--- /dev/null
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+#include "kstring.h"
+#include "bcf.h"
+
+bcf_t *bcf_open(const char *fn, const char *mode)
+{
+ bcf_t *b;
+ b = calloc(1, sizeof(bcf_t));
+ if (strchr(mode, 'w')) {
+ b->fp = strcmp(fn, "-")? bgzf_open(fn, mode) : bgzf_fdopen(fileno(stdout), mode);
+ } else {
+ b->fp = strcmp(fn, "-")? bgzf_open(fn, mode) : bgzf_fdopen(fileno(stdin), mode);
+ }
+ b->fp->owned_file = 1;
+ return b;
+}
+
+int bcf_close(bcf_t *b)
+{
+ int ret;
+ if (b == 0) return 0;
+ ret = bgzf_close(b->fp);
+ free(b);
+ return ret;
+}
+
+int bcf_hdr_write(bcf_t *b, const bcf_hdr_t *h)
+{
+ if (b == 0 || h == 0) return -1;
+ bgzf_write(b->fp, "BCF\4", 4);
+ bgzf_write(b->fp, &h->l_nm, 4);
+ bgzf_write(b->fp, h->name, h->l_nm);
+ bgzf_write(b->fp, &h->l_smpl, 4);
+ bgzf_write(b->fp, h->sname, h->l_smpl);
+ bgzf_write(b->fp, &h->l_txt, 4);
+ bgzf_write(b->fp, h->txt, h->l_txt);
+ bgzf_flush(b->fp);
+ return 16 + h->l_nm + h->l_smpl + h->l_txt;
+}
+
+bcf_hdr_t *bcf_hdr_read(bcf_t *b)
+{
+ uint8_t magic[4];
+ bcf_hdr_t *h;
+ if (b == 0) return 0;
+ h = calloc(1, sizeof(bcf_hdr_t));
+ bgzf_read(b->fp, magic, 4);
+ bgzf_read(b->fp, &h->l_nm, 4);
+ h->name = malloc(h->l_nm);
+ bgzf_read(b->fp, h->name, h->l_nm);
+ bgzf_read(b->fp, &h->l_smpl, 4);
+ h->sname = malloc(h->l_smpl);
+ bgzf_read(b->fp, h->sname, h->l_smpl);
+ bgzf_read(b->fp, &h->l_txt, 4);
+ h->txt = malloc(h->l_txt);
+ bgzf_read(b->fp, h->txt, h->l_txt);
+ bcf_hdr_sync(h);
+ return h;
+}
+
+void bcf_hdr_destroy(bcf_hdr_t *h)
+{
+ if (h == 0) return;
+ free(h->name); free(h->sname); free(h->txt); free(h->ns); free(h->sns);
+ free(h);
+}
+
+static inline char **cnt_null(int l, char *str, int *_n)
+{
+ int n = 0;
+ char *p, **list;
+ *_n = 0;
+ if (l == 0 || str == 0) return 0;
+ for (p = str; p != str + l; ++p)
+ if (*p == 0) ++n;
+ *_n = n;
+ list = calloc(n, sizeof(void*));
+ list[0] = str;
+ for (p = str, n = 1; p < str + l - 1; ++p)
+ if (*p == 0) list[n++] = p + 1;
+ return list;
+}
+
+int bcf_hdr_sync(bcf_hdr_t *b)
+{
+ if (b == 0) return -1;
+ if (b->ns) free(b->ns);
+ if (b->sns) free(b->sns);
+ if (b->l_nm) b->ns = cnt_null(b->l_nm, b->name, &b->n_ref);
+ else b->ns = 0, b->n_ref = 0;
+ b->sns = cnt_null(b->l_smpl, b->sname, &b->n_smpl);
+ return 0;
+}
+
+int bcf_sync(bcf1_t *b)
+{
+ char *p, *tmp[5];
+ int i, n, n_smpl = b->n_smpl;
+ ks_tokaux_t aux;
+ // set ref, alt, flt, info, fmt
+ b->ref = b->alt = b->flt = b->info = b->fmt = 0;
+ for (p = b->str, n = 0; p < b->str + b->l_str; ++p)
+ if (*p == 0 && p+1 != b->str + b->l_str) tmp[n++] = p + 1;
+ if (n != 5) {
+ fprintf(stderr, "[%s] incorrect number of fields (%d != 5). Corrupted file?\n", __func__, n);
+ return -1;
+ }
+ b->ref = tmp[0]; b->alt = tmp[1]; b->flt = tmp[2]; b->info = tmp[3]; b->fmt = tmp[4];
+ // set n_alleles
+ if (*b->alt == 0) b->n_alleles = 1;
+ else {
+ for (p = b->alt, n = 1; *p; ++p)
+ if (*p == ',') ++n;
+ b->n_alleles = n + 1;
+ }
+ // set n_gi and gi[i].fmt
+ for (p = b->fmt, n = 1; *p; ++p)
+ if (*p == ':') ++n;
+ if (n > b->m_gi) {
+ int old_m = b->m_gi;
+ b->m_gi = n;
+ kroundup32(b->m_gi);
+ b->gi = realloc(b->gi, b->m_gi * sizeof(bcf_ginfo_t));
+ memset(b->gi + old_m, 0, (b->m_gi - old_m) * sizeof(bcf_ginfo_t));
+ }
+ b->n_gi = n;
+ for (p = kstrtok(b->fmt, ":", &aux), n = 0; p; p = kstrtok(0, 0, &aux))
+ b->gi[n++].fmt = bcf_str2int(p, aux.p - p);
+ // set gi[i].len
+ for (i = 0; i < b->n_gi; ++i) {
+ if (b->gi[i].fmt == bcf_str2int("PL", 2)) {
+ b->gi[i].len = b->n_alleles * (b->n_alleles + 1) / 2;
+ } else if (b->gi[i].fmt == bcf_str2int("DP", 2) || b->gi[i].fmt == bcf_str2int("HQ", 2)) {
+ b->gi[i].len = 2;
+ } else if (b->gi[i].fmt == bcf_str2int("GQ", 2) || b->gi[i].fmt == bcf_str2int("GT", 2)) {
+ b->gi[i].len = 1;
+ } else if (b->gi[i].fmt == bcf_str2int("GL", 2)) {
+ b->gi[i].len = b->n_alleles * (b->n_alleles + 1) / 2 * 4;
+ }
+ b->gi[i].data = realloc(b->gi[i].data, n_smpl * b->gi[i].len);
+ }
+ return 0;
+}
+
+int bcf_write(bcf_t *bp, const bcf_hdr_t *h, const bcf1_t *b)
+{
+ int i, l = 0;
+ if (b == 0) return -1;
+ bgzf_write(bp->fp, &b->tid, 4);
+ bgzf_write(bp->fp, &b->pos, 4);
+ bgzf_write(bp->fp, &b->qual, 4);
+ bgzf_write(bp->fp, &b->l_str, 4);
+ bgzf_write(bp->fp, b->str, b->l_str);
+ l = 12 + b->l_str;
+ for (i = 0; i < b->n_gi; ++i) {
+ bgzf_write(bp->fp, b->gi[i].data, b->gi[i].len * h->n_smpl);
+ l += b->gi[i].len * h->n_smpl;
+ }
+ return l;
+}
+
+int bcf_read(bcf_t *bp, const bcf_hdr_t *h, bcf1_t *b)
+{
+ int i, l = 0;
+ if (b == 0) return -1;
+ if (bgzf_read(bp->fp, &b->tid, 4) == 0) return -1;
+ b->n_smpl = h->n_smpl;
+ bgzf_read(bp->fp, &b->pos, 4);
+ bgzf_read(bp->fp, &b->qual, 4);
+ bgzf_read(bp->fp, &b->l_str, 4);
+ if (b->l_str > b->m_str) {
+ b->m_str = b->l_str;
+ kroundup32(b->m_str);
+ b->str = realloc(b->str, b->m_str);
+ }
+ bgzf_read(bp->fp, b->str, b->l_str);
+ l = 12 + b->l_str;
+ bcf_sync(b);
+ for (i = 0; i < b->n_gi; ++i) {
+ bgzf_read(bp->fp, b->gi[i].data, b->gi[i].len * h->n_smpl);
+ l += b->gi[i].len * h->n_smpl;
+ }
+ return l;
+}
+
+int bcf_destroy(bcf1_t *b)
+{
+ int i;
+ if (b == 0) return -1;
+ free(b->str);
+ for (i = 0; i < b->m_gi; ++i)
+ free(b->gi[i].data);
+ free(b->gi);
+ free(b);
+ return 0;
+}
+
+static inline void fmt_str(const char *p, kstring_t *s)
+{
+ if (*p == 0) kputc('.', s);
+ else kputs(p, s);
+}
+
+void bcf_fmt_core(const bcf_hdr_t *h, bcf1_t *b, kstring_t *s)
+{
+ int i, j, x;
+ s->l = 0;
+ if (h->n_ref) kputs(h->ns[b->tid], s);
+ else kputw(b->tid, s);
+ kputc('\t', s);
+ kputw(b->pos + 1, s); kputc('\t', s);
+ fmt_str(b->str, s); kputc('\t', s);
+ fmt_str(b->ref, s); kputc('\t', s);
+ fmt_str(b->alt, s); kputc('\t', s);
+ ksprintf(s, "%.3g", b->qual); kputc('\t', s);
+ fmt_str(b->flt, s); kputc('\t', s);
+ fmt_str(b->info, s);
+ if (b->fmt[0]) {
+ kputc('\t', s);
+ fmt_str(b->fmt, s);
+ }
+ x = b->n_alleles * (b->n_alleles + 1) / 2;
+ if (b->n_gi == 0) return;
+ for (j = 0; j < h->n_smpl; ++j) {
+ kputc('\t', s);
+ for (i = 0; i < b->n_gi; ++i) {
+ if (i) kputc(':', s);
+ if (b->gi[i].fmt == bcf_str2int("PL", 2)) {
+ uint8_t *d = (uint8_t*)b->gi[i].data + j * x;
+ int k;
+ for (k = 0; k < x; ++k) {
+ if (k > 0) kputc(',', s);
+ kputw(d[k], s);
+ }
+ } else if (b->gi[i].fmt == bcf_str2int("DP", 2)) {
+ kputw(((uint16_t*)b->gi[i].data)[j], s);
+ } else if (b->gi[i].fmt == bcf_str2int("GQ", 2)) {
+ kputw(((uint8_t*)b->gi[i].data)[j], s);
+ } else if (b->gi[i].fmt == bcf_str2int("GT", 2)) {
+ int y = ((uint8_t*)b->gi[i].data)[j];
+ if (y>>7&1) {
+ kputsn("./.", 3, s);
+ } else {
+ kputc('0' + (y>>3&7), s);
+ kputc("/|"[y>>6&1], s);
+ kputc('0' + (y&7), s);
+ }
+ } else if (b->gi[i].fmt == bcf_str2int("GL", 2)) {
+ float *d = (float*)b->gi[i].data + j * x;
+ int k;
+ //printf("- %lx\n", d);
+ for (k = 0; k < x; ++k) {
+ if (k > 0) kputc(',', s);
+ ksprintf(s, "%.2f", d[k]);
+ }
+ }
+ }
+ }
+}
+
+char *bcf_fmt(const bcf_hdr_t *h, bcf1_t *b)
+{
+ kstring_t s;
+ s.l = s.m = 0; s.s = 0;
+ bcf_fmt_core(h, b, &s);
+ return s.s;
+}
+
+int bcf_append_info(bcf1_t *b, const char *info, int l)
+{
+ int shift = b->fmt - b->str;
+ int l_fmt = b->l_str - shift;
+ char *ori = b->str;
+ if (b->l_str + l > b->m_str) { // enlarge if necessary
+ b->m_str = b->l_str + l;
+ kroundup32(b->m_str);
+ b->str = realloc(b->str, b->m_str);
+ }
+ memmove(b->str + shift + l, b->str + shift, l_fmt); // move the FORMAT field
+ memcpy(b->str + shift - 1, info, l); // append to the INFO field
+ b->str[shift + l - 1] = '\0';
+ b->fmt = b->str + shift + l;
+ b->l_str += l;
+ if (ori != b->str) bcf_sync(b); // synchronize when realloc changes the pointer
+ return 0;
+}
+
+int bcf_cpy(bcf1_t *r, const bcf1_t *b)
+{
+ char *t1 = r->str;
+ bcf_ginfo_t *t2 = r->gi;
+ int i, t3 = r->m_str, t4 = r->m_gi;
+ *r = *b;
+ r->str = t1; r->gi = t2; r->m_str = t3; r->m_gi = t4;
+ if (r->m_str < b->m_str) {
+ r->m_str = b->m_str;
+ r->str = realloc(r->str, r->m_str);
+ }
+ memcpy(r->str, b->str, r->m_str);
+ bcf_sync(r); // calling bcf_sync() is simple but inefficient
+ for (i = 0; i < r->n_gi; ++i)
+ memcpy(r->gi[i].data, b->gi[i].data, r->n_smpl * r->gi[i].len);
+ return 0;
+}
projects / samtools.git / blobdiff