--- /dev/null
+#include <zlib.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "bcf.h"
+#include "kstring.h"
+#include "kseq.h"
+KSTREAM_INIT(gzFile, gzread, 4096)
+
+typedef struct {
+ gzFile fp;
+ FILE *fpout;
+ kstream_t *ks;
+ void *refhash;
+ kstring_t line;
+ int max_ref;
+} vcf_t;
+
+bcf_hdr_t *vcf_hdr_read(bcf_t *bp)
+{
+ kstring_t meta, smpl;
+ int dret;
+ vcf_t *v;
+ bcf_hdr_t *h;
+ if (!bp->is_vcf) return bcf_hdr_read(bp);
+ h = calloc(1, sizeof(bcf_hdr_t));
+ v = (vcf_t*)bp->v;
+ v->line.l = 0;
+ memset(&meta, 0, sizeof(kstring_t));
+ memset(&smpl, 0, sizeof(kstring_t));
+ while (ks_getuntil(v->ks, '\n', &v->line, &dret) >= 0) {
+ if (v->line.l < 2) continue;
+ if (v->line.s[0] != '#') return 0; // no sample line
+ if (v->line.s[0] == '#' && v->line.s[1] == '#') {
+ kputsn(v->line.s, v->line.l, &meta); kputc('\n', &meta);
+ } else if (v->line.s[0] == '#') {
+ int k;
+ ks_tokaux_t aux;
+ char *p;
+ for (p = kstrtok(v->line.s, "\t\n", &aux), k = 0; p; p = kstrtok(0, 0, &aux), ++k) {
+ if (k >= 9) {
+ kputsn(p, aux.p - p, &smpl);
+ kputc('\0', &smpl);
+ }
+ }
+ break;
+ }
+ }
+ kputc('\0', &meta);
+ h->name = 0;
+ h->sname = smpl.s; h->l_smpl = smpl.l;
+ h->txt = meta.s; h->l_txt = meta.l;
+ bcf_hdr_sync(h);
+ return h;
+}
+
+bcf_t *vcf_open(const char *fn, const char *mode)
+{
+ bcf_t *bp;
+ vcf_t *v;
+ if (strchr(mode, 'b')) return bcf_open(fn, mode);
+ bp = calloc(1, sizeof(bcf_t));
+ v = calloc(1, sizeof(vcf_t));
+ bp->is_vcf = 1;
+ bp->v = v;
+ v->refhash = bcf_str2id_init();
+ if (strchr(mode, 'r')) {
+ v->fp = strcmp(fn, "-")? gzopen(fn, "r") : gzdopen(fileno(stdin), "r");
+ v->ks = ks_init(v->fp);
+ } else if (strchr(mode, 'w'))
+ v->fpout = strcmp(fn, "-")? fopen(fn, "w") : stdout;
+ return bp;
+}
+
+int vcf_close(bcf_t *bp)
+{
+ vcf_t *v;
+ if (bp == 0) return -1;
+ if (!bp->is_vcf) return bcf_close(bp);
+ v = (vcf_t*)bp->v;
+ if (v->fp) {
+ ks_destroy(v->ks);
+ gzclose(v->fp);
+ }
+ if (v->fpout) fclose(v->fpout);
+ free(v->line.s);
+ bcf_str2id_destroy(v->refhash);
+ free(v);
+ free(bp);
+ return 0;
+}
+
+int vcf_hdr_write(bcf_t *bp, const bcf_hdr_t *h)
+{
+ vcf_t *v = (vcf_t*)bp->v;
+ int i, has_ref = 0, has_ver = 0;
+ if (!bp->is_vcf) return bcf_hdr_write(bp, h);
+ if (h->l_txt > 0) {
+ if (strstr(h->txt, "##fileformat=")) has_ver = 1;
+ if (has_ver == 0) fprintf(v->fpout, "##fileformat=VCFv4.0\n");
+ fwrite(h->txt, 1, h->l_txt - 1, v->fpout);
+ if (strstr(h->txt, "##SQ=")) has_ref = 1;
+ }
+ if (has_ver == 0) fprintf(v->fpout, "##fileformat=VCFv4.0\n");
+ fprintf(v->fpout, "#CHROM\tPOS\tID\tREF\tALT\tQUAL\tFILTER\tINFO\tFORMAT");
+ for (i = 0; i < h->n_smpl; ++i)
+ fprintf(v->fpout, "\t%s", h->sns[i]);
+ fputc('\n', v->fpout);
+ return 0;
+}
+
+int vcf_write(bcf_t *bp, bcf_hdr_t *h, bcf1_t *b)
+{
+ vcf_t *v = (vcf_t*)bp->v;
+ extern void bcf_fmt_core(const bcf_hdr_t *h, bcf1_t *b, kstring_t *s);
+ if (!bp->is_vcf) return bcf_write(bp, h, b);
+ bcf_fmt_core(h, b, &v->line);
+ fwrite(v->line.s, 1, v->line.l, v->fpout);
+ fputc('\n', v->fpout);
+ return v->line.l + 1;
+}
+
+int vcf_read(bcf_t *bp, bcf_hdr_t *h, bcf1_t *b)
+{
+ int dret, k, i, sync = 0;
+ vcf_t *v = (vcf_t*)bp->v;
+ char *p, *q;
+ kstring_t str, rn;
+ ks_tokaux_t aux, a2;
+ if (!bp->is_vcf) return bcf_read(bp, h, b);
+ v->line.l = 0;
+ str.l = 0; str.m = b->m_str; str.s = b->str;
+ rn.l = rn.m = h->l_nm; rn.s = h->name;
+ if (ks_getuntil(v->ks, '\n', &v->line, &dret) < 0) return -1;
+ b->n_smpl = h->n_smpl;
+ for (p = kstrtok(v->line.s, "\t", &aux), k = 0; p; p = kstrtok(0, 0, &aux), ++k) {
+ *(char*)aux.p = 0;
+ if (k == 0) { // ref
+ int tid = bcf_str2id(v->refhash, p);
+ if (tid < 0) {
+ tid = bcf_str2id_add(v->refhash, p);
+ kputs(p, &rn); kputc('\0', &rn);
+ sync = 1;
+ }
+ b->tid = tid;
+ } else if (k == 1) { // pos
+ b->pos = atoi(p) - 1;
+ } else if (k == 5) { // qual
+ b->qual = (p[0] >= '0' && p[0] <= '9')? atof(p) : 0;
+ } else if (k <= 8) { // variable length strings
+ kputs(p, &str); kputc('\0', &str);
+ b->l_str = str.l; b->m_str = str.m; b->str = str.s;
+ if (k == 8) bcf_sync(b);
+ } else { // k > 9
+ if (strncmp(p, "./.", 3) == 0) {
+ for (i = 0; i < b->n_gi; ++i) {
+ if (b->gi[i].fmt == bcf_str2int("GT", 2)) {
+ ((uint8_t*)b->gi[i].data)[k-9] = 1<<7;
+ } else if (b->gi[i].fmt == bcf_str2int("GQ", 2)) {
+ ((uint8_t*)b->gi[i].data)[k-9] = 0;
+ } else if (b->gi[i].fmt == bcf_str2int("DP", 2)) {
+ ((uint16_t*)b->gi[i].data)[k-9] = 0;
+ } else if (b->gi[i].fmt == bcf_str2int("PL", 2)) {
+ int y = b->n_alleles * (b->n_alleles + 1) / 2;
+ memset((uint8_t*)b->gi[i].data + (k - 9) * y, 0, y);
+ } else if (b->gi[i].fmt == bcf_str2int("GL", 2)) {
+ int y = b->n_alleles * (b->n_alleles + 1) / 2;
+ memset((float*)b->gi[i].data + (k - 9) * y, 0, y * 4);
+ }
+ }
+ goto endblock;
+ }
+ for (q = kstrtok(p, ":", &a2), i = 0; q && i < b->n_gi; q = kstrtok(0, 0, &a2), ++i) {
+ if (b->gi[i].fmt == bcf_str2int("GT", 2)) {
+ ((uint8_t*)b->gi[i].data)[k-9] = (q[0] - '0')<<3 | (q[2] - '0') | (q[1] == '/'? 0 : 1) << 6;
+ } else if (b->gi[i].fmt == bcf_str2int("GQ", 2)) {
+ double _x = strtod(q, &q);
+ int x = (int)(_x + .499);
+ if (x > 255) x = 255;
+ ((uint8_t*)b->gi[i].data)[k-9] = x;
+ } else if (b->gi[i].fmt == bcf_str2int("DP", 2)) {
+ int x = strtol(q, &q, 10);
+ if (x > 0xffff) x = 0xffff;
+ ((uint16_t*)b->gi[i].data)[k-9] = x;
+ } else if (b->gi[i].fmt == bcf_str2int("PL", 2)) {
+ int x, y, j;
+ uint8_t *data = (uint8_t*)b->gi[i].data;
+ y = b->n_alleles * (b->n_alleles + 1) / 2;
+ for (j = 0; j < y; ++j) {
+ x = strtol(q, &q, 10);
+ if (x > 255) x = 255;
+ data[(k-9) * y + j] = x;
+ ++q;
+ }
+ } else if (b->gi[i].fmt == bcf_str2int("GL", 2)) {
+ int j, y;
+ float x, *data = (float*)b->gi[i].data;
+ y = b->n_alleles * (b->n_alleles + 1) / 2;
+ for (j = 0; j < y; ++j) {
+ x = strtod(q, &q);
+ data[(k-9) * y + j] = x;
+ ++q;
+ }
+ }
+ }
+ endblock: i = i;
+ }
+ }
+ h->l_nm = rn.l; h->name = rn.s;
+ if (sync) bcf_hdr_sync(h);
+ return v->line.l + 1;
+}
projects / samtools.git / blobdiff