247 lines
8.2 KiB
C
247 lines
8.2 KiB
C
// Copyright 2019 Lassi Kortela
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// SPDX-License-Identifier: BSD-3-Clause
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#include <sys/types.h>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <locale.h>
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#include <math.h>
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#include <setjmp.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wctype.h>
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#include "scheme.h"
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struct builtin_procedure {
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char *name;
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builtin_t fptr;
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uint32_t lib_id_mask;
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};
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struct builtin_library {
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char *path;
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uint32_t lib_id;
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};
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// R7RS libraries
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#define R7RS_BASE (1 << 0)
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#define R7RS_CHAR (1 << 1)
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#define R7RS_CXR (1 << 2)
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#define R7RS_FILE (1 << 3)
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#define R7RS_INEXACT (1 << 4)
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#define R7RS_PROCESS_CONTEXT (1 << 5)
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#define R7RS_READ (1 << 6)
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#define R7RS_WRITE (1 << 7)
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// SRFI libraries
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#define SRFI_0 (1 << 8)
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#define SRFI_13 (1 << 9) // String Libraries
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#define SRFI_170 (1 << 10) // POSIX API
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#define SRFI_175 (1 << 11) // ASCII character library
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#define SRFI_176 (1 << 11) // Version flag
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// Up Scheme libraries
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#define UP_2019 (1 << 20)
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const char *upscheme_stable_specs[] = { 0 };
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const char upscheme_unstable_spec[] = "2019";
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static struct builtin_procedure builtin_procedures[] = {
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#if 0
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{ "create-directory", fs_create_directory, SRFI_170 | UP_2019 },
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{ "file-info", fs_file_info, SRFI_170 | UP_2019 },
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{ "string-null?", string_null_p, SRFI_13, UP_2019 },
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{ "make-string", string_make_string, SRFI_13 | UP_2019 },
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#endif
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{ "features", builtin_features, R7RS_BASE | UP_2019 },
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{ "version-alist", builtin_version_alist, SRFI_176 | UP_2019 },
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{ "string?", fl_stringp, SRFI_13 | R7RS_BASE | UP_2019 },
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{ "string-reverse", fl_string_reverse, SRFI_13 | UP_2019 },
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{ "string-split", builtin_string_split, UP_2019 },
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{ "substring", fl_string_sub, R7RS_BASE | UP_2019 },
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{ "environment-stack", builtin_environment_stack, UP_2019 },
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{ "read-ini-file", builtin_read_ini_file, UP_2019 },
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{ "pid", builtin_pid, SRFI_170 | UP_2019 },
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{ "parent-pid", builtin_parent_pid, SRFI_170 | UP_2019 },
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{ "process-group", builtin_process_group, SRFI_170 | UP_2019 },
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{ "user-effective-gid", builtin_user_effective_gid, SRFI_170 | UP_2019 },
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{ "user-effective-uid", builtin_user_effective_uid, SRFI_170 | UP_2019 },
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{ "user-real-gid", builtin_user_real_gid, SRFI_170 | UP_2019 },
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{ "user-real-uid", builtin_user_real_uid, SRFI_170 | UP_2019 },
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{ "term-init", builtin_term_init, UP_2019 },
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{ "term-exit", builtin_term_exit, UP_2019 },
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{ "spawn", builtin_spawn, SRFI_170 | UP_2019 },
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{ "color-name->rgb24", builtin_color_name_to_rgb24, UP_2019 },
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{ "file-exists?", builtin_file_exists, R7RS_FILE | UP_2019 },
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{ "open-directory", builtin_os_open_directory, SRFI_170 | UP_2019 },
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{ "read-directory", builtin_os_read_directory, SRFI_170 | UP_2019 },
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{ "close-directory", builtin_os_close_directory, SRFI_170 | UP_2019 },
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{ "get-environment-variables", builtin_get_environment_variables,
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R7RS_PROCESS_CONTEXT | UP_2019 },
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{ "get-environment-variable", builtin_get_environment_variable,
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R7RS_PROCESS_CONTEXT | UP_2019 },
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{ "set-environment-variable", builtin_set_environment_variable,
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R7RS_PROCESS_CONTEXT | UP_2019 },
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{ "ascii-codepoint?", builtin_ascii_codepoint_p, SRFI_175 | UP_2019 },
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//{ "ascii-bytevector?", builtin_ascii_bytevector_p, SRFI_175 | UP_2019 },
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{ "ascii-char?", builtin_ascii_char_p, SRFI_175 | UP_2019 },
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//{ "ascii-string?", builtin_ascii_string_p, SRFI_175 | UP_2019 },
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{ "ascii-control?", builtin_ascii_control_p, SRFI_175 | UP_2019 },
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{ "ascii-display?", builtin_ascii_display_p, SRFI_175 | UP_2019 },
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{ "ascii-space-or-tab?", builtin_ascii_space_or_tab_p,
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SRFI_175 | UP_2019 },
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{ "ascii-punctuation?", builtin_ascii_punctuation_p, SRFI_175 | UP_2019 },
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{ "ascii-alphanumeric?", builtin_ascii_alphanumeric_p,
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SRFI_175 | UP_2019 },
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{ "ascii-alphabetic?", builtin_ascii_alphabetic_p, SRFI_175 | UP_2019 },
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{ "ascii-numeric?", builtin_ascii_numeric_p, SRFI_175 | UP_2019 },
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{ "ascii-whitespace?", builtin_ascii_whitespace_p, SRFI_175 | UP_2019 },
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{ "ascii-upper-case?", builtin_ascii_upper_case_p, SRFI_175 | UP_2019 },
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{ "ascii-lower-case?", builtin_ascii_lower_case_p, SRFI_175 | UP_2019 },
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{ "ascii-upcase", builtin_ascii_upcase, SRFI_175 | UP_2019 },
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{ "ascii-downcase", builtin_ascii_downcase, SRFI_175 | UP_2019 },
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{ "ascii-open-bracket", builtin_ascii_open_bracket, SRFI_175 | UP_2019 },
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{ "ascii-close-bracket", builtin_ascii_close_bracket,
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SRFI_175 | UP_2019 },
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{ "ascii-mirror-bracket", builtin_ascii_mirror_bracket,
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SRFI_175 | UP_2019 },
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{ "ascii-control->display", builtin_ascii_control_to_display,
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SRFI_175 | UP_2019 },
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{ "ascii-display->control", builtin_ascii_display_to_control,
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SRFI_175 | UP_2019 },
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{ "ascii-nth-digit", builtin_ascii_nth_digit, SRFI_175 | UP_2019 },
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{ "ascii-nth-upper-case", builtin_ascii_nth_upper_case,
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SRFI_175 | UP_2019 },
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{ "ascii-nth-lower-case", builtin_ascii_nth_lower_case,
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SRFI_175 | UP_2019 },
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{ "ascii-digit-value", builtin_ascii_digit_value, SRFI_175 | UP_2019 },
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{ "ascii-upper-case-value", builtin_ascii_upper_case_value,
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SRFI_175 | UP_2019 },
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{ "ascii-lower-case-value", builtin_ascii_lower_case_value,
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SRFI_175 | UP_2019 },
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{ 0, 0, 0 },
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};
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static struct builtin_library builtin_libraries[] = {
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{ "scheme/base", R7RS_BASE },
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{ "scheme/char", R7RS_CHAR },
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{ "scheme/cxr", R7RS_CXR },
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{ "scheme/file", R7RS_FILE },
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{ "srfi/13", SRFI_13 },
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{ "srfi/170", SRFI_170 },
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{ "srfi/175", SRFI_175 },
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{ "srfi/176", SRFI_176 },
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{ "upscheme/2019/unstable", UP_2019 },
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{ 0, 0 },
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};
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static struct builtin_library *builtin_library_by_path(const char *path)
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{
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struct builtin_library *lib;
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for (lib = builtin_libraries; lib->path; lib++) {
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if (!strcmp(lib->path, path)) {
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return lib;
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}
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}
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return 0;
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}
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static void parse_library_name(struct buf *path, value_t libname, int pathsep)
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{
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value_t part;
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if (libname == FL_NIL) {
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lerror(ArgError, "library name is the empty list");
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}
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for (;;) {
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if (!iscons(libname)) {
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lerror(ArgError, "library name is not a proper list");
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}
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part = car_(libname);
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if (issymbol(part)) {
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buf_puts(path, symbol_name(part));
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} else if (isfixnum(part)) {
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buf_putu(path, tofixnum(part, "library name part"));
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} else {
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lerror(ArgError, "library name part is not a symbol or a fixnum");
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}
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if ((libname = cdr_(libname)) == FL_NIL) {
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break;
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}
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buf_putc(path, pathsep);
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}
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}
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static void import_set(value_t impset)
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{
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value_t head;
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struct buf *path;
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const char *name;
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struct builtin_library *lib;
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struct builtin_procedure *proc;
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if (impset == FL_NIL) {
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lerror(ArgError, "import: empty list given");
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} else if (!iscons(impset)) {
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lerror(ArgError, "import: non-list argument given");
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}
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head = car_(impset);
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if (issymbol(head)) {
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name = symbol_name(head);
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if (!strcmp(name, "only")) {
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lerror(ArgError, "import: not implemented: only");
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} else if (!strcmp(name, "except")) {
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lerror(ArgError, "import: not implemented: except");
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} else if (!strcmp(name, "prefix")) {
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lerror(ArgError, "import: not implemented: prefix");
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} else if (!strcmp(name, "rename")) {
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lerror(ArgError, "import: not implemented: rename");
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}
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}
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path = buf_new();
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parse_library_name(path, impset, '/');
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// buf_puts(path, ".sld");
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buf_putc(path, 0);
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if (!(lib = builtin_library_by_path(path->bytes))) {
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lerror(ArgError, "import: library not found");
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}
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for (proc = builtin_procedures; proc->name; proc++) {
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if (proc->lib_id_mask & lib->lib_id) {
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// fprintf(stderr, "Importing %s\n", proc->name);
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setc(symbol(proc->name), cbuiltin(proc->name, proc->fptr));
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}
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}
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}
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value_t builtin_import(value_t *args, uint32_t nargs)
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{
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uint32_t i;
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for (i = 0; i < nargs; i++) {
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import_set(args[i]);
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}
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return FL_NIL;
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}
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