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// SPDX-License-Identifier: MIT
/*
* Copyright © 2023 Intel Corporation
*/
#define _GNU_SOURCE
#include <ctype.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#define HEADER \
"// SPDX-License-Identifier: MIT\n" \
"\n" \
"/*\n" \
" * DO NOT MODIFY.\n" \
" *\n" \
" * This file was generated from rules: %s\n" \
" */\n" \
"#ifndef _GENERATED_%s_\n" \
"#define _GENERATED_%s_\n" \
"\n" \
"enum {\n"
#define FOOTER \
"};\n" \
"\n" \
"#endif\n"
static void print_usage(FILE *f, const char *progname)
{
fprintf(f, "usage: %s <input-rule-file> <generated-c-source-file> <generated-c-header-file>\n",
progname);
}
static void print_parse_error(const char *err_msg, const char *line,
unsigned int lineno)
{
fprintf(stderr, "ERROR: %s\nERROR: %u: %.60s\n",
err_msg, lineno, line);
}
static char *strip(char *line, size_t linelen)
{
while (isspace(*(line + linelen)))
linelen--;
line[linelen - 1] = '\0';
return line + strspn(line, " \f\n\r\t\v");
}
#define MAX_LINE_LEN 4096
static int parse(FILE *input, FILE *csource, FILE *cheader, char *prefix)
{
char line[MAX_LINE_LEN + 1];
char *name, *prev_name = NULL, *rules;
unsigned int lineno = 0, idx = 0;
while (fgets(line, sizeof(line), input)) {
size_t linelen;
bool is_continuation;
if (line[0] == '\0' || line[0] == '#' || line[0] == '\n') {
lineno++;
continue;
}
linelen = strlen(line);
if (linelen == MAX_LINE_LEN) {
print_parse_error("line too long", line, lineno);
return -EINVAL;
}
is_continuation = isspace(line[0]);
name = strip(line, linelen);
if (!is_continuation) {
name = strtok(name, " \t");
rules = strtok(NULL, "");
} else {
if (!prev_name) {
print_parse_error("invalid rule continuation",
line, lineno);
return -EINVAL;
}
rules = name;
name = NULL;
}
if (rules[0] == '\0') {
print_parse_error("invalid empty rule\n", line, lineno);
return -EINVAL;
}
if (name) {
fprintf(cheader, "\t%s_%s = %u,\n", prefix, name, idx);
/* Close previous entry before starting a new one */
if (idx)
fprintf(csource, ") },\n");
fprintf(csource, "{ XE_RTP_NAME(\"%s\"),\n XE_RTP_RULES(%s",
name, rules);
idx++;
} else {
fprintf(csource, ", OR,\n\t%s", rules);
}
lineno++;
if (!is_continuation)
prev_name = name;
}
/* Close last entry */
if (idx)
fprintf(csource, ") },\n");
fprintf(cheader, "\t_%s_COUNT = %u\n", prefix, idx);
return 0;
}
/* Avoid GNU vs POSIX basename() discrepancy, just use our own */
static const char *xbasename(const char *s)
{
const char *p = strrchr(s, '/');
return p ? p + 1 : s;
}
static int fn_to_prefix(const char *fn, char *prefix, size_t size)
{
size_t len;
fn = xbasename(fn);
len = strlen(fn);
if (len > size - 1)
return -ENAMETOOLONG;
memcpy(prefix, fn, len + 1);
for (char *p = prefix; *p; p++) {
switch (*p) {
case '.':
*p = '\0';
return 0;
default:
*p = toupper(*p);
break;
}
}
return 0;
}
int main(int argc, const char *argv[])
{
enum {
ARGS_INPUT,
ARGS_CSOURCE,
ARGS_CHEADER,
_ARGS_COUNT
};
struct {
const char *fn;
const char *mode;
FILE *f;
} args[] = {
[ARGS_INPUT] = { .fn = argv[1], .mode = "r" },
[ARGS_CSOURCE] = { .fn = argv[2], .mode = "w" },
[ARGS_CHEADER] = { .fn = argv[3], .mode = "w" },
};
int ret = 1;
char prefix[128];
if (argc < 3) {
fprintf(stderr, "ERROR: wrong arguments\n");
print_usage(stderr, argv[0]);
return 1;
}
if (fn_to_prefix(args[ARGS_CHEADER].fn, prefix, sizeof(prefix)) < 0)
return 1;
for (int i = 0; i < _ARGS_COUNT; i++) {
args[i].f = fopen(args[i].fn, args[i].mode);
if (!args[i].f) {
fprintf(stderr, "ERROR: Can't open %s: %m\n",
args[i].fn);
goto err;
}
}
fprintf(args[ARGS_CHEADER].f, HEADER, args[ARGS_INPUT].fn, prefix, prefix);
ret = parse(args[ARGS_INPUT].f, args[ARGS_CSOURCE].f,
args[ARGS_CHEADER].f, prefix);
if (!ret)
fprintf(args[ARGS_CHEADER].f, FOOTER);
err:
for (int i = 0; i < _ARGS_COUNT; i++) {
if (args[i].f)
fclose(args[i].f);
}
return ret;
}
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