12
12
You should have received a copy of the GNU General Public License
13
13
along with this program; if not, write to the Free Software
14
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
14
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
16
16
/* readline for batch mode */
19
#include "drizzled/internal/my_sys.h"
20
#include "client/linebuffer.h"
21
#include <boost/version.hpp>
18
#include <drizzled/global.h>
19
#include <mysys/my_sys.h>
20
#include <mystrings/m_string.h>
21
#include "my_readline.h"
25
23
using namespace std;
26
using namespace drizzled;
28
LineBuffer::LineBuffer(uint32_t my_max_size,FILE *my_file)
36
if here beacuse the old way of using file_descriptor is deprecated in boost
37
1.44. There is a #define to re-enable the function but this is broken in
38
Fedora 14. See https://bugzilla.redhat.com/show_bug.cgi?id=654480
40
#if BOOST_VERSION < 104400
41
file_stream = new boost::iostreams::stream<boost::iostreams::file_descriptor>(fileno(my_file), true);
43
file_stream = new boost::iostreams::stream<boost::iostreams::file_descriptor>(fileno(my_file), boost::iostreams::never_close_handle);
46
file_stream = new std::stringstream;
47
line.reserve(max_size);
50
void LineBuffer::addString(const string &str)
52
(*file_stream) << str << endl;
55
char *LineBuffer::readline()
57
file_stream->getline(&line[0], max_size);
59
if (file_stream->fail())
25
static bool init_line_buffer(LINE_BUFFER *buffer,File file,uint32_t size,
27
static bool init_line_buffer_from_string(LINE_BUFFER *buffer,char * str);
28
static size_t fill_buffer(LINE_BUFFER *buffer);
29
static char *intern_read_line(LINE_BUFFER *buffer,uint32_t *out_length);
32
LINE_BUFFER *batch_readline_init(uint32_t max_size,FILE *file)
34
LINE_BUFFER *line_buff;
35
if (!(line_buff=(LINE_BUFFER*) malloc(sizeof(*line_buff))))
37
memset(line_buff, 0, sizeof(*line_buff));
38
if (init_line_buffer(line_buff,fileno(file),IO_SIZE,max_size))
47
char *batch_readline(LINE_BUFFER *line_buff)
52
if (!(pos=intern_read_line(line_buff,&out_length)))
54
if (out_length && pos[out_length-1] == '\n')
55
if (--out_length && pos[out_length-1] == '\r') /* Remove '\n' */
56
out_length--; /* Remove '\r' */
57
line_buff->read_length=out_length;
63
void batch_readline_end(LINE_BUFFER *line_buff)
67
free(line_buff->buffer);
73
LINE_BUFFER *batch_readline_command(LINE_BUFFER *line_buff, char * str)
77
if (!(line_buff=(LINE_BUFFER*) malloc(sizeof(*line_buff))))
79
memset(line_buff, 0, sizeof(*line_buff));
81
if (init_line_buffer_from_string(line_buff,str))
90
/*****************************************************************************
91
Functions to handle buffered readings of lines from a stream
92
******************************************************************************/
95
init_line_buffer(LINE_BUFFER *buffer,File file,uint32_t size,uint32_t max_buffer)
99
buffer->max_size=max_buffer;
100
if (!(buffer->buffer = (char*) malloc(buffer->bufread+1)))
102
buffer->end_of_line=buffer->end=buffer->buffer;
103
buffer->buffer[0]=0; /* For easy start test */
108
init_line_buffer_from_string can be called on the same buffer
109
several times. the resulting buffer will contain a
110
concatenation of all strings separated by spaces
112
static bool init_line_buffer_from_string(LINE_BUFFER *buffer,char * str)
114
uint old_length=(uint)(buffer->end - buffer->buffer);
115
uint length= (uint) strlen(str);
116
char * tmpptr= (char*)realloc(buffer->buffer, old_length+length+2);
120
buffer->buffer= buffer->start_of_line= buffer->end_of_line= tmpptr;
121
buffer->end= buffer->buffer + old_length;
124
memcpy(buffer->end, str, length);
125
buffer->end[length]= '\n';
126
buffer->end[length+1]= 0;
127
buffer->end+= length+1;
135
Fill the buffer retaining the last n bytes at the beginning of the
136
newly filled buffer (for backward context). Returns the number of new
137
bytes read from disk.
140
static size_t fill_buffer(LINE_BUFFER *buffer)
143
uint bufbytes= (uint) (buffer->end - buffer->start_of_line);
146
return 0; /* Everything read */
148
/* See if we need to grow the buffer. */
152
uint start_offset=(uint) (buffer->start_of_line - buffer->buffer);
153
read_count=(buffer->bufread - bufbytes)/IO_SIZE;
154
if ((read_count*=IO_SIZE))
156
buffer->bufread *= 2;
157
if (!(buffer->buffer = (char*) realloc(buffer->buffer,
160
buffer->start_of_line=buffer->buffer+start_offset;
161
buffer->end=buffer->buffer+bufbytes;
164
/* Shift stuff down. */
165
if (buffer->start_of_line != buffer->buffer)
167
memmove(buffer->buffer, buffer->start_of_line, (uint) bufbytes);
168
buffer->end=buffer->buffer+bufbytes;
171
/* Read in new stuff. */
172
if ((read_count= my_read(buffer->file, (unsigned char*) buffer->end, read_count,
173
MYF(MY_WME))) == MY_FILE_ERROR)
176
/* Kludge to pretend every nonempty file ends with a newline. */
177
if (!read_count && bufbytes && buffer->end[-1] != '\n')
179
buffer->eof = read_count = 1;
182
buffer->end_of_line=(buffer->start_of_line=buffer->buffer)+bufbytes;
183
buffer->end+=read_count;
184
*buffer->end=0; /* Sentinel */
190
char *intern_read_line(LINE_BUFFER *buffer,uint32_t *out_length)
196
buffer->start_of_line=buffer->end_of_line;
199
pos=buffer->end_of_line;
200
while (*pos != '\n' && *pos)
202
if (pos == buffer->end)
204
if ((uint) (pos - buffer->start_of_line) < buffer->max_size)
206
if (!(length=fill_buffer(buffer)) || length == (size_t) -1)
210
pos--; /* break line here */
212
buffer->end_of_line=pos+1;
213
*out_length=(uint32_t) (pos + 1 - buffer->eof - buffer->start_of_line);
214
return(buffer->start_of_line);