# Unit tests harness
# Read suite name from stdin, then run that suite

.org 0
# Provide program starting address to linker
.global _start

# .extern fmt_decimal

/* newlib system calls */
.set SYSEXIT,  93
.set SYSREAD, 63
.set SYSWRITE, 64

.section .rodata

inputs:
    .word 0, 1, 2, 3, 9, 10, 100, 0x80000000
inputs_end:

.section .bss

buf: .skip 11
inbuf: .skip 80

.text

_start:
    la a0, inbuf
    li a1, 80
    jal read

    mv a2, a0           # move bytes read to a2
    li t0, SYSWRITE     # "write" syscall
    li a0, 1            # 1 = standard output (stdout)
    la a1, inbuf        # load address of buffer
    ecall               # invoke syscall to print the string

    li t0, SYSEXIT      # "exit" syscall
    la a0, 0            # Use 0 return code
    ecall               # invoke syscall to terminate the program


# Read from stdin
#    arguments:
#       a0: address of buffer to read into
#       a1: number of bytes to read
#    return:
#       a0: count of bytes read, or error if < 0

read:
    li t0, SYSREAD      # "read" syscall
    mv a2, a1           # bytes to read
    mv a1, a0           # buffer address
    li a0, 1            # 0 = standard input (stdin)
    ecall               # invoke syscall
    ret