call main.scm inside main.c
This commit is contained in:
Yuichi Nishiwaki
parent
db38f13600
commit
fc388f8d46
303
tools/main.c
303
tools/main.c
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@ -2,284 +2,9 @@
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* See Copyright Notice in picrin.h
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*/
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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 <getopt.h>
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#include "picrin.h"
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#include "picrin/pair.h"
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#include "picrin/string.h"
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#include "picrin/error.h"
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#if PIC_ENABLE_READLINE
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# include <editline/readline.h>
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#endif
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#define CODE_MAX_LENGTH 1024
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#define LINE_MAX_LENGTH 256
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void
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print_help(void)
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{
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const char *help =
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"picrin scheme\n"
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"\n"
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"Usage: picrin [options] [file]\n"
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"\n"
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"Options:\n"
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" -e [program] run one liner ecript\n"
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" -h show this help";
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puts(help);
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}
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void
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import_repllib(pic_state *pic)
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{
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int ai = pic_gc_arena_preserve(pic);
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pic_import(pic, pic_read_cstr(pic, "(scheme base)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme load)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme process-context)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme read)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme write)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme file)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme inexact)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme cxr)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme lazy)"));
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pic_import(pic, pic_read_cstr(pic, "(scheme time)"));
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pic_import(pic, pic_read_cstr(pic, "(picrin macro)"));
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#if DEBUG
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puts("* imported repl libraries");
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#endif
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pic_gc_arena_restore(pic, ai);
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}
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int exit_status;
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void
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repl(pic_state *pic)
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{
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char code[CODE_MAX_LENGTH] = "", line[LINE_MAX_LENGTH];
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char *prompt;
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pic_value v, exprs;
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int ai;
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#if PIC_ENABLE_READLINE
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char *read_line;
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#else
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int last_char;
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int char_index;
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#endif
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#if PIC_ENABLE_READLINE
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using_history();
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char histfile[snprintf(NULL, 0, "%s/.picrin_history", getenv("HOME")) + 1];
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sprintf(histfile, "%s/.picrin_history", getenv("HOME"));
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read_history(histfile);
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#endif
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ai = pic_gc_arena_preserve(pic);
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while (1) {
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prompt = code[0] == '\0' ? "> " : "* ";
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#if DEBUG
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printf("[current ai = %d]\n", ai);
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#endif
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#if PIC_ENABLE_READLINE
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read_line = readline(prompt);
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if (read_line == NULL) {
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goto eof;
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}
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else {
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strncpy(line, read_line, LINE_MAX_LENGTH - 1);
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add_history(read_line);
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free(read_line);
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}
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#else
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printf("%s", prompt);
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char_index = 0;
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while ((last_char = getchar()) != '\n') {
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if (last_char == EOF)
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goto eof;
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if (char_index == LINE_MAX_LENGTH)
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goto overflow;
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line[char_index++] = (char)last_char;
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}
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line[char_index] = '\0';
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#endif
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if (strlen(code) + strlen(line) >= CODE_MAX_LENGTH)
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goto overflow;
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strcat(code, line);
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pic_try {
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/* read */
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exprs = pic_parse_cstr(pic, code);
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if (pic_undef_p(exprs)) {
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/* wait for more input */
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}
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else {
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code[0] = '\0';
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pic_for_each (v, exprs) {
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/* eval */
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v = pic_eval(pic, v, pic->lib);
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/* print */
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pic_printf(pic, "=> ~s\n", v);
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}
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}
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}
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pic_catch {
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pic_print_backtrace(pic, pic->err);
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pic->err = NULL;
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code[0] = '\0';
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}
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pic_gc_arena_restore(pic, ai);
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}
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eof:
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puts("");
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exit_status = 0;
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#if PIC_ENABLE_READLINE
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write_history(histfile);
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#endif
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return;
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overflow:
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puts("** [fatal] line input overflow");
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exit_status = 1;
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return;
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}
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void
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exec_file(pic_state *pic, const char *fname)
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{
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FILE *file;
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pic_value v, exprs;
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struct pic_proc *proc;
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file = fopen(fname, "r");
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if (file == NULL) {
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fprintf(stderr, "fatal error: could not read %s\n", fname);
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goto abort;
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}
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exprs = pic_parse_file(pic, file);
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if (pic_undef_p(exprs)) {
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fprintf(stderr, "fatal error: %s broken\n", fname);
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goto abort;
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}
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pic_for_each (v, exprs) {
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proc = pic_compile(pic, v, pic->lib);
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if (proc == NULL) {
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fputs(pic_errmsg(pic), stderr);
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fprintf(stderr, "fatal error: %s compilation failure\n", fname);
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goto abort;
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}
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v = pic_apply(pic, proc, pic_nil_value());
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if (pic_undef_p(v)) {
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fputs(pic_errmsg(pic), stderr);
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fprintf(stderr, "fatal error: %s evaluation failure\n", fname);
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goto abort;
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}
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}
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return;
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abort:
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exit_status = 1;
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return;
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}
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void
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exec_string(pic_state *pic, const char *str)
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{
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pic_value v, exprs;
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struct pic_proc *proc;
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int ai;
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exprs = pic_parse_cstr(pic, str);
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if (pic_undef_p(exprs)) {
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goto abort;
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}
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ai = pic_gc_arena_preserve(pic);
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pic_for_each (v, exprs) {
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proc = pic_compile(pic, v, pic->lib);
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if (proc == NULL) {
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goto abort;
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}
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v = pic_apply(pic, proc, pic_nil_value());
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if (pic_undef_p(v)) {
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goto abort;
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}
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pic_gc_arena_restore(pic, ai);
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}
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return;
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abort:
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exit_status = 1;
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return;
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}
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static char *fname;
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static char *script;
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enum {
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NO_MODE = 0,
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INTERACTIVE_MODE,
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FILE_EXEC_MODE,
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ONE_LINER_MODE,
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} mode;
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void
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parse_opt(int argc, char *argv[])
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{
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int r;
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while (~(r = getopt(argc, argv, "he:"))) {
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switch (r) {
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case 'h':
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print_help();
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exit(0);
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case 'e':
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script = optarg;
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mode = ONE_LINER_MODE;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc == 0) {
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if (mode == NO_MODE)
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mode = INTERACTIVE_MODE;
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}
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else {
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fname = argv[0];
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mode = FILE_EXEC_MODE;
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}
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}
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int
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main(int argc, char *argv[], char **envp)
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{
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@ -287,32 +12,14 @@ main(int argc, char *argv[], char **envp)
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pic = pic_open(argc, argv, envp);
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parse_opt(argc, argv);
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if (mode == INTERACTIVE_MODE || mode == ONE_LINER_MODE) {
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import_repllib(pic);
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pic_try {
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pic_load(pic, "/Users/yuichi/workspace/picrin/tools/main.scm");
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}
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switch (mode) {
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case NO_MODE:
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puts("logic flaw");
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abort();
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case INTERACTIVE_MODE:
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repl(pic);
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break;
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case FILE_EXEC_MODE:
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exec_file(pic, fname);
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break;
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case ONE_LINER_MODE:
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exec_string(pic, script);
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break;
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pic_catch {
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pic_print_backtrace(pic, pic->err);
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}
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pic_close(pic);
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#if DEBUG
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puts("* picrin successfully closed");
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#endif
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return exit_status;
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return 0;
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}
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