source code
/* The Computer Language Benchmarks Game
* http://benchmarksgame.alioth.debian.org/
*
* contributed by Bob W
*/
#include <stdio.h>
#include <stdlib.h>
#define JBFSIZE 82 // line input buffer size
#define QBFSIZE 5200 // output buffer initial size
#define Z16 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
#define V32 "\0TVGH\0\0CD\0\0M\0KN\0\0\0YSA\0BW\0R\0\0\0\0\0\0"
#define VALL Z16 Z16 Z16 Z16 V32 V32 Z16 Z16 Z16 Z16 Z16 Z16 Z16 Z16
int errex(char *s, int n) { // error message+value, return 1
fprintf(stderr,"\n*** Error: %s [%d]!\n", s, n);
return 1;
}
int main () { // ***** main *****
char *pj, *pq, *pr; // buffer pointers: inp,out,/out
char *jjj = malloc(JBFSIZE); // allocate input line buffer
char *qqq = malloc(QBFSIZE); // output buffer (dyn. size)
char *pqstop = qqq+QBFSIZE; // end-of-buffer pointer
char xtab[256] = VALL; // char conversion table
if (!jjj || !qqq)
return errex("Buffer allocation", !jjj + !qqq);
pj = fgets(jjj,JBFSIZE,stdin); // fetch 1st line
if (!pj)
return errex("No input data",0);
if (*jjj != '>')
return errex("1st char not '>'", 0);
while (pj) { // MAIN LOOP: process data
fputs(jjj, stdout); // output ID line
for (pq=qqq+1, pr=pqstop; ; pq++) { // LOOP: fill output buffer
pj = fgets(jjj, JBFSIZE, stdin); // get line from stdin
if (!pj || (*jjj=='>')) break; // EOF or new ID line
if (pr <= (pq+61)) { // need to resize buffer
char *newstop = pqstop + 12777888;
char *newptr = realloc(qqq, newstop-qqq);
if (!newptr)
return errex("Out of memory", 0);
if (newptr != qqq) { // new base: adj. pointers
size_t x = newptr-qqq; // offset for pointer update
pq+=x; pr+=x; qqq+=x;
newstop+=x; pqstop+=x;
}
pr = __builtin_memmove(newstop-(pqstop-pr), pr, pqstop-pr);
pqstop = newstop; // buffer resize complete
}
while (*pj) { // LOOP: conv. & revert line
char c = xtab[(unsigned char)(*pj++)];
if (c) // conversion valid
*(--pr) = c;
}
}
for (pq = qqq; pr<pqstop; ) { // LOOP: format output
size_t x = (pqstop-pr)<60 ? pqstop-pr : 60;
__builtin_memmove(pq,pr,x); // move line to free space
pr+=x; pq+=x; *(pq++) = 0xA; // adjust pointers, add LF
}
fwrite(qqq, 1, pq-qqq, stdout); // output converted data
}
return 0;
}