Fix empty initializer, which is not C99
diff --git a/internal/cgen/base/io-private.h b/internal/cgen/base/io-private.h
index 340144a..fad529b 100644
--- a/internal/cgen/base/io-private.h
+++ b/internal/cgen/base/io-private.h
@@ -17,7 +17,9 @@
// ---------------- I/O
// "Null" as in "/dev/null", not as in "nullptr".
-static wuffs_base__io_buffer wuffs_base__global__null_io_buffer = {};
+//
+// TODO: ensure that this is zero-initialized.
+static wuffs_base__io_buffer wuffs_base__global__null_io_buffer;
static inline wuffs_base__io_buffer* //
wuffs_base__null_io_reader() {
diff --git a/internal/cgen/data.go b/internal/cgen/data.go
index db3659e..09121da 100644
--- a/internal/cgen/data.go
+++ b/internal/cgen/data.go
@@ -163,13 +163,13 @@
""
const baseIOPrivateH = "" +
- "// ---------------- I/O\n\n// \"Null\" as in \"/dev/null\", not as in \"nullptr\".\nstatic wuffs_base__io_buffer wuffs_base__global__null_io_buffer = {};\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__null_io_reader() {\n return &wuffs_base__global__null_io_buffer;\n}\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__null_io_writer() {\n return &wuffs_base__global__null_io_buffer;\n}\n\nstatic inline uint64_t //\nwuffs_base__io__count_since(uint64_t mark, uint64_t index) {\n if (index >= mark) {\n return index - mark;\n }\n return 0;\n}\n\nstatic inline wuffs_base__slice_u8 //\nwuffs_base__io__since(uint64_t mark, uint64_t index, uint8_t* ptr) {\n if (index >= mark) {\n return wuffs_base__make_slice_u8(ptr + mark, index - mark);\n }\n return wuffs_base__make_slice_u8(NULL, 0);\n}\n\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_history(uint8_t** ptr_iop_w,\n uint8_t* io1_w,\n uint8_t* io2_w,\n " +
- " uint32_t length,\n uint32_t distance) {\n if (!distance) {\n return 0;\n }\n uint8_t* p = *ptr_iop_w;\n if ((size_t)(p - io1_w) < (size_t)(distance)) {\n return 0;\n }\n uint8_t* q = p - distance;\n size_t n = (size_t)(io2_w - p);\n if ((size_t)(length) > n) {\n length = (uint32_t)(n);\n } else {\n n = (size_t)(length);\n }\n // TODO: unrolling by 3 seems best for the std/deflate benchmarks, but that\n // is mostly because 3 is the minimum length for the deflate format. This\n // function implementation shouldn't overfit to that one format. Perhaps the\n // copy_n_from_history Wuffs method should also take an unroll hint argument,\n // and the cgen can look if that argument is the constant expression '3'.\n //\n // See also wuffs_base__io_writer__copy_n_from_history_fast below.\n //\n // Alternatively, or additionally, have a sloppy_copy_n_from_history method\n // that copies 8 bytes at a time, possibly writing more than length bytes?\n for (;" +
- " n >= 3; n -= 3) {\n *p++ = *q++;\n *p++ = *q++;\n *p++ = *q++;\n }\n for (; n; n--) {\n *p++ = *q++;\n }\n *ptr_iop_w = p;\n return length;\n}\n\n// wuffs_base__io_writer__copy_n_from_history_fast is like the\n// wuffs_base__io_writer__copy_n_from_history function above, but has stronger\n// pre-conditions. The caller needs to prove that:\n// - distance > 0\n// - distance <= (*ptr_iop_w - io1_w)\n// - length <= (io2_w - *ptr_iop_w)\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_history_fast(uint8_t** ptr_iop_w,\n uint8_t* io1_w,\n uint8_t* io2_w,\n uint32_t length,\n uint32_t distance) {\n uint8_t* p = *ptr_iop_w;\n uint8_t* q = p - distance;\n uint32_t n = length;\n for (; n >= 3; n -= 3) {\n *p++ = *q++;\n *p++ = *q++;\n *p++ = *q++;\n }\n for (; n; n--) {\n *p++ = *q++;\n }\n *ptr_iop_w = p;" +
- "\n return length;\n}\n\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_reader(uint8_t** ptr_iop_w,\n uint8_t* io2_w,\n uint32_t length,\n uint8_t** ptr_iop_r,\n uint8_t* io2_r) {\n uint8_t* iop_w = *ptr_iop_w;\n size_t n = length;\n if (n > ((size_t)(io2_w - iop_w))) {\n n = (size_t)(io2_w - iop_w);\n }\n uint8_t* iop_r = *ptr_iop_r;\n if (n > ((size_t)(io2_r - iop_r))) {\n n = (size_t)(io2_r - iop_r);\n }\n if (n > 0) {\n memmove(iop_w, iop_r, n);\n *ptr_iop_w += n;\n *ptr_iop_r += n;\n }\n return (uint32_t)(n);\n}\n\nstatic inline uint64_t //\nwuffs_base__io_writer__copy_from_slice(uint8_t** ptr_iop_w,\n uint8_t* io2_w,\n wuffs_base__slice_u8 src) {\n uint8_t* iop_w = *ptr_iop_w;\n size_t n = src.len;\n if (n > ((size_t)(io2_w - iop_w))) {\n n = (size_t)(io" +
- "2_w - iop_w);\n }\n if (n > 0) {\n memmove(iop_w, src.ptr, n);\n *ptr_iop_w += n;\n }\n return (uint64_t)(n);\n}\n\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_slice(uint8_t** ptr_iop_w,\n uint8_t* io2_w,\n uint32_t length,\n wuffs_base__slice_u8 src) {\n uint8_t* iop_w = *ptr_iop_w;\n size_t n = src.len;\n if (n > length) {\n n = length;\n }\n if (n > ((size_t)(io2_w - iop_w))) {\n n = (size_t)(io2_w - iop_w);\n }\n if (n > 0) {\n memmove(iop_w, src.ptr, n);\n *ptr_iop_w += n;\n }\n return (uint32_t)(n);\n}\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__io_reader__set(wuffs_base__io_buffer* b,\n uint8_t** ptr_iop_r,\n uint8_t** ptr_io0_r,\n uint8_t** ptr_io1_r,\n uint8_t** ptr_io2_r,\n wuffs_base__slice_u8 data) {\n b->data = data;\n b->m" +
- "eta.wi = data.len;\n b->meta.ri = 0;\n b->meta.pos = 0;\n b->meta.closed = false;\n\n *ptr_iop_r = data.ptr;\n *ptr_io0_r = data.ptr;\n *ptr_io1_r = data.ptr;\n *ptr_io2_r = data.ptr + data.len;\n\n return b;\n}\n\nstatic inline wuffs_base__slice_u8 //\nwuffs_base__io_reader__take(uint8_t** ptr_iop_r, uint8_t* io2_r, uint64_t n) {\n if (n <= ((size_t)(io2_r - *ptr_iop_r))) {\n uint8_t* p = *ptr_iop_r;\n *ptr_iop_r += n;\n return wuffs_base__make_slice_u8(p, n);\n }\n return wuffs_base__make_slice_u8(NULL, 0);\n}\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__io_writer__set(wuffs_base__io_buffer* b,\n uint8_t** ptr_iop_w,\n uint8_t** ptr_io0_w,\n uint8_t** ptr_io1_w,\n uint8_t** ptr_io2_w,\n wuffs_base__slice_u8 data) {\n b->data = data;\n b->meta.wi = 0;\n b->meta.ri = 0;\n b->meta.pos = 0;\n b->meta.closed = false;\n\n *ptr_iop_w = data.ptr;\n *ptr_io0_w = data.ptr;\n *ptr_io1_w " +
- "= data.ptr;\n *ptr_io2_w = data.ptr + data.len;\n\n return b;\n}\n\n" +
+ "// ---------------- I/O\n\n// \"Null\" as in \"/dev/null\", not as in \"nullptr\".\n//\n// TODO: ensure that this is zero-initialized.\nstatic wuffs_base__io_buffer wuffs_base__global__null_io_buffer;\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__null_io_reader() {\n return &wuffs_base__global__null_io_buffer;\n}\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__null_io_writer() {\n return &wuffs_base__global__null_io_buffer;\n}\n\nstatic inline uint64_t //\nwuffs_base__io__count_since(uint64_t mark, uint64_t index) {\n if (index >= mark) {\n return index - mark;\n }\n return 0;\n}\n\nstatic inline wuffs_base__slice_u8 //\nwuffs_base__io__since(uint64_t mark, uint64_t index, uint8_t* ptr) {\n if (index >= mark) {\n return wuffs_base__make_slice_u8(ptr + mark, index - mark);\n }\n return wuffs_base__make_slice_u8(NULL, 0);\n}\n\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_history(uint8_t** ptr_iop_w,\n uint8_t* io1_w,\n " +
+ " uint8_t* io2_w,\n uint32_t length,\n uint32_t distance) {\n if (!distance) {\n return 0;\n }\n uint8_t* p = *ptr_iop_w;\n if ((size_t)(p - io1_w) < (size_t)(distance)) {\n return 0;\n }\n uint8_t* q = p - distance;\n size_t n = (size_t)(io2_w - p);\n if ((size_t)(length) > n) {\n length = (uint32_t)(n);\n } else {\n n = (size_t)(length);\n }\n // TODO: unrolling by 3 seems best for the std/deflate benchmarks, but that\n // is mostly because 3 is the minimum length for the deflate format. This\n // function implementation shouldn't overfit to that one format. Perhaps the\n // copy_n_from_history Wuffs method should also take an unroll hint argument,\n // and the cgen can look if that argument is the constant expression '3'.\n //\n // See also wuffs_base__io_writer__copy_n_from_history_fast below.\n //\n // Alternatively, or additionally, have a sloppy_copy_n_from_history method\n // that copies 8 bytes at a time, poss" +
+ "ibly writing more than length bytes?\n for (; n >= 3; n -= 3) {\n *p++ = *q++;\n *p++ = *q++;\n *p++ = *q++;\n }\n for (; n; n--) {\n *p++ = *q++;\n }\n *ptr_iop_w = p;\n return length;\n}\n\n// wuffs_base__io_writer__copy_n_from_history_fast is like the\n// wuffs_base__io_writer__copy_n_from_history function above, but has stronger\n// pre-conditions. The caller needs to prove that:\n// - distance > 0\n// - distance <= (*ptr_iop_w - io1_w)\n// - length <= (io2_w - *ptr_iop_w)\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_history_fast(uint8_t** ptr_iop_w,\n uint8_t* io1_w,\n uint8_t* io2_w,\n uint32_t length,\n uint32_t distance) {\n uint8_t* p = *ptr_iop_w;\n uint8_t* q = p - distance;\n uint32_t n = length;\n for (; n >= 3; n -= 3) {\n *p++ = *q++;\n *p++ = *q++;\n *p++ = *q++;\n }\n for (; n; " +
+ "n--) {\n *p++ = *q++;\n }\n *ptr_iop_w = p;\n return length;\n}\n\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_reader(uint8_t** ptr_iop_w,\n uint8_t* io2_w,\n uint32_t length,\n uint8_t** ptr_iop_r,\n uint8_t* io2_r) {\n uint8_t* iop_w = *ptr_iop_w;\n size_t n = length;\n if (n > ((size_t)(io2_w - iop_w))) {\n n = (size_t)(io2_w - iop_w);\n }\n uint8_t* iop_r = *ptr_iop_r;\n if (n > ((size_t)(io2_r - iop_r))) {\n n = (size_t)(io2_r - iop_r);\n }\n if (n > 0) {\n memmove(iop_w, iop_r, n);\n *ptr_iop_w += n;\n *ptr_iop_r += n;\n }\n return (uint32_t)(n);\n}\n\nstatic inline uint64_t //\nwuffs_base__io_writer__copy_from_slice(uint8_t** ptr_iop_w,\n uint8_t* io2_w,\n wuffs_base__slice_u8 src) {\n uint8_t* iop_w = *ptr_iop_w;\n size_t n = src.len;\n if (n > ((s" +
+ "ize_t)(io2_w - iop_w))) {\n n = (size_t)(io2_w - iop_w);\n }\n if (n > 0) {\n memmove(iop_w, src.ptr, n);\n *ptr_iop_w += n;\n }\n return (uint64_t)(n);\n}\n\nstatic inline uint32_t //\nwuffs_base__io_writer__copy_n_from_slice(uint8_t** ptr_iop_w,\n uint8_t* io2_w,\n uint32_t length,\n wuffs_base__slice_u8 src) {\n uint8_t* iop_w = *ptr_iop_w;\n size_t n = src.len;\n if (n > length) {\n n = length;\n }\n if (n > ((size_t)(io2_w - iop_w))) {\n n = (size_t)(io2_w - iop_w);\n }\n if (n > 0) {\n memmove(iop_w, src.ptr, n);\n *ptr_iop_w += n;\n }\n return (uint32_t)(n);\n}\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__io_reader__set(wuffs_base__io_buffer* b,\n uint8_t** ptr_iop_r,\n uint8_t** ptr_io0_r,\n uint8_t** ptr_io1_r,\n uint8_t** ptr_io2_r,\n wuffs_ba" +
+ "se__slice_u8 data) {\n b->data = data;\n b->meta.wi = data.len;\n b->meta.ri = 0;\n b->meta.pos = 0;\n b->meta.closed = false;\n\n *ptr_iop_r = data.ptr;\n *ptr_io0_r = data.ptr;\n *ptr_io1_r = data.ptr;\n *ptr_io2_r = data.ptr + data.len;\n\n return b;\n}\n\nstatic inline wuffs_base__slice_u8 //\nwuffs_base__io_reader__take(uint8_t** ptr_iop_r, uint8_t* io2_r, uint64_t n) {\n if (n <= ((size_t)(io2_r - *ptr_iop_r))) {\n uint8_t* p = *ptr_iop_r;\n *ptr_iop_r += n;\n return wuffs_base__make_slice_u8(p, n);\n }\n return wuffs_base__make_slice_u8(NULL, 0);\n}\n\nstatic inline wuffs_base__io_buffer* //\nwuffs_base__io_writer__set(wuffs_base__io_buffer* b,\n uint8_t** ptr_iop_w,\n uint8_t** ptr_io0_w,\n uint8_t** ptr_io1_w,\n uint8_t** ptr_io2_w,\n wuffs_base__slice_u8 data) {\n b->data = data;\n b->meta.wi = 0;\n b->meta.ri = 0;\n b->meta.pos = 0;\n b->meta.closed = false;\n\n *ptr_iop_w = dat" +
+ "a.ptr;\n *ptr_io0_w = data.ptr;\n *ptr_io1_w = data.ptr;\n *ptr_io2_w = data.ptr + data.len;\n\n return b;\n}\n\n" +
"" +
"// ---------------- I/O (Utility)\n\n#define wuffs_base__utility__null_io_reader wuffs_base__null_io_reader\n#define wuffs_base__utility__null_io_writer wuffs_base__null_io_writer\n" +
""
diff --git a/release/c/wuffs-unsupported-snapshot.c b/release/c/wuffs-unsupported-snapshot.c
index ebe1154..964d7dd 100644
--- a/release/c/wuffs-unsupported-snapshot.c
+++ b/release/c/wuffs-unsupported-snapshot.c
@@ -4457,7 +4457,9 @@
// ---------------- I/O
// "Null" as in "/dev/null", not as in "nullptr".
-static wuffs_base__io_buffer wuffs_base__global__null_io_buffer = {};
+//
+// TODO: ensure that this is zero-initialized.
+static wuffs_base__io_buffer wuffs_base__global__null_io_buffer;
static inline wuffs_base__io_buffer* //
wuffs_base__null_io_reader() {
