From 42e48c7bca66d4e8d06deedaccea77ae6ab352dd Mon Sep 17 00:00:00 2001 From: Heng Li Date: Thu, 9 Jul 2009 13:01:42 +0000 Subject: [PATCH] * samtools-0.1.5-1 (r390) * removed useless _IOLIB in bam.h. This should cause no change at all. * added bam_lite.c for light-weight BAM reading --- bam.h | 37 +--- bam_lite.c | 576 +++++++++++++++++++++++++++++++++++++++++++++++++++++ bamtk.c | 2 +- 3 files changed, 587 insertions(+), 28 deletions(-) create mode 100644 bam_lite.c diff --git a/bam.h b/bam.h index 83c03ad..124817e 100644 --- a/bam.h +++ b/bam.h @@ -45,21 +45,7 @@ #include #include -#define _IOLIB 2 - -#if _IOLIB == 1 && !defined(_NO_RAZF) -#define BAM_TRUE_OFFSET -#include "razf.h" -/*! @abstract BAM file handler */ -typedef RAZF *bamFile; -#define bam_open(fn, mode) razf_open(fn, mode) -#define bam_dopen(fd, mode) razf_dopen(fd, mode) -#define bam_close(fp) razf_close(fp) -#define bam_read(fp, buf, size) razf_read(fp, buf, size) -#define bam_write(fp, buf, size) razf_write(fp, buf, size) -#define bam_tell(fp) razf_tell(fp) -#define bam_seek(fp, pos, dir) razf_seek(fp, pos, dir) -#elif _IOLIB == 2 +#ifndef BAM_LITE #define BAM_VIRTUAL_OFFSET16 #include "bgzf.h" /*! @abstract BAM file handler */ @@ -71,18 +57,15 @@ typedef BGZF *bamFile; #define bam_write(fp, buf, size) bgzf_write(fp, buf, size) #define bam_tell(fp) bgzf_tell(fp) #define bam_seek(fp, pos, dir) bgzf_seek(fp, pos, dir) -#elif _IOLIB == 3 -#define BAM_VIRTUAL_OFFSET16 -#include "razf.h" -/*! @abstract BAM file handler */ -typedef RAZF *bamFile; -#define bam_open(fn, mode) razf_open2(fn, mode) -#define bam_dopen(fd, mode) razf_dopen2(fd, mode) -#define bam_close(fp) razf_close(fp) -#define bam_read(fp, buf, size) razf_read(fp, buf, size) -#define bam_write(fp, buf, size) razf_write(fp, buf, size) -#define bam_tell(fp) razf_tell2(fp) -#define bam_seek(fp, pos, dir) razf_seek2(fp, pos, dir) +#else +#define BAM_TRUE_OFFSET +#include +typedef gzFile bamFile; +#define bam_open(fn, mode) gzopen(fn, mode) +#define bam_dopen(fd, mode) gzdopen(fd, mode) +#define bam_close(fp) gzclose(fp) +#define bam_read(fp, buf, size) gzread(fp, buf, size) +/* no bam_write/bam_tell/bam_seek() here */ #endif /*! @typedef diff --git a/bam_lite.c b/bam_lite.c new file mode 100644 index 0000000..12c719c --- /dev/null +++ b/bam_lite.c @@ -0,0 +1,576 @@ +#include +#include +#include + +#define BAM_LITE +#include "bam.h" + +#undef bam_open +#undef bam_dopen +#undef bam_close +#undef bam_read +#undef bam_write +#undef bam_tell +#undef bam_seek + +#define bam_open(fn, mode) gzopen(fn, mode) +#define bam_dopen(fd, mode) gzdopen(fd, mode) +#define bam_close(fp) gzclose(fp) +#define bam_read(fp, buf, size) gzread(fp, buf, size) + +#define BAM_NO_HASH + +char *bam_nt16_rev_table = "=ACMGRSVTWYHKDBN"; + +/************************* + *** from bam_endian.h *** + *************************/ + +static inline int bam_is_big_endian() +{ + long one= 1; + return !(*((char *)(&one))); +} +static inline uint16_t bam_swap_endian_2(uint16_t v) +{ + return (uint16_t)(((v & 0x00FF00FFU) << 8) | ((v & 0xFF00FF00U) >> 8)); +} +static inline void *bam_swap_endian_2p(void *x) +{ + *(uint16_t*)x = bam_swap_endian_2(*(uint16_t*)x); + return x; +} +static inline uint32_t bam_swap_endian_4(uint32_t v) +{ + v = ((v & 0x0000FFFFU) << 16) | (v >> 16); + return ((v & 0x00FF00FFU) << 8) | ((v & 0xFF00FF00U) >> 8); +} +static inline void *bam_swap_endian_4p(void *x) +{ + *(uint32_t*)x = bam_swap_endian_4(*(uint32_t*)x); + return x; +} +static inline uint64_t bam_swap_endian_8(uint64_t v) +{ + v = ((v & 0x00000000FFFFFFFFLLU) << 32) | (v >> 32); + v = ((v & 0x0000FFFF0000FFFFLLU) << 16) | ((v & 0xFFFF0000FFFF0000LLU) >> 16); + return ((v & 0x00FF00FF00FF00FFLLU) << 8) | ((v & 0xFF00FF00FF00FF00LLU) >> 8); +} +static inline void *bam_swap_endian_8p(void *x) +{ + *(uint64_t*)x = bam_swap_endian_8(*(uint64_t*)x); + return x; +} + +/********************** + *** from kstring.* *** + **********************/ + +typedef struct __kstring_t { + size_t l, m; + char *s; +} kstring_t; + +#ifndef kroundup32 +#define kroundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x)) +#endif + +static inline int kputsn(const char *p, int l, kstring_t *s) +{ + if (s->l + l + 1 >= s->m) { + s->m = s->l + l + 2; + kroundup32(s->m); + s->s = (char*)realloc(s->s, s->m); + } + strncpy(s->s + s->l, p, l); + s->l += l; + s->s[s->l] = 0; + return l; +} + +static inline int kputs(const char *p, kstring_t *s) +{ + return kputsn(p, strlen(p), s); +} + +static inline int kputc(int c, kstring_t *s) +{ + if (s->l + 1 >= s->m) { + s->m = s->l + 2; + kroundup32(s->m); + s->s = (char*)realloc(s->s, s->m); + } + s->s[s->l++] = c; + s->s[s->l] = 0; + return c; +} + +int ksprintf(kstring_t *s, const char *fmt, ...) +{ + va_list ap; + int l; + va_start(ap, fmt); + l = vsnprintf(s->s + s->l, s->m - s->l, fmt, ap); // This line does not work with glibc 2.0. See `man snprintf'. + va_end(ap); + if (l + 1 > s->m - s->l) { + s->m = s->l + l + 2; + kroundup32(s->m); + s->s = (char*)realloc(s->s, s->m); + va_start(ap, fmt); + l = vsnprintf(s->s + s->l, s->m - s->l, fmt, ap); + } + va_end(ap); + s->l += l; + return l; +} + +/****************** + *** from bam.c *** + ******************/ + +int bam_is_be = 0; + +/************************** + * CIGAR related routines * + **************************/ + +int bam_segreg(int32_t pos, const bam1_core_t *c, const uint32_t *cigar, bam_segreg_t *reg) +{ + unsigned k; + int32_t x = c->pos, y = 0; + int state = 0; + for (k = 0; k < c->n_cigar; ++k) { + int op = cigar[k] & BAM_CIGAR_MASK; // operation + int l = cigar[k] >> BAM_CIGAR_SHIFT; // length + if (state == 0 && (op == BAM_CMATCH || op == BAM_CDEL || op == BAM_CINS) && x + l > pos) { + reg->tbeg = x; reg->qbeg = y; reg->cbeg = k; + state = 1; + } + if (op == BAM_CMATCH) { x += l; y += l; } + else if (op == BAM_CDEL || op == BAM_CREF_SKIP) x += l; + else if (op == BAM_CINS || op == BAM_CSOFT_CLIP) y += l; + if (state == 1 && (op == BAM_CSOFT_CLIP || op == BAM_CHARD_CLIP || op == BAM_CREF_SKIP || k == c->n_cigar - 1)) { + reg->tend = x; reg->qend = y; reg->cend = k; + } + } + return state? 0 : -1; +} + +uint32_t bam_calend(const bam1_core_t *c, const uint32_t *cigar) +{ + uint32_t k, end; + end = c->pos; + for (k = 0; k < c->n_cigar; ++k) { + int op = cigar[k] & BAM_CIGAR_MASK; + if (op == BAM_CMATCH || op == BAM_CDEL || op == BAM_CREF_SKIP) + end += cigar[k] >> BAM_CIGAR_SHIFT; + } + return end; +} + +int32_t bam_cigar2qlen(const bam1_core_t *c, const uint32_t *cigar) +{ + uint32_t k; + int32_t l = 0; + for (k = 0; k < c->n_cigar; ++k) { + int op = cigar[k] & BAM_CIGAR_MASK; + if (op == BAM_CMATCH || op == BAM_CINS || op == BAM_CSOFT_CLIP) + l += cigar[k] >> BAM_CIGAR_SHIFT; + } + return l; +} + +/******************** + * BAM I/O routines * + ********************/ + +bam_header_t *bam_header_init() +{ + bam_is_be = bam_is_big_endian(); + return (bam_header_t*)calloc(1, sizeof(bam_header_t)); +} + +void bam_header_destroy(bam_header_t *header) +{ + int32_t i; + extern void bam_destroy_header_hash(bam_header_t *header); + if (header == 0) return; + if (header->target_name) { + for (i = 0; i < header->n_targets; ++i) + free(header->target_name[i]); + free(header->target_name); + free(header->target_len); + } + free(header->text); +#ifndef BAM_NO_HASH + if (header->rg2lib) bam_strmap_destroy(header->rg2lib); + bam_destroy_header_hash(header); +#endif + free(header); +} + +bam_header_t *bam_header_read(bamFile fp) +{ + bam_header_t *header; + char buf[4]; + int32_t i, name_len; + // read "BAM1" + if (bam_read(fp, buf, 4) != 4) return 0; + if (strncmp(buf, "BAM\001", 4)) { + fprintf(stderr, "[bam_header_read] wrong header\n"); + return 0; + } + header = bam_header_init(); + // read plain text and the number of reference sequences + bam_read(fp, &header->l_text, 4); + if (bam_is_be) bam_swap_endian_4p(&header->l_text); + header->text = (char*)calloc(header->l_text + 1, 1); + bam_read(fp, header->text, header->l_text); + bam_read(fp, &header->n_targets, 4); + if (bam_is_be) bam_swap_endian_4p(&header->n_targets); + // read reference sequence names and lengths + header->target_name = (char**)calloc(header->n_targets, sizeof(char*)); + header->target_len = (uint32_t*)calloc(header->n_targets, 4); + for (i = 0; i != header->n_targets; ++i) { + bam_read(fp, &name_len, 4); + if (bam_is_be) bam_swap_endian_4p(&name_len); + header->target_name[i] = (char*)calloc(name_len, 1); + bam_read(fp, header->target_name[i], name_len); + bam_read(fp, &header->target_len[i], 4); + if (bam_is_be) bam_swap_endian_4p(&header->target_len[i]); + } + return header; +} + +static void swap_endian_data(const bam1_core_t *c, int data_len, uint8_t *data) +{ + uint8_t *s; + uint32_t i, *cigar = (uint32_t*)(data + c->l_qname); + s = data + c->n_cigar*4 + c->l_qname + c->l_qseq + (c->l_qseq + 1)/2; + for (i = 0; i < c->n_cigar; ++i) bam_swap_endian_4p(&cigar[i]); + while (s < data + data_len) { + uint8_t type; + s += 2; // skip key + type = toupper(*s); ++s; // skip type + if (type == 'C' || type == 'A') ++s; + else if (type == 'S') { bam_swap_endian_2p(s); s += 2; } + else if (type == 'I' || type == 'F') { bam_swap_endian_4p(s); s += 4; } + else if (type == 'D') { bam_swap_endian_8p(s); s += 8; } + else if (type == 'Z' || type == 'H') { while (*s) ++s; ++s; } + } +} + +int bam_read1(bamFile fp, bam1_t *b) +{ + bam1_core_t *c = &b->core; + int32_t block_len, ret, i; + uint32_t x[8]; + + assert(BAM_CORE_SIZE == 32); + if ((ret = bam_read(fp, &block_len, 4)) != 4) { + if (ret == 0) return -1; // normal end-of-file + else return -2; // truncated + } + if (bam_read(fp, x, BAM_CORE_SIZE) != BAM_CORE_SIZE) return -3; + if (bam_is_be) { + bam_swap_endian_4p(&block_len); + for (i = 0; i < 8; ++i) bam_swap_endian_4p(x + i); + } + c->tid = x[0]; c->pos = x[1]; + c->bin = x[2]>>16; c->qual = x[2]>>8&0xff; c->l_qname = x[2]&0xff; + c->flag = x[3]>>16; c->n_cigar = x[3]&0xffff; + c->l_qseq = x[4]; + c->mtid = x[5]; c->mpos = x[6]; c->isize = x[7]; + b->data_len = block_len - BAM_CORE_SIZE; + if (b->m_data < b->data_len) { + b->m_data = b->data_len; + kroundup32(b->m_data); + b->data = (uint8_t*)realloc(b->data, b->m_data); + } + if (bam_read(fp, b->data, b->data_len) != b->data_len) return -4; + b->l_aux = b->data_len - c->n_cigar * 4 - c->l_qname - c->l_qseq - (c->l_qseq+1)/2; + if (bam_is_be) swap_endian_data(c, b->data_len, b->data); + return 4 + block_len; +} + +char *bam_format1(const bam_header_t *header, const bam1_t *b) +{ + uint8_t *s = bam1_seq(b), *t = bam1_qual(b); + int i; + const bam1_core_t *c = &b->core; + kstring_t str; + str.l = str.m = 0; str.s = 0; + + ksprintf(&str, "%s\t%d\t", bam1_qname(b), c->flag); + if (c->tid < 0) kputs("*\t", &str); + else ksprintf(&str, "%s\t", header->target_name[c->tid]); + ksprintf(&str, "%d\t%d\t", c->pos + 1, c->qual); + if (c->n_cigar == 0) kputc('*', &str); + else { + for (i = 0; i < c->n_cigar; ++i) + ksprintf(&str, "%d%c", bam1_cigar(b)[i]>>BAM_CIGAR_SHIFT, "MIDNSHP"[bam1_cigar(b)[i]&BAM_CIGAR_MASK]); + } + kputc('\t', &str); + if (c->mtid < 0) kputs("*\t", &str); + else if (c->mtid == c->tid) kputs("=\t", &str); + else ksprintf(&str, "%s\t", header->target_name[c->mtid]); + ksprintf(&str, "%d\t%d\t", c->mpos + 1, c->isize); + for (i = 0; i < c->l_qseq; ++i) kputc(bam_nt16_rev_table[bam1_seqi(s, i)], &str); + kputc('\t', &str); + if (t[0] == 0xff) kputc('*', &str); + else for (i = 0; i < c->l_qseq; ++i) kputc(t[i] + 33, &str); + s = bam1_aux(b); + while (s < b->data + b->data_len) { + uint8_t type, key[2]; + key[0] = s[0]; key[1] = s[1]; + s += 2; type = *s; ++s; + ksprintf(&str, "\t%c%c:", key[0], key[1]); + if (type == 'A') { ksprintf(&str, "A:%c", *s); ++s; } + else if (type == 'C') { ksprintf(&str, "i:%u", *s); ++s; } + else if (type == 'c') { ksprintf(&str, "i:%d", *s); ++s; } + else if (type == 'S') { ksprintf(&str, "i:%u", *(uint16_t*)s); s += 2; } + else if (type == 's') { ksprintf(&str, "i:%d", *(int16_t*)s); s += 2; } + else if (type == 'I') { ksprintf(&str, "i:%u", *(uint32_t*)s); s += 4; } + else if (type == 'i') { ksprintf(&str, "i:%d", *(int32_t*)s); s += 4; } + else if (type == 'f') { ksprintf(&str, "f:%g", *(float*)s); s += 4; } + else if (type == 'd') { ksprintf(&str, "d:%lg", *(double*)s); s += 8; } + else if (type == 'Z' || type == 'H') { ksprintf(&str, "%c:", type); while (*s) kputc(*s++, &str); ++s; } + } + return str.s; +} + +/************************* + *** from bam_pileup.c *** + *************************/ + +typedef struct __linkbuf_t { + bam1_t b; + uint32_t beg, end; + struct __linkbuf_t *next; +} lbnode_t; + +/* --- BEGIN: Memory pool */ + +typedef struct { + int cnt, n, max; + lbnode_t **buf; +} mempool_t; + +static mempool_t *mp_init() +{ + mempool_t *mp; + mp = (mempool_t*)calloc(1, sizeof(mempool_t)); + return mp; +} +static void mp_destroy(mempool_t *mp) +{ + int k; + for (k = 0; k < mp->n; ++k) { + free(mp->buf[k]->b.data); + free(mp->buf[k]); + } + free(mp->buf); + free(mp); +} +static inline lbnode_t *mp_alloc(mempool_t *mp) +{ + ++mp->cnt; + if (mp->n == 0) return (lbnode_t*)calloc(1, sizeof(lbnode_t)); + else return mp->buf[--mp->n]; +} +static inline void mp_free(mempool_t *mp, lbnode_t *p) +{ + --mp->cnt; p->next = 0; // clear lbnode_t::next here + if (mp->n == mp->max) { + mp->max = mp->max? mp->max<<1 : 256; + mp->buf = (lbnode_t**)realloc(mp->buf, sizeof(lbnode_t*) * mp->max); + } + mp->buf[mp->n++] = p; +} + +/* --- END: Memory pool */ + +/* --- BEGIN: Auxiliary functions */ + +static inline int resolve_cigar(bam_pileup1_t *p, uint32_t pos) +{ + unsigned k; + bam1_t *b = p->b; + bam1_core_t *c = &b->core; + uint32_t x = c->pos, y = 0; + int ret = 1, is_restart = 1; + + if (c->flag&BAM_FUNMAP) return 0; // unmapped read + assert(x <= pos); // otherwise a bug + p->qpos = -1; p->indel = 0; p->is_del = p->is_head = p->is_tail = 0; + for (k = 0; k < c->n_cigar; ++k) { + int op = bam1_cigar(b)[k] & BAM_CIGAR_MASK; // operation + int l = bam1_cigar(b)[k] >> BAM_CIGAR_SHIFT; // length + if (op == BAM_CMATCH) { // NOTE: this assumes the first and the last operation MUST BE a match or a clip + if (x + l > pos) { // overlap with pos + p->indel = p->is_del = 0; + p->qpos = y + (pos - x); + if (x == pos && is_restart) p->is_head = 1; + if (x + l - 1 == pos) { // come to the end of a match + if (k < c->n_cigar - 1) { // there are additional operation(s) + uint32_t cigar = bam1_cigar(b)[k+1]; // next CIGAR + int op_next = cigar&BAM_CIGAR_MASK; // next CIGAR operation + if (op_next == BAM_CDEL) p->indel = -(int32_t)(cigar>>BAM_CIGAR_SHIFT); // del + else if (op_next == BAM_CINS) p->indel = cigar>>BAM_CIGAR_SHIFT; // ins + if (op_next == BAM_CSOFT_CLIP || op_next == BAM_CREF_SKIP || op_next == BAM_CHARD_CLIP) + p->is_tail = 1; // tail + } else p->is_tail = 1; // this is the last operation; set tail + } + } + x += l; y += l; + } else if (op == BAM_CDEL) { // then set ->is_del + if (x + l > pos) { + p->indel = 0; p->is_del = 1; + p->qpos = y + (pos - x); + } + x += l; + } else if (op == BAM_CREF_SKIP) x += l; + else if (op == BAM_CINS || op == BAM_CSOFT_CLIP) y += l; + is_restart = (op == BAM_CREF_SKIP || op == BAM_CSOFT_CLIP || op == BAM_CHARD_CLIP); + if (x > pos) { + if (op == BAM_CREF_SKIP) ret = 0; // then do not put it into pileup at all + break; + } + } + assert(x > pos); // otherwise a bug + return ret; +} + +/* --- END: Auxiliary functions */ + +struct __bam_plbuf_t { + mempool_t *mp; + lbnode_t *head, *tail, *dummy; + bam_pileup_f func; + void *func_data; + int32_t tid, pos, max_tid, max_pos; + int max_pu, is_eof; + bam_pileup1_t *pu; + int flag_mask; +}; + +void bam_plbuf_reset(bam_plbuf_t *buf) +{ + lbnode_t *p, *q; + buf->max_tid = buf->max_pos = -1; + buf->tid = buf->pos = 0; + buf->is_eof = 0; + for (p = buf->head; p->next;) { + q = p->next; + mp_free(buf->mp, p); + p = q; + } + buf->head = buf->tail; +} + +void bam_plbuf_set_mask(bam_plbuf_t *buf, int mask) +{ + if (mask < 0) buf->flag_mask = BAM_DEF_MASK; + else buf->flag_mask = BAM_FUNMAP | mask; +} + +bam_plbuf_t *bam_plbuf_init(bam_pileup_f func, void *data) +{ + bam_plbuf_t *buf; + buf = (bam_plbuf_t*)calloc(1, sizeof(bam_plbuf_t)); + buf->func = func; buf->func_data = data; + buf->mp = mp_init(); + buf->head = buf->tail = mp_alloc(buf->mp); + buf->dummy = mp_alloc(buf->mp); + buf->max_tid = buf->max_pos = -1; + buf->flag_mask = BAM_DEF_MASK; + return buf; +} + +void bam_plbuf_destroy(bam_plbuf_t *buf) +{ + mp_free(buf->mp, buf->dummy); + mp_free(buf->mp, buf->head); + if (buf->mp->cnt != 0) + fprintf(stderr, "[bam_plbuf_destroy] memory leak: %d. Continue anyway.\n", buf->mp->cnt); + mp_destroy(buf->mp); + free(buf->pu); + free(buf); +} + +int bam_plbuf_push(const bam1_t *b, bam_plbuf_t *buf) +{ + if (b) { // fill buffer + if (b->core.tid < 0) return 0; + if (b->core.flag & buf->flag_mask) return 0; + bam_copy1(&buf->tail->b, b); + buf->tail->beg = b->core.pos; buf->tail->end = bam_calend(&b->core, bam1_cigar(b)); + if (!(b->core.tid >= buf->max_tid || (b->core.tid == buf->max_tid && buf->tail->beg >= buf->max_pos))) { + fprintf(stderr, "[bam_pileup_core] the input is not sorted. Abort!\n"); + abort(); + } + buf->max_tid = b->core.tid; buf->max_pos = buf->tail->beg; + if (buf->tail->end > buf->pos || buf->tail->b.core.tid > buf->tid) { + buf->tail->next = mp_alloc(buf->mp); + buf->tail = buf->tail->next; + } + } else buf->is_eof = 1; + while (buf->is_eof || buf->max_tid > buf->tid || (buf->max_tid == buf->tid && buf->max_pos > buf->pos)) { + int n_pu = 0; + lbnode_t *p, *q; + buf->dummy->next = buf->head; + for (p = buf->head, q = buf->dummy; p->next; q = p, p = p->next) { + if (p->b.core.tid < buf->tid || (p->b.core.tid == buf->tid && p->end <= buf->pos)) { // then remove from the list + q->next = p->next; mp_free(buf->mp, p); p = q; + } else if (p->b.core.tid == buf->tid && p->beg <= buf->pos) { // here: p->end > pos; then add to pileup + if (n_pu == buf->max_pu) { // then double the capacity + buf->max_pu = buf->max_pu? buf->max_pu<<1 : 256; + buf->pu = (bam_pileup1_t*)realloc(buf->pu, sizeof(bam_pileup1_t) * buf->max_pu); + } + buf->pu[n_pu].b = &p->b; + if (resolve_cigar(buf->pu + n_pu, buf->pos)) ++n_pu; // skip the read if we are looking at BAM_CREF_SKIP + } + } + buf->head = buf->dummy->next; // dummy->next may be changed + if (n_pu) { // then call user defined function + buf->func(buf->tid, buf->pos, n_pu, buf->pu, buf->func_data); + } + // update tid and pos + if (buf->head->next) { + if (buf->tid > buf->head->b.core.tid) { + fprintf(stderr, "[bam_plbuf_push] unsorted input. Pileup aborts.\n"); + return 1; + } + } + if (buf->tid < buf->head->b.core.tid) { // come to a new reference sequence + buf->tid = buf->head->b.core.tid; buf->pos = buf->head->beg; // jump to the next reference + } else if (buf->pos < buf->head->beg) { // here: tid == head->b.core.tid + buf->pos = buf->head->beg; // jump to the next position + } else ++buf->pos; // scan contiguously + if (buf->is_eof && buf->head->next == 0) break; + } + return 0; +} + +/********************** + *** from bam_aux.c *** + **********************/ + +uint8_t *bam_aux_get(const bam1_t *b, const char tag[2]) +{ + uint8_t *s; + int y = tag[0]<<8 | tag[1]; + s = bam1_aux(b); + while (s < b->data + b->data_len) { + int type, x = (int)s[0]<<8 | s[1]; + s += 2; + if (x == y) return s; + type = toupper(*s); ++s; + if (type == 'C') ++s; + else if (type == 'S') s += 2; + else if (type == 'I' || type == 'F') s += 4; + else if (type == 'D') s += 8; + else if (type == 'Z' || type == 'H') { while (*s) ++s; ++s; } + } + return 0; +} diff --git a/bamtk.c b/bamtk.c index 3386836..f253852 100644 --- a/bamtk.c +++ b/bamtk.c @@ -4,7 +4,7 @@ #include "bam.h" #ifndef PACKAGE_VERSION -#define PACKAGE_VERSION "0.1.5c (r385)" +#define PACKAGE_VERSION "0.1.5-1 (r390)" #endif int bam_taf2baf(int argc, char *argv[]); -- 2.39.2