mirror of
https://github.com/sheumann/hush.git
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shell/math: return string error indicator, not integer
function old new delta expand_and_evaluate_arith 87 106 +19 expand_one_var 1563 1570 +7 arith 12 18 +6 evaluate_string 678 680 +2 arith_apply 1269 1271 +2 builtin_umask 133 132 -1 ash_arith 118 75 -43 expand_vars_to_list 1094 1038 -56 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/3 up/down: 36/-100) Total: -64 bytes Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko
parent
197a6b3c14
commit
063847d6bd
11
shell/ash.c
11
shell/ash.c
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@ -5451,15 +5451,8 @@ ash_arith(const char *s)
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INT_OFF;
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result = arith(&math_state, s);
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if (math_state.errcode < 0) {
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if (math_state.errcode == -3)
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ash_msg_and_raise_error("exponent less than 0");
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if (math_state.errcode == -2)
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ash_msg_and_raise_error("divide by zero");
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if (math_state.errcode == -5)
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ash_msg_and_raise_error("expression recursion loop detected");
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raise_error_syntax(s);
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}
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if (math_state.errmsg)
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ash_msg_and_raise_error(math_state.errmsg);
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INT_ON;
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return result;
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@ -55,28 +55,28 @@ Format: 'expected actual'
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30 30
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20 20
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30 30
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./arith.tests: line 117: syntax error: 1 ? 20 : x+=2
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./arith.tests: line 117: arithmetic syntax error
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6 6
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6,5,3 6,5,3
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263 263
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255 255
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40 40
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./arith.tests: line 163: syntax error: 7 = 43
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./arith.tests: line 163: arithmetic syntax error
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./arith.tests: line 165: divide by zero
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./arith.tests: let: line 166: syntax error: jv += $iv
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./arith.tests: line 167: syntax error: jv += $iv
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./arith.tests: let: line 168: syntax error: rv = 7 + (43 * 6
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./arith.tests: let: line 166: arithmetic syntax error
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./arith.tests: line 167: arithmetic syntax error
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./arith.tests: let: line 168: arithmetic syntax error
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abc
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def
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ghi
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./arith.tests: line 191: syntax error: ( 4 + A ) + 4
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./arith.tests: line 191: arithmetic syntax error
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16 16
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./arith.tests: line 196: syntax error: 4 ? : 3 + 5
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./arith.tests: line 197: syntax error: 1 ? 20
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./arith.tests: line 198: syntax error: 4 ? 20 :
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./arith.tests: line 196: arithmetic syntax error
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./arith.tests: line 197: arithmetic syntax error
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./arith.tests: line 198: arithmetic syntax error
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9 9
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./arith.tests: line 205: syntax error: 0 && B=42
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./arith.tests: line 208: syntax error: 1 || B=88
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./arith.tests: line 205: arithmetic syntax error
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./arith.tests: line 208: arithmetic syntax error
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9 9
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9 9
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9 9
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@ -97,18 +97,18 @@ ghi
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3 3
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4 4
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4 4
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./arith.tests: line 257: syntax error: 7--
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./arith.tests: line 259: syntax error: --x=7
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./arith.tests: line 260: syntax error: ++x=7
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./arith.tests: line 262: syntax error: x++=7
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./arith.tests: line 263: syntax error: x--=7
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./arith.tests: line 257: arithmetic syntax error
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./arith.tests: line 259: arithmetic syntax error
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./arith.tests: line 260: arithmetic syntax error
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./arith.tests: line 262: arithmetic syntax error
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./arith.tests: line 263: arithmetic syntax error
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4 4
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7 7
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-7 -7
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./arith1.sub: line 2: syntax error: 4--
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./arith1.sub: line 3: syntax error: 4++
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./arith1.sub: line 4: syntax error: 4 --
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./arith1.sub: line 5: syntax error: 4 ++
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./arith1.sub: line 2: arithmetic syntax error
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./arith1.sub: line 3: arithmetic syntax error
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./arith1.sub: line 4: arithmetic syntax error
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./arith1.sub: line 5: arithmetic syntax error
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6 6
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3 3
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7 7
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@ -119,19 +119,19 @@ ghi
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2 2
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-2 -2
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1 1
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./arith1.sub: line 37: syntax error: +++7
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./arith2.sub: line 2: syntax error: --7
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./arith2.sub: line 3: syntax error: ++7
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./arith2.sub: line 4: syntax error: -- 7
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./arith2.sub: line 5: syntax error: ++ 7
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./arith1.sub: line 37: arithmetic syntax error
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./arith2.sub: line 2: arithmetic syntax error
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./arith2.sub: line 3: arithmetic syntax error
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./arith2.sub: line 4: arithmetic syntax error
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./arith2.sub: line 5: arithmetic syntax error
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5 5
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1 1
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4 4
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0 0
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./arith2.sub: line 42: syntax error: -- - 7
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./arith2.sub: line 47: syntax error: ++ + 7
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./arith2.sub: line 42: arithmetic syntax error
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./arith2.sub: line 47: arithmetic syntax error
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8 12
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./arith.tests: line 290: syntax error: a b
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./arith.tests: line 290: arithmetic syntax error
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42
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42
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42
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40
shell/hush.c
40
shell/hush.c
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@ -4461,7 +4461,7 @@ static char *encode_then_expand_string(const char *str, int process_bkslash, int
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}
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#if ENABLE_SH_MATH_SUPPORT
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static arith_t expand_and_evaluate_arith(const char *arg, int *errcode_p)
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static arith_t expand_and_evaluate_arith(const char *arg, const char **errmsg_p)
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{
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arith_state_t math_state;
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arith_t res;
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@ -4472,8 +4472,11 @@ static arith_t expand_and_evaluate_arith(const char *arg, int *errcode_p)
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//math_state.endofname = endofname;
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exp_str = encode_then_expand_string(arg, /*process_bkslash:*/ 1, /*unbackslash:*/ 1);
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res = arith(&math_state, exp_str ? exp_str : arg);
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*errcode_p = math_state.errcode;
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free(exp_str);
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if (errmsg_p)
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*errmsg_p = math_state.errmsg;
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if (math_state.errmsg)
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die_if_script(math_state.errmsg);
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return res;
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}
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#endif
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@ -4714,22 +4717,26 @@ static NOINLINE const char *expand_one_var(char **to_be_freed_pp, char *arg, cha
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* var:N<SPECIAL_VAR_SYMBOL>M<SPECIAL_VAR_SYMBOL>
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*/
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arith_t beg, len;
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int errcode = 0;
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const char *errmsg;
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beg = expand_and_evaluate_arith(exp_word, &errcode);
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beg = expand_and_evaluate_arith(exp_word, &errmsg);
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if (errmsg)
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goto arith_err;
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debug_printf_varexp("beg:'%s'=%lld\n", exp_word, (long long)beg);
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*p++ = SPECIAL_VAR_SYMBOL;
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exp_word = p;
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p = strchr(p, SPECIAL_VAR_SYMBOL);
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*p = '\0';
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len = expand_and_evaluate_arith(exp_word, &errcode);
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len = expand_and_evaluate_arith(exp_word, &errmsg);
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if (errmsg)
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goto arith_err;
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debug_printf_varexp("len:'%s'=%lld\n", exp_word, (long long)len);
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if (errcode >= 0 && len >= 0) { /* bash compat: len < 0 is illegal */
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if (len >= 0) { /* bash compat: len < 0 is illegal */
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if (beg < 0) /* bash compat */
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beg = 0;
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debug_printf_varexp("from val:'%s'\n", val);
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if (len == 0 || !val || beg >= strlen(val)) {
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arith_err:
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val = NULL;
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} else {
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/* Paranoia. What if user entered 9999999999999
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@ -4926,28 +4933,11 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg)
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#if ENABLE_SH_MATH_SUPPORT
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case '+': { /* <SPECIAL_VAR_SYMBOL>+cmd<SPECIAL_VAR_SYMBOL> */
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arith_t res;
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int errcode;
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arg++; /* skip '+' */
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*p = '\0'; /* replace trailing <SPECIAL_VAR_SYMBOL> */
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debug_printf_subst("ARITH '%s' first_ch %x\n", arg, first_ch);
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res = expand_and_evaluate_arith(arg, &errcode);
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if (errcode < 0) {
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const char *msg = "error in arithmetic";
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switch (errcode) {
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case -3:
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msg = "exponent less than 0";
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break;
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case -2:
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msg = "divide by 0";
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break;
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case -5:
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msg = "expression recursion loop detected";
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break;
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}
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die_if_script(msg);
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}
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res = expand_and_evaluate_arith(arg, NULL);
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debug_printf_subst("ARITH RES '"arith_t_fmt"'\n", res);
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sprintf(arith_buf, arith_t_fmt, res);
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val = arith_buf;
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@ -61,7 +61,7 @@ check that the unevaluated part of the ternary operator does not do evaluation o
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20 20
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30 30
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check precedence of assignment vs. conditional operator
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hush: error in arithmetic
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hush: arithmetic syntax error
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check precedence of assignment vs. conditional operator
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associativity of assignment-operator operator
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6 6
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@ -70,22 +70,22 @@ octal, hex
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263 263
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255 255
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40 40
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hush: error in arithmetic
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hush: divide by 0
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hush: arithmetic syntax error
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hush: divide by zero
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hush: can't execute 'let': No such file or directory
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hush: error in arithmetic
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hush: arithmetic syntax error
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hush: can't execute 'let': No such file or directory
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abc
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def
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ghi
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hush: error in arithmetic
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hush: arithmetic syntax error
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16 16
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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9 9
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hush: error in arithmetic
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hush: error in arithmetic
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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9 9
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9 9
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9 9
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@ -106,18 +106,18 @@ hush: error in arithmetic
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3 3
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4 4
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4 4
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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4 4
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7 7
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-7 -7
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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6 6
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3 3
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7 7
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@ -128,19 +128,19 @@ hush: error in arithmetic
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2 2
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-2 -2
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1 1
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: error in arithmetic
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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5 5
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1 1
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4 4
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0 0
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hush: error in arithmetic
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hush: error in arithmetic
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hush: arithmetic syntax error
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hush: arithmetic syntax error
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8 12
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hush: error in arithmetic
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hush: arithmetic syntax error
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42
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42
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42
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81
shell/math.c
81
shell/math.c
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@ -26,26 +26,26 @@
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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/* Copyright (c) 2001 Aaron Lehmann <aaronl@vitelus.com>
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
|
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
|
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* "Software"), to deal in the Software without restriction, including
|
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* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sublicense, and/or sell copies of the Software, and to
|
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* permit persons to whom the Software is furnished to do so, subject to
|
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* the following conditions:
|
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*
|
||||
* The above copyright notice and this permission notice shall be
|
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* included in all copies or substantial portions of the Software.
|
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/* This is my infix parser/evaluator. It is optimized for size, intended
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* as a replacement for yacc-based parsers. However, it may well be faster
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@ -60,9 +60,6 @@
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* this is based (this code differs in that it applies operators immediately
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* to the stack instead of adding them to a queue to end up with an
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* expression).
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*
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* To use the routine, call it with an expression string and error return
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* pointer
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*/
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/*
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@ -250,7 +247,7 @@ typedef struct remembered_name {
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static arith_t FAST_FUNC
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evaluate_string(arith_state_t *math_state, const char *expr);
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static int
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static const char*
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arith_lookup_val(arith_state_t *math_state, v_n_t *t)
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{
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if (t->var) {
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@ -264,8 +261,8 @@ arith_lookup_val(arith_state_t *math_state, v_n_t *t)
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*/
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for (cur = math_state->list_of_recursed_names; cur; cur = cur->next) {
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if (strcmp(cur->var, t->var) == 0) {
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/* Yes. Expression recursion loop detected */
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return -5;
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/* Yes */
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return "expression recursion loop detected";
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}
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}
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@ -281,7 +278,7 @@ arith_lookup_val(arith_state_t *math_state, v_n_t *t)
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/* pop current var name */
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math_state->list_of_recursed_names = cur;
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return math_state->errcode;
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return math_state->errmsg;
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}
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/* treat undefined var as 0 */
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t->val = 0;
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@ -292,14 +289,14 @@ arith_lookup_val(arith_state_t *math_state, v_n_t *t)
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/* "Applying" a token means performing it on the top elements on the integer
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* stack. For an unary operator it will only change the top element, but a
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* binary operator will pop two arguments and push the result */
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static NOINLINE int
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static NOINLINE const char*
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arith_apply(arith_state_t *math_state, operator op, v_n_t *numstack, v_n_t **numstackptr)
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{
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#define NUMPTR (*numstackptr)
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v_n_t *numptr_m1;
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arith_t numptr_val, rez;
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int err;
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const char *err;
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/* There is no operator that can work without arguments */
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if (NUMPTR == numstack)
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@ -399,13 +396,13 @@ arith_apply(arith_state_t *math_state, operator op, v_n_t *numstack, v_n_t **num
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} else if (op == TOK_EXPONENT) {
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arith_t c;
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if (numptr_val < 0)
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return -3; /* exponent less than 0 */
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return "exponent less than 0";
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c = 1;
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while (--numptr_val >= 0)
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c *= rez;
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rez = c;
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} else if (numptr_val==0) /* zero divisor check */
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return -2;
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} else if (numptr_val == 0)
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return "divide by zero";
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else if (op == TOK_DIV || op == TOK_DIV_ASSIGN)
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rez /= numptr_val;
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else if (op == TOK_REM || op == TOK_REM_ASSIGN)
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@ -430,9 +427,9 @@ arith_apply(arith_state_t *math_state, operator op, v_n_t *numstack, v_n_t **num
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numptr_m1->val = rez;
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/* erase var name, it is just a number now */
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numptr_m1->var = NULL;
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return 0;
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return NULL;
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err:
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return -1;
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return "arithmetic syntax error";
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#undef NUMPTR
|
||||
}
|
||||
|
||||
|
|
@ -498,7 +495,7 @@ static arith_t FAST_FUNC
|
|||
evaluate_string(arith_state_t *math_state, const char *expr)
|
||||
{
|
||||
operator lasttok;
|
||||
int errcode;
|
||||
const char *errmsg;
|
||||
const char *start_expr = expr = skip_whitespace(expr);
|
||||
unsigned expr_len = strlen(expr) + 2;
|
||||
/* Stack of integers */
|
||||
|
|
@ -512,7 +509,7 @@ evaluate_string(arith_state_t *math_state, const char *expr)
|
|||
operator *stackptr = stack;
|
||||
|
||||
*stackptr++ = lasttok = TOK_LPAREN; /* start off with a left paren */
|
||||
errcode = 0;
|
||||
errmsg = NULL;
|
||||
|
||||
while (1) {
|
||||
const char *p;
|
||||
|
|
@ -548,7 +545,7 @@ evaluate_string(arith_state_t *math_state, const char *expr)
|
|||
}
|
||||
if (numstack->var) {
|
||||
/* expression is $((var)) only, lookup now */
|
||||
errcode = arith_lookup_val(math_state, numstack);
|
||||
errmsg = arith_lookup_val(math_state, numstack);
|
||||
}
|
||||
goto ret;
|
||||
}
|
||||
|
|
@ -663,8 +660,8 @@ evaluate_string(arith_state_t *math_state, const char *expr)
|
|||
break;
|
||||
}
|
||||
}
|
||||
errcode = arith_apply(math_state, prev_op, numstack, &numstackptr);
|
||||
if (errcode)
|
||||
errmsg = arith_apply(math_state, prev_op, numstack, &numstackptr);
|
||||
if (errmsg)
|
||||
goto ret;
|
||||
}
|
||||
if (op == TOK_RPAREN) {
|
||||
|
|
@ -678,15 +675,17 @@ evaluate_string(arith_state_t *math_state, const char *expr)
|
|||
} /* while (1) */
|
||||
|
||||
err:
|
||||
numstack->val = errcode = -1;
|
||||
numstack->val = -1;
|
||||
errmsg = "arithmetic syntax error";
|
||||
ret:
|
||||
math_state->errcode = errcode;
|
||||
math_state->errmsg = errmsg;
|
||||
return numstack->val;
|
||||
}
|
||||
|
||||
arith_t FAST_FUNC
|
||||
arith(arith_state_t *math_state, const char *expr)
|
||||
{
|
||||
math_state->errmsg = NULL;
|
||||
math_state->list_of_recursed_names = NULL;
|
||||
return evaluate_string(math_state, expr);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -95,7 +95,7 @@ typedef void FAST_FUNC (*arith_var_set_t)(const char *name, const char *v
|
|||
//typedef const char* FAST_FUNC (*arith_var_endofname_t)(const char *name);
|
||||
|
||||
typedef struct arith_state_t {
|
||||
int errcode;
|
||||
const char *errmsg;
|
||||
arith_var_lookup_t lookupvar;
|
||||
arith_var_set_t setvar;
|
||||
// arith_var_endofname_t endofname;
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user