145 lines
2.9 KiB
C
145 lines
2.9 KiB
C
#include "stream.h"
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#include "lib.h"
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#include <errno.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static uint64_t longswap(uint64_t ll) {
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if (htons(20) == 20)
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return ll;
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union { uint64_t ll; uint8_t c[8]; } out = {0};
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union { uint64_t ll; uint8_t c[8]; } in = {ll};
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for (int i = 0; i < 8; i++)
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out.c[7-i] = in.c[i];
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return out.ll;
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}
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stream_t stream_open(const char *path, const char* mode) {
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stream_t stream;
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if (strcmp("-", path) == 0) {
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if (*mode == 'r')
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stream.__file = stdin;
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else
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stream.__file = stdout;
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stream.__alloc = false;
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return stream;
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}
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stream.__file = fopen(path, mode);
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stream.__alloc = true;
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if (stream.__file == NULL) {
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perror_and_die("cannot open '%s'", path);
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};
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return stream;
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}
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void stream_close(stream_t *stream) {
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if (stream->__alloc)
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fclose(stream->__file);
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}
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bool stream_read(const stream_t *stream, void *res, size_t amount) {
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size_t read;
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read = fread(res, 1, amount, stream->__file);
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if (read == 0) {
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if (feof(stream->__file) || errno == 0)
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return false;
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else
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perror_and_die("cannot read from stream");
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}
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return true;
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}
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bool stream_read_i8(const stream_t *stream, int8_t *res) {
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if (stream_read(stream, res, 1) == false)
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return false;
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return true;
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}
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bool stream_read_i16(const stream_t *stream, int16_t *res) {
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if (stream_read(stream, res, 2) == false)
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return false;
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*res = ntohs(*res);
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return true;
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}
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bool stream_read_i32(const stream_t *stream, int32_t *res) {
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if (stream_read(stream, res, 4) == false)
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return false;
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*res = ntohl(*res);
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return true;
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}
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bool stream_read_i64(const stream_t *stream, int64_t *res) {
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if (stream_read(stream, res, 8) == false)
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return false;
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*res = longswap(*res);
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return true;
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}
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bool stream_read_u16(const stream_t *stream, uint16_t *res) {
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if (stream_read(stream, res, 2) == false)
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return false;
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*res = ntohs(*res);
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return true;
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}
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bool stream_write(const stream_t *stream, const void *buf, size_t amount) {
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size_t wrote;
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wrote = fwrite(buf, 1, amount, stream->__file);
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if (wrote == 0)
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perror_and_die("cannot write to stream");
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if (wrote < amount)
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return false;
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return true;
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}
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bool stream_write_i8(const stream_t *stream, int8_t b) {
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if (stream_write(stream, &b, 1) == false)
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return false;
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return true;
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}
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bool stream_write_i16(const stream_t *stream, int16_t s) {
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s = htons(s);
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if (stream_write(stream, &s, 2) == false)
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return false;
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return true;
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}
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bool stream_write_i32(const stream_t *stream, int32_t i) {
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i = htonl(i);
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if (stream_write(stream, &i, 4) == false)
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return false;
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return true;
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}
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bool stream_write_i64(const stream_t *stream, int64_t l) {
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l = longswap(l);
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if (stream_write(stream, &l, 8) == false)
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return false;
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return true;
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}
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bool stream_write_u16(const stream_t *stream, uint16_t s) {
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s = htons(s);
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if (stream_write(stream, &s, 2) == false)
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return false;
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return true;
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}
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