diff options
Diffstat (limited to 'src/bin/fspec')
| -rw-r--r-- | src/bin/fspec/dump.c | 838 |
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; +} |