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# produce a header file for a parsed struct file
function header_elstring(elnum,
LOCAL, elem)
{
array_len = elements[elnum, "array_len"];
elem=elements[elnum, "elem"];
if (elements[elnum, "ptr"]=="1") elem="*"elem;
if (array_len!="") {
if (is_constant(array_len) == 1) {
elem=elem"["array_len"]";
} else {
elem="*"elem;
}
}
return elem;
}
function header_element(f, elnum,
LOCAL, type)
{
type=elements[elnum, "type"];
if (substr(type,1,1) == ".") return;
xprintf(f,"\t%s %s;\n", type, header_elstring(elnum));
}
function header_union(f, elnum,
LOCAL, i)
{
xprintf(f,"\tunion {\n");
for (i=0;i<unions[elnum, "num_elems"];i++) {
header_element(f, unions[elnum, i]);
}
xprintf(f,"\t} %s;\n", header_elstring(elnum));
}
function header_elem(f, elnum)
{
if (elements[elnum, "type"] == "union") {
header_union(f, elnum);
} else {
header_element(f, elnum);
}
}
function header_struct(f, struct_num,
LOCAL, i)
{
xprintf(f,"/* structure %s */\n",
structs[struct_num, "name"]);
xprintf(f,"typedef struct {\n");
for (i=0;i < structs[struct_num, "num_elems"];i++) {
header_elem(f, structs[struct_num, i]);
}
xprintf(f,"} %s;\n\n\n", structs[struct_num, "name"]);
}
function produce_headers(f, NIL,
LOCAL, i)
{
xprintf(f,"/* auto-generated headers for %s */\n\n\n", module);
xprintf(f,"#ifndef _%s_\n", module);
xprintf(f,"#define _%s_\n", module);
xprintf(f,"\n\n");
for (i=0;i < num_options;i++) {
xprintf(f,"#define OPTION_%s %s\n",
options[i, "name"], options[i, "value"]);
}
xprintf(f,"\n\n");
for (i=0;i < num_structs;i++) {
header_struct(f, i);
}
xprintf(f,"/* end auto-generated headers */\n\n");
xprintf(f,"#endif /* _%s_ */\n", module);
}
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