r4/expression-parser
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make EVERYTHING static

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r4 2021-11-23 17:16:21 +01:00
parent e3c466e321
commit b4ea1650b7
1 changed files with 19 additions and 19 deletions
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38
main.c
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@ -22,10 +22,10 @@ typedef struct Tok {
} Tok; } Tok;
#define TOKS_CAP 65536 #define TOKS_CAP 65536
Tok toks[TOKS_CAP]; static Tok toks[TOKS_CAP];
size_t toks_size = 0; static size_t toks_size = 0;
uint8_t op_prec[256] = { static uint8_t op_prec[256] = {
['('] = 0, /* A precedence of 0 is reserved for delimiters. */ ['('] = 0, /* A precedence of 0 is reserved for delimiters. */
[')'] = 0, [')'] = 0,
[','] = 0, [','] = 0,
@ -37,7 +37,7 @@ uint8_t op_prec[256] = {
}; };
#define OP_PREC(tok_char) (op_prec[(size_t)tok_char]) #define OP_PREC(tok_char) (op_prec[(size_t)tok_char])
enum { static enum {
OrderLtr, OrderLtr,
OrderRtl, OrderRtl,
} op_order[256] = { } op_order[256] = {
@ -61,20 +61,20 @@ typedef struct Function {
} Function; } Function;
#define FUNCTIONS_CAP 256 #define FUNCTIONS_CAP 256
Function functions[FUNCTIONS_CAP]; static Function functions[FUNCTIONS_CAP];
size_t functions_size = 0; static size_t functions_size = 0;
void push_tok(Tok t) { static void push_tok(Tok t) {
if (toks_size+1 < TOKS_CAP) if (toks_size+1 < TOKS_CAP)
toks[toks_size++] = t; toks[toks_size++] = t;
} }
void add_func(const char *name, real (*func)(real *args), size_t n_args) { static void add_func(const char *name, real (*func)(real *args), size_t n_args) {
if (functions_size+1 < FUNCTIONS_CAP) if (functions_size+1 < FUNCTIONS_CAP)
functions[functions_size++] = (Function){.name = name, .func = func, .n_args = n_args}; functions[functions_size++] = (Function){.name = name, .func = func, .n_args = n_args};
} }
void tokenize(char *expr) { static void tokenize(char *expr) {
push_tok((Tok){.kind = TokOp, .Char = '('}); push_tok((Tok){.kind = TokOp, .Char = '('});
size_t paren_depth = 0; size_t paren_depth = 0;
@ -152,7 +152,7 @@ void tokenize(char *expr) {
push_tok((Tok){.kind = TokOp, .Char = ')'}); push_tok((Tok){.kind = TokOp, .Char = ')'});
} }
void print_toks() { static void print_toks() {
for (size_t i = 0; i < toks_size; i++) { for (size_t i = 0; i < toks_size; i++) {
switch (toks[i].kind) { switch (toks[i].kind) {
case TokOp: case TokOp:
@ -177,12 +177,12 @@ void print_toks() {
} }
/* Delete tokens from begin to end (excluding end itself). */ /* Delete tokens from begin to end (excluding end itself). */
void del_toks(Tok *begin, Tok *end) { static void del_toks(Tok *begin, Tok *end) {
memmove(begin, end, (toks_size - (end - toks)) * sizeof(Tok)); memmove(begin, end, (toks_size - (end - toks)) * sizeof(Tok));
toks_size -= end - begin; toks_size -= end - begin;
} }
real eval(Tok *t) { static real eval(Tok *t) {
if (!(t[0].kind == TokOp && OP_PREC(t[0].Char) == 0)) { if (!(t[0].kind == TokOp && OP_PREC(t[0].Char) == 0)) {
fprintf(stderr, "Error: expected delimiter at beginning of expression\n"); fprintf(stderr, "Error: expected delimiter at beginning of expression\n");
exit(1); exit(1);
@ -298,19 +298,19 @@ real eval(Tok *t) {
} }
} }
void cleanup() { static void cleanup() {
for (size_t i = 0; i < toks_size; i++) { for (size_t i = 0; i < toks_size; i++) {
if (toks[i].kind == TokFunc) if (toks[i].kind == TokFunc)
free(toks[i].Str); free(toks[i].Str);
} }
} }
real fn_sqrt(real *args) { return sqrt(args[0]); } static real fn_sqrt(real *args) { return sqrt(args[0]); }
real fn_pow(real *args) { return pow(args[0], args[1]); } static real fn_pow(real *args) { return pow(args[0], args[1]); }
real fn_mod(real *args) { return fmod(args[0], args[1]); } static real fn_mod(real *args) { return fmod(args[0], args[1]); }
real fn_round(real *args) { return round(args[0]); } static real fn_round(real *args) { return round(args[0]); }
real fn_floor(real *args) { return floor(args[0]); } static real fn_floor(real *args) { return floor(args[0]); }
real fn_ceil(real *args) { return ceil(args[0]); } static real fn_ceil(real *args) { return ceil(args[0]); }
int main(int argc, char **argv) { int main(int argc, char **argv) {
if (argc != 2 || strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) { if (argc != 2 || strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) {