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#include <cstdlib> |
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#include <cstdio> |
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#include <cstring> |
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|
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#include "bam/bam.h" |
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#include "bam/sam.h" |
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#include "GBase.h" |
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#include "GList.hh" |
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|
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#define USAGE "Usage: bam_merge <out.bam> <in1.bam> <in2.bam> [...]\n" |
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|
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#define ERR_BAM_OPEN "Error: bam_merge failed to open BAM file %s\n" |
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|
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samfile_t **srcfiles; //array of SAM file handles |
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samfile_t *fw; //output SAM handle |
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|
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class CBamLine { |
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public: |
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int fileno; |
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long read_id; |
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bam1_t* b; |
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bool operator==(CBamLine& l){ |
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return (read_id==l.read_id); |
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} |
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bool operator>(CBamLine& l){ |
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return (read_id<l.read_id); //(last has lowest #) |
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} |
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bool operator<(CBamLine& l){ |
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return (read_id>l.read_id); |
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} |
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CBamLine(int fno=-1, bam1_t* br=NULL) { |
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fileno=fno; |
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read_id=0; |
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b=br; |
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b_init(); |
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} |
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void b_init() { |
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if (b) { |
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char *name = bam1_qname(b); |
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read_id=atol(name); |
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if (read_id<1) { |
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char* samline=bam_format1(srcfiles[0]->header, b); |
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GError("Error: invalid read Id (must be numeric) for BAM record:\n%s\n", |
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samline); |
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} |
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} |
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} |
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|
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void b_free() { |
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if (b!=NULL) { bam_destroy1(b); } |
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} |
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}; |
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|
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GList<CBamLine> lines(true,true,false); |
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|
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int main(int argc, char *argv[]) |
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{ |
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char* outfname=NULL; |
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if (argc<4) { |
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fprintf(stderr, USAGE); |
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if (argc>1) |
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fprintf(stderr, "Error: only %d arguments given.\n", argc-1); |
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return -1; |
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} |
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outfname=argv[1]; |
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int num_src=argc-2; |
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GMALLOC(srcfiles, (num_src*sizeof(samfile_t*))); |
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for (int i=2;i<argc;i++) { |
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int fno=i-2; |
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samfile_t* fp=samopen(argv[i], "rb", 0); |
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if (fp==0) { |
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fprintf(stderr, ERR_BAM_OPEN, argv[i]); |
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return 1; |
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} |
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bam1_t *b = bam_init1(); |
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if (samread(fp, b) > 0) { |
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srcfiles[fno]=fp; |
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lines.Add(new CBamLine(fno, b)); |
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} |
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} |
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if (lines.Count()==0) { |
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GMessage("Warning: no input BAM records found.\n"); |
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} |
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fw=samopen(outfname, "wb", srcfiles[lines[0]->fileno]->header); |
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if (fw==NULL) |
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GError("Error creating output file %s\n", outfname); |
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int last; |
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while ((last=lines.Count()-1)>=0) { |
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CBamLine* from=lines[last]; //should have the smallest read_id |
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if (from->fileno<0 || from->b==NULL) |
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GError("Invalid processTopLine() call with uninitialized value."); |
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samwrite(fw, from->b); |
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if (samread(srcfiles[from->fileno], from->b)>0) { |
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from->b_init(); |
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//adjust the position in the sorted lines list |
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if (last<7) {// |
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int i=last; |
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while (i>0 && lines[i-1]->read_id<lines[i]->read_id) { |
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//swap |
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CBamLine* tmp=lines[i-1]; |
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lines.Put(i-1, lines[i], false); |
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lines.Put(i,tmp, false); |
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i--; |
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} |
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} |
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else { //use quick-insert |
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lines.Pop(); |
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lines.Add(from); |
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} |
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} |
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else { //no more BAM records |
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lines.Pop(); |
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from->b_free(); |
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} |
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} |
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samclose(fw); |
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for (int i=0;i<num_src;i++) |
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samclose(srcfiles[i]); |
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GFREE(srcfiles); |
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return 0; |
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} |
