error.c

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/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
/*
 * standalone mini error implementation
 */
 
#include "config.h"
 
#include <ast/ast.h>
#include <ast/error.h>
#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <util/exit.h>
 
Error_info_t error_info;
 
void setErrorLine(int line) { error_info.line = line; }
void setErrorFileLine(char *src, int line) {
  error_info.file = src;
  error_info.line = line;
}
void setErrorId(char *id) { error_info.id = id; }
void setErrorErrors(int errors) { error_info.errors = errors; }
int getErrorErrors(void) { return error_info.errors; }
void setTraceLevel(int i) { error_info.trace = i; }
 
void errorv(const char *id, int level, const char *s, va_list ap) {
  int flags;
 
  if (level < error_info.trace)
    return;
  if (level < 0)
    flags = 0;
  else {
    flags = level & ~ERROR_LEVEL;
    level &= ERROR_LEVEL;
  }
  const char *prefix;
  if (level && ((prefix = error_info.id) || (prefix = id))) {
    if (flags & ERROR_USAGE)
      fprintf(stderr, "Usage: %s ", prefix);
    else
      fprintf(stderr, "%s: ", prefix);
  }
  if (flags & ERROR_USAGE)
    /*nop */;
  else if (level < 0) {
    int i;
    for (i = 0; i < error_info.indent; i++)
      fprintf(stderr, "  ");
    fprintf(stderr, "debug%d: ", level);
  } else if (level) {
    if (level == ERROR_WARNING) {
      fprintf(stderr, "warning: ");
      error_info.warnings++;
    } else {
      error_info.errors++;
      if (level == ERROR_PANIC)
        fprintf(stderr, "panic: ");
    }
    if (error_info.line) {
      if (error_info.file && *error_info.file)
        fprintf(stderr, "\"%s\", ", error_info.file);
      fprintf(stderr, "line %d: ", error_info.line);
    }
  }
  vfprintf(stderr, s, ap);
  fprintf(stderr, "\n");
  if (level >= ERROR_FATAL)
    graphviz_exit(level - ERROR_FATAL + 1);
}
 
void error(int level, const char *s, ...) {
  va_list ap;
 
  va_start(ap, s);
  errorv(NULL, level, s, ap);
  va_end(ap);
}
 
void errorf(const char *prefix, void *state, int level, const char *s, ...) {
  (void)state;
 
  va_list ap;
 
  va_start(ap, s);
  errorv(prefix, level, s, ap);
  va_end(ap);
}