1/*
2Redistribution and use in source and binary forms, with or without
3modification, are permitted provided that the following conditions are met:
4
5    * Redistributions of source code must retain the above copyright
6    notice, this list of conditions and the following disclaimer.
7
8    * Redistributions in binary form must reproduce the above copyright
9    notice, this list of conditions and the following disclaimer in the
10    documentation and/or other materials provided with the distribution.
11
12    * Neither the name of "The Computer Language Benchmarks Game" nor the
13    name of "The Computer Language Shootout Benchmarks" nor the names of
14    its contributors may be used to endorse or promote products derived
15    from this software without specific prior written permission.
16
17THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27POSSIBILITY OF SUCH DAMAGE.
28*/
29
30/*
31 * The Computer Language Benchmarks Game
32 * http://shootout.alioth.debian.org
33 *
34 * contributed by Bob W
35 */
36
37#include <stdio.h>
38#include <stdlib.h>
39
40#define JBFSIZE 82      // line input buffer size
41#define QBFSIZE 5200     // output buffer initial size
42#define Z16     "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
43#define V32     "\0TVGH\0\0CD\0\0M\0KN\0\0\0YSA\0BW\0R\0\0\0\0\0\0"
44#define VALL    Z16 Z16 Z16 Z16 V32 V32 Z16 Z16 Z16 Z16 Z16 Z16 Z16 Z16
45
46int errex(char *s, int n) {      // error message+value, return 1
47  fprintf(stderr,"\n*** Error: %s [%d]!\n", s, n);
48  return 1;
49}
50
51int main () {                    // ***** main *****
52  char *pj, *pq, *pr;            // buffer pointers: inp,out,/out
53  char *jjj = malloc(JBFSIZE);   // allocate input line buffer
54  char *qqq = malloc(QBFSIZE);   // output buffer (dyn. size)
55  char *pqstop = qqq+QBFSIZE;    // end-of-buffer pointer
56  char xtab[256] = VALL;         // char conversion table
57
58  if (!jjj || !qqq)
59    return errex("Buffer allocation", !jjj + !qqq);
60  pj = fgets(jjj,JBFSIZE,stdin);         // fetch 1st line
61  if (!pj)
62    return errex("No input data",0);
63  if (*jjj != '>')
64    return errex("1st char not '>'", 0);
65
66  while (pj) {                           // MAIN LOOP: process data
67    fputs(jjj, stdout);                  // output ID line
68
69    for (pq=qqq+1, pr=pqstop; ; pq++) {  // LOOP: fill output buffer
70      pj = fgets(jjj, JBFSIZE, stdin);   // get line from stdin
71      if (!pj || (*jjj=='>'))  break;    // EOF or new ID line
72      if (pr <= (pq+61)) {               // need to resize buffer
73        char *newstop = pqstop + 12777888;
74        char *newptr  = realloc(qqq, newstop-qqq);
75        if (!newptr)
76          return errex("Out of memory", 0);
77        if (newptr != qqq) {             // new base: adj. pointers
78          size_t x = newptr-qqq;         // offset for pointer update
79          pq+=x;  pr+=x;  qqq+=x;
80          newstop+=x;  pqstop+=x;
81        }
82        pr = __builtin_memmove(newstop-(pqstop-pr), pr, pqstop-pr);
83        pqstop = newstop;                // buffer resize complete
84      }
85      while (*pj) {                      // LOOP: conv. & revert line
86        char c = xtab[(unsigned char)(*pj++)];
87        if (c)                           // conversion valid
88          *(--pr) = c;
89      }
90    }
91
92    for (pq = qqq; pr<pqstop; ) {        // LOOP: format output
93      size_t x = (pqstop-pr)<60 ? pqstop-pr : 60;
94      __builtin_memmove(pq,pr,x);        // move line to free space
95      pr+=x;  pq+=x;  *(pq++) = 0xA;     // adjust pointers, add LF
96    }
97    fwrite(qqq, 1, pq-qqq, stdout);      // output converted data
98  }
99  return 0;
100}
101