+++ /dev/null
-#include <zlib.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <assert.h>
-#ifdef _WIN32
-#include <fcntl.h>
-#endif
-#include "kstring.h"
-#include "bam.h"
-#include "sam_header.h"
-#include "kseq.h"
-#include "khash.h"
-
-KSTREAM_INIT(gzFile, gzread, 8192)
-KHASH_MAP_INIT_STR(ref, uint64_t)
-
-void bam_init_header_hash(bam_header_t *header);
-void bam_destroy_header_hash(bam_header_t *header);
-int32_t bam_get_tid(const bam_header_t *header, const char *seq_name);
-
-unsigned char bam_nt16_table[256] = {
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 1, 2, 4, 8, 15,15,15,15, 15,15,15,15, 15, 0 /*=*/,15,15,
- 15, 1,14, 2, 13,15,15, 4, 11,15,15,12, 15, 3,15,15,
- 15,15, 5, 6, 8,15, 7, 9, 15,10,15,15, 15,15,15,15,
- 15, 1,14, 2, 13,15,15, 4, 11,15,15,12, 15, 3,15,15,
- 15,15, 5, 6, 8,15, 7, 9, 15,10,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
- 15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15
-};
-
-unsigned short bam_char2flag_table[256] = {
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,BAM_FREAD1,BAM_FREAD2,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- BAM_FPROPER_PAIR,0,BAM_FMREVERSE,0, 0,BAM_FMUNMAP,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, BAM_FDUP,0,BAM_FQCFAIL,0, 0,0,0,0, 0,0,0,0,
- BAM_FPAIRED,0,BAM_FREVERSE,BAM_FSECONDARY, 0,BAM_FUNMAP,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
- 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0
-};
-
-char *bam_nt16_rev_table = "=ACMGRSVTWYHKDBN";
-
-struct __tamFile_t {
- gzFile fp;
- kstream_t *ks;
- kstring_t *str;
- uint64_t n_lines;
- int is_first;
-};
-
-char **__bam_get_lines(const char *fn, int *_n) // for bam_plcmd.c only
-{
- char **list = 0, *s;
- int n = 0, dret, m = 0;
- gzFile fp = (strcmp(fn, "-") == 0)? gzdopen(fileno(stdin), "r") : gzopen(fn, "r");
- kstream_t *ks;
- kstring_t *str;
- str = (kstring_t*)calloc(1, sizeof(kstring_t));
- ks = ks_init(fp);
- while (ks_getuntil(ks, '\n', str, &dret) > 0) {
- if (n == m) {
- m = m? m << 1 : 16;
- list = (char**)realloc(list, m * sizeof(char*));
- }
- if (str->s[str->l-1] == '\r')
- str->s[--str->l] = '\0';
- s = list[n++] = (char*)calloc(str->l + 1, 1);
- strcpy(s, str->s);
- }
- ks_destroy(ks);
- gzclose(fp);
- free(str->s); free(str);
- *_n = n;
- return list;
-}
-
-static bam_header_t *hash2header(const kh_ref_t *hash)
-{
- bam_header_t *header;
- khiter_t k;
- header = bam_header_init();
- header->n_targets = kh_size(hash);
- header->target_name = (char**)calloc(kh_size(hash), sizeof(char*));
- header->target_len = (uint32_t*)calloc(kh_size(hash), 4);
- for (k = kh_begin(hash); k != kh_end(hash); ++k) {
- if (kh_exist(hash, k)) {
- int i = (int)kh_value(hash, k);
- header->target_name[i] = (char*)kh_key(hash, k);
- header->target_len[i] = kh_value(hash, k)>>32;
- }
- }
- bam_init_header_hash(header);
- return header;
-}
-bam_header_t *sam_header_read2(const char *fn)
-{
- bam_header_t *header;
- int c, dret, ret, error = 0;
- gzFile fp;
- kstream_t *ks;
- kstring_t *str;
- kh_ref_t *hash;
- khiter_t k;
- if (fn == 0) return 0;
- fp = (strcmp(fn, "-") == 0)? gzdopen(fileno(stdin), "r") : gzopen(fn, "r");
- if (fp == 0) return 0;
- hash = kh_init(ref);
- ks = ks_init(fp);
- str = (kstring_t*)calloc(1, sizeof(kstring_t));
- while (ks_getuntil(ks, 0, str, &dret) > 0) {
- char *s = strdup(str->s);
- int len, i;
- i = kh_size(hash);
- ks_getuntil(ks, 0, str, &dret);
- len = atoi(str->s);
- k = kh_put(ref, hash, s, &ret);
- if (ret == 0) {
- fprintf(stderr, "[sam_header_read2] duplicated sequence name: %s\n", s);
- error = 1;
- }
- kh_value(hash, k) = (uint64_t)len<<32 | i;
- if (dret != '\n')
- while ((c = ks_getc(ks)) != '\n' && c != -1);
- }
- ks_destroy(ks);
- gzclose(fp);
- free(str->s); free(str);
- fprintf(stderr, "[sam_header_read2] %d sequences loaded.\n", kh_size(hash));
- if (error) return 0;
- header = hash2header(hash);
- kh_destroy(ref, hash);
- return header;
-}
-static inline uint8_t *alloc_data(bam1_t *b, int size)
-{
- if (b->m_data < size) {
- b->m_data = size;
- kroundup32(b->m_data);
- b->data = (uint8_t*)realloc(b->data, b->m_data);
- }
- return b->data;
-}
-static inline void parse_error(int64_t n_lines, const char * __restrict msg)
-{
- fprintf(stderr, "Parse error at line %lld: %s\n", (long long)n_lines, msg);
- abort();
-}
-static inline void append_text(bam_header_t *header, kstring_t *str)
-{
- size_t x = header->l_text, y = header->l_text + str->l + 2; // 2 = 1 byte dret + 1 byte null
- kroundup32(x); kroundup32(y);
- if (x < y)
- {
- header->n_text = y;
- header->text = (char*)realloc(header->text, y);
- if ( !header->text )
- {
- fprintf(stderr,"realloc failed to alloc %ld bytes\n", y);
- abort();
- }
- }
- // Sanity check
- if ( header->l_text+str->l+1 >= header->n_text )
- {
- fprintf(stderr,"append_text FIXME: %ld>=%ld, x=%ld,y=%ld\n", header->l_text+str->l+1,header->n_text,x,y);
- abort();
- }
- strncpy(header->text + header->l_text, str->s, str->l+1); // we cannot use strcpy() here.
- header->l_text += str->l + 1;
- header->text[header->l_text] = 0;
-}
-
-int sam_header_parse(bam_header_t *h)
-{
- char **tmp;
- int i;
- free(h->target_len); free(h->target_name);
- h->n_targets = 0; h->target_len = 0; h->target_name = 0;
- if (h->l_text < 3) return 0;
- if (h->dict == 0) h->dict = sam_header_parse2(h->text);
- tmp = sam_header2list(h->dict, "SQ", "SN", &h->n_targets);
- if (h->n_targets == 0) return 0;
- h->target_name = calloc(h->n_targets, sizeof(void*));
- for (i = 0; i < h->n_targets; ++i)
- h->target_name[i] = strdup(tmp[i]);
- free(tmp);
- tmp = sam_header2list(h->dict, "SQ", "LN", &h->n_targets);
- h->target_len = calloc(h->n_targets, 4);
- for (i = 0; i < h->n_targets; ++i)
- h->target_len[i] = atoi(tmp[i]);
- free(tmp);
- return h->n_targets;
-}
-
-bam_header_t *sam_header_read(tamFile fp)
-{
- int ret, dret;
- bam_header_t *header = bam_header_init();
- kstring_t *str = fp->str;
- while ((ret = ks_getuntil(fp->ks, KS_SEP_TAB, str, &dret)) >= 0 && str->s[0] == '@') { // skip header
- str->s[str->l] = dret; // note that str->s is NOT null terminated!!
- append_text(header, str);
- if (dret != '\n') {
- ret = ks_getuntil(fp->ks, '\n', str, &dret);
- str->s[str->l] = '\n'; // NOT null terminated!!
- append_text(header, str);
- }
- ++fp->n_lines;
- }
- sam_header_parse(header);
- bam_init_header_hash(header);
- fp->is_first = 1;
- return header;
-}
-
-int sam_read1(tamFile fp, bam_header_t *header, bam1_t *b)
-{
- int ret, doff, doff0, dret, z = 0;
- bam1_core_t *c = &b->core;
- kstring_t *str = fp->str;
- kstream_t *ks = fp->ks;
-
- if (fp->is_first) {
- fp->is_first = 0;
- ret = str->l;
- } else {
- do { // special consideration for empty lines
- ret = ks_getuntil(fp->ks, KS_SEP_TAB, str, &dret);
- if (ret >= 0) z += str->l + 1;
- } while (ret == 0);
- }
- if (ret < 0) return -1;
- ++fp->n_lines;
- doff = 0;
-
- { // name
- c->l_qname = strlen(str->s) + 1;
- memcpy(alloc_data(b, doff + c->l_qname) + doff, str->s, c->l_qname);
- doff += c->l_qname;
- }
- { // flag
- long flag;
- char *s;
- ret = ks_getuntil(ks, KS_SEP_TAB, str, &dret); z += str->l + 1;
- flag = strtol((char*)str->s, &s, 0);
- if (*s) { // not the end of the string
- flag = 0;
- for (s = str->s; *s; ++s)
- flag |= bam_char2flag_table[(int)*s];
- }
- c->flag = flag;
- }
- { // tid, pos, qual
- ret = ks_getuntil(ks, KS_SEP_TAB, str, &dret); z += str->l + 1; c->tid = bam_get_tid(header, str->s);
- if (c->tid < 0 && strcmp(str->s, "*")) {
- if (header->n_targets == 0) {
- fprintf(stderr, "[sam_read1] missing header? Abort!\n");
- exit(1);
- } else fprintf(stderr, "[sam_read1] reference '%s' is recognized as '*'.\n", str->s);
- }
- ret = ks_getuntil(ks, KS_SEP_TAB, str, &dret); z += str->l + 1; c->pos = isdigit(str->s[0])? atoi(str->s) - 1 : -1;
- ret = ks_getuntil(ks, KS_SEP_TAB, str, &dret); z += str->l + 1; c->qual = isdigit(str->s[0])? atoi(str->s) : 0;
- if (ret < 0) return -2;
- }
- { // cigar
- char *s, *t;
- int i, op;
- long x;
- c->n_cigar = 0;
- if (ks_getuntil(ks, KS_SEP_TAB, str, &dret) < 0) return -3;
- z += str->l + 1;
- if (str->s[0] != '*') {
- for (s = str->s; *s; ++s) {
- if (isalpha(*s)) ++c->n_cigar;
- else if (!isdigit(*s)) parse_error(fp->n_lines, "invalid CIGAR character");
- }
- b->data = alloc_data(b, doff + c->n_cigar * 4);
- for (i = 0, s = str->s; i != c->n_cigar; ++i) {
- x = strtol(s, &t, 10);
- op = toupper(*t);
- if (op == 'M' || op == '=' || op == 'X') op = BAM_CMATCH;
- else if (op == 'I') op = BAM_CINS;
- else if (op == 'D') op = BAM_CDEL;
- else if (op == 'N') op = BAM_CREF_SKIP;
- else if (op == 'S') op = BAM_CSOFT_CLIP;
- else if (op == 'H') op = BAM_CHARD_CLIP;
- else if (op == 'P') op = BAM_CPAD;
- else parse_error(fp->n_lines, "invalid CIGAR operation");
- s = t + 1;
- bam1_cigar(b)[i] = x << BAM_CIGAR_SHIFT | op;
- }
- if (*s) parse_error(fp->n_lines, "unmatched CIGAR operation");
- c->bin = bam_reg2bin(c->pos, bam_calend(c, bam1_cigar(b)));
- doff += c->n_cigar * 4;
- } else {
- if (!(c->flag&BAM_FUNMAP)) {
- fprintf(stderr, "Parse warning at line %lld: mapped sequence without CIGAR\n", (long long)fp->n_lines);
- c->flag |= BAM_FUNMAP;
- }
- c->bin = bam_reg2bin(c->pos, c->pos + 1);
- }
- }
- { // mtid, mpos, isize
- ret = ks_getuntil(ks, KS_SEP_TAB, str, &dret); z += str->l + 1;
- c->mtid = strcmp(str->s, "=")? bam_get_tid(header, str->s) : c->tid;
- ret = ks_getuntil(ks, KS_SEP_TAB, str, &dret); z += str->l + 1;
- c->mpos = isdigit(str->s[0])? atoi(str->s) - 1 : -1;
- ret = ks_getuntil(ks, KS_SEP_TAB, str, &dret); z += str->l + 1;
- c->isize = (str->s[0] == '-' || isdigit(str->s[0]))? atoi(str->s) : 0;
- if (ret < 0) return -4;
- }
- { // seq and qual
- int i;
- uint8_t *p = 0;
- if (ks_getuntil(ks, KS_SEP_TAB, str, &dret) < 0) return -5; // seq
- z += str->l + 1;
- if (strcmp(str->s, "*")) {
- c->l_qseq = strlen(str->s);
- if (c->n_cigar && c->l_qseq != (int32_t)bam_cigar2qlen(c, bam1_cigar(b)))
- parse_error(fp->n_lines, "CIGAR and sequence length are inconsistent");
- p = (uint8_t*)alloc_data(b, doff + c->l_qseq + (c->l_qseq+1)/2) + doff;
- memset(p, 0, (c->l_qseq+1)/2);
- for (i = 0; i < c->l_qseq; ++i)
- p[i/2] |= bam_nt16_table[(int)str->s[i]] << 4*(1-i%2);
- } else c->l_qseq = 0;
- if (ks_getuntil(ks, KS_SEP_TAB, str, &dret) < 0) return -6; // qual
- z += str->l + 1;
- if (strcmp(str->s, "*") && c->l_qseq != strlen(str->s))
- parse_error(fp->n_lines, "sequence and quality are inconsistent");
- p += (c->l_qseq+1)/2;
- if (strcmp(str->s, "*") == 0) for (i = 0; i < c->l_qseq; ++i) p[i] = 0xff;
- else for (i = 0; i < c->l_qseq; ++i) p[i] = str->s[i] - 33;
- doff += c->l_qseq + (c->l_qseq+1)/2;
- }
- doff0 = doff;
- if (dret != '\n' && dret != '\r') { // aux
- while (ks_getuntil(ks, KS_SEP_TAB, str, &dret) >= 0) {
- uint8_t *s, type, key[2];
- z += str->l + 1;
- if (str->l < 6 || str->s[2] != ':' || str->s[4] != ':')
- parse_error(fp->n_lines, "missing colon in auxiliary data");
- key[0] = str->s[0]; key[1] = str->s[1];
- type = str->s[3];
- s = alloc_data(b, doff + 3) + doff;
- s[0] = key[0]; s[1] = key[1]; s += 2; doff += 2;
- if (type == 'A' || type == 'a' || type == 'c' || type == 'C') { // c and C for backward compatibility
- s = alloc_data(b, doff + 2) + doff;
- *s++ = 'A'; *s = str->s[5];
- doff += 2;
- } else if (type == 'I' || type == 'i') {
- long long x;
- s = alloc_data(b, doff + 5) + doff;
- x = (long long)atoll(str->s + 5);
- if (x < 0) {
- if (x >= -127) {
- *s++ = 'c'; *(int8_t*)s = (int8_t)x;
- s += 1; doff += 2;
- } else if (x >= -32767) {
- *s++ = 's'; *(int16_t*)s = (int16_t)x;
- s += 2; doff += 3;
- } else {
- *s++ = 'i'; *(int32_t*)s = (int32_t)x;
- s += 4; doff += 5;
- if (x < -2147483648ll)
- fprintf(stderr, "Parse warning at line %lld: integer %lld is out of range.",
- (long long)fp->n_lines, x);
- }
- } else {
- if (x <= 255) {
- *s++ = 'C'; *s++ = (uint8_t)x;
- doff += 2;
- } else if (x <= 65535) {
- *s++ = 'S'; *(uint16_t*)s = (uint16_t)x;
- s += 2; doff += 3;
- } else {
- *s++ = 'I'; *(uint32_t*)s = (uint32_t)x;
- s += 4; doff += 5;
- if (x > 4294967295ll)
- fprintf(stderr, "Parse warning at line %lld: integer %lld is out of range.",
- (long long)fp->n_lines, x);
- }
- }
- } else if (type == 'f') {
- s = alloc_data(b, doff + 5) + doff;
- *s++ = 'f';
- *(float*)s = (float)atof(str->s + 5);
- s += 4; doff += 5;
- } else if (type == 'd') {
- s = alloc_data(b, doff + 9) + doff;
- *s++ = 'd';
- *(float*)s = (float)atof(str->s + 9);
- s += 8; doff += 9;
- } else if (type == 'Z' || type == 'H') {
- int size = 1 + (str->l - 5) + 1;
- if (type == 'H') { // check whether the hex string is valid
- int i;
- if ((str->l - 5) % 2 == 1) parse_error(fp->n_lines, "length of the hex string not even");
- for (i = 0; i < str->l - 5; ++i) {
- int c = toupper(str->s[5 + i]);
- if (!((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')))
- parse_error(fp->n_lines, "invalid hex character");
- }
- }
- s = alloc_data(b, doff + size) + doff;
- *s++ = type;
- memcpy(s, str->s + 5, str->l - 5);
- s[str->l - 5] = 0;
- doff += size;
- } else parse_error(fp->n_lines, "unrecognized type");
- if (dret == '\n' || dret == '\r') break;
- }
- }
- b->l_aux = doff - doff0;
- b->data_len = doff;
- return z;
-}
-
-tamFile sam_open(const char *fn)
-{
- tamFile fp;
- gzFile gzfp = (strcmp(fn, "-") == 0)? gzdopen(fileno(stdin), "rb") : gzopen(fn, "rb");
- if (gzfp == 0) return 0;
- fp = (tamFile)calloc(1, sizeof(struct __tamFile_t));
- fp->str = (kstring_t*)calloc(1, sizeof(kstring_t));
- fp->fp = gzfp;
- fp->ks = ks_init(fp->fp);
- return fp;
-}
-
-void sam_close(tamFile fp)
-{
- if (fp) {
- ks_destroy(fp->ks);
- gzclose(fp->fp);
- free(fp->str->s); free(fp->str);
- free(fp);
- }
-}
projects / pysam.git / blobdiff