10 static int g_is_by_qname = 0;
12 static inline int strnum_cmp(const char *a, const char *b)
15 pa = (char*)a; pb = (char*)b;
17 if (isdigit(*pa) && isdigit(*pb)) {
19 ai = strtol(pa, &pa, 10);
20 bi = strtol(pb, &pb, 10);
21 if (ai != bi) return ai<bi? -1 : ai>bi? 1 : 0;
23 if (*pa != *pb) break;
28 return (pa-a) < (pb-b)? -1 : (pa-a) > (pb-b)? 1 : 0;
29 return *pa<*pb? -1 : *pa>*pb? 1 : 0;
32 #define HEAP_EMPTY 0xffffffffffffffffull
40 #define __pos_cmp(a, b) ((a).pos > (b).pos || ((a).pos == (b).pos && ((a).i > (b).i || ((a).i == (b).i && (a).idx > (b).idx))))
42 static inline int heap_lt(const heap1_t a, const heap1_t b)
46 if (a.b == 0 || b.b == 0) return a.b == 0? 1 : 0;
47 t = strnum_cmp(bam1_qname(a.b), bam1_qname(b.b));
48 return (t > 0 || (t == 0 && __pos_cmp(a, b)));
49 } else return __pos_cmp(a, b);
52 KSORT_INIT(heap, heap1_t, heap_lt)
54 static void swap_header_text(bam_header_t *h1, bam_header_t *h2)
58 tempi = h1->l_text, h1->l_text = h2->l_text, h2->l_text = tempi;
59 temps = h1->text, h1->text = h2->text, h2->text = temps;
63 @abstract Merge multiple sorted BAM.
64 @param is_by_qname whether to sort by query name
65 @param out output BAM file name
66 @param headers name of SAM file from which to copy '@' header lines,
67 or NULL to copy them from the first file to be merged
68 @param n number of files to be merged
69 @param fn names of files to be merged
71 @discussion Padding information may NOT correctly maintained. This
72 function is NOT thread safe.
74 void bam_merge_core(int by_qname, const char *out, const char *headers, int n, char * const *fn, int add_RG)
78 bam_header_t *hout = 0;
79 bam_header_t *hheaders = NULL;
80 int i, j, *RG_len = 0;
85 tamFile fpheaders = sam_open(headers);
87 fprintf(stderr, "[bam_merge_core] Cannot open file `%s'. Continue anyway.\n", headers);
89 hheaders = sam_header_read(fpheaders);
94 g_is_by_qname = by_qname;
95 fp = (bamFile*)calloc(n, sizeof(bamFile));
96 heap = (heap1_t*)calloc(n, sizeof(heap1_t));
99 RG = (char**)calloc(n, sizeof(void*));
100 RG_len = (int*)calloc(n, sizeof(int));
101 for (i = 0; i != n; ++i) {
102 int l = strlen(fn[i]);
103 const char *s = fn[i];
104 if (l > 4 && strcmp(s + l - 4, ".bam") == 0) l -= 4;
105 for (j = l - 1; j >= 0; --j) if (s[j] == '/') break;
107 RG[i] = calloc(l + 1, 1);
109 strncpy(RG[i], s + j, l);
113 for (i = 0; i != n; ++i) {
116 fp[i] = bam_open(fn[i], "r");
119 fprintf(stderr, "[bam_merge_core] fail to open file %s\n", fn[i]);
120 for (j = 0; j < i; ++j) bam_close(fp[j]);
121 free(fp); free(heap);
122 // FIXME: possible memory leak
125 hin = bam_header_read(fp[i]);
126 if (i == 0) { // the first SAM
129 // If the text headers to be swapped in include any @SQ headers,
130 // check that they are consistent with the existing binary list
131 // of reference information.
132 if (hheaders->n_targets > 0) {
133 if (hout->n_targets != hheaders->n_targets)
134 fprintf(stderr, "[bam_merge_core] number of @SQ headers in `%s' differs from number of target sequences", headers);
135 for (j = 0; j < hout->n_targets; ++j)
136 if (strcmp(hout->target_name[j], hheaders->target_name[j]) != 0)
137 fprintf(stderr, "[bam_merge_core] @SQ header '%s' in '%s' differs from target sequence", hheaders->target_name[j], headers);
139 swap_header_text(hout, hheaders);
140 bam_header_destroy(hheaders);
143 } else { // validate multiple baf
144 if (hout->n_targets != hin->n_targets) {
145 fprintf(stderr, "[bam_merge_core] file '%s' has different number of target sequences. Abort!\n", fn[i]);
148 for (j = 0; j < hout->n_targets; ++j) {
149 if (strcmp(hout->target_name[j], hin->target_name[j])) {
150 fprintf(stderr, "[bam_merge_core] different target sequence name: '%s' != '%s' in file '%s'. Abort!\n",
151 hout->target_name[j], hin->target_name[j], fn[i]);
155 bam_header_destroy(hin);
159 h->b = (bam1_t*)calloc(1, sizeof(bam1_t));
160 if (bam_read1(fp[i], h->b) >= 0) {
161 h->pos = ((uint64_t)h->b->core.tid<<32) | (uint32_t)h->b->core.pos<<1 | bam1_strand(h->b);
164 else h->pos = HEAP_EMPTY;
166 fpout = strcmp(out, "-")? bam_open(out, "w") : bam_dopen(fileno(stdout), "w");
168 bam_header_write(fpout, hout);
169 bam_header_destroy(hout);
171 ks_heapmake(heap, n, heap);
172 while (heap->pos != HEAP_EMPTY) {
174 if (add_RG && bam_aux_get(b, "RG") == 0)
175 bam_aux_append(b, "RG", 'Z', RG_len[heap->i] + 1, (uint8_t*)RG[heap->i]);
176 bam_write1_core(fpout, &b->core, b->data_len, b->data);
177 if ((j = bam_read1(fp[heap->i], b)) >= 0) {
178 heap->pos = ((uint64_t)b->core.tid<<32) | (uint32_t)b->core.pos<<1 | bam1_strand(b);
180 } else if (j == -1) {
181 heap->pos = HEAP_EMPTY;
182 free(heap->b->data); free(heap->b);
184 } else fprintf(stderr, "[bam_merge_core] '%s' is truncated. Continue anyway.\n", fn[heap->i]);
185 ks_heapadjust(heap, 0, n, heap);
189 for (i = 0; i != n; ++i) free(RG[i]);
190 free(RG); free(RG_len);
192 for (i = 0; i != n; ++i) bam_close(fp[i]);
194 free(fp); free(heap);
196 int bam_merge(int argc, char *argv[])
198 int c, is_by_qname = 0, add_RG = 0;
199 char *fn_headers = NULL;
201 while ((c = getopt(argc, argv, "h:nr")) >= 0) {
203 case 'r': add_RG = 1; break;
204 case 'h': fn_headers = strdup(optarg); break;
205 case 'n': is_by_qname = 1; break;
208 if (optind + 2 >= argc) {
209 fprintf(stderr, "\n");
210 fprintf(stderr, "Usage: samtools merge [-nr] [-h inh.sam] <out.bam> <in1.bam> <in2.bam> [...]\n\n");
211 fprintf(stderr, "Options: -n sort by read names\n");
212 fprintf(stderr, " -r attach RG tag (inferred from file names)\n");
213 fprintf(stderr, " -h FILE copy the header in FILE to <out.bam> [in1.bam]\n\n");
214 fprintf(stderr, "Note: Samtools' merge does not reconstruct the @RG dictionary in the header. Users\n");
215 fprintf(stderr, " must provide the correct header with -h, or uses Picard which properly maintains\n");
216 fprintf(stderr, " the header dictionary in merging.\n\n");
219 bam_merge_core(is_by_qname, argv[optind], fn_headers, argc - optind - 1, argv + optind + 1, add_RG);
224 typedef bam1_t *bam1_p;
226 static inline int bam1_lt(const bam1_p a, const bam1_p b)
229 int t = strnum_cmp(bam1_qname(a), bam1_qname(b));
230 return (t < 0 || (t == 0 && (((uint64_t)a->core.tid<<32|a->core.pos) < ((uint64_t)b->core.tid<<32|b->core.pos))));
231 } else return (((uint64_t)a->core.tid<<32|a->core.pos) < ((uint64_t)b->core.tid<<32|b->core.pos));
233 KSORT_INIT(sort, bam1_p, bam1_lt)
235 static void sort_blocks(int n, int k, bam1_p *buf, const char *prefix, const bam_header_t *h, int is_stdout)
240 ks_mergesort(sort, k, buf, 0);
241 name = (char*)calloc(strlen(prefix) + 20, 1);
242 if (n >= 0) sprintf(name, "%s.%.4d.bam", prefix, n);
243 else sprintf(name, "%s.bam", prefix);
244 fp = is_stdout? bam_dopen(fileno(stdout), "w") : bam_open(name, "w");
246 fprintf(stderr, "[sort_blocks] fail to create file %s.\n", name);
248 // FIXME: possible memory leak
252 bam_header_write(fp, h);
253 for (i = 0; i < k; ++i)
254 bam_write1_core(fp, &buf[i]->core, buf[i]->data_len, buf[i]->data);
259 @abstract Sort an unsorted BAM file based on the chromosome order
260 and the leftmost position of an alignment
262 @param is_by_qname whether to sort by query name
263 @param fn name of the file to be sorted
264 @param prefix prefix of the output and the temporary files; upon
265 sucessess, prefix.bam will be written.
266 @param max_mem approxiate maximum memory (very inaccurate)
268 @discussion It may create multiple temporary subalignment files
269 and then merge them by calling bam_merge_core(). This function is
272 void bam_sort_core_ext(int is_by_qname, const char *fn, const char *prefix, size_t max_mem, int is_stdout)
276 bam_header_t *header;
280 g_is_by_qname = is_by_qname;
282 fp = strcmp(fn, "-")? bam_open(fn, "r") : bam_dopen(fileno(stdin), "r");
284 fprintf(stderr, "[bam_sort_core] fail to open file %s\n", fn);
287 header = bam_header_read(fp);
288 buf = (bam1_t**)calloc(max_mem / BAM_CORE_SIZE, sizeof(bam1_t*));
291 if (buf[k] == 0) buf[k] = (bam1_t*)calloc(1, sizeof(bam1_t));
293 if ((ret = bam_read1(fp, b)) < 0) break;
296 if (mem >= max_mem) {
297 sort_blocks(n++, k, buf, prefix, header, 0);
302 fprintf(stderr, "[bam_sort_core] truncated file. Continue anyway.\n");
303 if (n == 0) sort_blocks(-1, k, buf, prefix, header, is_stdout);
306 fprintf(stderr, "[bam_sort_core] merging from %d files...\n", n+1);
307 sort_blocks(n++, k, buf, prefix, header, 0);
308 fnout = (char*)calloc(strlen(prefix) + 20, 1);
309 if (is_stdout) sprintf(fnout, "-");
310 else sprintf(fnout, "%s.bam", prefix);
311 fns = (char**)calloc(n, sizeof(char*));
312 for (i = 0; i < n; ++i) {
313 fns[i] = (char*)calloc(strlen(prefix) + 20, 1);
314 sprintf(fns[i], "%s.%.4d.bam", prefix, i);
316 bam_merge_core(is_by_qname, fnout, 0, n, fns, 0);
318 for (i = 0; i < n; ++i) {
324 for (k = 0; k < max_mem / BAM_CORE_SIZE; ++k) {
331 bam_header_destroy(header);
335 void bam_sort_core(int is_by_qname, const char *fn, const char *prefix, size_t max_mem)
337 bam_sort_core_ext(is_by_qname, fn, prefix, max_mem, 0);
340 int bam_sort(int argc, char *argv[])
342 size_t max_mem = 500000000;
343 int c, is_by_qname = 0, is_stdout = 0;
344 while ((c = getopt(argc, argv, "nom:")) >= 0) {
346 case 'o': is_stdout = 1; break;
347 case 'n': is_by_qname = 1; break;
348 case 'm': max_mem = atol(optarg); break;
351 if (optind + 2 > argc) {
352 fprintf(stderr, "Usage: samtools sort [-on] [-m <maxMem>] <in.bam> <out.prefix>\n");
355 bam_sort_core_ext(is_by_qname, argv[optind], argv[optind+1], max_mem, is_stdout);