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#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "arg.h"
#include "file.h"
#include "process.h"
#include "types.h"
#include "util.h"
#define INVERT_T "\x1b[7m"
#define UINVERT_T "\x1b[27m"
#define GREY "\x1b[90m"
#define RESET "\x1b[0m"
FILE *st;
FILE *err;
void run(FILE *fp, char *filename, bool tty) {
const char *invert_t = conf.color ? INVERT_T : "";
const char *grey = conf.color ? GREY : "";
const char *reset = conf.color ? RESET : "";
struct filedata f;
f = readfile(fp, conf.stdin);
if (conf.pager) {
st = popen("less", "w");
err = st;
if (st == NULL)
die("popen 'less'");
}
if (conf.force_binary > 0) {
f.binary = true;
} else if (conf.force_binary == 0) {
f.binary = false;
}
if (conf.headers) {
char *addon = f.binary ? "<binary>" : "";
if (conf.pager)
fprintf(err, "%s%s%s%s\r\n", invert_t, basename(filename), addon, reset);
else
fprintf(err, "\x1b[2K\r%s%s%s%s\r\n", invert_t, basename(filename), addon,
reset);
}
conf.process = (tty && !f.binary);
if (conf.process) { // file display processing
loadlines(&f);
}
if (conf.process) {
int linecount = 1;
for (int i = 0; i < f.lc; i++) {
if (conf.lines) {
char *padding = linepad(linecount, f.lc);
fprintf(st, "%s%s%d│%s ", grey, padding, i + 1, reset);
fwrite(f.lines[i].buf, 1, f.lines[i].len, st);
fprintf(st, "\n");
free(padding);
linecount++;
} else {
fprintf(st, "%s\n", f.lines[i].buf);
}
free(f.lines[i].buf);
}
} else {
fwrite(f.buf, 1, f.buflen, st);
fflush(st);
fwrite("\n", 1, 1, err);
}
free(f.buf);
fflush(st); // prevent timing inconsistencies between st and err
fflush(err);
if (conf.headers) {
float rounded;
char *format = formatbytes(f.buflen, &rounded);
fprintf(err, "%s%.2f %s%s\r\n", invert_t, rounded, format, reset);
}
if (conf.pager) {
pclose(st); // err is already the same as st
st = stdout;
err = stderr;
}
}
void initconf(void) {
conf.force_binary = -1;
conf.stdin = false;
conf.has_read_stdin = false;
conf.pager = false;
conf.process = true;
conf.headers = true;
conf.color = true;
conf.lines = true;
}
void clearstdin(void) {
// from
// https://stackoverflow.com/questions/7898215/how-to-clear-input-buffer-in-c
fseek(stdin, 0, SEEK_END);
}
int main(int argc, char *argv[]) {
initconf();
st = stdout;
err = stderr;
// init no_color first so that args take priority
char *no_color = getenv("NO_COLOR");
if (no_color != NULL && no_color[0] != '\0') {
conf.color = false;
}
bool tty = isatty(STDOUT_FILENO);
if (argc > 1) {
int offset = parseargs(argc, argv);
conf.headers = conf.headers && tty; // tty still overrides user
conf.pager = conf.pager && tty;
for (int i = offset; i < argc; i++) {
if (*argv[i] == '-') {
if (conf.has_read_stdin)
clearstdin();
conf.has_read_stdin = true;
conf.stdin = true;
run(stdin, "stdin", tty);
continue;
}
conf.stdin = false;
FILE *fp = fopen(argv[i], "rb");
if (fp == NULL)
die(argv[i]);
run(fp, argv[i], tty);
fclose(fp);
if (tty && (i + 1 != argc)) {
printf("offset: %d argc: %d\n", i, argc);
fprintf(err, "\r\n"); // separate concurrent files in tty
}
}
if (offset == argc) {
conf.stdin = true;
run(stdin, "stdin", tty);
}
} else {
conf.stdin = true;
run(stdin, "stdin", tty); // for piped-input or repl-like behavior
}
return EXIT_SUCCESS;
}
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