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@@ -0,0 +1,325 @@
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1
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+#include <stdio.h>
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+#include <sys/stat.h>
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+
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+#define ENCODE
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+#define VERBOSE
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+#include "nrv2b.c"
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+FILE *infile, *outfile;
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+
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+struct input_file {
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+ void *buf;
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+ size_t len;
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+};
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+
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+struct output_file {
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+ void *buf;
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+ size_t len;
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+ size_t max_len;
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+};
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+
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+struct zinfo_common {
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+ char type[4];
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+ char pad[12];
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+};
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+
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+struct zinfo_copy {
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+ char type[4];
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+ uint32_t offset;
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+ uint32_t len;
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+ uint32_t align;
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+};
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+
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+struct zinfo_pack {
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+ char type[4];
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+ uint32_t offset;
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+ uint32_t len;
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+ uint32_t align;
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+};
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+
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+struct zinfo_subtract {
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+ char type[4];
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+ uint32_t offset;
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+ uint32_t divisor;
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+ uint32_t pad;
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+};
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+
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+union zinfo_record {
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+ struct zinfo_common common;
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+ struct zinfo_copy copy;
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+ struct zinfo_pack pack;
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+ struct zinfo_subtract subtract;
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+};
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+
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+struct zinfo_file {
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+ union zinfo_record *zinfo;
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+ unsigned int num_entries;
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+};
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+
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+static int read_file ( const char *filename, void **buf, size_t *len ) {
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+ FILE *file;
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+ struct stat stat;
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+
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+ file = fopen ( filename, "r" );
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+ if ( ! file ) {
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+ fprintf ( stderr, "Could not open %s: %s\n", filename,
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+ strerror ( errno ) );
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+ goto err;
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+ }
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+
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+ if ( fstat ( fileno ( file ), &stat ) < 0 ) {
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+ fprintf ( stderr, "Could not stat %s: %s\n", filename,
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+ strerror ( errno ) );
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+ goto err;
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+ }
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+
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+ *len = stat.st_size;
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+ *buf = malloc ( *len );
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+ if ( ! *buf ) {
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+ fprintf ( stderr, "Could not malloc() %d bytes for %s: %s\n",
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+ *len, filename, strerror ( errno ) );
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+ goto err;
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+ }
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+
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+ if ( fread ( *buf, 1, *len, file ) != *len ) {
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+ fprintf ( stderr, "Could not read %d bytes from %s: %s\n",
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+ *len, filename, strerror ( errno ) );
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+ goto err;
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+ }
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+
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+ fclose ( file );
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+ return 0;
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+
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+ err:
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+ fclose ( file );
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+ return -1;
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+}
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+
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+static int read_input_file ( const char *filename,
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+ struct input_file *input ) {
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+ return read_file ( filename, &input->buf, &input->len );
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+}
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+
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+static int read_zinfo_file ( const char *filename,
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+ struct zinfo_file *zinfo ) {
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+ void *buf;
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+ size_t len;
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+
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+ if ( read_file ( filename, &buf, &len ) < 0 )
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+ return -1;
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+
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+ if ( ( len % sizeof ( *(zinfo->zinfo) ) ) != 0 ) {
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+ fprintf ( stderr, ".zinfo file %s has invalid length %d\n",
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+ filename, len );
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+ return -1;
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+ }
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+
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+ zinfo->zinfo = buf;
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+ zinfo->num_entries = ( len / sizeof ( *(zinfo->zinfo) ) );
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+ return 0;
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+}
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+
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+static int alloc_output_file ( size_t max_len, struct output_file *output ) {
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+ output->len = 0;
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+ output->max_len = ( max_len );
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+ output->buf = malloc ( max_len );
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+ if ( ! output->buf ) {
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+ fprintf ( stderr, "Could not allocate %d bytes for output\n",
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+ max_len );
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+ return -1;
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+ }
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+ memset ( output->buf, 0xff, sizeof ( output->buf ) );
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+ return 0;
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+}
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+
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+static int process_zinfo_copy ( struct input_file *input,
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+ struct output_file *output,
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+ union zinfo_record *zinfo ) {
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+ struct zinfo_copy *copy = &zinfo->copy;
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+ size_t offset = copy->offset;
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+ size_t len = copy->len;
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+ unsigned int align = copy->align;
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+
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+ if ( ( offset + len ) > input->len ) {
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+ fprintf ( stderr, "Input buffer overrun on copy\n" );
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+ return -1;
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+ }
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+
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+ output->len = ( ( output->len + align - 1 ) & ~( align - 1 ) );
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+ if ( ( output->len + len ) > output->max_len ) {
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+ fprintf ( stderr, "Output buffer overrun on copy\n" );
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+ return -1;
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+ }
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+
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+ memcpy ( ( output->buf + output->len ),
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+ ( input->buf + offset ), len );
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+ output->len += len;
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+ return 0;
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+}
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+
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+static int process_zinfo_pack ( struct input_file *input,
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+ struct output_file *output,
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+ union zinfo_record *zinfo ) {
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+ struct zinfo_pack *pack = &zinfo->pack;
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+ size_t offset = pack->offset;
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+ size_t len = pack->len;
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+ unsigned int align = pack->align;
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+ unsigned long packed_len;
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+
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+ if ( ( offset + len ) > input->len ) {
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+ fprintf ( stderr, "Input buffer overrun on pack\n" );
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+ return -1;
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+ }
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+
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+ output->len = ( ( output->len + align - 1 ) & ~( align - 1 ) );
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+ if ( output->len > output->max_len ) {
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+ fprintf ( stderr, "Output buffer overrun on pack\n" );
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+ return -1;
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+ }
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+
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+ if ( ucl_nrv2b_99_compress ( ( input->buf + offset ), len,
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+ ( output->buf + output->len ),
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+ &packed_len, 0 ) != UCL_E_OK ) {
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+ fprintf ( stderr, "Compression failure\n" );
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+ return -1;
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+ }
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+
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+ output->len += packed_len;
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+ if ( output->len > output->max_len ) {
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+ fprintf ( stderr, "Output buffer overrun on pack\n" );
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+ return -1;
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+ }
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191
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+
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+ return 0;
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+}
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+
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195
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+static int process_zinfo_subtract ( struct input_file *input,
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+ struct output_file *output,
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197
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+ struct zinfo_subtract *subtract,
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+ size_t datasize ) {
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+ size_t offset = subtract->offset;
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200
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+ void *target;
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201
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+ long delta;
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202
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+
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203
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+ if ( ( offset + datasize ) > output->len ) {
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204
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+ fprintf ( stderr, "Subtract at %#zx outside output buffer\n",
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205
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+ offset );
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+ return -1;
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+ }
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+
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209
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+ target = ( output->buf + offset );
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210
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+ delta = ( ( output->len / subtract->divisor ) -
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+ ( input->len / subtract->divisor ) );
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+
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213
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+ switch ( datasize ) {
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214
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+ case 1: {
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215
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+ uint8_t *byte = target;
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216
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+ *byte += delta;
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217
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+ break; }
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218
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+ case 2: {
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219
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+ uint16_t *word = target;
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220
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+ *word += delta;
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221
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+ break; }
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222
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+ case 4: {
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223
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+ uint32_t *dword = target;
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224
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+ *dword += delta;
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225
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+ break; }
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226
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+ default:
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227
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+ fprintf ( stderr, "Unsupported subtract datasize %d\n",
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228
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+ datasize );
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229
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+ return -1;
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230
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+ }
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231
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+ return 0;
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232
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+}
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233
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+
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234
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+static int process_zinfo_subb ( struct input_file *input,
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235
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+ struct output_file *output,
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236
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+ union zinfo_record *zinfo ) {
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237
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+ return process_zinfo_subtract ( input, output, &zinfo->subtract, 1 );
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238
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+}
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239
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+
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240
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+static int process_zinfo_subw ( struct input_file *input,
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241
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+ struct output_file *output,
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242
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+ union zinfo_record *zinfo ) {
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243
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+ return process_zinfo_subtract ( input, output, &zinfo->subtract, 2 );
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244
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+}
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245
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+
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246
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+static int process_zinfo_subl ( struct input_file *input,
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247
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+ struct output_file *output,
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248
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+ union zinfo_record *zinfo ) {
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249
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+ return process_zinfo_subtract ( input, output, &zinfo->subtract, 4 );
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250
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+}
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251
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+
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252
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+struct zinfo_processor {
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253
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+ char *type;
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254
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+ int ( * process ) ( struct input_file *input,
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255
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+ struct output_file *output,
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256
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+ union zinfo_record *zinfo );
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257
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+};
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258
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+
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259
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+static struct zinfo_processor zinfo_processors[] = {
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260
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+ { "COPY", process_zinfo_copy },
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261
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+ { "PACK", process_zinfo_pack },
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262
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+ { "SUBB", process_zinfo_subb },
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263
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+ { "SUBW", process_zinfo_subw },
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264
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+ { "SUBL", process_zinfo_subl },
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265
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+};
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266
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+
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267
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+static int process_zinfo ( struct input_file *input,
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268
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+ struct output_file *output,
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269
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+ union zinfo_record *zinfo ) {
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270
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+ struct zinfo_common *common = &zinfo->common;
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271
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+ struct zinfo_processor *processor;
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272
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+ char type[ sizeof ( common->type ) + 1 ] = "";
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273
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+ unsigned int i;
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274
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+
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275
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+ strncat ( type, common->type, sizeof ( type ) - 1 );
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276
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+ for ( i = 0 ; i < ( sizeof ( zinfo_processors ) /
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277
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+ sizeof ( zinfo_processors[0] ) ) ; i++ ) {
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278
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+ processor = &zinfo_processors[i];
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279
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+ if ( strcmp ( processor->type, type ) == 0 )
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280
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+ return processor->process ( input, output, zinfo );
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281
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+ }
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282
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+
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283
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+ fprintf ( stderr, "Unknown zinfo record type \"%s\"\n", &type[0] );
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284
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+ return -1;
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285
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+}
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286
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+
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287
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+static int write_output_file ( struct output_file *output ) {
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288
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+ if ( fwrite ( output->buf, 1, output->len, stdout ) != output->len ) {
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289
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+ fprintf ( stderr, "Could not write %d bytes of output: %s\n",
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290
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+ output->len, strerror ( errno ) );
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291
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+ return -1;
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|
292
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+ }
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|
293
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+ return 0;
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294
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+}
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295
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+
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296
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+int main ( int argc, char **argv ) {
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297
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+ struct input_file input;
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298
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+ struct output_file output;
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299
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+ struct zinfo_file zinfo;
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300
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+ unsigned int i;
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301
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+
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302
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+ if ( argc != 3 ) {
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303
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+ fprintf ( stderr, "Syntax: %s file.bin file.zinfo "
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304
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+ "> file.zbin\n", argv[0] );
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305
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+ exit ( 1 );
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306
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+ }
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307
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+
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308
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+ if ( read_input_file ( argv[1], &input ) < 0 )
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309
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+ exit ( 1 );
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310
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+ if ( read_zinfo_file ( argv[2], &zinfo ) < 0 )
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311
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+ exit ( 1 );
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312
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+ if ( alloc_output_file ( ( input.len * 4 ), &output ) < 0 )
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313
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+ exit ( 1 );
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314
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+
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315
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+ for ( i = 0 ; i < zinfo.num_entries ; i++ ) {
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316
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+ if ( process_zinfo ( &input, &output,
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317
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+ &zinfo.zinfo[i] ) < 0 )
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318
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+ exit ( 1 );
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|
319
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+ }
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|
320
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+
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321
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+ if ( write_output_file ( &output ) < 0 )
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322
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+ exit ( 1 );
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|
323
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+
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324
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+ return 0;
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325
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+}
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Michael Brown
17 lat temu