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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2009 Google Inc. See LICENSE for details.
* Author: Josh Haberman <jhaberman@gmail.com>
*/
#include <errno.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "upb/descriptor_const.h"
#include "upb/upb.h"
#include "upb/bytestream.h"
#define alignof(t) offsetof(struct { char c; t x; }, x)
#define TYPE_INFO(wire_type, ctype, inmemory_type, is_numeric) \
{alignof(ctype), sizeof(ctype), wire_type, UPB_TYPE(inmemory_type), \
#ctype, is_numeric},
const upb_type_info upb_types[] = {
// END_GROUP is not real, but used to signify the pseudo-field that
// ends a group from within the group.
TYPE_INFO(UPB_WIRE_TYPE_END_GROUP, void*, MESSAGE, false) // ENDGROUP
TYPE_INFO(UPB_WIRE_TYPE_64BIT, double, DOUBLE, true) // DOUBLE
TYPE_INFO(UPB_WIRE_TYPE_32BIT, float, FLOAT, true) // FLOAT
TYPE_INFO(UPB_WIRE_TYPE_VARINT, int64_t, INT64, true) // INT64
TYPE_INFO(UPB_WIRE_TYPE_VARINT, uint64_t, UINT64, true) // UINT64
TYPE_INFO(UPB_WIRE_TYPE_VARINT, int32_t, INT32, true) // INT32
TYPE_INFO(UPB_WIRE_TYPE_64BIT, uint64_t, UINT64, true) // FIXED64
TYPE_INFO(UPB_WIRE_TYPE_32BIT, uint32_t, UINT32, true) // FIXED32
TYPE_INFO(UPB_WIRE_TYPE_VARINT, bool, BOOL, true) // BOOL
TYPE_INFO(UPB_WIRE_TYPE_DELIMITED, void*, STRING, false) // STRING
TYPE_INFO(UPB_WIRE_TYPE_START_GROUP, void*, MESSAGE, false) // GROUP
TYPE_INFO(UPB_WIRE_TYPE_DELIMITED, void*, MESSAGE, false) // MESSAGE
TYPE_INFO(UPB_WIRE_TYPE_DELIMITED, void*, STRING, false) // BYTES
TYPE_INFO(UPB_WIRE_TYPE_VARINT, uint32_t, UINT32, true) // UINT32
TYPE_INFO(UPB_WIRE_TYPE_VARINT, uint32_t, INT32, true) // ENUM
TYPE_INFO(UPB_WIRE_TYPE_32BIT, int32_t, INT32, true) // SFIXED32
TYPE_INFO(UPB_WIRE_TYPE_64BIT, int64_t, INT64, true) // SFIXED64
TYPE_INFO(UPB_WIRE_TYPE_VARINT, int32_t, INT32, true) // SINT32
TYPE_INFO(UPB_WIRE_TYPE_VARINT, int64_t, INT64, true) // SINT64
};
#ifdef NDEBUG
upb_value UPB_NO_VALUE = {{0}};
#else
upb_value UPB_NO_VALUE = {{0}, -1};
#endif
void upb_status_init(upb_status *status) {
status->buf = NULL;
status->bufsize = 0;
upb_status_clear(status);
}
void upb_status_uninit(upb_status *status) {
free(status->buf);
}
void upb_status_seterrf(upb_status *s, const char *msg, ...) {
s->code = UPB_ERROR;
va_list args;
va_start(args, msg);
upb_vrprintf(&s->buf, &s->bufsize, 0, msg, args);
va_end(args);
s->str = s->buf;
}
void upb_status_seterrliteral(upb_status *status, const char *msg) {
status->error = true;
status->str = msg;
status->space = NULL;
}
void upb_status_copy(upb_status *to, const upb_status *from) {
to->error = from->error;
to->eof = from->eof;
to->code = from->code;
to->space = from->space;
if (from->str == from->buf) {
if (to->bufsize < from->bufsize) {
to->bufsize = from->bufsize;
to->buf = realloc(to->buf, to->bufsize);
}
memcpy(to->buf, from->buf, from->bufsize);
to->str = to->buf;
} else {
to->str = from->str;
}
}
const char *upb_status_getstr(const upb_status *_status) {
// Function is logically const but can modify internal state to materialize
// the string.
upb_status *status = (upb_status*)_status;
if (status->str == NULL && status->space) {
if (status->space->code_to_string) {
status->space->code_to_string(status->code, status->buf, status->bufsize);
status->str = status->buf;
} else {
upb_status_seterrf(status, "No message, error space=%s, code=%d\n",
status->space->name, status->code);
}
}
return status->str;
}
void upb_status_clear(upb_status *status) {
status->error = false;
status->eof = false;
status->code = 0;
status->space = NULL;
status->str = NULL;
}
void upb_status_setcode(upb_status *status, upb_errorspace *space, int code) {
status->code = code;
status->space = space;
status->str = NULL;
}
void upb_status_fromerrno(upb_status *status) {
if (errno != 0 && !upb_errno_is_wouldblock()) {
status->error = true;
upb_status_setcode(status, &upb_posix_errorspace, errno);
}
}
bool upb_errno_is_wouldblock() {
return
#ifdef EAGAIN
errno == EAGAIN ||
#endif
#ifdef EWOULDBLOCK
errno == EWOULDBLOCK ||
#endif
false;
}
bool upb_posix_codetostr(int code, char *buf, size_t len) {
if (strerror_r(code, buf, len) == -1) {
if (errno == EINVAL) {
int n = snprintf(buf, len, "Invalid POSIX error number %d\n", code);
return n >= (int)len;
} else if (errno == ERANGE) {
return false;
}
assert(false);
}
return true;
}
upb_errorspace upb_posix_errorspace = {"POSIX", &upb_posix_codetostr};
int upb_vrprintf(char **buf, size_t *size, size_t ofs,
const char *fmt, va_list args) {
// Try once without reallocating. We have to va_copy because we might have
// to call vsnprintf again.
uint32_t len = *size - ofs;
va_list args_copy;
va_copy(args_copy, args);
uint32_t true_len = vsnprintf(*buf + ofs, len, fmt, args_copy);
va_end(args_copy);
// Resize to be the correct size.
if (true_len >= len) {
// Need to print again, because some characters were truncated. vsnprintf
// will not write the entire string unless you give it space to store the
// NULL terminator also.
*size = (ofs + true_len + 1);
char *newbuf = realloc(*buf, *size);
if (!newbuf) return -1;
vsnprintf(newbuf + ofs, true_len + 1, fmt, args);
*buf = newbuf;
}
return true_len;
}
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