#include <stdio.h> #include <sys/stat.h> #define ENCODE #define VERBOSE #include "nrv2b.c" FILE *infile, *outfile; #define DEBUG 0 struct input_file { void *buf; size_t len; }; struct output_file { void *buf; size_t len; size_t max_len; }; struct zinfo_common { char type[4]; char pad[12]; }; struct zinfo_copy { char type[4]; uint32_t offset; uint32_t len; uint32_t align; }; struct zinfo_pack { char type[4]; uint32_t offset; uint32_t len; uint32_t align; }; struct zinfo_add { char type[4]; uint32_t offset; uint32_t divisor; uint32_t pad; }; union zinfo_record { struct zinfo_common common; struct zinfo_copy copy; struct zinfo_pack pack; struct zinfo_add add; }; struct zinfo_file { union zinfo_record *zinfo; unsigned int num_entries; }; static unsigned long align ( unsigned long value, unsigned long align ) { return ( ( value + align - 1 ) & ~( align - 1 ) ); } static int read_file ( const char *filename, void **buf, size_t *len ) { FILE *file; struct stat stat; file = fopen ( filename, "r" ); if ( ! file ) { fprintf ( stderr, "Could not open %s: %s\n", filename, strerror ( errno ) ); goto err; } if ( fstat ( fileno ( file ), &stat ) < 0 ) { fprintf ( stderr, "Could not stat %s: %s\n", filename, strerror ( errno ) ); goto err; } *len = stat.st_size; *buf = malloc ( *len ); if ( ! *buf ) { fprintf ( stderr, "Could not malloc() %zd bytes for %s: %s\n", *len, filename, strerror ( errno ) ); goto err; } if ( fread ( *buf, 1, *len, file ) != *len ) { fprintf ( stderr, "Could not read %zd bytes from %s: %s\n", *len, filename, strerror ( errno ) ); goto err; } fclose ( file ); return 0; err: if ( file ) fclose ( file ); return -1; } static int read_input_file ( const char *filename, struct input_file *input ) { return read_file ( filename, &input->buf, &input->len ); } static int read_zinfo_file ( const char *filename, struct zinfo_file *zinfo ) { void *buf; size_t len; if ( read_file ( filename, &buf, &len ) < 0 ) return -1; if ( ( len % sizeof ( *(zinfo->zinfo) ) ) != 0 ) { fprintf ( stderr, ".zinfo file %s has invalid length %zd\n", filename, len ); return -1; } zinfo->zinfo = buf; zinfo->num_entries = ( len / sizeof ( *(zinfo->zinfo) ) ); return 0; } static int alloc_output_file ( size_t max_len, struct output_file *output ) { output->len = 0; output->max_len = ( max_len ); output->buf = malloc ( max_len ); if ( ! output->buf ) { fprintf ( stderr, "Could not allocate %zd bytes for output\n", max_len ); return -1; } memset ( output->buf, 0xff, sizeof ( output->buf ) ); return 0; } static int process_zinfo_copy ( struct input_file *input, struct output_file *output, union zinfo_record *zinfo ) { struct zinfo_copy *copy = &zinfo->copy; size_t offset = copy->offset; size_t len = copy->len; if ( ( offset + len ) > input->len ) { fprintf ( stderr, "Input buffer overrun on copy\n" ); return -1; } output->len = align ( output->len, copy->align ); if ( ( output->len + len ) > output->max_len ) { fprintf ( stderr, "Output buffer overrun on copy\n" ); return -1; } if ( DEBUG ) { fprintf ( stderr, "COPY [%#zx,%#zx) to [%#zx,%#zx)\n", offset, ( offset + len ), output->len, ( output->len + len ) ); } memcpy ( ( output->buf + output->len ), ( input->buf + offset ), len ); output->len += len; return 0; } static int process_zinfo_pack ( struct input_file *input, struct output_file *output, union zinfo_record *zinfo ) { struct zinfo_pack *pack = &zinfo->pack; size_t offset = pack->offset; size_t len = pack->len; unsigned long packed_len; if ( ( offset + len ) > input->len ) { fprintf ( stderr, "Input buffer overrun on pack\n" ); return -1; } output->len = align ( output->len, pack->align ); if ( output->len > output->max_len ) { fprintf ( stderr, "Output buffer overrun on pack\n" ); return -1; } if ( ucl_nrv2b_99_compress ( ( input->buf + offset ), len, ( output->buf + output->len ), &packed_len, 0 ) != UCL_E_OK ) { fprintf ( stderr, "Compression failure\n" ); return -1; } if ( DEBUG ) { fprintf ( stderr, "PACK [%#zx,%#zx) to [%#zx,%#zx)\n", offset, ( offset + len ), output->len, ( size_t )( output->len + packed_len ) ); } output->len += packed_len; if ( output->len > output->max_len ) { fprintf ( stderr, "Output buffer overrun on pack\n" ); return -1; } return 0; } static int process_zinfo_add ( struct input_file *input, struct output_file *output, struct zinfo_add *add, size_t datasize ) { size_t offset = add->offset; void *target; signed long addend; unsigned long size; signed long val; unsigned long mask; if ( ( offset + datasize ) > output->len ) { fprintf ( stderr, "Add at %#zx outside output buffer\n", offset ); return -1; } target = ( output->buf + offset ); size = ( align ( output->len, add->divisor ) / add->divisor ); switch ( datasize ) { case 1: addend = *( ( int8_t * ) target ); break; case 2: addend = *( ( int16_t * ) target ); break; case 4: addend = *( ( int32_t * ) target ); break; default: fprintf ( stderr, "Unsupported add datasize %zd\n", datasize ); return -1; } val = size + addend; /* The result of 1UL << ( 8 * sizeof(unsigned long) ) is undefined */ mask = ( ( datasize < sizeof ( mask ) ) ? ( ( 1UL << ( 8 * datasize ) ) - 1 ) : ~0UL ); if ( val < 0 ) { fprintf ( stderr, "Add %s%#x+%#lx at %#zx %sflows field\n", ( ( addend < 0 ) ? "-" : "" ), abs ( addend ), size, offset, ( ( addend < 0 ) ? "under" : "over" ) ); return -1; } if ( val & ~mask ) { fprintf ( stderr, "Add %s%#x+%#lx at %#zx overflows %zd-byte " "field (%d bytes too big)\n", ( ( addend < 0 ) ? "-" : "" ), abs ( addend ), size, offset, datasize, ( int )( ( val - mask - 1 ) * add->divisor ) ); return -1; } switch ( datasize ) { case 1: *( ( uint8_t * ) target ) = val; break; case 2: *( ( uint16_t * ) target ) = val; break; case 4: *( ( uint32_t * ) target ) = val; break; } if ( DEBUG ) { fprintf ( stderr, "ADDx [%#zx,%#zx) (%s%#x+(%#zx/%#x)) = " "%#lx\n", offset, ( offset + datasize ), ( ( addend < 0 ) ? "-" : "" ), abs ( addend ), output->len, add->divisor, val ); } return 0; } static int process_zinfo_addb ( struct input_file *input, struct output_file *output, union zinfo_record *zinfo ) { return process_zinfo_add ( input, output, &zinfo->add, 1 ); } static int process_zinfo_addw ( struct input_file *input, struct output_file *output, union zinfo_record *zinfo ) { return process_zinfo_add ( input, output, &zinfo->add, 2 ); } static int process_zinfo_addl ( struct input_file *input, struct output_file *output, union zinfo_record *zinfo ) { return process_zinfo_add ( input, output, &zinfo->add, 4 ); } struct zinfo_processor { char *type; int ( * process ) ( struct input_file *input, struct output_file *output, union zinfo_record *zinfo ); }; static struct zinfo_processor zinfo_processors[] = { { "COPY", process_zinfo_copy }, { "PACK", process_zinfo_pack }, { "ADDB", process_zinfo_addb }, { "ADDW", process_zinfo_addw }, { "ADDL", process_zinfo_addl }, }; static int process_zinfo ( struct input_file *input, struct output_file *output, union zinfo_record *zinfo ) { struct zinfo_common *common = &zinfo->common; struct zinfo_processor *processor; char type[ sizeof ( common->type ) + 1 ] = ""; unsigned int i; strncat ( type, common->type, sizeof ( type ) - 1 ); for ( i = 0 ; i < ( sizeof ( zinfo_processors ) / sizeof ( zinfo_processors[0] ) ) ; i++ ) { processor = &zinfo_processors[i]; if ( strcmp ( processor->type, type ) == 0 ) return processor->process ( input, output, zinfo ); } fprintf ( stderr, "Unknown zinfo record type \"%s\"\n", &type[0] ); return -1; } static int write_output_file ( struct output_file *output ) { if ( fwrite ( output->buf, 1, output->len, stdout ) != output->len ) { fprintf ( stderr, "Could not write %zd bytes of output: %s\n", output->len, strerror ( errno ) ); return -1; } return 0; } int main ( int argc, char **argv ) { struct input_file input; struct output_file output; struct zinfo_file zinfo; unsigned int i; if ( argc != 3 ) { fprintf ( stderr, "Syntax: %s file.bin file.zinfo " "> file.zbin\n", argv[0] ); exit ( 1 ); } if ( read_input_file ( argv[1], &input ) < 0 ) exit ( 1 ); if ( read_zinfo_file ( argv[2], &zinfo ) < 0 ) exit ( 1 ); if ( alloc_output_file ( ( input.len * 4 ), &output ) < 0 ) exit ( 1 ); for ( i = 0 ; i < zinfo.num_entries ; i++ ) { if ( process_zinfo ( &input, &output, &zinfo.zinfo[i] ) < 0 ) exit ( 1 ); } if ( write_output_file ( &output ) < 0 ) exit ( 1 ); return 0; }