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#!/bin/bash
if (($# != 1)); then
>&2 echo "Usage: $0 <identifier>";
exit 1;
fi;
function grepc_helper()
{
find . -type f \
| grep "$1" \
| xargs grep -lP "$2" \
| sort \
| xargs pcregrep -Mn "$3" /dev/null \
| sed -E 's/^[^: ]+:[0-9]+:/\n\n&\n\n/';
}
function grepc_macro_simple()
{
grepc_helper '\.[ch]$' \
"define\s+$1\b[^(]" \
"(?s)define\s+$1\b[^(].*?[^\\\\]$";
}
function grepc_macro_func()
{
grepc_helper '\.[ch]$' \
"define\s+$1\(" \
"(?s)define\s+$1\(.*?[^\\\\]$";
}
function grepc_macro()
{
grepc_macro_simple "$1";
grepc_macro_func "$1";
}
function grepc_enum_constant()
{
grepc_helper '\.[ch]$' \
"\b$1\s*[,=]" \
"(?s)\benum\b\s*[\w\s[\]]*{[^}]*\b$1\s*[=,].*?^}.*?;";
}
function grepc_func_decl()
{
grepc_helper '\.[ch]$' \
"\b$1\s*\(" \
"(?s)^[\w[][\w\s(,)[:\]*]+\s+\**$1\s*\([\w\s(,)[\]*]+?(...)?\)[\w\s(,)[:\]]*;";
}
function grepc_func_def()
{
grepc_helper '\.[ch]$' \
"\b$1\s*\(" \
"(?s)^[\w[][\w\s(,)[:\]*]+\s+\**$1\s*\([\w\s(,)[\]*]+?(...)?\)\s*{.*?^}";
}
function grepc_func()
{
grepc_func_decl "$1";
grepc_func_def "$1";
}
function grepc_syscall_decl()
{
grepc_helper '\.[ch]$' \
"\bsys_$1\s*\(" \
"(?s)^asmlinkage\s+[\w\s]+\**sys_$1\s*\(.*?\)";
}
function grepc_syscall_def()
{
grepc_helper '\.c$' \
"SYSCALL_DEFINE.\($1\b" \
"(?s)^\w*SYSCALL_DEFINE.\($1\b.*?^}";
}
function grepc_syscall()
{
grepc_syscall_decl "$1";
grepc_syscall_def "$1";
}
function grepc_type_struct_union_enum()
{
grepc_helper '\.[ch]$' \
"\b(struct|union|enum)\s+$1\b" \
"(?s)^([\w[][\w\s(,)[:\]*]+\s+)?\b(struct|union|enum)\s+$1\b\s*[\w\s[\]]*{.*?^}.*?;";
}
function grepc_type_typedef_simple()
{
grepc_helper '\.[ch]$' \
"\b$1;" \
"(?s)^typedef\s+[^;]+$1;";
}
function grepc_type_typedef_struct_union_enum()
{
grepc_helper '\.[ch]$' \
"^}\s*$1;" \
"(?s)^typedef\s(?:(?!^}).)*^}\s*$1;";
}
function grepc_type_typedef_underlying_struct_union_enum()
{
find . -type f \
| grep '\.[ch]$' \
| xargs grep -hP "^typedef\s+.*\b$1;" \
| sed -E -e 's/^typedef\s+//' -e "s/\s*\**\b$1;.*//" \
| sed -E -e 's/^struct\s+//' -e 's/^union\s+//' -e 's/^enum\s+//' \
| while read t; do
test "$1" != "$t" \
&& grepc_type_struct_union_enum "$t";
done;
}
function grepc_type_typedef()
{
grepc_type_typedef_simple "$1";
grepc_type_typedef_struct_union_enum "$1";
grepc_type_typedef_underlying_struct_union_enum "$1";
}
function grepc_type()
{
grepc_type_struct_union_enum "$1";
grepc_type_typedef "$1";
}
function main()
{
grepc_macro "$1";
grepc_enum_constant "$1";
grepc_func "$1";
grepc_syscall "$1";
grepc_type "$1";
}
main "$1";
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