83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/**
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* See Copyright Notice in picrin.h
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*/
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#include "picrin.h"
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static pic_value
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pic_char_char_p(pic_state *pic)
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{
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pic_value v;
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pic_get_args(pic, "o", &v);
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return pic_char_p(v) ? pic_true_value() : pic_false_value();
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}
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static pic_value
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pic_char_char_to_integer(pic_state *pic)
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{
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char c;
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pic_get_args(pic, "c", &c);
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return pic_int_value(c);
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}
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static pic_value
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pic_char_integer_to_char(pic_state *pic)
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{
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int i;
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pic_get_args(pic, "i", &i);
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return pic_char_value(i);
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}
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#define DEFINE_CHAR_CMP(op, name) \
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static pic_value \
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pic_char_##name##_p(pic_state *pic) \
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{ \
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size_t argc; \
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pic_value *argv; \
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size_t i; \
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char c, d; \
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\
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pic_get_args(pic, "cc*", &c, &d, &argc, &argv); \
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\
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if (! (c op d)) \
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return pic_false_value(); \
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\
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for (i = 0; i < argc; ++i) { \
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c = d; \
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if (pic_char_p(argv[i])) \
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d = pic_char(argv[i]); \
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else \
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pic_errorf(pic, #op ": char required"); \
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\
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if (! (c op d)) \
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return pic_false_value(); \
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} \
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\
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return pic_true_value(); \
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}
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DEFINE_CHAR_CMP(==, eq)
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DEFINE_CHAR_CMP(<, lt)
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DEFINE_CHAR_CMP(>, gt)
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DEFINE_CHAR_CMP(<=, le)
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DEFINE_CHAR_CMP(>=, ge)
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void
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pic_init_char(pic_state *pic)
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{
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pic_defun(pic, "char?", pic_char_char_p);
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pic_defun(pic, "char->integer", pic_char_char_to_integer);
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pic_defun(pic, "integer->char", pic_char_integer_to_char);
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pic_defun(pic, "char=?", pic_char_eq_p);
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pic_defun(pic, "char<?", pic_char_lt_p);
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pic_defun(pic, "char>?", pic_char_gt_p);
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pic_defun(pic, "char<=?", pic_char_le_p);
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pic_defun(pic, "char>=?", pic_char_ge_p);
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}
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