// File: /workspace/github_c_makefile_star2_O3/c-zhou[P]yahs/bamlite.c
// Function: bam_header_read
bam_header_t *bam_header_read(bamFile fp)
{
    bam_header_t *header;
    char buf[4];
    int magic_len;
    int32_t i = 1, name_len;
    // read "BAM1"
    magic_len = bam_read(fp, buf, 4);
    if (magic_len != 4 || strncmp(buf, "BAM\001", 4) != 0) {
        fprintf(stderr, "[bam_header_read] invalid BAM binary header (this is not a BAM file).\n");
        return NULL;
    }
    header = bam_header_init();
    // read plain text and the number of reference sequences
    if (bam_read(fp, &header->l_text, 4) != 4) goto fail; 
    if (bam_is_be) bam_swap_endian_4p(&header->l_text);
    header->text = (char*)calloc(header->l_text + 1, 1);
    if (bam_read(fp, header->text, header->l_text) != header->l_text) goto fail;
    if (bam_read(fp, &header->n_targets, 4) != 4) goto fail;
    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) {
        if (bam_read(fp, &name_len, 4) != 4) goto fail;
        if (bam_is_be) bam_swap_endian_4p(&name_len);
        header->target_name[i] = (char*)calloc(name_len, 1);
        if (bam_read(fp, header->target_name[i], name_len) != name_len) {
            goto fail;
        }
        if (bam_read(fp, &header->target_len[i], 4) != 4) goto fail;
        if (bam_is_be) bam_swap_endian_4p(&header->target_len[i]);
    }
    return header;
 fail:
    bam_header_destroy(header);
    return NULL;
}

// Assembly:
pushq %rbp
pushq %r15
pushq %r14
pushq %r13
pushq %r12
pushq %rbx
pushq %rax
movq %rdi, %rbx
leaq 0x4(%rsp), %rsi
movl $0x4, %edx
callq 0x5171
cmpl $0x4, %eax
jne 0x5072
cmpl $0x14d4142, 0x4(%rsp)   # imm = 0x14D4142
jne 0x5072
movl $0x0, 0x27641(%rip)     # 0x2c614
movl $0x1, %edi
movl $0x30, %esi
callq 0x2290
movq %rax, %r14
movq %rax, %r15
addq $0x18, %r15
movq %rbx, %rdi
movq %r15, %rsi
movl $0x4, %edx
callq 0x5171
cmpl $0x4, %eax
jne 0x5154
cmpl $0x0, 0x27608(%rip)     # 0x2c614
je 0x5016
movl (%r15), %eax
bswapl %eax
movl %eax, (%r15)
movq 0x18(%r14), %r15
leaq 0x1(%r15), %rdi
movl $0x1, %esi
callq 0x2290
movq %rax, 0x28(%r14)
movq %rbx, %rdi
movq %rax, %rsi
movl %r15d, %edx
callq 0x5171
cltq
cmpq %rax, 0x18(%r14)
jne 0x5154
movq %rbx, %rdi
movq %r14, %rsi
movl $0x4, %edx
callq 0x5171
cmpl $0x4, %eax
jne 0x5154
cmpl $0x0, 0x275ae(%rip)     # 0x2c614
je 0x507c
movl (%r14), %eax
bswapl %eax
movl %eax, (%r14)
jmp 0x507f
callq 0x25da
jmp 0x515c
movl (%r14), %eax
movslq %eax, %r15
movl $0x8, %esi
movq %r15, %rdi
callq 0x2290
movq %rax, 0x8(%r14)
movl $0x4, %esi
movq %r15, %rdi
callq 0x2290
movq %rax, 0x10(%r14)
testl %r15d, %r15d
je 0x515f
xorl %r13d, %r13d
movq %rsp, %r15
xorl %ebp, %ebp
movq %rbx, %rdi
movq %r15, %rsi
movl $0x4, %edx
callq 0x5171
cmpl $0x4, %eax
jne 0x5154
cmpl $0x0, 0x2753f(%rip)     # 0x2c614
movl (%rsp), %eax
je 0x50df
bswapl %eax
movl %eax, (%rsp)
movslq %eax, %r12
movl $0x1, %esi
movq %r12, %rdi
callq 0x2290
movq 0x8(%r14), %rcx
movq %rax, (%rcx,%r13,2)
movq 0x8(%r14), %rax
movq (%rax,%r13,2), %rsi
movq %rbx, %rdi
movl %r12d, %edx
callq 0x5171
cmpl (%rsp), %eax
jne 0x5154
movq 0x10(%r14), %rsi
addq %r13, %rsi
movq %rbx, %rdi
movl $0x4, %edx
callq 0x5171
cmpl $0x4, %eax
jne 0x5154
cmpl $0x0, 0x274e5(%rip)     # 0x2c614
je 0x513f
movq 0x10(%r14), %rax
movl (%rax,%r13), %ecx
bswapl %ecx
movl %ecx, (%rax,%r13)
incq %rbp
movl (%r14), %eax
addq $0x4, %r13
cmpq %rax, %rbp
jne 0x50b5
jmp 0x515f
movq %r14, %rdi
callq 0x4f25
xorl %r14d, %r14d
movq %r14, %rax
addq $0x8, %rsp
popq %rbx
popq %r12
popq %r13
popq %r14
popq %r15
popq %rbp
retq