
"int": "int",
"long double": "float64",
"long int": "int32",
"long long": "int64",
"long unsigned int": "uint32",
"long": "int32",
"short": "int16",
"signed char": "int8",
"unsigned char": "uint8",
"unsigned int": "uint32",
"unsigned long long": "uint64",
"unsigned long": "uint32",
"unsigned short": "uint16",
"unsigned short int": "uint16",
"void *": "interface{}",
"void": "",
"_Bool": "bool",
"const char *": "string",
// Are these built into some compilers?
"uint32": "uint32",
"uint64": "uint64",
"__uint16_t": "uint16",
"__uint32_t": "uint32",
"__uint64_t": "uint64",
// Darwin specific
"__darwin_ct_rune_t": "github.com/elliotchance/c2go/darwin.Darwin_ct_rune_t",
"union __mbstate_t": "__mbstate_t",
"fpos_t": "int",
"struct __float2": "github.com/elliotchance/c2go/darwin.Float2",
"struct __double2": "github.com/elliotchance/c2go/darwin.Double2",
"Float2": "github.com/elliotchance/c2go/darwin.Float2",
"Double2": "github.com/elliotchance/c2go/darwin.Double2",
// These are special cases that almost certainly don't work. I've put
// them here because for whatever reason there is no suitable type or we
// don't need these platform specific things to be implemented yet.
"__builtin_va_list": "int64",
"__darwin_pthread_handler_rec": "int64",
"unsigned __int128": "uint64",
"__int128": "int64",
"__mbstate_t": "int64",
"__sbuf": "int64",
"__sFILEX": "interface{}",
"__va_list_tag": "interface{}",
"FILE": "int64",
"union sigval": "int",
"union __sigaction_u": "int",
// Linux specific
"union __WAIT_STATUS": "interface{}",
"union pthread_mutex_t": "interface{}",
"union pthread_mutexattr_t": "interface{}",
"union pthread_cond_t": "interface{}",
"union pthread_condattr_t": "interface{}",
"union pthread_rwlock_t": "interface{}",
"union pthread_rwlockattr_t": "interface{}",
"union pthread_barrier_t": "interface{}",
"union pthread_barrierattr_t": "interface{}",
"union pthread_attr_t": "interface{}",
}
func ResolveType(program *program.Program, s string) string {
// Remove any whitespace or attributes that are not relevant to Go.
s = strings.Replace(s, "const ", "", -1)
s = strings.Replace(s, "volatile ", "", -1)
s = strings.Replace(s, "*__restrict", "*", -1)
s = strings.Replace(s, "*restrict", "*", -1)
s = strings.Trim(s, " \t\n\r")
// FIXME: This is a hack to avoid casting in some situations.
if s == "" {
return s
}
if s == "char *[]" {
return "interface{}"
}
if s == "fpos_t" {
return "int"
}
// The simple resolve types are the types that we know there is an exact Go
// equivalent. For example float, int, etc.
for k, v := range simpleResolveTypes {
if k == s {
return program.ImportType(v)
}
}
// If the type is already defined we can proceed with the same name.
for _, v := range program.TypesAlreadyDefined {
if v == s {
return program.ImportType(s)
}
}
// Structures are by name.
if strings.HasPrefix(s, "struct ") {
if s[len(s)-1] == '*' {
s = s[7 : len(s)-2]
for _, v := range simpleResolveTypes {
if v == s {
return "*" + program.ImportType(simpleResolveTypes[s])
}
}
return "*" + s
} else {
s = s[7:]
for _, v := range simpleResolveTypes {
if v == s {
return program.ImportType(simpleResolveTypes[s])
}
}
return s
}
}
// Enums are by name.
if strings.HasPrefix(s, "enum ") {
if s[len(s)-1] == '*' {
return "*" + s[5:len(s)-2]
} else {
return s[5:]
}
}
// I have no idea how to handle this yet.
if strings.Index(s, "anonymous union") != -1 {
return "interface{}"
}
// It may be a pointer of a simple type. For example, float *, int *,
// etc.
if regexp.MustCompile("[\\w ]+\\*+$").MatchString(s) {
return "*" + ResolveType(program, strings.TrimSpace(s[:len(s)-2]))
}
if regexp.MustCompile(`[\w ]+\*\[\d+\]$`).MatchString(s) {
return "[]string"
}
// Function pointers are not yet supported. In the mean time they will be
// replaced with a type that certainly wont work until we can fix this
// properly.
search := regexp.MustCompile("[\\w ]+\\(\\*.*?\\)\\(.*\\)").MatchString(s)
if search {
return "interface{}"
}
search = regexp.MustCompile("[\\w ]+ \\(.*\\)").MatchString(s)
if search {
return "interface{}"
}
// It could be an array of fixed length.
search2 := regexp.MustCompile("([\\w ]+)\\[(\\d+)\\]").FindStringSubmatch(s)
if len(search2) > 0 {
return fmt.Sprintf("[%s]%s", search2[2], ResolveType(program, search2[1]))
}
panic(fmt.Sprintf("I couldn't find an appropriate Go type for the C type '%s'.", s))
}