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#include "../src/cbor.h"
#include <sys/stat.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static uint8_t *readfile(const char *fname, size_t *size)
{
struct stat st;
FILE *f = fopen(fname, "rb");
if (!f)
return NULL;
if (fstat(fileno(f), &st) == -1)
return NULL;
uint8_t *buf = malloc(st.st_size);
if (buf == NULL)
return NULL;
*size = fread(buf, st.st_size, 1, f) == 1 ? st.st_size : 0;
fclose(f);
return buf;
}
static void indent(int nestingLevel)
{
while (nestingLevel--)
printf(" ");
}
static void dumpbytes(const uint8_t *buf, size_t len)
{
printf("\"");
while (len--)
printf("\\x%02X", *buf++);
printf("\"");
}
static CborError dumprecursive(CborValue *it, int nestingLevel)
{
while (!cbor_value_at_end(it)) {
CborError err;
CborType type = cbor_value_get_type(it);
indent(nestingLevel);
switch (type) {
case CborArrayType:
case CborMapType: {
// recursive type
CborValue recursed;
assert(cbor_value_is_container(it));
puts(type == CborArrayType ? "Array[" : "Map[");
err = cbor_value_enter_container(it, &recursed);
if (err)
return err; // parse error
err = dumprecursive(&recursed, nestingLevel + 1);
if (err)
return err; // parse error
err = cbor_value_leave_container(it, &recursed);
if (err)
return err; // parse error
indent(nestingLevel);
puts("]");
continue;
}
case CborIntegerType: {
int64_t val;
cbor_value_get_int64(it, &val); // can't fail
printf("%lld\n", (long long)val);
break;
}
case CborByteStringType: {
uint8_t *buf;
size_t n;
err = cbor_value_dup_byte_string(it, &buf, &n, it);
if (err)
return err; // parse error
dumpbytes(buf, n);
puts("");
free(buf);
continue;
}
case CborTextStringType: {
char *buf;
size_t n;
err = cbor_value_dup_text_string(it, &buf, &n, it);
if (err)
return err; // parse error
printf("\"%s\"\n", buf);
free(buf);
continue;
}
case CborTagType: {
CborTag tag;
cbor_value_get_tag(it, &tag); // can't fail
printf("Tag(%lld)\n", (long long)tag);
break;
}
case CborSimpleType: {
uint8_t type;
cbor_value_get_simple_type(it, &type); // can't fail
printf("simple(%u)\n", type);
break;
}
case CborNullType:
puts("null");
break;
case CborUndefinedType:
puts("undefined");
break;
case CborBooleanType: {
bool val;
cbor_value_get_boolean(it, &val); // can't fail
puts(val ? "true" : "false");
break;
}
case CborDoubleType: {
double val;
if (false) {
float f;
case CborFloatType:
cbor_value_get_float(it, &f);
val = f;
} else {
cbor_value_get_double(it, &val);
}
printf("%g\n", val);
break;
}
case CborHalfFloatType: {
uint16_t val;
cbor_value_get_half_float(it, &val);
printf("__f16(%04x)\n", val);
break;
}
case CborInvalidType:
assert(false); // can't happen
break;
}
err = cbor_value_advance_fixed(it);
if (err)
return err;
}
return CborNoError;
}
int main(int argc, char **argv)
{
if (argc != 2) {
puts("simplereader <filename>");
return 1;
}
size_t length;
uint8_t *buf = readfile(argv[1], &length);
if (!buf) {
perror("readfile");
return 1;
}
CborParser parser;
CborValue it;
CborError err = cbor_parser_init(buf, length, 0, &parser, &it);
if (!err)
err = dumprecursive(&it, 0);
free(buf);
if (err) {
fprintf(stderr, "CBOR parsing failure at offset %ld: %s\n",
it.ptr - buf, cbor_error_string(err));
return 1;
}
return 0;
}
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