sql/gstream.cc


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139

#include "mysql_priv.h"

int GTextReadStream::get_next_toc_type() const
{
  const char *cur = m_cur;
  while ((*cur)&&(strchr(" \t\r\n",*cur)))
  {
    cur++;
  }
  if (!(*cur))
  {
    return eostream;
  }

  if (((*cur>='a') && (*cur<='z')) || ((*cur>='A') && (*cur<='Z')) ||
      (*cur=='_'))
  {
    return word;
  }

  if (((*cur>='0') && (*cur<='9')) || (*cur=='-') || (*cur=='+') ||
      (*cur=='.'))
  {
    return numeric;
  }

  if (*cur == '(')
  {
    return l_bra;
  }
  
  if (*cur == ')')
  {
    return r_bra;
  }

  if (*cur == ',')
  {
    return comma;
  }

  return unknown;
}

const char *GTextReadStream::get_next_word(int *word_len)
{
  const char *cur = m_cur;
  while ((*cur)&&(strchr(" \t\r\n",*cur)))
  {
    cur++;
  }
  m_last_text_position = cur;

  if (!(*cur))
  {
    return 0;
  }

  const char *wd_start = cur;

  if (((*cur<'a') || (*cur>'z')) && ((*cur<'A') || (*cur>'Z')) && (*cur!='_'))
  {
    return NULL;
  }

  ++cur;

  while (((*cur>='a') && (*cur<='z')) || ((*cur>='A') && (*cur<='Z')) ||
	 (*cur=='_') || ((*cur>='0') && (*cur<='9')))
  {
    ++cur;
  }

  *word_len = cur - wd_start;

  m_cur = cur;

  return wd_start;
}

int GTextReadStream::get_next_number(double *d)
{
  const char *cur = m_cur;
  while ((*cur)&&(strchr(" \t\r\n",*cur)))
  {
    cur++;
  }

  m_last_text_position = cur;
  if (!(*cur))
  {
    set_error_msg("Numeric constant expected");
    return 1;
  }

  if (((*cur<'0') || (*cur>'9')) && (*cur!='-') && (*cur!='+') && (*cur!='.'))
  {
    set_error_msg("Numeric constant expected");
    return 1;
  }

  char *endptr;

  *d = my_strtod(cur, &endptr);

  if (endptr)
  {
    m_cur = endptr;
  }

  return 0;
}

char GTextReadStream::get_next_symbol()
{
  const char *cur = m_cur;
  while ((*cur)&&(strchr(" \t\r\n",*cur)))
  {
    cur++;
  }
  if (!(*cur))
  {
    return 0;
  }

  m_cur = cur + 1;
  m_last_text_position = cur;

  return *cur;
}

void GTextReadStream::set_error_msg(const char *msg)
{
  size_t len = strlen(msg);
  m_err_msg = (char *)my_realloc(m_err_msg, len + 1, MYF(MY_ALLOW_ZERO_PTR));
  memcpy(m_err_msg, msg, len + 1);
}