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/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <err.h>
#include <regex.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include "hilex.h"
static const struct {
const struct Lexer *lexer;
const char *name;
const char *pattern;
} Lexers[] = {
{ &LexC, "c", "[.][chlmy]$" },
{ &LexText, "text", "[.]txt$" },
};
static const struct Lexer *parseLexer(const char *name) {
for (size_t i = 0; i < ARRAY_LEN(Lexers); ++i) {
if (!strcmp(name, Lexers[i].name)) return Lexers[i].lexer;
}
errx(EX_USAGE, "unknown lexer %s", name);
}
static const struct Lexer *matchLexer(const char *name) {
regex_t regex;
for (size_t i = 0; i < ARRAY_LEN(Lexers); ++i) {
int error = regcomp(
®ex, Lexers[i].pattern, REG_EXTENDED | REG_NOSUB
);
assert(!error);
error = regexec(®ex, name, 0, NULL, 0);
regfree(®ex);
if (!error) return Lexers[i].lexer;
}
return NULL;
}
static const struct {
const struct Formatter *formatter;
const char *name;
} Formatters[] = {
{ &FormatANSI, "ansi" },
{ &FormatDebug, "debug" },
};
static const struct Formatter *parseFormatter(const char *name) {
for (size_t i = 0; i < ARRAY_LEN(Formatters); ++i) {
if (!strcmp(name, Formatters[i].name)) return Formatters[i].formatter;
}
errx(EX_USAGE, "unknown formatter %s", name);
}
static const char *ClassName[] = {
#define X(class) [class] = #class,
ENUM_CLASS
#undef X
};
static void
debugFormat(const char *opts[], enum Class class, const char *text) {
printf("%s(\33[3m", ClassName[class]);
FormatANSI.format(opts, class, text);
printf("\33[m)");
}
const struct Formatter FormatDebug = { .format = debugFormat };
int main(int argc, char *argv[]) {
bool text = false;
const char *name = NULL;
const struct Lexer *lexer = NULL;
const struct Formatter *formatter = &FormatANSI;
for (int opt; 0 < (opt = getopt(argc, argv, "f:l:n:t"));) {
switch (opt) {
break; case 'f': formatter = parseFormatter(optarg);
break; case 'l': lexer = parseLexer(optarg);
break; case 'n': name = optarg;
break; case 't': text = true;
}
}
const char *path = "(stdin)";
FILE *file = stdin;
if (optind < argc) {
path = argv[optind];
file = fopen(path, "r");
if (!file) err(EX_NOINPUT, "%s", path);
}
if (!name) {
if (NULL != (name = strrchr(path, '/'))) {
name++;
} else {
name = path;
}
}
if (!lexer) lexer = matchLexer(name);
if (!lexer && text) lexer = &LexText;
if (!lexer) errx(EX_USAGE, "cannot infer lexer for %s", name);
*lexer->in = file;
if (formatter->header) formatter->header(NULL);
for (enum Class class; None != (class = lexer->lex());) {
formatter->format(NULL, class, *lexer->text);
}
if (formatter->footer) formatter->footer(NULL);
}
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