/*
 * Copyright 2001-2004 Brandon Long
 * All Rights Reserved.
 *
 * ClearSilver Templating System
 *
 * This code is made available under the terms of the ClearSilver License.
 * http://www.clearsilver.net/license.hdf
 *
 */

#include "cs_config.h"

#include <time.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/time.h>
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
#include "neo_misc.h"
#include "neo_err.h"

static int LogLevel = NE_LOG_WARN;
static int LogDisplayOptions = NE_LOG_DISPLAY_DATETIME;

void ne_set_log (int level)
{
  LogLevel = level;
}

void ne_set_log_options(int display_options)
{
  LogDisplayOptions = display_options;
}

void ne_vlogf(const char *func, const char *file, int lineno, int level,
              const char *fmt, va_list ap)
{
  NEOERR *err;
  char buf[1024];
  char prefix_buf[1024] = "";
  STRING prefix;
  int len;

  /* Used a fixed size buffer */
  neo_string_init(&prefix);
  prefix.buf = prefix_buf;
  prefix.fixed = 1;
  prefix.max = sizeof(prefix_buf);

  if (LogLevel < level) return;

  if (LogDisplayOptions)
  {
    int prefix_started = 0;

    err = neo_string_append_char(&prefix, '[');
    if (err) nerr_ignore(&err);

    if (LogDisplayOptions & NE_LOG_DISPLAY_DATETIME)
    {
      char tbuf[20];
      struct tm my_tm;
      time_t now = time(NULL);

      localtime_r(&now, &my_tm);

      strftime(tbuf, sizeof(tbuf), "%m/%d %H:%M:%S", &my_tm);
      err = neo_string_append(&prefix, tbuf);
      if (err) nerr_ignore(&err);
      prefix_started = 1;
    }
    if (LogDisplayOptions & NE_LOG_DISPLAY_PID)
    {
      err = neo_string_appendf(&prefix, "%s{%d}", prefix_started ? " " : "",
               getpid());
      if (err) nerr_ignore(&err);
      prefix_started = 1;
    }
    if (LogDisplayOptions & NE_LOG_DISPLAY_FUNCTION)
    {
      if (prefix_started) {
        err = neo_string_append_char(&prefix, ' ');
        if (err) nerr_ignore(&err);
      }
      err = neo_string_append(&prefix, func);
      if (err) nerr_ignore(&err);
      prefix_started = 1;
    }
    if (LogDisplayOptions & NE_LOG_DISPLAY_FILELINE)
    {
      err = neo_string_appendf(&prefix, "%s%s:%d", prefix_started ? " " : "",
                           file,
                           lineno);
      if (err) nerr_ignore(&err);
      prefix_started = 1;
    }
    err = neo_string_appendn(&prefix, "] ", 2);
    if (err) nerr_ignore(&err);
  }

  /* Remove ending whitespace */
  vsnprintf (buf, sizeof(buf), fmt, ap);
  len = strlen(buf);
  while (len && isspace (buf[len-1])) buf[--len] = '\0';

  fprintf (stderr, "%s%s\n", prefix.buf, buf);
}

void ne_logf(const char *func, const char *file, int lineno, int level,
             const char *fmt, ...)
{
  va_list ap;

  va_start (ap, fmt);
  ne_vlogf(func, file, lineno, level, fmt, ap);
  va_end (ap);
}

UINT32 python_string_hash (const char *s)
{
  int len=0;
  register UINT32 x;

  x = *s << 7;
  while(*s != 0) {
    x = (1000003*x) ^ *s;
    s++;
    len++;
  }
  x ^= len;
  if(x == -1) x = -2;
  return x;
}

UINT8 *ne_stream4 (UINT8  *dest, UINT32 num)
{
  dest[0] = num & 0xFF;
  dest[1] = (num >> 8) & 0xFF;
  dest[2] = (num >> 16) & 0xFF;
  dest[3] = (num >> 24) & 0xFF;

  return dest + 4;
}

UINT8 *ne_stream2 (UINT8  *dest, UINT16 num)
{
  dest[0] = num & 0xFF;
  dest[1] = (num >> 8) & 0xFF;

  return dest + 2;
}

UINT8 *ne_unstream4 (UINT32 *pnum, UINT8 *src)
{
  *pnum = src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24);

  return src + 4;
}

UINT8 *ne_unstream2 (UINT16 *pnum, UINT8 *src)
{
  *pnum = src[0] | (src[1] << 8);

  return src + 2;
}

/* This handles strings of less than 256 bytes */
UINT8 *ne_unstream_str (char *s, int l, UINT8 *src)
{
  UINT8 sl;

  sl = src[0];
  if (sl > l)
    sl = l;
  memcpy (s, src+1, sl);
  s[l-1] = '\0';
  return src+sl+1;
}

UINT8 *ne_stream_str (UINT8 *dest, const char *s, int l)
{
  if (l > 255)
  {
    ne_warn("WARNING: calling ne_stream_str with l>255");
    l = 255;
  }
  dest[0] = l;
  memcpy (dest+1, s, l);
  return dest+l+1;
}

#ifndef HAVE_GETTIMEOFDAY

/* Ok, if we don't have gettimeofday, they only get second resolution */
double ne_timef (void) {
  return time(NULL);
}

#else 

double ne_timef (void)
{
  double f = 0;
  struct timeval tv;
  int ret;

  ret = gettimeofday(&tv, NULL);
  if (ret == 0)
  {
    f = tv.tv_sec + (tv.tv_usec / 1000000.0);
  }
  return f;
}
#endif

static const UINT32 CRCTable[256] = {
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};

UINT32 ne_crc (UINT8 *data, UINT32 bytes) 
{
  UINT32 crc, i;

  crc = (UINT32)-1;

  for(i = 0; i < bytes; i++, data++)
    crc = ((crc >> 8) & 0xFFFFFF) ^ CRCTable[((crc ^ *data) & 0xFF)];

  crc = ~crc;

  return crc;
}
