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-rw-r--r--src/bin/fspec/dump.c838
1 files changed, 838 insertions, 0 deletions
diff --git a/src/bin/fspec/dump.c b/src/bin/fspec/dump.c
new file mode 100644
index 0000000..07a6757
--- /dev/null
+++ b/src/bin/fspec/dump.c
@@ -0,0 +1,838 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <limits.h>
+#include <string.h>
+#include <assert.h>
+#include <err.h>
+
+#include <iconv.h>
+#include <errno.h>
+#include <locale.h>
+#include <langinfo.h>
+#include <squash.h>
+
+#include <fspec/bcode.h>
+#include <fspec/lexer.h>
+#include <fspec/validator.h>
+#include "util/membuf.h"
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+
+#if 0
+
+static size_t
+to_hex(const uint8_t *buf, const size_t buf_sz, char *out, const size_t out_sz, const bool reverse)
+{
+ assert(out);
+ const char nibble[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+ const uint8_t nbs = sizeof(nibble) - 1;
+
+ size_t w = 0, last_non_zero = w;
+ for (size_t i = 0; i < buf_sz && out_sz > 2 && w < out_sz - 2; ++i) {
+ for (uint8_t c = 0; c < CHAR_BIT / 8 && w < out_sz; ++c) {
+ const size_t idx = (reverse ? (buf_sz - 1) - i : i);
+ const uint8_t hi = (buf[idx] >> (4 * (c + 1))) & nbs;
+ const uint8_t lo = (buf[idx] >> (8 * c)) & nbs;
+
+ if (w || hi || lo) {
+ out[w++] = nibble[hi];
+ out[w++] = nibble[lo];
+ last_non_zero = (hi || lo ? w : last_non_zero);
+ }
+ }
+ }
+
+ if (!w) {
+ out[w++] = nibble[0];
+ out[w++] = nibble[0];
+ } else {
+ w = last_non_zero;
+ }
+
+ assert(w < out_sz);
+ out[w] = 0;
+ return w;
+}
+
+static void
+print_dec(const uint8_t *buf, const size_t size, const bool is_signed)
+{
+ char hex[2 * sizeof(fspec_num) + 1];
+ to_hex(buf, size, hex, sizeof(hex), true);
+
+ static_assert(sizeof(fspec_num) <= sizeof(uint64_t), "fspec_num is larger than uint64_t");
+
+ if (is_signed) {
+ printf("%ld", (int64_t)strtoll(hex, NULL, 16));
+ } else {
+ printf("%lu", (uint64_t)strtoull(hex, NULL, 16));
+ }
+}
+
+static void
+print_udec(const uint8_t *buf, const size_t size)
+{
+ print_dec(buf, size, false);
+}
+
+static void
+print_sdec(const uint8_t *buf, const size_t size)
+{
+ print_dec(buf, size, true);
+}
+
+static void
+print_hex(const uint8_t *buf, const size_t size)
+{
+ char hex[2 * sizeof(fspec_num) + 1];
+ to_hex(buf, size, hex, sizeof(hex), true);
+ printf("0x%s", hex);
+}
+
+static void
+print_array(const uint8_t *buf, const size_t size, const size_t nmemb, void (*fun)(const uint8_t *buf, const size_t size))
+{
+ const int indent = 4;
+ if (nmemb > 8) {
+ printf("{\n%*s", indent, "");
+ } else if (nmemb > 1) {
+ printf("{ ");
+ }
+
+ for (size_t n = 0; n < nmemb; ++n) {
+ fun(buf + n * size, size);
+ printf("%s", (nmemb > 1 && n + 1 < nmemb ? ", " : ""));
+
+ if (n + 1 < nmemb && !((n + 1) % 8))
+ printf("\n%*s", indent, "");
+ }
+
+ printf("%s\n", (nmemb > 8 ? "\n}" : (nmemb > 1 ? " }" : "")));
+}
+
+static void
+print_str(const char *buf, const size_t size, const size_t nmemb)
+{
+ const bool has_nl = memchr(buf, '\n', size * nmemb);
+ if (has_nl)
+ puts("```");
+
+ for (size_t n = 0; n < size * nmemb && buf[n] != 0; ++n)
+ printf("%c", buf[n]);
+
+ puts((has_nl ? "```" : ""));
+}
+
+struct code {
+ const enum fspec_op *start, *end, *data;
+};
+
+static void
+dump_ops(const struct code *code)
+{
+ for (const enum fspec_op *op = code->start; op; op = fspec_op_next(op, code->end, false)) {
+ printf("%*s- ", (*op == FSPEC_OP_ARG ? 2 : 0), "");
+ switch (*op) {
+ case FSPEC_OP_HEADER:
+ printf("header\n");
+ break;
+
+ case FSPEC_OP_DECLARATION:
+ printf("declaration\n");
+ break;
+
+ case FSPEC_OP_READ:
+ printf("read\n");
+ break;
+
+ case FSPEC_OP_GOTO:
+ printf("goto\n");
+ break;
+
+ case FSPEC_OP_FILTER:
+ printf("filter\n");
+ break;
+
+ case FSPEC_OP_VISUAL:
+ printf("visual\n");
+ break;
+
+ case FSPEC_OP_ARG:
+ {
+ const enum fspec_arg *arg = (void*)(op + 1);
+ printf("arg ");
+ switch (*arg) {
+ case FSPEC_ARG_STR:
+ printf("str %s\n", fspec_arg_get_cstr(arg, code->data));
+ break;
+
+ case FSPEC_ARG_VAR:
+ printf("var %" PRI_FSPEC_NUM "\n", fspec_arg_get_num(arg));
+ break;
+
+ case FSPEC_ARG_NUM:
+ printf("num %" PRI_FSPEC_NUM "\n", fspec_arg_get_num(arg));
+ break;
+
+ case FSPEC_ARG_OFF:
+ printf("off %" PRI_FSPEC_NUM "\n", fspec_arg_get_num(arg));
+ break;
+
+ case FSPEC_ARG_DAT:
+ printf("dat %" PRI_FSPEC_NUM "\n", fspec_arg_get_num(arg));
+ break;
+
+ case FSPEC_ARG_EOF:
+ printf("eof\n");
+ break;
+
+ case FSPEC_ARG_LAST:
+ break;
+ }
+ }
+ break;
+
+ case FSPEC_OP_LAST:
+ break;
+ }
+ }
+}
+
+static const enum fspec_op*
+get_last_struct(const struct code *code)
+{
+ const enum fspec_op *last = NULL;
+ for (const enum fspec_op *op = code->start; op; op = fspec_op_next(op, code->end, true)) {
+ const enum fspec_arg *arg;
+ if (*op == FSPEC_OP_DECLARATION &&
+ (arg = fspec_op_get_arg(op, code->end, 1, 1<<FSPEC_ARG_NUM)) &&
+ fspec_arg_get_num(arg) == FSPEC_DECLARATION_STRUCT) {
+ last = op;
+ }
+ }
+ return last;
+}
+
+struct dynbuf {
+ void *data;
+ size_t len, written;
+};
+
+static inline void
+dynbuf_resize(struct dynbuf *buf, const size_t size)
+{
+ assert(buf);
+ if (!(buf->data = realloc(buf->data, size)))
+ err(EXIT_FAILURE, "realloc(%zu)", size);
+
+ buf->len = size;
+}
+
+static inline void
+dynbuf_resize_if_needed(struct dynbuf *buf, const size_t size)
+{
+ if (buf->len >= size)
+ return;
+
+ dynbuf_resize(buf, size);
+}
+
+static inline void
+dynbuf_grow_if_needed(struct dynbuf *buf, const size_t nmemb)
+{
+ assert(buf);
+ if (buf->len >= nmemb && buf->written <= buf->len - nmemb)
+ return;
+
+ dynbuf_resize(buf, buf->written + nmemb);
+}
+
+static inline void
+dynbuf_append(struct dynbuf *buf, const void *data, const size_t data_sz)
+{
+ dynbuf_grow_if_needed(buf, data_sz);
+ memcpy((char*)buf->data + buf->written, data, data_sz);
+ buf->written += data_sz;
+ assert(buf->written <= buf->len);
+}
+
+static inline void
+dynbuf_reset(struct dynbuf *buf)
+{
+ assert(buf);
+ buf->written = 0;
+}
+
+static inline void
+dynbuf_release(struct dynbuf *buf)
+{
+ assert(buf);
+ free(buf->data);
+ *buf = (struct dynbuf){0};
+}
+
+static void
+display(const void *buf, const size_t size, const size_t nmemb, const bool is_signed, const enum fspec_visual visual)
+{
+ switch (visual) {
+ case FSPEC_VISUAL_NUL:
+ puts("...");
+ break;
+
+ case FSPEC_VISUAL_STR:
+ print_str(buf, size, nmemb);
+ break;
+
+ case FSPEC_VISUAL_HEX:
+ print_array(buf, size, nmemb, print_hex);
+ break;
+
+ case FSPEC_VISUAL_DEC:
+ print_array(buf, size, nmemb, (is_signed ? print_sdec : print_udec));
+ break;
+
+ case FSPEC_VISUAL_LAST:
+ break;
+ }
+}
+
+struct decl {
+ struct dynbuf buf;
+ const char *name;
+ const void *start, *end;
+ size_t nmemb;
+ uint8_t size;
+ enum fspec_visual visual;
+ enum fspec_declaration declaration;
+};
+
+static void
+decl_display(const struct decl *decl)
+{
+ assert(decl);
+ assert(decl->size * decl->nmemb <= decl->buf.len);
+ printf("%s: ", decl->name);
+ display(decl->buf.data, decl->size, decl->nmemb, false, decl->visual);
+}
+
+static fspec_num
+decl_get_num(const struct decl *decl)
+{
+ assert(decl);
+ assert(decl->nmemb == 1);
+ assert(decl->size * decl->nmemb <= decl->buf.len);
+ char hex[2 * sizeof(fspec_num) + 1];
+ to_hex(decl->buf.data, decl->size, hex, sizeof(hex), true);
+ static_assert(sizeof(fspec_num) <= sizeof(uint64_t), "fspec_num is larger than uint64_t");
+ return (fspec_num)strtoull(hex, NULL, 16);
+}
+
+static const char*
+decl_get_cstr(const struct decl *decl)
+{
+ assert(decl);
+ return decl->buf.data;
+}
+
+struct context {
+ struct code code;
+ struct decl *decl;
+ fspec_num decl_count;
+};
+
+static fspec_num
+var_get_num(const struct context *context, const enum fspec_arg *arg)
+{
+ assert(context && arg);
+ return decl_get_num(&context->decl[fspec_arg_get_num(arg)]);
+}
+
+static const char*
+var_get_cstr(const struct context *context, const enum fspec_arg *arg)
+{
+ assert(context && arg);
+ return decl_get_cstr(&context->decl[fspec_arg_get_num(arg)]);
+}
+
+enum type {
+ TYPE_NUM,
+ TYPE_STR,
+};
+
+static enum type
+var_get_type(const struct context *context, const enum fspec_arg *arg)
+{
+ assert(context && arg);
+ const struct decl *decl = &context->decl[fspec_arg_get_num(arg)];
+ switch (decl->visual) {
+ case FSPEC_VISUAL_DEC:
+ case FSPEC_VISUAL_HEX:
+ case FSPEC_VISUAL_NUL:
+ return TYPE_NUM;
+
+ case FSPEC_VISUAL_STR:
+ return TYPE_STR;
+
+ case FSPEC_VISUAL_LAST:
+ break;
+ }
+ return ~0;
+}
+
+static void
+filter_decompress(const struct context *context, struct decl *decl)
+{
+ assert(decl);
+
+ const enum fspec_arg *arg;
+ if (!(arg = fspec_op_get_arg(context->code.start, context->code.end, 2, 1<<FSPEC_ARG_STR)))
+ errx(EXIT_FAILURE, "missing compression");
+
+ SquashCodec *codec;
+ const char *algo = fspec_arg_get_cstr(arg, context->code.data);
+ if (!(codec = squash_get_codec(algo)))
+ errx(EXIT_FAILURE, "unknown compression '%s'", algo);
+
+ SquashOptions *opts;
+ if (!(opts = squash_options_new(codec, NULL)))
+ errx(EXIT_FAILURE, "squash_options_new");
+
+ size_t dsize = squash_codec_get_uncompressed_size(codec, decl->buf.len, decl->buf.data);
+ dsize = (dsize ? dsize : decl->buf.len * 2);
+
+ {
+ const enum fspec_arg *var = arg;
+ if ((arg = fspec_arg_next(arg, context->code.end, 1, 1<<FSPEC_ARG_NUM | 1<<FSPEC_ARG_VAR))) {
+ var = arg;
+
+ switch (*var) {
+ case FSPEC_ARG_NUM:
+ dsize = fspec_arg_get_num(arg);
+ break;
+
+ case FSPEC_ARG_VAR:
+ dsize = var_get_num(context, arg);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ for (; (var = fspec_arg_next(var, context->code.end, 1, 1<<FSPEC_ARG_STR));) {
+ const char *key = fspec_arg_get_cstr(var, context->code.data);
+ if (!(var = fspec_arg_next(var, context->code.end, 1, ~0)))
+ errx(EXIT_FAILURE, "expected argument for key '%s'", key);
+
+ switch (*var) {
+ case FSPEC_ARG_STR:
+ squash_options_set_string(opts, key, fspec_arg_get_cstr(var, context->code.data));
+ break;
+
+ case FSPEC_ARG_NUM:
+ squash_options_set_int(opts, key, fspec_arg_get_num(var));
+ break;
+
+ case FSPEC_ARG_VAR:
+ if (var_get_type(context, var) == TYPE_STR) {
+ squash_options_set_string(opts, key, var_get_cstr(context, var));
+ } else {
+ squash_options_set_int(opts, key, var_get_num(context, var));
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ // what a horrible api
+ squash_object_ref(opts);
+
+ SquashStatus r;
+ struct dynbuf buf = {0};
+ dynbuf_resize(&buf, dsize);
+ while ((r = squash_codec_decompress_with_options(codec, &buf.len, buf.data, decl->buf.len, decl->buf.data, opts)) == SQUASH_BUFFER_FULL)
+ dynbuf_resize(&buf, dsize *= 2);
+
+ dynbuf_resize_if_needed(&buf, (buf.written = buf.len));
+ squash_object_unref(opts);
+
+ if (r != SQUASH_OK)
+ errx(EXIT_FAILURE, "squash_codec_decompress(%zu, %zu) = %d: %s", dsize, decl->buf.len, r, squash_status_to_string(r));
+
+ dynbuf_release(&decl->buf);
+ decl->buf = buf;
+ decl->nmemb = buf.len / decl->size;
+}
+
+static void
+filter_decode(const struct context *context, struct decl *decl)
+{
+ assert(decl);
+
+ const enum fspec_arg *arg;
+ if (!(arg = fspec_op_get_arg(context->code.start, context->code.end, 2, 1<<FSPEC_ARG_STR)))
+ errx(EXIT_FAILURE, "missing encoding");
+
+ const char *encoding = fspec_arg_get_cstr(arg, context->code.data);
+
+ static const char *sys_encoding;
+ if (!sys_encoding) {
+ setlocale(LC_ALL, "");
+ sys_encoding = nl_langinfo(CODESET);
+ }
+
+ iconv_t iv;
+ if ((iv = iconv_open(sys_encoding, encoding)) == (iconv_t)-1)
+ err(EXIT_FAILURE, "iconv_open(%s, %s)", sys_encoding, encoding);
+
+ struct dynbuf buf = {0};
+ const uint8_t *in = decl->buf.data;
+ size_t in_left = decl->buf.written;
+ do {
+ char enc[1024], *out = enc;
+ size_t out_left = sizeof(enc);
+
+ errno = 0;
+ if (iconv(iv, (char**)&in, &in_left, &out, &out_left) == (size_t)-1 && errno != E2BIG)
+ err(EXIT_FAILURE, "iconv(%s, %s)", sys_encoding, encoding);
+
+ dynbuf_append(&buf, enc, sizeof(enc) - out_left);
+ } while (in_left > 0);
+
+ iconv_close(iv);
+
+ dynbuf_release(&decl->buf);
+ decl->buf = buf;
+ decl->nmemb = buf.len / decl->size;
+}
+
+static void
+call(const struct context *context, FILE *f)
+{
+ assert(context && f);
+
+ struct decl *decl = NULL;
+ for (const enum fspec_op *op = context->code.start; op; op = fspec_op_next(op, context->code.end, true)) {
+ if (decl && op == decl->end) {
+ decl_display(decl);
+ decl = NULL;
+ }
+
+ switch (*op) {
+ case FSPEC_OP_DECLARATION:
+ {
+ const enum fspec_arg *arg;
+ arg = fspec_op_get_arg(op, context->code.end, 2, 1<<FSPEC_ARG_NUM);
+ decl = &context->decl[fspec_arg_get_num(arg)];
+ dynbuf_reset(&decl->buf);
+ }
+ break;
+
+ case FSPEC_OP_READ:
+ {
+ assert(decl);
+ const enum fspec_arg *arg = fspec_op_get_arg(op, context->code.end, 1, 1<<FSPEC_ARG_NUM);
+ static_assert(CHAR_BIT == 8, "doesn't work otherwere right now");
+ decl->size = fspec_arg_get_num(arg) / 8;
+ decl->nmemb = 0;
+
+ for (const enum fspec_arg *var = arg; (var = fspec_arg_next(var, context->code.end, 1, ~0));) {
+ switch (*var) {
+ case FSPEC_ARG_NUM:
+ case FSPEC_ARG_VAR:
+ {
+ const fspec_num v = (*var == FSPEC_ARG_NUM ? fspec_arg_get_num(var) : var_get_num(context, var));
+ if (v == 0) {
+ goto noop;
+ } else if (v > 1) {
+ const size_t nmemb = (decl->nmemb ? decl->nmemb : 1) * v;
+ dynbuf_grow_if_needed(&decl->buf, decl->size * nmemb);
+ const size_t read = fread((char*)decl->buf.data + decl->buf.written, decl->size, nmemb, f);
+ decl->buf.written += decl->size * read;
+ decl->nmemb += read;
+ }
+ }
+ break;
+
+ case FSPEC_ARG_STR:
+ break;
+
+ case FSPEC_ARG_EOF:
+ {
+ const size_t nmemb = (decl->nmemb ? decl->nmemb : 1);
+ size_t read = 0, r = nmemb;
+ while (r == nmemb) {
+ dynbuf_grow_if_needed(&decl->buf, decl->size * nmemb);
+ read += (r = fread((char*)decl->buf.data + decl->buf.written, decl->size, nmemb, f));
+ decl->buf.written += decl->size * r;
+ };
+ decl->nmemb += read;
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+noop:
+
+ if (!fspec_arg_next(arg, context->code.end, 1, ~0)) {
+ dynbuf_grow_if_needed(&decl->buf, decl->size * 1);
+ const size_t read = fread((char*)decl->buf.data + decl->buf.written, decl->size, 1, f);
+ decl->buf.written += decl->size * read;
+ decl->nmemb = read;
+ }
+
+ assert(decl->nmemb != 0);
+ }
+ break;
+
+ case FSPEC_OP_GOTO:
+ {
+ decl = NULL;
+ const enum fspec_arg *arg = fspec_op_get_arg(op, context->code.end, 1, 1<<FSPEC_ARG_VAR);
+ const struct decl *d = &context->decl[fspec_arg_get_num(arg)];
+ struct context c = *context;
+ c.code.start = d->start;
+ c.code.end = d->end;
+
+ for (const enum fspec_arg *var = arg; (var = fspec_arg_next(var, context->code.end, 1, ~0));) {
+ switch (*var) {
+ case FSPEC_ARG_NUM:
+ case FSPEC_ARG_VAR:
+ {
+ const fspec_num v = (*var == FSPEC_ARG_NUM ? fspec_arg_get_num(var) : var_get_num(context, var));
+ for (fspec_num i = 0; i < v; ++i)
+ call(&c, f);
+ }
+ break;
+
+ // XXX: How to handle STR with stdin?
+ // With fseek would be easy.
+ case FSPEC_ARG_STR:
+ break;
+
+ case FSPEC_ARG_EOF:
+ while (!feof(f))
+ call(&c, f);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (!fspec_arg_next(arg, context->code.end, 1, ~0))
+ call(&c, f);
+ }
+ break;
+
+ case FSPEC_OP_FILTER:
+ {
+ assert(decl);
+ const enum fspec_arg *arg = fspec_op_get_arg(op, context->code.end, 1, 1<<FSPEC_ARG_STR);
+
+ const struct {
+ const char *name;
+ void (*fun)(const struct context*, struct decl*);
+ } map[] = {
+ { .name = "encoding", .fun = filter_decode },
+ { .name = "compression", .fun = filter_decompress },
+ };
+
+ const char *filter = fspec_arg_get_cstr(arg, context->code.data);
+ for (size_t i = 0; i < ARRAY_SIZE(map); ++i) {
+ if (!strcmp(filter, map[i].name)) {
+ struct context c = *context;
+ c.code.start = op;
+ map[i].fun(&c, decl);
+ break;
+ }
+
+ if (i == ARRAY_SIZE(map) - 1)
+ warnx("unknown filter '%s'", filter);
+ }
+ }
+ break;
+
+ case FSPEC_OP_VISUAL:
+ {
+ assert(decl);
+ const enum fspec_arg *arg = fspec_op_get_arg(op, context->code.end, 1, 1<<FSPEC_ARG_NUM);
+ decl->visual = fspec_arg_get_num(arg);
+ }
+ break;
+
+ case FSPEC_OP_ARG:
+ case FSPEC_OP_HEADER:
+ case FSPEC_OP_LAST:
+ break;
+ }
+ }
+
+ if (decl && context->code.end == decl->end)
+ decl_display(decl);
+}
+
+static void
+setup(const struct context *context)
+{
+ assert(context);
+
+ for (const enum fspec_op *op = context->code.start; op; op = fspec_op_next(op, context->code.end, true)) {
+ switch (*op) {
+ case FSPEC_OP_DECLARATION:
+ {
+ const enum fspec_arg *arg[4];
+ arg[0] = fspec_op_get_arg(op, context->code.end, 1, 1<<FSPEC_ARG_NUM);
+ arg[1] = fspec_arg_next(arg[0], context->code.end, 1, 1<<FSPEC_ARG_NUM);
+ arg[2] = fspec_arg_next(arg[1], context->code.end, 1, 1<<FSPEC_ARG_OFF);
+ arg[3] = fspec_arg_next(arg[2], context->code.end, 1, 1<<FSPEC_ARG_STR);
+ const fspec_num id = fspec_arg_get_num(arg[1]);
+ struct decl *decl = &context->decl[id];
+ decl->declaration = fspec_arg_get_num(arg[0]);
+ decl->name = fspec_arg_get_cstr(arg[3], context->code.data);
+ decl->visual = FSPEC_VISUAL_DEC;
+ decl->start = op;
+ decl->end = (char*)op + fspec_arg_get_num(arg[2]);
+ assert(!decl->buf.data);
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+
+static void
+execute(const struct fspec_mem *mem)
+{
+ assert(mem);
+
+ struct context context = {
+ .code.start = mem->data,
+ .code.end = (void*)((char*)mem->data + mem->len),
+ .code.data = mem->data
+ };
+
+ printf("output: %zu bytes\n", mem->len);
+ dump_ops(&context.code);
+
+ const enum fspec_arg *arg = fspec_op_get_arg(context.code.data, context.code.end, 2, 1<<FSPEC_ARG_NUM);
+ context.decl_count = fspec_arg_get_num(arg);
+
+ if (!(context.decl = calloc(context.decl_count, sizeof(*context.decl))))
+ err(EXIT_FAILURE, "calloc(%zu, %zu)", context.decl_count, sizeof(*context.decl));
+
+ setup(&context);
+
+ puts("\nexecution:");
+ context.code.start = get_last_struct(&context.code);
+ assert(context.code.start);
+ call(&context, stdin);
+
+ for (fspec_num i = 0; i < context.decl_count; ++i)
+ dynbuf_release(&context.decl[i].buf);
+
+ free(context.decl);
+}
+#endif
+
+static FILE*
+fopen_or_die(const char *path, const char *mode)
+{
+ assert(path && mode);
+
+ FILE *f;
+ if (!(f = fopen(path, mode)))
+ err(EXIT_FAILURE, "fopen(%s, %s)", path, mode);
+
+ return f;
+}
+
+#define container_of(ptr, type, member) ((type *)((char *)(1 ? (ptr) : &((type *)0)->member) - offsetof(type, member)))
+
+struct lexer {
+ struct fspec_lexer lexer;
+ struct membuf output;
+ FILE *file;
+};
+
+static size_t
+fspec_lexer_write(struct fspec_lexer *lexer, const enum fspec_lexer_section section, const void *output, const size_t size, const size_t nmemb)
+{
+ assert(lexer && output);
+ // struct lexer *l = container_of(lexer, struct lexer, lexer);
+ (void)lexer, (void)section, (void)size, (void)nmemb;
+ return nmemb;
+}
+
+static size_t
+fspec_lexer_read(struct fspec_lexer *lexer, void *input, const size_t size, const size_t nmemb)
+{
+ assert(lexer && input);
+ struct lexer *l = container_of(lexer, struct lexer, lexer);
+ return fread(input, size, nmemb, l->file);
+}
+
+#if 0
+static size_t
+fspec_validator_read(struct fspec_validator *validator, void *ptr, const size_t size, const size_t nmemb)
+{
+ assert(validator && ptr);
+ assert(ptr == validator->mem.input.data);
+ const size_t read = validator->mem.input.len / size;
+ assert((validator->mem.input.len && read == nmemb) || (!validator->mem.input.len && !read));
+ validator->mem.input.len -= read * size;
+ assert(validator->mem.input.len == 0);
+ return read;
+}
+#endif
+
+int
+main(int argc, const char *argv[])
+{
+ if (argc < 2)
+ errx(EXIT_FAILURE, "usage: %s file.spec < data", argv[0]);
+
+ char output[4096];
+
+ {
+ char input[4096];
+ struct lexer l = {
+ .lexer = {
+ .ops.read = fspec_lexer_read,
+ .ops.write = fspec_lexer_write,
+ .mem.input = { .data = input, .len = sizeof(input) },
+ },
+ .file = fopen_or_die(argv[1], "rb"),
+ .output.mem = { .data = output, .len = sizeof(output) },
+ };
+
+ if (!fspec_lexer_parse(&l.lexer, argv[1]))
+ exit(EXIT_FAILURE);
+
+ fclose(l.file);
+ // bcode = l.lexer.mem.output;
+ }
+
+#if 0
+
+ {
+ struct fspec_validator validator = {
+ .ops.read = fspec_validator_read,
+ .mem.input = bcode,
+ };
+
+ if (!fspec_validator_parse(&validator, argv[1]))
+ exit(EXIT_FAILURE);
+ }
+
+ execute(&bcode);
+#endif
+ return EXIT_SUCCESS;
+}