env/rabbitmq-c/examples/utils.c

// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors.
// SPDX-License-Identifier: mit

#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <rabbitmq-c/amqp.h>
#include <rabbitmq-c/framing.h>
#include <stdint.h>

#include "utils.h"

void die(const char *fmt, ...) {
  va_list ap;
  va_start(ap, fmt);
  vfprintf(stderr, fmt, ap);
  va_end(ap);
  fprintf(stderr, "\n");
  exit(1);
}

void die_on_error(int x, char const *context) {
  if (x < 0) {
    fprintf(stderr, "%s: %s\n", context, amqp_error_string2(x));
    exit(1);
  }
}

void die_on_amqp_error(amqp_rpc_reply_t x, char const *context) {
  switch (x.reply_type) {
    case AMQP_RESPONSE_NORMAL:
      return;

    case AMQP_RESPONSE_NONE:
      fprintf(stderr, "%s: missing RPC reply type!\n", context);
      break;

    case AMQP_RESPONSE_LIBRARY_EXCEPTION:
      fprintf(stderr, "%s: %s\n", context, amqp_error_string2(x.library_error));
      break;

    case AMQP_RESPONSE_SERVER_EXCEPTION:
      switch (x.reply.id) {
        case AMQP_CONNECTION_CLOSE_METHOD: {
          amqp_connection_close_t *m =
              (amqp_connection_close_t *)x.reply.decoded;
          fprintf(stderr, "%s: server connection error %uh, message: %.*s\n",
                  context, m->reply_code, (int)m->reply_text.len,
                  (char *)m->reply_text.bytes);
          break;
        }
        case AMQP_CHANNEL_CLOSE_METHOD: {
          amqp_channel_close_t *m = (amqp_channel_close_t *)x.reply.decoded;
          fprintf(stderr, "%s: server channel error %uh, message: %.*s\n",
                  context, m->reply_code, (int)m->reply_text.len,
                  (char *)m->reply_text.bytes);
          break;
        }
        default:
          fprintf(stderr, "%s: unknown server error, method id 0x%08X\n",
                  context, x.reply.id);
          break;
      }
      break;
  }

  exit(1);
}

static void dump_row(long count, int numinrow, int *chs) {
  int i;

  printf("%08lX:", count - numinrow);

  if (numinrow > 0) {
    for (i = 0; i < numinrow; i++) {
      if (i == 8) {
        printf(" :");
      }
      printf(" %02X", chs[i]);
    }
    for (i = numinrow; i < 16; i++) {
      if (i == 8) {
        printf(" :");
      }
      printf("   ");
    }
    printf("  ");
    for (i = 0; i < numinrow; i++) {
      if (isprint(chs[i])) {
        printf("%c", chs[i]);
      } else {
        printf(".");
      }
    }
  }
  printf("\n");
}

static int rows_eq(int *a, int *b) {
  int i;

  for (i = 0; i < 16; i++)
    if (a[i] != b[i]) {
      return 0;
    }

  return 1;
}

void amqp_dump(void const *buffer, size_t len) {
  unsigned char *buf = (unsigned char *)buffer;
  long count = 0;
  int numinrow = 0;
  int chs[16];
  int oldchs[16] = {0};
  int showed_dots = 0;
  size_t i;

  for (i = 0; i < len; i++) {
    int ch = buf[i];

    if (numinrow == 16) {
      int j;

      if (rows_eq(oldchs, chs)) {
        if (!showed_dots) {
          showed_dots = 1;
          printf(
              "          .. .. .. .. .. .. .. .. : .. .. .. .. .. .. .. ..\n");
        }
      } else {
        showed_dots = 0;
        dump_row(count, numinrow, chs);
      }

      for (j = 0; j < 16; j++) {
        oldchs[j] = chs[j];
      }

      numinrow = 0;
    }

    count++;
    chs[numinrow++] = ch;
  }

  dump_row(count, numinrow, chs);

  if (numinrow != 0) {
    printf("%08lX:\n", count);
  }
}