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/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static char quote = 0;
static int in_name = 0;
static size_t typedef_keyword = 0;
static size_t struct_keyword = 0;
static size_t union_keyword = 0;
static size_t enum_keyword = 0;
static int printing = 0;
static size_t levels = 0;
static size_t brackets = 0;
static size_t
extract(char *text, size_t len, int *outputln)
{
const char *keyword;
char *w = text, c;
size_t off;
*outputln = 0;
for (off = 0; off < len; off++) {
if (!text[off])
text[off] = ' ';
if (printing) {
*w++ = text[off];
levels += text[off] == '{';
levels -= text[off] == '}';
if (!levels && text[off] == ';') {
if ((size_t)(w - text) == len)
*outputln = 1;
else
*w++ = '\n';
printing = 0;
}
continue;
}
switch (text[off]) {
case '\"':
case '\'':
in_name = 0;
quote = quote == text[off] ? 0 : text[off];
break;
case '\\':
off++;
break;
default:
if (quote)
break;
brackets += text[off] == '(' || text[off] == '[' || text[off] == '{';
brackets -= text[off] == ')' || text[off] == ']' || text[off] == '}';
if (brackets)
break;
if (!"typedef"[typedef_keyword]) {
keyword = "typedef";
goto found_keyword;
} else if (!"struct"[struct_keyword]) {
keyword = "struct";
goto found_keyword;
} else if (!"union"[union_keyword]) {
keyword = "union";
goto found_keyword;
} else if (!"enum"[enum_keyword]) {
keyword = "enum";
goto found_keyword;
} else if (!in_name) {
if (text[off] != "typedef"[typedef_keyword++])
typedef_keyword = 0;
if (text[off] != "struct"[struct_keyword++])
struct_keyword = 0;
if (text[off] != "union"[union_keyword++])
union_keyword = 0;
if (text[off] != "enum"[enum_keyword++])
enum_keyword = 0;
if (typedef_keyword || struct_keyword || union_keyword || enum_keyword)
break;
}
if (isalnum(text[off]) || text[off] == '_')
in_name = 1;
else
goto not_alnum;
break;
found_keyword:
if (isalnum(text[off]) || text[off] == '_') {
in_name = 1;
goto reset_keyword;
}
c = text[off];
w = stpcpy(w, keyword);
*w++ = c;
printing = 1;
not_alnum:
in_name = 0;
reset_keyword:
typedef_keyword = 0;
struct_keyword = 0;
union_keyword = 0;
enum_keyword = 0;
break;
}
}
return (size_t)(w - text);
}
int
main(int argc, char *argv[])
{
char buf[8 << 10];
size_t size, off;
ssize_t r;
int outputln = 0;
(void) argc;
for (;;) {
r = read(STDIN_FILENO, buf, sizeof(buf));
if (r <= 0) {
if (!r)
break;
if (errno == EINTR)
continue;
perror(argv[0]);
return 1;
}
size = extract(buf, (size_t)r, &outputln);
write_again:
for (off = 0; off < size; off += (size_t)r) {
r = write(STDOUT_FILENO, &buf[off], size - off);
if (r <= 0) {
if (errno == EINTR)
continue;
perror(argv[0]);
return 1;
}
}
if (outputln) {
outputln = 0;
buf[0] = '\n';
size = 1;
goto write_again;
}
}
return 0;
}
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