uint32_t is_del:1, is_head:1, is_tail:1;
} bam_pileup1_t;
- struct __bam_plbuf_t;
- /*! @abstract pileup buffer */
- typedef struct __bam_plbuf_t bam_plbuf_t;
+ struct __bam_plp_t;
+ typedef struct __bam_plp_t *bam_plp_t;
- void bam_plbuf_set_mask(bam_plbuf_t *buf, int mask);
+ bam_plp_t bam_plp_init();
+ int bam_plp_push(bam_plp_t iter, const bam1_t *b);
+ const bam_pileup1_t *bam_plp_next(bam_plp_t iter, int *_n_plp, int *_tid, int *_pos);
+ void bam_plp_set_mask(bam_plp_t iter, int mask);
+ void bam_plp_reset(bam_plp_t iter);
+ void bam_plp_destroy(bam_plp_t iter);
/*! @typedef
@abstract Type of function to be called by bam_plbuf_push().
*/
typedef int (*bam_pileup_f)(uint32_t tid, uint32_t pos, int n, const bam_pileup1_t *pl, void *data);
- /*!
- @abstract Reset a pileup buffer for another pileup process
- @param buf the pileup buffer to be reset
- */
- void bam_plbuf_reset(bam_plbuf_t *buf);
+ typedef struct {
+ bam_plp_t iter;
+ bam_pileup_f func;
+ void *data;
+ } bam_plbuf_t;
- /*!
- @abstract Initialize a buffer for pileup.
- @param func fucntion to be called by bam_pileup_core()
- @param data user provided data
- @return pointer to the pileup buffer
- */
+ void bam_plbuf_set_mask(bam_plbuf_t *buf, int mask);
+ void bam_plbuf_reset(bam_plbuf_t *buf);
bam_plbuf_t *bam_plbuf_init(bam_pileup_f func, void *data);
-
- /*!
- @abstract Destroy a pileup buffer.
- @param buf pointer to the pileup buffer
- */
void bam_plbuf_destroy(bam_plbuf_t *buf);
-
- /*!
- @abstract Push an alignment to the pileup buffer.
- @param b alignment to be pushed
- @param buf pileup buffer
- @see bam_plbuf_init()
- @return always 0 currently
-
- @discussion If all the alignments covering a particular site have
- been collected, this function will call the user defined function
- as is provided to bam_plbuf_init(). The coordinate of the site and
- all the alignments will be transferred to the user defined
- function as function parameters.
-
- When all the alignments are pushed to the buffer, this function
- needs to be called with b equal to NULL. This will flush the
- buffer. A pileup buffer can only be reused when bam_plbuf_reset()
- is called.
- */
int bam_plbuf_push(const bam1_t *b, bam_plbuf_t *buf);
int bam_pileup_file(bamFile fp, int mask, bam_pileup_f func, void *func_data);
/* --- END: Auxiliary functions */
-struct __bam_plbuf_t {
+/*******************
+ * pileup iterator *
+ *******************/
+
+struct __bam_plp_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;
+ int is_eof, flag_mask, max_plp;
+ bam_pileup1_t *plp;
};
-void bam_plbuf_reset(bam_plbuf_t *buf)
+bam_plp_t bam_plp_init(void)
{
- 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;
+ bam_plp_t iter;
+ iter = calloc(1, sizeof(struct __bam_plp_t));
+ iter->mp = mp_init();
+ iter->head = iter->tail = mp_alloc(iter->mp);
+ iter->dummy = mp_alloc(iter->mp);
+ iter->max_tid = iter->max_pos = -1;
+ iter->flag_mask = BAM_DEF_MASK;
+ return iter;
}
-void bam_plbuf_set_mask(bam_plbuf_t *buf, int mask)
+const bam_pileup1_t *bam_plp_next(bam_plp_t iter, int *_n_plp, int *_tid, int *_pos)
{
- 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);
+ *_n_plp = 0;
+ if (iter->is_eof && iter->head->next == 0) return 0;
+ while (iter->is_eof || iter->max_tid > iter->tid || (iter->max_tid == iter->tid && iter->max_pos > iter->pos)) {
+ int n_plp = 0;
+ lbnode_t *p, *q;
+ // write iter->plp at iter->pos
+ iter->dummy->next = iter->head;
+ for (p = iter->head, q = iter->dummy; p->next; q = p, p = p->next) {
+ if (p->b.core.tid < iter->tid || (p->b.core.tid == iter->tid && p->end <= iter->pos)) { // then remove
+ q->next = p->next; mp_free(iter->mp, p); p = q;
+ } else if (p->b.core.tid == iter->tid && p->beg <= iter->pos) { // here: p->end > pos; then add to pileup
+ if (n_plp == iter->max_plp) { // then double the capacity
+ iter->max_plp = iter->max_plp? iter->max_plp<<1 : 256;
+ iter->plp = (bam_pileup1_t*)realloc(iter->plp, sizeof(bam_pileup1_t) * iter->max_plp);
+ }
+ iter->plp[n_plp].b = &p->b;
+ if (resolve_cigar(iter->plp + n_plp, iter->pos)) ++n_plp; // skip the read if we are looking at ref-skip
+ }
+ }
+ iter->head = iter->dummy->next; // dummy->next may be changed
+ *_n_plp = n_plp; *_tid = iter->tid; *_pos = iter->pos;
+ // update iter->tid and iter->pos
+ if (iter->head->next) {
+ if (iter->tid > iter->head->b.core.tid) {
+ fprintf(stderr, "[%s] unsorted input. Pileup aborts.\n", __func__);
+ *_n_plp = -1;
+ return 0;
+ }
+ }
+ if (iter->tid < iter->head->b.core.tid) { // come to a new reference sequence
+ iter->tid = iter->head->b.core.tid; iter->pos = iter->head->beg; // jump to the next reference
+ } else if (iter->pos < iter->head->beg) { // here: tid == head->b.core.tid
+ iter->pos = iter->head->beg; // jump to the next position
+ } else ++iter->pos; // scan contiguously
+ // return
+ if (n_plp) return iter->plp;
+ if (iter->is_eof && iter->head->next == 0) break;
+ }
+ return 0;
}
-int bam_plbuf_push(const bam1_t *b, bam_plbuf_t *buf)
+int bam_plp_push(bam_plp_t iter, const bam1_t *b)
{
- if (b) { // fill buffer
+ if (b) {
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) {
+ if (b->core.flag & iter->flag_mask) return 0;
+ bam_copy1(&iter->tail->b, b);
+ iter->tail->beg = b->core.pos; iter->tail->end = bam_calend(&b->core, bam1_cigar(b));
+ if (b->core.tid < iter->max_tid) {
fprintf(stderr, "[bam_pileup_core] the input is not sorted (chromosomes out of order)\n");
return -1;
}
- if ((b->core.tid == buf->max_tid) && (buf->tail->beg < buf->max_pos)) {
+ if ((b->core.tid == iter->max_tid) && (iter->tail->beg < iter->max_pos)) {
fprintf(stderr, "[bam_pileup_core] the input is not sorted (reads out of order)\n");
return -1;
}
- 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
- }
+ iter->max_tid = b->core.tid; iter->max_pos = iter->tail->beg;
+ if (iter->tail->end > iter->pos || iter->tail->b.core.tid > iter->tid) {
+ iter->tail->next = mp_alloc(iter->mp);
+ iter->tail = iter->tail->next;
}
- 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;
- }
+ } else iter->is_eof = 1;
return 0;
}
+void bam_plp_reset(bam_plp_t iter)
+{
+ lbnode_t *p, *q;
+ iter->max_tid = iter->max_pos = -1;
+ iter->tid = iter->pos = 0;
+ iter->is_eof = 0;
+ for (p = iter->head; p->next;) {
+ q = p->next;
+ mp_free(iter->mp, p);
+ p = q;
+ }
+ iter->head = iter->tail;
+}
+
+void bam_plp_set_mask(bam_plp_t iter, int mask)
+{
+ iter->flag_mask = mask < 0? BAM_DEF_MASK : (BAM_FUNMAP | mask);
+}
+
+void bam_plp_destroy(bam_plp_t iter)
+{
+ mp_free(iter->mp, iter->dummy);
+ mp_free(iter->mp, iter->head);
+ if (iter->mp->cnt != 0)
+ fprintf(stderr, "[bam_plp_destroy] memory leak: %d. Continue anyway.\n", iter->mp->cnt);
+ mp_destroy(iter->mp);
+ free(iter->plp);
+ free(iter);
+}
+
+/*****************
+ * callback APIs *
+ *****************/
+
int bam_pileup_file(bamFile fp, int mask, bam_pileup_f func, void *func_data)
{
bam_plbuf_t *buf;
bam_destroy1(b);
return 0;
}
+
+void bam_plbuf_set_mask(bam_plbuf_t *buf, int mask)
+{
+ bam_plp_set_mask(buf->iter, mask);
+}
+
+void bam_plbuf_reset(bam_plbuf_t *buf)
+{
+ bam_plp_reset(buf->iter);
+}
+
+bam_plbuf_t *bam_plbuf_init(bam_pileup_f func, void *data)
+{
+ bam_plbuf_t *buf;
+ buf = calloc(1, sizeof(bam_plbuf_t));
+ buf->iter = bam_plp_init();
+ buf->func = func;
+ buf->data = data;
+ return buf;
+}
+
+void bam_plbuf_destroy(bam_plbuf_t *buf)
+{
+ bam_plp_destroy(buf->iter);
+ free(buf);
+}
+
+int bam_plbuf_push(const bam1_t *b, bam_plbuf_t *buf)
+{
+ int ret, n_plp, tid, pos;
+ const bam_pileup1_t *plp;
+ ret = bam_plp_push(buf->iter, b);
+ if (ret < 0) return ret;
+ while ((plp = bam_plp_next(buf->iter, &n_plp, &tid, &pos)) != 0)
+ buf->func(tid, pos, n_plp, plp, buf->data);
+ return 0;
+}
projects / samtools.git / commitdiff