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@@ -0,0 +1,655 @@
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+
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+#include "upb/json_encode.h"
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+
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+#include <ctype.h>
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+#include <float.h>
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+#include <inttypes.h>
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+#include <stdarg.h>
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+#include <stdio.h>
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+#include <string.h>
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+#include <setjmp.h>
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+
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+#include "upb/decode.h"
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+#include "upb/reflection.h"
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+
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+#include "upb/port_def.inc"
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+
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+typedef struct {
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+ char *buf, *ptr, *end;
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+ size_t overflow;
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+ int indent_depth;
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+ int options;
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+ const upb_symtab *ext_pool;
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+ jmp_buf err;
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+ upb_status *status;
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+ upb_arena *arena;
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+} jsonenc;
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+
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+static void jsonenc_msg(jsonenc *e, const upb_msg *msg, const upb_msgdef *m);
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+static void jsonenc_scalar(jsonenc *e, upb_msgval val, const upb_fielddef *f);
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+static void jsonenc_msgfield(jsonenc *e, const upb_msg *msg,
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+ const upb_msgdef *m);
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+static void jsonenc_value(jsonenc *e, const upb_msg *msg, const upb_msgdef *m);
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+
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+static void jsonenc_err(jsonenc *e, const char *msg) {
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+ upb_status_seterrmsg(e->status, msg);
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+ longjmp(e->err, 1);
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+}
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+
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+static void jsonenc_putbytes(jsonenc *e, const void *data, size_t len) {
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+ size_t have = e->end - e->ptr;
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+ if (UPB_LIKELY(have >= len)) {
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+ memcpy(e->ptr, data, len);
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+ e->ptr += len;
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+ } else {
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+ memcpy(e->ptr, data, have);
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+ e->ptr += have;
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+ e->overflow += (len - have);
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+ }
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+}
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+
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+static void jsonenc_putstr(jsonenc *e, const char *str) {
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+ jsonenc_putbytes(e, str, strlen(str));
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+}
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+
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+static void jsonenc_printf(jsonenc *e, const char *fmt, ...) {
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+ size_t n;
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+ size_t have = e->end - e->ptr;
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+ va_list args;
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+
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+ va_start(args, fmt);
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+ n = _upb_vsnprintf(e->ptr, have, fmt, args);
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+ va_end(args);
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+
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+ if (UPB_LIKELY(have > n)) {
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+ e->ptr += n;
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+ } else {
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+ e->ptr += have;
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+ e->overflow += (n - have);
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+ }
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+}
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+
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+static void jsonenc_nanos(jsonenc *e, int32_t nanos) {
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+ const char zeros[3] = "000";
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+
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+ if (nanos == 0) return;
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+ if (nanos < 0 || nanos >= 1000000000) {
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+ jsonenc_err(e, "error formatting timestamp as JSON: invalid nanos");
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+ }
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+
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+ jsonenc_printf(e, "%09" PRId32, nanos);
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+
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+ /* Remove trailing zeros, 3 at a time. */
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+ while ((e->ptr - e->buf) >= 3 && memcmp(e->ptr, zeros, 3) == 0) {
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+ e->ptr -= 3;
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+ }
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+}
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+
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+static void jsonenc_timestamp(jsonenc *e, const upb_msg *msg,
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+ const upb_msgdef *m) {
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+ const upb_fielddef *seconds_f = upb_msgdef_itof(m, 1);
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+ const upb_fielddef *nanos_f = upb_msgdef_itof(m, 2);
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+ int64_t seconds = upb_msg_get(msg, seconds_f).int64_val;
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+ int32_t nanos = upb_msg_get(msg, nanos_f).int32_val;
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+ int L, N, I, J, K, hour, min, sec;
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+
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+ if (seconds < -62135596800) {
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+ jsonenc_err(e,
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+ "error formatting timestamp as JSON: minimum acceptable value "
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+ "is 0001-01-01T00:00:00Z");
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+ } else if (seconds > 253402300799) {
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+ jsonenc_err(e,
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+ "error formatting timestamp as JSON: maximum acceptable value "
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+ "is 9999-12-31T23:59:59Z");
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+ }
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+
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+ /* Julian Day -> Y/M/D, Algorithm from:
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+ * Fliegel, H. F., and Van Flandern, T. C., "A Machine Algorithm for
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+ * Processing Calendar Dates," Communications of the Association of
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+ * Computing Machines, vol. 11 (1968), p. 657. */
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+ L = (seconds / 86400) + 2440588;
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+ N = 4 * L / 146097;
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+ L = L - (146097 * N + 3) / 4;
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+ I = 4000 * (L + 1) / 1461001;
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+ L = L - 1461 * I / 4 + 31;
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+ J = 80 * L / 2447;
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+ K = L - 2447 * J / 80;
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+ L = J / 11;
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+ J = J + 2 - 12 * L;
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+ I = 100 * (N - 49) + I + L;
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+
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+ sec = seconds % 60;
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+ min = (seconds / 60) % 60;
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+ hour = (seconds / 3600) % 24;
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+
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+ jsonenc_printf(e, "\"%04d-%02d-%02dT%02d:%02d:%02d", I, J, K, hour, min, sec);
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+ jsonenc_nanos(e, nanos);
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+ jsonenc_putstr(e, "Z\"");
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+}
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+
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+static void jsonenc_duration(jsonenc *e, const upb_msg *msg, const upb_msgdef *m) {
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+ const upb_fielddef *seconds_f = upb_msgdef_itof(m, 1);
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+ const upb_fielddef *nanos_f = upb_msgdef_itof(m, 2);
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+ int64_t seconds = upb_msg_get(msg, seconds_f).int64_val;
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+ int32_t nanos = upb_msg_get(msg, nanos_f).int32_val;
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+
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+ if (seconds > 315576000000 || seconds < -315576000000 ||
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+ (seconds < 0) != (nanos < 0)) {
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+ jsonenc_err(e, "bad duration");
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+ }
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+
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+ jsonenc_printf(e, "\"%" PRId64, seconds);
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+ jsonenc_nanos(e, nanos);
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+ jsonenc_putstr(e, "s\"");
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+}
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+
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+static void jsonenc_enum(int32_t val, const upb_fielddef *f, jsonenc *e) {
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+ const upb_enumdef *e_def = upb_fielddef_enumsubdef(f);
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+ const char *name = upb_enumdef_iton(e_def, val);
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+
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+ if (name) {
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+ jsonenc_printf(e, "\"%s\"", name);
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+ } else {
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+ jsonenc_printf(e, "%" PRId32, val);
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+ }
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+}
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+
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+static void jsonenc_bytes(jsonenc *e, upb_strview str) {
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+ /* This is the regular base64, not the "web-safe" version. */
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+ static const char base64[] =
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+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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+ const char *ptr = str.data;
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+ const char *end = ptr + str.size;
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+ char buf[4];
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+
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+ jsonenc_putstr(e, "\"");
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+
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+ while (end - ptr >= 3) {
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+ buf[0] = base64[ptr[0] >> 2];
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+ buf[1] = base64[((ptr[0] & 0x3) << 4) | (ptr[1] >> 4)];
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+ buf[2] = base64[((ptr[1] & 0xf) << 2) | (ptr[2] >> 6)];
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+ buf[3] = base64[ptr[2] & 0x3f];
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+ jsonenc_putbytes(e, buf, 4);
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+ ptr += 3;
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+ }
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+
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+ switch (end - ptr) {
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+ case 2:
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+ buf[0] = base64[ptr[0] >> 2];
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+ buf[1] = base64[((ptr[0] & 0x3) << 4) | (ptr[1] >> 4)];
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+ buf[2] = base64[(ptr[1] & 0xf) << 2];
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+ buf[3] = '=';
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+ jsonenc_putbytes(e, buf, 4);
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+ break;
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+ case 1:
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+ buf[0] = base64[ptr[0] >> 2];
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+ buf[1] = base64[((ptr[0] & 0x3) << 4)];
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+ buf[2] = '=';
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+ buf[3] = '=';
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+ jsonenc_putbytes(e, buf, 4);
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+ break;
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+ }
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+
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+ jsonenc_putstr(e, "\"");
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+}
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+
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+static void jsonenc_stringbody(jsonenc *e, upb_strview str) {
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+ const char *ptr = str.data;
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+ const char *end = ptr + str.size;
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+
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+ while (ptr < end) {
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+ switch (*ptr) {
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+ case '\n':
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+ jsonenc_putstr(e, "\\n");
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+ break;
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+ case '\r':
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+ jsonenc_putstr(e, "\\r");
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+ break;
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+ case '\t':
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+ jsonenc_putstr(e, "\\t");
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+ break;
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+ case '\"':
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+ jsonenc_putstr(e, "\\\"");
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+ break;
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+ case '\f':
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+ jsonenc_putstr(e, "\f'");
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+ break;
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+ case '\b':
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+ jsonenc_putstr(e, "\b'");
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+ break;
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+ case '\\':
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+ jsonenc_putstr(e, "\\\\");
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+ break;
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+ default:
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+ if ((uint8_t)*ptr < 0x20) {
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+ jsonenc_printf(e, "\\u%04x", (int)(uint8_t)*ptr);
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+ } else {
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+ /* This could be a non-ASCII byte. We rely on the string being valid
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+ * UTF-8. */
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+ jsonenc_putbytes(e, ptr, 1);
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+ }
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+ break;
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+ }
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+ ptr++;
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+ }
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+}
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+
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+static void jsonenc_string(jsonenc *e, upb_strview str) {
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+ jsonenc_putstr(e, "\"");
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+ jsonenc_stringbody(e, str);
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+ jsonenc_putstr(e, "\"");
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+}
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+
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+static void jsonenc_double(jsonenc *e, const char *fmt, double val) {
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+ if (val == UPB_INFINITY) {
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+ jsonenc_putstr(e, "\"Infinity\"");
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+ } else if (val == -UPB_INFINITY) {
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+ jsonenc_putstr(e, "\"-Infinity\"");
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+ } else if (val != val) {
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+ jsonenc_putstr(e, "\"NaN\"");
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+ } else {
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+ jsonenc_printf(e, fmt, val);
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+ }
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+}
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+
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+static void jsonenc_wrapper(jsonenc *e, const upb_msg *msg,
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+ const upb_msgdef *m) {
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+ const upb_fielddef *val_f = upb_msgdef_itof(m, 1);
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+ upb_msgval val = upb_msg_get(m, val_f);
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+ jsonenc_scalar(e, val, val_f);
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+}
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+
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+const upb_msgdef *jsonenc_getanymsg(jsonenc *e, upb_strview type_url) {
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+ /* Find last '/', if any. */
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+ const char *end = type_url.data + type_url.size;
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+ const char *ptr = end;
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+
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+ if (!e->ext_pool || type_url.size == 0) return NULL;
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+
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+ while (true) {
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+ if (--ptr == type_url.data) {
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+ /* Type URL must contain at least one '/', with host before. */
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+ return NULL;
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+ }
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+ if (*ptr == '/') {
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+ ptr++;
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+ break;
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+ }
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+ }
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+
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+ return upb_symtab_lookupmsg2(e->ext_pool, ptr, end - ptr);
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+}
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+
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+static void jsonenc_any(jsonenc *e, const upb_msg *msg, const upb_msgdef *m) {
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+ const upb_fielddef *type_url_f = upb_msgdef_itof(m, 1);
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+ const upb_fielddef *value_f = upb_msgdef_itof(m, 1);
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+ upb_strview type_url = upb_msg_get(msg, type_url_f).str_val;
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+ upb_strview value = upb_msg_get(msg, value_f).str_val;
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+ const upb_msgdef *any_m = jsonenc_getanymsg(e, type_url);
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+ const upb_msglayout *any_layout = upb_msgdef_layout(any_m);
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+ upb_msg *any = upb_msg_new(any_m, e->arena);
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+
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+ if (!upb_decode(value.data, value.size, any, any_layout, e->arena)) {
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+ jsonenc_err(e, "Error decoding message in Any");
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+ }
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+
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+ jsonenc_putstr(e, "{\"@type\": ");
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+ jsonenc_string(e, type_url);
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+ jsonenc_putstr(e, ", ");
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+
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+ if (upb_msgdef_wellknowntype(m) == UPB_WELLKNOWN_UNSPECIFIED) {
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+ /* Regular messages: {"@type": "...", "foo": 1, "bar": 2} */
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+ jsonenc_msg(e, any, any_m);
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+ } else {
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+ /* Well-known type: {"@type": "...", "value": <well-known encoding>} */
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+ jsonenc_putstr(e, "value: ");
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+ jsonenc_msgfield(e, any, any_m);
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+ }
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+
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+ jsonenc_putstr(e, "}");
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+}
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+
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+static void jsonenc_putsep(jsonenc *e, const char *str, bool *first) {
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+ if (*first) {
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+ *first = false;
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+ } else {
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+ jsonenc_putstr(e, str);
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+ }
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+}
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+
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+static void jsonenc_fieldpath(jsonenc *e, upb_strview path) {
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+ const char *ptr = path.data;
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+ const char *end = ptr + path.size;
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+
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+ while (ptr < end) {
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+ char ch = *ptr;
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+ if (ch >= 'A' && ch <= 'Z') {
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+ jsonenc_err(e, "Field mask element may not have upper-case letter.");
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+ } else if (ch == '_') {
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+ if (ptr == end - 1 || *(ptr + 1) < 'a' || *(ptr + 1) > 'z') {
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+ jsonenc_err(e, "Underscore must be followed by a lowercase letter.");
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+ }
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+ } else {
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+ jsonenc_putbytes(e, &ch, 1);
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+ }
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+ ptr++;
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+ }
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+}
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+
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+static void jsonenc_fieldmask(jsonenc *e, const upb_msg *msg,
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+ const upb_msgdef *m) {
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+ const upb_fielddef *paths_f = upb_msgdef_itof(m, 1);
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+ const upb_array *paths = upb_msg_get(msg, paths_f).array_val;
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+ bool first = true;
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+ size_t i, n = 0;
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+
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+ if (paths) n = upb_array_size(paths);
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+
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+ jsonenc_putstr(e, "\"");
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+
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+ for (i = 0; i < n; i++) {
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+ jsonenc_putsep(e, ",", &first);
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+ jsonenc_fieldpath(e, upb_array_get(paths, i).str_val);
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+ }
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+
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+ jsonenc_putstr(e, "\"");
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+}
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+
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+static void jsonenc_struct(jsonenc *e, const upb_msg *msg,
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+ const upb_msgdef *m) {
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+ const upb_fielddef *fields_f = upb_msgdef_itof(m, 1);
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+ const upb_map *fields = upb_msg_get(msg, fields_f).map_val;
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+ const upb_msgdef *entry_m = upb_fielddef_msgsubdef(fields_f);
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+ const upb_fielddef *value_f = upb_msgdef_itof(entry_m, 2);
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+ size_t iter = UPB_MAP_BEGIN;
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+ bool first = true;
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+
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+ jsonenc_putstr(e, "{");
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+
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+ while (upb_mapiter_next(fields, &iter)) {
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+ upb_msgval key = upb_mapiter_key(fields, iter);
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+ upb_msgval val = upb_mapiter_value(fields, iter);
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+
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+ jsonenc_putsep(e, ", ", &first);
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+ jsonenc_string(e, key.str_val);
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+ jsonenc_putstr(e, ": ");
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|
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+ jsonenc_value(e, val.msg_val, upb_fielddef_msgsubdef(value_f));
|
|
|
+ }
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "}");
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_listvalue(jsonenc *e, const upb_msg *msg,
|
|
|
+ const upb_msgdef *m) {
|
|
|
+ const upb_fielddef *values_f = upb_msgdef_itof(m, 1);
|
|
|
+ const upb_msgdef *values_m = upb_fielddef_msgsubdef(values_f);
|
|
|
+ const upb_array *values = upb_msg_get(msg, values_f).array_val;
|
|
|
+ const size_t size = upb_array_size(values);
|
|
|
+ size_t i;
|
|
|
+ bool first = true;
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "[");
|
|
|
+
|
|
|
+ for (i = 0; i < size; i++) {
|
|
|
+ upb_msgval elem = upb_array_get(values, i);
|
|
|
+
|
|
|
+ jsonenc_putsep(e, ", ", &first);
|
|
|
+ jsonenc_value(e, elem.msg_val, values_m);
|
|
|
+ }
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "]");
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_value(jsonenc *e, const upb_msg *msg, const upb_msgdef *m) {
|
|
|
+ /* TODO(haberman): do we want a reflection method to get oneof case? */
|
|
|
+ size_t iter = UPB_MSG_BEGIN;
|
|
|
+ const upb_fielddef *f;
|
|
|
+ upb_msgval val;
|
|
|
+
|
|
|
+ if (!upb_msg_next(msg, m, NULL, &f, &val, &iter)) {
|
|
|
+ jsonenc_err(e, "No value set in Value proto");
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (upb_fielddef_number(f)) {
|
|
|
+ case 1:
|
|
|
+ jsonenc_putstr(e, "null");
|
|
|
+ break;
|
|
|
+ case 2:
|
|
|
+ jsonenc_double(e, "%.17g", val.double_val);
|
|
|
+ break;
|
|
|
+ case 3:
|
|
|
+ jsonenc_string(e, val.str_val);
|
|
|
+ break;
|
|
|
+ case 4:
|
|
|
+ jsonenc_putstr(e, val.bool_val ? "true" : "false");
|
|
|
+ break;
|
|
|
+ case 5:
|
|
|
+ jsonenc_struct(e, val.msg_val, upb_fielddef_msgsubdef(f));
|
|
|
+ break;
|
|
|
+ case 6:
|
|
|
+ jsonenc_listvalue(e, val.msg_val, upb_fielddef_msgsubdef(f));
|
|
|
+ break;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_msgfield(jsonenc *e, const upb_msg *msg,
|
|
|
+ const upb_msgdef *m) {
|
|
|
+ switch (upb_msgdef_wellknowntype(m)) {
|
|
|
+ case UPB_WELLKNOWN_UNSPECIFIED:
|
|
|
+ jsonenc_msg(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_ANY:
|
|
|
+ jsonenc_any(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_FIELDMASK:
|
|
|
+ jsonenc_fieldmask(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_DURATION:
|
|
|
+ jsonenc_duration(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_TIMESTAMP:
|
|
|
+ jsonenc_timestamp(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_DOUBLEVALUE:
|
|
|
+ case UPB_WELLKNOWN_FLOATVALUE:
|
|
|
+ case UPB_WELLKNOWN_INT64VALUE:
|
|
|
+ case UPB_WELLKNOWN_UINT64VALUE:
|
|
|
+ case UPB_WELLKNOWN_INT32VALUE:
|
|
|
+ case UPB_WELLKNOWN_UINT32VALUE:
|
|
|
+ case UPB_WELLKNOWN_STRINGVALUE:
|
|
|
+ case UPB_WELLKNOWN_BYTESVALUE:
|
|
|
+ case UPB_WELLKNOWN_BOOLVALUE:
|
|
|
+ jsonenc_wrapper(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_VALUE:
|
|
|
+ jsonenc_value(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_LISTVALUE:
|
|
|
+ jsonenc_listvalue(e, msg, m);
|
|
|
+ break;
|
|
|
+ case UPB_WELLKNOWN_STRUCT:
|
|
|
+ jsonenc_listvalue(e, msg, m);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_scalar(jsonenc *e, upb_msgval val, const upb_fielddef *f) {
|
|
|
+ switch (upb_fielddef_type(f)) {
|
|
|
+ case UPB_TYPE_BOOL:
|
|
|
+ jsonenc_putstr(e, val.bool_val ? "true" : "false");
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_FLOAT:
|
|
|
+ jsonenc_double(e, "%.9g", val.float_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_DOUBLE:
|
|
|
+ jsonenc_double(e, "%.17g", val.double_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_INT32:
|
|
|
+ jsonenc_printf(e, "%" PRId32, val.int32_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_UINT32:
|
|
|
+ jsonenc_printf(e, "%" PRIu32, val.uint32_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_INT64:
|
|
|
+ jsonenc_printf(e, "\"%" PRId64 "\"", val.int64_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_UINT64:
|
|
|
+ jsonenc_printf(e, "\"%" PRIu64 "\"", val.uint64_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_STRING:
|
|
|
+ jsonenc_string(e, val.str_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_BYTES:
|
|
|
+ jsonenc_bytes(e, val.str_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_ENUM:
|
|
|
+ jsonenc_enum(val.int32_val, f, e);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_MESSAGE:
|
|
|
+ jsonenc_msgfield(e, val.msg_val, upb_fielddef_msgsubdef(f));
|
|
|
+ break;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_mapkey(jsonenc *e, upb_msgval val, const upb_fielddef *f) {
|
|
|
+ jsonenc_putstr(e, "\"");
|
|
|
+
|
|
|
+ switch (upb_fielddef_type(f)) {
|
|
|
+ case UPB_TYPE_BOOL:
|
|
|
+ jsonenc_putstr(e, val.bool_val ? "true" : "false");
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_INT32:
|
|
|
+ jsonenc_printf(e, "%" PRId32, val.int32_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_UINT32:
|
|
|
+ jsonenc_printf(e, "%" PRIu32, val.uint32_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_INT64:
|
|
|
+ jsonenc_printf(e, "%" PRId64, val.int64_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_UINT64:
|
|
|
+ jsonenc_printf(e, "%" PRIu64, val.uint64_val);
|
|
|
+ break;
|
|
|
+ case UPB_TYPE_STRING:
|
|
|
+ jsonenc_stringbody(e, val.str_val);
|
|
|
+ default:
|
|
|
+ UPB_UNREACHABLE();
|
|
|
+ }
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "\": ");
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_array(jsonenc *e, const upb_array *arr,
|
|
|
+ const upb_fielddef *f) {
|
|
|
+ size_t i;
|
|
|
+ size_t size = upb_array_size(arr);
|
|
|
+ bool first = true;
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "[");
|
|
|
+
|
|
|
+ for (i = 0; i < size; i++) {
|
|
|
+ jsonenc_putsep(e, ", ", &first);
|
|
|
+ jsonenc_scalar(e, upb_array_get(arr, i), f);
|
|
|
+ }
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "]");
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_map(jsonenc *e, const upb_map *map, const upb_fielddef *f) {
|
|
|
+ const upb_msgdef *entry = upb_fielddef_msgsubdef(f);
|
|
|
+ const upb_fielddef *key_f = upb_msgdef_itof(entry, 1);
|
|
|
+ const upb_fielddef *val_f = upb_msgdef_itof(entry, 2);
|
|
|
+ size_t iter = UPB_MAP_BEGIN;
|
|
|
+ bool first = true;
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "{");
|
|
|
+
|
|
|
+ while (upb_mapiter_next(map, &iter)) {
|
|
|
+ jsonenc_putsep(e, ", ", &first);
|
|
|
+ jsonenc_mapkey(e, upb_mapiter_key(map, iter), key_f);
|
|
|
+ jsonenc_scalar(e, upb_mapiter_value(map, iter), val_f);
|
|
|
+ }
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "}");
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_fieldval(jsonenc *e, const upb_fielddef *f,
|
|
|
+ upb_msgval val, bool *first) {
|
|
|
+ char buf[128];
|
|
|
+ const char *name;
|
|
|
+
|
|
|
+ if (e->options & UPB_JSONENC_PROTONAMES) {
|
|
|
+ name = upb_fielddef_name(f);
|
|
|
+ } else {
|
|
|
+ /* TODO(haberman): we need a better JSON name API. */
|
|
|
+ upb_fielddef_getjsonname(f, buf, sizeof(buf));
|
|
|
+ name = buf;
|
|
|
+ }
|
|
|
+
|
|
|
+ jsonenc_putsep(e, ", ", first);
|
|
|
+ jsonenc_printf(e, "\"%s\": ", name);
|
|
|
+
|
|
|
+ if (upb_fielddef_ismap(f)) {
|
|
|
+ jsonenc_map(e, val.map_val, f);
|
|
|
+ } else if (upb_fielddef_isseq(f)) {
|
|
|
+ jsonenc_array(e, val.array_val, f);
|
|
|
+ } else {
|
|
|
+ jsonenc_scalar(e, val, f);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void jsonenc_msg(jsonenc *e, const upb_msg *msg, const upb_msgdef *m) {
|
|
|
+ upb_msgval val;
|
|
|
+ const upb_fielddef *f;
|
|
|
+ bool first = true;
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "{");
|
|
|
+
|
|
|
+ if (e->options & UPB_JSONENC_EMITDEFAULTS) {
|
|
|
+ /* Iterate over all fields. */
|
|
|
+ upb_msg_field_iter i;
|
|
|
+ for (upb_msg_field_begin(&i, m); !upb_msg_field_done(&i);
|
|
|
+ upb_msg_field_next(&i)) {
|
|
|
+ f = upb_msg_iter_field(&i);
|
|
|
+ jsonenc_fieldval(e, f, upb_msg_get(msg, f), &first);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ /* Iterate over non-empty fields. */
|
|
|
+ size_t iter = UPB_MSG_BEGIN;
|
|
|
+ while (upb_msg_next(msg, m, e->ext_pool, &f, &val, &iter)) {
|
|
|
+ jsonenc_fieldval(e, f, val, &first);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ jsonenc_putstr(e, "}");
|
|
|
+}
|
|
|
+
|
|
|
+size_t jsonenc_nullz(jsonenc *e, size_t size) {
|
|
|
+ size_t ret = e->ptr - e->buf + e->overflow;
|
|
|
+
|
|
|
+ if (size > 0) {
|
|
|
+ if (e->ptr == e->end) e->ptr--;
|
|
|
+ *e->ptr = '\0';
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+size_t upb_json_encode(const upb_msg *msg, const upb_msgdef *m,
|
|
|
+ const upb_symtab *ext_pool, int options, char *buf,
|
|
|
+ size_t size, upb_status *status) {
|
|
|
+ jsonenc e;
|
|
|
+
|
|
|
+ e.buf = buf;
|
|
|
+ e.ptr = buf;
|
|
|
+ e.end = buf + size;
|
|
|
+ e.overflow = 0;
|
|
|
+ e.options = options;
|
|
|
+ e.ext_pool = ext_pool;
|
|
|
+ e.status = status;
|
|
|
+
|
|
|
+ if (setjmp(e.err)) return -1;
|
|
|
+
|
|
|
+ jsonenc_msg(&e, msg, m);
|
|
|
+ return jsonenc_nullz(&e, size);
|
|
|
+}
|
Mark D. Roth