fn write_headers()

in src/bindgen/language_backend/clike.rs [342:446]
99 lines of code
20 McCabe index (conditional complexity)

    fn write_headers<W: Write>(&self, out: &mut SourceWriter<W>, package_version: &str) {
        if self.config.package_version {
            write!(out, "/* Package version: {} */", package_version);
            out.new_line();
        }
        if let Some(ref f) = self.config.header {
            out.new_line_if_not_start();
            write!(out, "{}", f);
            out.new_line();
        }
        if let Some(f) = self.config.include_guard() {
            out.new_line_if_not_start();
            write!(out, "#ifndef {}", f);
            out.new_line();
            write!(out, "#define {}", f);
            out.new_line();
        }
        if self.config.pragma_once {
            out.new_line_if_not_start();
            write!(out, "#pragma once");
            out.new_line();
        }
        if self.config.include_version {
            out.new_line_if_not_start();
            write!(
                out,
                "/* Generated with cbindgen:{} */",
                crate::bindgen::config::VERSION
            );
            out.new_line();
        }
        if let Some(ref f) = self.config.autogen_warning {
            out.new_line_if_not_start();
            write!(out, "{}", f);
            out.new_line();
        }

        if self.config.no_includes
            && self.config.sys_includes().is_empty()
            && self.config.includes().is_empty()
            && self.config.after_includes.is_none()
        {
            return;
        }

        out.new_line_if_not_start();

        if !self.config.no_includes {
            match self.config.language {
                Language::C => {
                    out.write("#include <stdarg.h>");
                    out.new_line();
                    out.write("#include <stdbool.h>");
                    out.new_line();
                    if self.config.usize_is_size_t {
                        out.write("#include <stddef.h>");
                        out.new_line();
                    }
                    out.write("#include <stdint.h>");
                    out.new_line();
                    out.write("#include <stdlib.h>");
                    out.new_line();
                }
                Language::Cxx => {
                    out.write("#include <cstdarg>");
                    out.new_line();
                    if self.config.usize_is_size_t {
                        out.write("#include <cstddef>");
                        out.new_line();
                    }
                    out.write("#include <cstdint>");
                    out.new_line();
                    out.write("#include <cstdlib>");
                    out.new_line();
                    out.write("#include <ostream>");
                    out.new_line();
                    out.write("#include <new>");
                    out.new_line();
                    if self.config.enumeration.cast_assert_name.is_none()
                        && (self.config.enumeration.derive_mut_casts
                            || self.config.enumeration.derive_const_casts)
                    {
                        out.write("#include <cassert>");
                        out.new_line();
                    }
                }
                _ => {}
            }
        }

        for include in self.config.sys_includes() {
            write!(out, "#include <{}>", include);
            out.new_line();
        }

        for include in self.config.includes() {
            write!(out, "#include \"{}\"", include);
            out.new_line();
        }

        if let Some(ref line) = self.config.after_includes {
            write!(out, "{}", line);
            out.new_line();
        }
    }