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63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
#include "e_linereader.h"
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void linereader_init(LINEREADER *lr, IOHANDLE io)
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{
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lr->buffer_max_size = 4*1024;
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lr->buffer_size = 0;
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lr->buffer_pos = 0;
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lr->io = io;
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}
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char *linereader_get(LINEREADER *lr)
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{
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unsigned line_start = lr->buffer_pos;
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while(1)
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{
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if(lr->buffer_pos >= lr->buffer_size)
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{
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/* fetch more */
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/* move the remaining part to the front */
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unsigned read;
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unsigned left = lr->buffer_size - line_start;
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if(line_start > lr->buffer_size)
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left = 0;
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if(left)
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mem_move(lr->buffer, &lr->buffer[line_start], left);
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lr->buffer_pos = left;
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/* fill the buffer */
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read = io_read(lr->io, &lr->buffer[lr->buffer_pos], lr->buffer_max_size-lr->buffer_pos);
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lr->buffer_size = left + read;
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line_start = 0;
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if(!read)
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{
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if(left)
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{
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lr->buffer[left] = 0; /* return the last line */
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lr->buffer_pos = left;
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lr->buffer_size = left;
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return lr->buffer;
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}
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else
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return 0x0; /* we are done! */
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}
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}
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else
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{
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if(lr->buffer[lr->buffer_pos] == '\n' || lr->buffer[lr->buffer_pos] == '\r')
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{
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/* line found */
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lr->buffer[lr->buffer_pos] = 0;
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lr->buffer_pos++;
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return &lr->buffer[line_start];
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}
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else
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lr->buffer_pos++;
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}
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}
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}
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