diff options
author | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2023-06-04 20:26:14 +0200 |
---|---|---|
committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2023-06-05 09:16:39 +0200 |
commit | 1370963723917eed6c93e28c9970a2b27be57ea4 (patch) | |
tree | 14c6e45fc1a4ccd1721823d65edd8a892135e23d /lib/io | |
parent | 8af4ee6f415fe316894e4423235dfc4ee70d8cbb (diff) |
libio: remove buffer_offset from istream_t
Instead, make the buffer const, let the user adjust the pointer and
size. The offset can then be inferred in precache.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/io')
-rw-r--r-- | lib/io/src/get_line.c | 22 | ||||
-rw-r--r-- | lib/io/src/internal.h | 1 | ||||
-rw-r--r-- | lib/io/src/istream.c | 25 | ||||
-rw-r--r-- | lib/io/src/mem.c | 20 | ||||
-rw-r--r-- | lib/io/src/unix/istream.c | 30 | ||||
-rw-r--r-- | lib/io/src/win32/istream.c | 24 | ||||
-rw-r--r-- | lib/io/src/xfrm/istream.c | 37 | ||||
-rw-r--r-- | lib/io/test/istream_read.c | 2 | ||||
-rw-r--r-- | lib/io/test/istream_skip.c | 2 | ||||
-rw-r--r-- | lib/io/test/stream_splice.c | 2 | ||||
-rw-r--r-- | lib/io/test/xfrm.c | 1 |
11 files changed, 83 insertions, 83 deletions
diff --git a/lib/io/src/get_line.c b/lib/io/src/get_line.c index f7e0b59..19af208 100644 --- a/lib/io/src/get_line.c +++ b/lib/io/src/get_line.c @@ -41,8 +41,8 @@ static size_t trim(char *buffer, int flags) int istream_get_line(istream_t *strm, char **out, size_t *line_num, int flags) { + size_t i, count, line_len = 0; char *line = NULL, *new; - size_t i, line_len = 0; bool have_line = false; *out = NULL; @@ -70,24 +70,28 @@ int istream_get_line(istream_t *strm, char **out, } if (i < strm->buffer_used) { - have_line = true; - strm->buffer_offset = i + 1; + count = i++; + + if (count > 0 && strm->buffer[count - 1] == '\r') + --count; - if (i > 0 && strm->buffer[i - 1] == '\r') - --i; + have_line = true; } else { - strm->buffer_offset = i; + count = i; } - new = realloc(line, line_len + i + 1); + new = realloc(line, line_len + count + 1); if (new == NULL) goto fail_errno; line = new; - memcpy(line + line_len, strm->buffer, i); - line_len += i; + memcpy(line + line_len, strm->buffer, count); + line_len += count; line[line_len] = '\0'; + strm->buffer += i; + strm->buffer_used -= i; + if (have_line) { line_len = trim(line, flags); diff --git a/lib/io/src/internal.h b/lib/io/src/internal.h index 25a0196..1e51012 100644 --- a/lib/io/src/internal.h +++ b/lib/io/src/internal.h @@ -21,6 +21,7 @@ #include <stdarg.h> #include <stdlib.h> #include <unistd.h> +#include <assert.h> #include <ctype.h> #include <fcntl.h> #include <errno.h> diff --git a/lib/io/src/istream.c b/lib/io/src/istream.c index 2b89a00..0739fd6 100644 --- a/lib/io/src/istream.c +++ b/lib/io/src/istream.c @@ -16,7 +16,7 @@ sqfs_s32 istream_read(istream_t *strm, void *data, size_t size) size = 0x7FFFFFFF; while (size > 0) { - if (strm->buffer_offset >= strm->buffer_used) { + if (strm->buffer_used == 0) { if (istream_precache(strm)) return -1; @@ -24,13 +24,14 @@ sqfs_s32 istream_read(istream_t *strm, void *data, size_t size) break; } - diff = strm->buffer_used - strm->buffer_offset; + diff = strm->buffer_used; if (diff > size) diff = size; - memcpy(data, strm->buffer + strm->buffer_offset, diff); + memcpy(data, strm->buffer, diff); data = (char *)data + diff; - strm->buffer_offset += diff; + strm->buffer += diff; + strm->buffer_used -= diff; size -= diff; total += diff; } @@ -43,7 +44,7 @@ int istream_skip(istream_t *strm, sqfs_u64 size) size_t diff; while (size > 0) { - if (strm->buffer_offset >= strm->buffer_used) { + if (strm->buffer_used == 0) { if (istream_precache(strm)) return -1; @@ -54,11 +55,12 @@ int istream_skip(istream_t *strm, sqfs_u64 size) } } - diff = strm->buffer_used - strm->buffer_offset; + diff = strm->buffer_used; if ((sqfs_u64)diff > size) diff = size; - strm->buffer_offset += diff; + strm->buffer += diff; + strm->buffer_used -= diff; size -= diff; } @@ -74,7 +76,7 @@ sqfs_s32 istream_splice(istream_t *in, ostream_t *out, sqfs_u32 size) size = 0x7FFFFFFF; while (size > 0) { - if (in->buffer_offset >= in->buffer_used) { + if (in->buffer_used == 0) { if (istream_precache(in)) return -1; @@ -82,14 +84,15 @@ sqfs_s32 istream_splice(istream_t *in, ostream_t *out, sqfs_u32 size) break; } - diff = in->buffer_used - in->buffer_offset; + diff = in->buffer_used; if (diff > size) diff = size; - if (ostream_append(out, in->buffer + in->buffer_offset, diff)) + if (ostream_append(out, in->buffer, diff)) return -1; - in->buffer_offset += diff; + in->buffer += diff; + in->buffer_used -= diff; size -= diff; total += diff; } diff --git a/lib/io/src/mem.c b/lib/io/src/mem.c index d305a83..b1abbdb 100644 --- a/lib/io/src/mem.c +++ b/lib/io/src/mem.c @@ -10,6 +10,7 @@ #include <stdlib.h> #include <string.h> +#include <assert.h> typedef struct { istream_t base; @@ -28,17 +29,16 @@ static int mem_in_precache(istream_t *strm) mem_istream_t *mem = (mem_istream_t *)strm; size_t diff; - if (strm->buffer_offset >= strm->buffer_used) { - strm->buffer_offset = 0; - strm->buffer_used = 0; - } else if (strm->buffer_offset > 0) { - memmove(strm->buffer, - strm->buffer + strm->buffer_offset, - strm->buffer_used - strm->buffer_offset); + assert(strm->buffer >= mem->buffer); + assert(strm->buffer <= (mem->buffer + mem->bufsz)); + assert(strm->buffer_used <= mem->bufsz); + assert((size_t)(strm->buffer - mem->buffer) <= + (mem->bufsz - strm->buffer_used)); - strm->buffer_used -= strm->buffer_offset; - strm->buffer_offset = 0; - } + if (strm->buffer_used > 0) + memmove(mem->buffer, strm->buffer, strm->buffer_used); + + strm->buffer = mem->buffer; diff = mem->bufsz - strm->buffer_used; if (diff > mem->size) diff --git a/lib/io/src/unix/istream.c b/lib/io/src/unix/istream.c index 24b18d6..db870d9 100644 --- a/lib/io/src/unix/istream.c +++ b/lib/io/src/unix/istream.c @@ -17,25 +17,21 @@ typedef struct { static int file_precache(istream_t *strm) { file_istream_t *file = (file_istream_t *)strm; - ssize_t ret; - size_t diff; - - if (strm->buffer_offset >= strm->buffer_used) { - strm->buffer_offset = 0; - strm->buffer_used = 0; - } else if (strm->buffer_offset > 0) { - memmove(strm->buffer, - strm->buffer + strm->buffer_offset, - strm->buffer_used - strm->buffer_offset); - - strm->buffer_used -= strm->buffer_offset; - strm->buffer_offset = 0; - } - while (!strm->eof && strm->buffer_used < sizeof(file->buffer)) { - diff = sizeof(file->buffer) - strm->buffer_used; + assert(strm->buffer >= file->buffer); + assert(strm->buffer <= (file->buffer + BUFSZ)); + assert(strm->buffer_used <= BUFSZ); + assert((size_t)(strm->buffer - file->buffer) <= + (BUFSZ - strm->buffer_used)); + + if (strm->buffer_used > 0) + memmove(file->buffer, strm->buffer, strm->buffer_used); + + strm->buffer = file->buffer; - ret = read(file->fd, strm->buffer + strm->buffer_used, diff); + while (!strm->eof && strm->buffer_used < BUFSZ) { + ssize_t ret = read(file->fd, file->buffer + strm->buffer_used, + BUFSZ - strm->buffer_used); if (ret == 0) strm->eof = true; diff --git a/lib/io/src/win32/istream.c b/lib/io/src/win32/istream.c index 918b868..94c8584 100644 --- a/lib/io/src/win32/istream.c +++ b/lib/io/src/win32/istream.c @@ -23,27 +23,25 @@ static int file_precache(istream_t *strm) DWORD diff, actual; HANDLE hnd; - if (strm->buffer_offset >= strm->buffer_used) { - strm->buffer_offset = 0; - strm->buffer_used = 0; - } else if (strm->buffer_offset > 0) { - memmove(strm->buffer, - strm->buffer + strm->buffer_offset, - strm->buffer_used - strm->buffer_offset); - - strm->buffer_used -= strm->buffer_offset; - strm->buffer_offset = 0; - } - if (strm->eof) return 0; + assert(strm->buffer >= file->buffer); + assert(strm->buffer <= (file->buffer + BUFSZ)); + assert(strm->buffer_used <= BUFSZ); + assert((size_t)(strm->buffer - file->buffer) <= + (BUFSZ - strm->buffer_used)); + + if (strm->buffer_used > 0) + memmove(file->buffer, strm->buffer, strm->buffer_used); + + strm->buffer = file->buffer; hnd = file->path == NULL ? GetStdHandle(STD_INPUT_HANDLE) : file->hnd; while (strm->buffer_used < sizeof(file->buffer)) { diff = sizeof(file->buffer) - strm->buffer_used; - if (!ReadFile(hnd, strm->buffer + strm->buffer_used, + if (!ReadFile(hnd, file->buffer + strm->buffer_used, diff, &actual, NULL)) { DWORD error = GetLastError(); diff --git a/lib/io/src/xfrm/istream.c b/lib/io/src/xfrm/istream.c index b301209..152563f 100644 --- a/lib/io/src/xfrm/istream.c +++ b/lib/io/src/xfrm/istream.c @@ -20,28 +20,25 @@ static int xfrm_precache(istream_t *base) istream_xfrm_t *xfrm = (istream_xfrm_t *)base; int ret; - if (base->buffer_offset >= base->buffer_used) { - base->buffer_offset = 0; - base->buffer_used = 0; - } else if (base->buffer_offset > 0) { - memmove(base->buffer, - base->buffer + base->buffer_offset, - base->buffer_used - base->buffer_offset); - - base->buffer_used -= base->buffer_offset; - base->buffer_offset = 0; - } - if (base->eof) return 0; + assert(base->buffer >= xfrm->uncompressed); + assert(base->buffer <= (xfrm->uncompressed + BUFSZ)); + assert(base->buffer_used <= BUFSZ); + assert((size_t)(base->buffer - xfrm->uncompressed) <= + (BUFSZ - base->buffer_used)); + + if (base->buffer_used > 0) + memmove(xfrm->uncompressed, base->buffer, base->buffer_used); + + base->buffer = xfrm->uncompressed; + ret = istream_precache(xfrm->wrapped); if (ret != 0) return ret; for (;;) { - const sqfs_u32 in_sz = xfrm->wrapped->buffer_used; - const sqfs_u32 out_sz = sizeof(xfrm->uncompressed); sqfs_u32 in_off = 0, out_off = base->buffer_used; int mode = XFRM_STREAM_FLUSH_NONE; @@ -49,9 +46,10 @@ static int xfrm_precache(istream_t *base) mode = XFRM_STREAM_FLUSH_FULL; ret = xfrm->xfrm->process_data(xfrm->xfrm, - xfrm->wrapped->buffer, in_sz, - base->buffer + out_off, - out_sz - out_off, + xfrm->wrapped->buffer, + xfrm->wrapped->buffer_used, + xfrm->uncompressed + out_off, + BUFSZ - out_off, &in_off, &out_off, mode); if (ret == XFRM_STREAM_ERROR) { @@ -61,9 +59,10 @@ static int xfrm_precache(istream_t *base) } base->buffer_used = out_off; - xfrm->wrapped->buffer_offset = in_off; + xfrm->wrapped->buffer += in_off; + xfrm->wrapped->buffer_used -= in_off; - if (ret == XFRM_STREAM_BUFFER_FULL || out_off >= out_sz) + if (ret == XFRM_STREAM_BUFFER_FULL || out_off >= BUFSZ) break; ret = istream_precache(xfrm->wrapped); diff --git a/lib/io/test/istream_read.c b/lib/io/test/istream_read.c index 87e52c5..7029c38 100644 --- a/lib/io/test/istream_read.c +++ b/lib/io/test/istream_read.c @@ -101,7 +101,7 @@ int main(int argc, char **argv) } TEST_ASSERT(dummy->eof); - TEST_ASSERT(dummy->buffer_offset >= dummy->buffer_used); + TEST_ASSERT(dummy->buffer_used == 0); sqfs_drop(dummy); return EXIT_SUCCESS; } diff --git a/lib/io/test/istream_skip.c b/lib/io/test/istream_skip.c index 40d4ea4..c54a9cd 100644 --- a/lib/io/test/istream_skip.c +++ b/lib/io/test/istream_skip.c @@ -90,7 +90,7 @@ int main(int argc, char **argv) } TEST_ASSERT(dummy->eof); - TEST_ASSERT(dummy->buffer_offset >= dummy->buffer_used); + TEST_ASSERT(dummy->buffer_used == 0); sqfs_drop(dummy); return EXIT_SUCCESS; } diff --git a/lib/io/test/stream_splice.c b/lib/io/test/stream_splice.c index 9008d83..ab8a0e4 100644 --- a/lib/io/test/stream_splice.c +++ b/lib/io/test/stream_splice.c @@ -92,7 +92,7 @@ int main(int argc, char **argv) } TEST_ASSERT(in->eof); - TEST_ASSERT(in->buffer_offset >= in->buffer_used); + TEST_ASSERT(in->buffer_used == 0); TEST_EQUAL_UI(total, end2); TEST_EQUAL_UI(out_offset, end2); sqfs_drop(in); diff --git a/lib/io/test/xfrm.c b/lib/io/test/xfrm.c index d06c558..ffb1f37 100644 --- a/lib/io/test/xfrm.c +++ b/lib/io/test/xfrm.c @@ -440,7 +440,6 @@ static void run_unpack_test(const void *blob, size_t size) TEST_EQUAL_I(ret, 0); TEST_EQUAL_UI(mem_istream->buffer_used, 0); - TEST_EQUAL_UI(mem_istream->buffer_offset, 0); TEST_ASSERT(mem_istream->eof); sqfs_drop(istream); |