mirror of
https://git.tartarus.org/simon/putty.git
synced 2025-01-09 09:27:59 +00:00
3396c97da9
Now that the new CMake build system is encouraging us to lay out the code like a set of libraries, it seems like a good idea to make them look more _like_ libraries, by putting things into separate modules as far as possible. This fixes several previous annoyances in which you had to link against some object in order to get a function you needed, but that object also contained other functions you didn't need which included link-time symbol references you didn't want to have to deal with. The usual offender was subsidiary supporting programs including misc.c for some innocuous function and then finding they had to deal with the requirements of buildinfo(). This big reorganisation introduces three new subdirectories called 'utils', one at the top level and one in each platform subdir. In each case, the directory contains basically the same files that were previously placed in the 'utils' build-time library, except that the ones that were extremely miscellaneous (misc.c, utils.c, uxmisc.c, winmisc.c, winmiscs.c, winutils.c) have been split up into much smaller pieces.
319 lines
6.9 KiB
C
319 lines
6.9 KiB
C
#include <assert.h>
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#include <stddef.h>
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#include <string.h>
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#include "marshal.h"
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#include "misc.h"
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void BinarySink_put_data(BinarySink *bs, const void *data, size_t len)
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{
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bs->write(bs, data, len);
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}
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void BinarySink_put_datapl(BinarySink *bs, ptrlen pl)
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{
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BinarySink_put_data(bs, pl.ptr, pl.len);
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}
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void BinarySink_put_padding(BinarySink *bs, size_t len, unsigned char padbyte)
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{
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char buf[16];
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memset(buf, padbyte, sizeof(buf));
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while (len > 0) {
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size_t thislen = len < sizeof(buf) ? len : sizeof(buf);
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bs->write(bs, buf, thislen);
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len -= thislen;
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}
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}
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void BinarySink_put_byte(BinarySink *bs, unsigned char val)
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{
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bs->write(bs, &val, 1);
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}
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void BinarySink_put_bool(BinarySink *bs, bool val)
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{
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unsigned char cval = val ? 1 : 0;
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bs->write(bs, &cval, 1);
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}
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void BinarySink_put_uint16(BinarySink *bs, unsigned long val)
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{
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unsigned char data[2];
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PUT_16BIT_MSB_FIRST(data, val);
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bs->write(bs, data, sizeof(data));
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}
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void BinarySink_put_uint32(BinarySink *bs, unsigned long val)
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{
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unsigned char data[4];
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PUT_32BIT_MSB_FIRST(data, val);
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bs->write(bs, data, sizeof(data));
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}
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void BinarySink_put_uint64(BinarySink *bs, uint64_t val)
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{
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unsigned char data[8];
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PUT_64BIT_MSB_FIRST(data, val);
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bs->write(bs, data, sizeof(data));
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}
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void BinarySink_put_string(BinarySink *bs, const void *data, size_t len)
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{
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/* Check that the string length fits in a uint32, without doing a
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* potentially implementation-defined shift of more than 31 bits */
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assert((len >> 31) < 2);
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BinarySink_put_uint32(bs, len);
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bs->write(bs, data, len);
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}
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void BinarySink_put_stringpl(BinarySink *bs, ptrlen pl)
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{
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BinarySink_put_string(bs, pl.ptr, pl.len);
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}
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void BinarySink_put_stringz(BinarySink *bs, const char *str)
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{
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BinarySink_put_string(bs, str, strlen(str));
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}
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void BinarySink_put_stringsb(BinarySink *bs, struct strbuf *buf)
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{
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BinarySink_put_string(bs, buf->s, buf->len);
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strbuf_free(buf);
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}
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void BinarySink_put_asciz(BinarySink *bs, const char *str)
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{
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bs->write(bs, str, strlen(str) + 1);
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}
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bool BinarySink_put_pstring(BinarySink *bs, const char *str)
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{
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size_t len = strlen(str);
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if (len > 255)
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return false; /* can't write a Pascal-style string this long */
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BinarySink_put_byte(bs, len);
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bs->write(bs, str, len);
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return true;
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}
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/* ---------------------------------------------------------------------- */
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static bool BinarySource_data_avail(BinarySource *src, size_t wanted)
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{
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if (src->err)
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return false;
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if (wanted <= src->len - src->pos)
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return true;
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src->err = BSE_OUT_OF_DATA;
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return false;
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}
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#define avail(wanted) BinarySource_data_avail(src, wanted)
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#define advance(dist) (src->pos += dist)
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#define here ((const void *)((const unsigned char *)src->data + src->pos))
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#define consume(dist) \
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((const void *)((const unsigned char *)src->data + \
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((src->pos += dist) - dist)))
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ptrlen BinarySource_get_data(BinarySource *src, size_t wanted)
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{
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if (!avail(wanted))
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return make_ptrlen("", 0);
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return make_ptrlen(consume(wanted), wanted);
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}
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unsigned char BinarySource_get_byte(BinarySource *src)
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{
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const unsigned char *ucp;
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if (!avail(1))
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return 0;
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ucp = consume(1);
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return *ucp;
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}
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bool BinarySource_get_bool(BinarySource *src)
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{
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const unsigned char *ucp;
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if (!avail(1))
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return false;
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ucp = consume(1);
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return *ucp != 0;
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}
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unsigned BinarySource_get_uint16(BinarySource *src)
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{
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const unsigned char *ucp;
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if (!avail(2))
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return 0;
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ucp = consume(2);
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return GET_16BIT_MSB_FIRST(ucp);
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}
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unsigned long BinarySource_get_uint32(BinarySource *src)
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{
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const unsigned char *ucp;
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if (!avail(4))
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return 0;
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ucp = consume(4);
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return GET_32BIT_MSB_FIRST(ucp);
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}
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uint64_t BinarySource_get_uint64(BinarySource *src)
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{
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const unsigned char *ucp;
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if (!avail(8))
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return 0;
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ucp = consume(8);
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return GET_64BIT_MSB_FIRST(ucp);
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}
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ptrlen BinarySource_get_string(BinarySource *src)
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{
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const unsigned char *ucp;
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size_t len;
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if (!avail(4))
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return make_ptrlen("", 0);
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ucp = consume(4);
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len = GET_32BIT_MSB_FIRST(ucp);
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if (!avail(len))
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return make_ptrlen("", 0);
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return make_ptrlen(consume(len), len);
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}
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const char *BinarySource_get_asciz(BinarySource *src)
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{
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const char *start, *end;
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if (src->err)
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return "";
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start = here;
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end = memchr(start, '\0', src->len - src->pos);
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if (!end) {
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src->err = BSE_OUT_OF_DATA;
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return "";
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}
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advance(end + 1 - start);
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return start;
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}
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static ptrlen BinarySource_get_chars_internal(
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BinarySource *src, const char *set, bool include)
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{
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const char *start = here;
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while (avail(1)) {
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bool present = NULL != strchr(set, *(const char *)consume(0));
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if (present != include)
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break;
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(void) consume(1);
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}
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const char *end = here;
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return make_ptrlen(start, end - start);
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}
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ptrlen BinarySource_get_chars(BinarySource *src, const char *include_set)
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{
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return BinarySource_get_chars_internal(src, include_set, true);
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}
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ptrlen BinarySource_get_nonchars(BinarySource *src, const char *exclude_set)
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{
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return BinarySource_get_chars_internal(src, exclude_set, false);
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}
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ptrlen BinarySource_get_chomped_line(BinarySource *src)
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{
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const char *start, *end;
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if (src->err)
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return make_ptrlen(here, 0);
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start = here;
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end = memchr(start, '\n', src->len - src->pos);
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if (end)
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advance(end + 1 - start);
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else
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advance(src->len - src->pos);
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end = here;
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if (end > start && end[-1] == '\n')
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end--;
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if (end > start && end[-1] == '\r')
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end--;
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return make_ptrlen(start, end - start);
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}
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ptrlen BinarySource_get_pstring(BinarySource *src)
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{
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const unsigned char *ucp;
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size_t len;
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if (!avail(1))
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return make_ptrlen("", 0);
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ucp = consume(1);
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len = *ucp;
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if (!avail(len))
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return make_ptrlen("", 0);
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return make_ptrlen(consume(len), len);
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}
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void BinarySource_REWIND_TO__(BinarySource *src, size_t pos)
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{
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if (pos <= src->len) {
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src->pos = pos;
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src->err = BSE_NO_ERROR; /* clear any existing error */
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} else {
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src->pos = src->len;
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src->err = BSE_OUT_OF_DATA; /* new error if we rewind out of range */
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}
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}
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static void stdio_sink_write(BinarySink *bs, const void *data, size_t len)
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{
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stdio_sink *sink = BinarySink_DOWNCAST(bs, stdio_sink);
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fwrite(data, 1, len, sink->fp);
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}
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void stdio_sink_init(stdio_sink *sink, FILE *fp)
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{
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sink->fp = fp;
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BinarySink_INIT(sink, stdio_sink_write);
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}
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static void bufchain_sink_write(BinarySink *bs, const void *data, size_t len)
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{
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bufchain_sink *sink = BinarySink_DOWNCAST(bs, bufchain_sink);
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bufchain_add(sink->ch, data, len);
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}
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void bufchain_sink_init(bufchain_sink *sink, bufchain *ch)
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{
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sink->ch = ch;
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BinarySink_INIT(sink, bufchain_sink_write);
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}
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