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build .pac in memory; prepare for further changes

This commit is contained in:
Heng Li 2011-10-25 10:27:13 -04:00
parent 7626595e3a
commit ca809a44d9
1 changed files with 17 additions and 18 deletions
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35
bntseq.c
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@ -163,7 +163,7 @@ void bns_destroy(bntseq_t *bns)
}
}
static void add1(const kseq_t *seq, bntseq_t *bns, FILE *fp, uint8_t *buf, int *l_buf, int *m_seqs, int *m_holes, bntamb1_t **q)
static uint8_t *add1(const kseq_t *seq, bntseq_t *bns, uint8_t *pac, int64_t *m_pac, int *m_seqs, int *m_holes, bntamb1_t **q)
{
bntann1_t *p;
int i, lasts;
@ -198,17 +198,17 @@ static void add1(const kseq_t *seq, bntseq_t *bns, FILE *fp, uint8_t *buf, int *
lasts = seq->seq.s[i];
{ // fill buffer
if (c >= 4) c = c>>4;
if (*l_buf == 0x40000) {
fwrite(buf, 1, 0x10000, fp);
memset(buf, 0, 0x10000);
*l_buf = 0;
if (bns->l_pac == *m_pac) { // double the pac size
*m_pac <<= 1;
pac = realloc(pac, *m_pac/4);
memset(pac + bns->l_pac/4, 0, (*m_pac - bns->l_pac)/4);
}
buf[*l_buf>>2] |= c << ((3 - (*l_buf&3)) << 1);
++(*l_buf);
pac[bns->l_pac>>2] |= c << ((3 - (bns->l_pac&3)) << 1);
++bns->l_pac;
}
}
++bns->n_seqs;
bns->l_pac += seq->seq.l;
return pac;
}
int64_t bns_fasta2bntseq(gzFile fp_fa, const char *prefix, int for_only)
@ -217,9 +217,9 @@ int64_t bns_fasta2bntseq(gzFile fp_fa, const char *prefix, int for_only)
kseq_t *seq;
char name[1024];
bntseq_t *bns;
unsigned char buf[0x10000];
int32_t i, l_buf, m_seqs, m_holes;
int64_t ret = -1;
uint8_t *pac = 0;
int32_t i, m_seqs, m_holes;
int64_t ret = -1, m_pac;
bntamb1_t *q;
FILE *fp;
@ -228,14 +228,13 @@ int64_t bns_fasta2bntseq(gzFile fp_fa, const char *prefix, int for_only)
bns = (bntseq_t*)calloc(1, sizeof(bntseq_t));
bns->seed = 11; // fixed seed for random generator
srand48(bns->seed);
m_seqs = m_holes = 8;
m_seqs = m_holes = 8; m_pac = 0x10000;
bns->anns = (bntann1_t*)calloc(m_seqs, sizeof(bntann1_t));
bns->ambs = (bntamb1_t*)calloc(m_holes, sizeof(bntamb1_t));
pac = calloc(m_pac/4, 1);
q = bns->ambs;
l_buf = 0;
strcpy(name, prefix); strcat(name, ".pac");
fp = xopen(name, "wb");
memset(buf, 0, 0x10000);
// read sequences
while (kseq_read(seq) >= 0) {
for (i = 0; i < seq->seq.l; ++i) { // convert to 2-bit encoding
@ -243,19 +242,18 @@ int64_t bns_fasta2bntseq(gzFile fp_fa, const char *prefix, int for_only)
if (seq->seq.s[i] > 3)
seq->seq.s[i] |= (lrand48()&3) << 4;
}
add1(seq, bns, fp, buf, &l_buf, &m_seqs, &m_holes, &q);
pac = add1(seq, bns, pac, &m_pac, &m_seqs, &m_holes, &q);
if (!for_only) {
seq_reverse(seq->seq.l, (uint8_t*)seq->seq.s, 0); // reversed but not complemented
for (i = 0; i < seq->seq.l; ++i) // complement
seq->seq.s[i] = seq->seq.s[i] < 4? 3 - seq->seq.s[i] : ((3 - (seq->seq.s[i]>>4)) << 4 | 4);
add1(seq, bns, fp, buf, &l_buf, &m_seqs, &m_holes, &q);
pac = add1(seq, bns, pac, &m_pac, &m_seqs, &m_holes, &q);
}
}
xassert(bns->l_pac, "zero length sequence.");
ret = bns->l_pac;
{ // finalize .pac file
ubyte_t ct;
fwrite(buf, 1, (l_buf>>2) + ((l_buf&3) == 0? 0 : 1), fp);
fwrite(pac, 1, (bns->l_pac>>2) + ((bns->l_pac&3) == 0? 0 : 1), fp);
// the following codes make the pac file size always (l_pac/4+1+1)
if (bns->l_pac % 4 == 0) {
ct = 0;
@ -269,6 +267,7 @@ int64_t bns_fasta2bntseq(gzFile fp_fa, const char *prefix, int for_only)
bns_dump(bns, prefix);
bns_destroy(bns);
kseq_destroy(seq);
free(pac);
return ret;
}