github.com/wasilibs/wazerox@v0.0.0-20240124024944-4923be63ab5f/internal/wasm/counts.go (about)

     1  package wasm
     2  
     3  import "fmt"
     4  
     5  // SectionElementCount returns the count of elements in a given section ID
     6  //
     7  // For example...
     8  // * SectionIDType returns the count of FunctionType
     9  // * SectionIDCustom returns the count of CustomSections plus one if NameSection is present
    10  // * SectionIDHostFunction returns the count of HostFunctionSection
    11  // * SectionIDExport returns the count of unique export names
    12  func (m *Module) SectionElementCount(sectionID SectionID) uint32 { // element as in vector elements!
    13  	switch sectionID {
    14  	case SectionIDCustom:
    15  		numCustomSections := uint32(len(m.CustomSections))
    16  		if m.NameSection != nil {
    17  			numCustomSections++
    18  		}
    19  		return numCustomSections
    20  	case SectionIDType:
    21  		return uint32(len(m.TypeSection))
    22  	case SectionIDImport:
    23  		return uint32(len(m.ImportSection))
    24  	case SectionIDFunction:
    25  		return uint32(len(m.FunctionSection))
    26  	case SectionIDTable:
    27  		return uint32(len(m.TableSection))
    28  	case SectionIDMemory:
    29  		if m.MemorySection != nil {
    30  			return 1
    31  		}
    32  		return 0
    33  	case SectionIDGlobal:
    34  		return uint32(len(m.GlobalSection))
    35  	case SectionIDExport:
    36  		return uint32(len(m.ExportSection))
    37  	case SectionIDStart:
    38  		if m.StartSection != nil {
    39  			return 1
    40  		}
    41  		return 0
    42  	case SectionIDElement:
    43  		return uint32(len(m.ElementSection))
    44  	case SectionIDCode:
    45  		return uint32(len(m.CodeSection))
    46  	case SectionIDData:
    47  		return uint32(len(m.DataSection))
    48  	default:
    49  		panic(fmt.Errorf("BUG: unknown section: %d", sectionID))
    50  	}
    51  }