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Add world.in.read stdin capability #185

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Add world.in.read stdin capability #185

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29bd87b
Parse and check world.in.read
WalterGropius May 21, 2026
d91ebaf
Gate world.in.read on stdin target capability
WalterGropius May 21, 2026
0a94978
Add zero_world_read runtime stdin shim
WalterGropius May 21, 2026
38e5375
Add conformance fixtures for world.in.read stdin
WalterGropius May 21, 2026
290a7e0
Document world.in.read and stdin target capability
WalterGropius May 21, 2026
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Add zero_world_read runtime stdin shim
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@WalterGropius
WalterGropius committed May 21, 2026
commit 0a94978c3373519bdce5b56ce62e9be9ce936626
2 changes: 2 additions & 0 deletions native/zero-c/include/zero_runtime.h
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,8 @@ typedef enum {

int zero_world_write(int fd, const char *buf, unsigned len);

unsigned zero_world_read(int fd, char *buf, unsigned len);

int64_t zero_json_parse_bytes(ZeroByteView input);

uint64_t zero_http_fetch_result(
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14 changes: 14 additions & 0 deletions native/zero-c/runtime/zero_runtime.c
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Expand Up @@ -6,10 +6,12 @@
#include <io.h>
typedef int ZeroWriteResult;
#define ZERO_RUNTIME_WRITE _write
#define ZERO_RUNTIME_READ _read
#else
#include <unistd.h>
typedef ssize_t ZeroWriteResult;
#define ZERO_RUNTIME_WRITE write
#define ZERO_RUNTIME_READ read
#endif

int zero_world_write(int fd, const char *buf, unsigned len) {
Expand All @@ -30,6 +32,18 @@ int zero_world_write(int fd, const char *buf, unsigned len) {
return 0;
}

unsigned zero_world_read(int fd, char *buf, unsigned len) {
if (len == 0 || !buf) return 0;
for (;;) {
ZeroWriteResult got = ZERO_RUNTIME_READ(fd, buf, len);
if (got < 0) {
if (errno == EINTR) continue;
return 0;
}
return (unsigned)got;
}
}

typedef struct {
const unsigned char *ptr;
size_t len;
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