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cparse
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advance() instead of manually doing ++text --size

master
Алексей Олохтонов 2 years ago
parent
00eb2f9ea7
commit
f8fc74f4d8
2 changed files with 117 additions and 179 deletions
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  1. 7
      input.c
  2. 281
      main.c

7
input.c
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@ -1,7 +1,12 @@
ident_ ident_
i1dent i1dent
i\uffffent i\uffffent
i\UFFfFaaAadent i\UFFfFaaAadent // comment
/*
multi
line
comment */
123 123
0707 0707

281
main.c
Unescape View File

@ -37,6 +37,22 @@ struct token {
char *end; // one past end char *end; // one past end
}; };
static unsigned long long
usec_now(void)
{
struct timespec tp = { 0 };
clock_gettime(CLOCK_MONOTONIC_RAW, &tp);
unsigned long long now = tp.tv_sec * 1000000ULL + tp.tv_nsec / 1000ULL;
return(now);
}
static inline void
advance(struct str *s, int by)
{
s->text += by;
s->size -= by;
}
static int static int
nondigit(struct str s) nondigit(struct str s)
{ {
@ -159,23 +175,19 @@ integer_suffix(struct str s)
int sym = 0; int sym = 0;
if ((sym = unsigned_suffix(s))) { if ((sym = unsigned_suffix(s))) {
s.text += sym; advance(&s, sym);
s.size -= sym;
int ll = long_long_suffix(s); int ll = long_long_suffix(s);
if (ll) { if (ll) {
return(sym + ll); return(sym + ll);
} }
return(sym + long_suffix(s)); return(sym + long_suffix(s));
} else if ((sym = long_long_suffix(s))) { } else if ((sym = long_long_suffix(s))) {
s.text += sym; advance(&s, sym);
s.size -= sym;
return(sym + unsigned_suffix(s)); return(sym + unsigned_suffix(s));
} else if ((sym = long_suffix(s))) { } else if ((sym = long_suffix(s))) {
s.text += sym; advance(&s, sym);
s.size -= sym;
return(sym + unsigned_suffix(s)); return(sym + unsigned_suffix(s));
} }
@ -206,20 +218,16 @@ octal_escape_sequence(struct str s)
int start = s.size; int start = s.size;
if (s.size && s.text[0] == '\\') { if (s.size && s.text[0] == '\\') {
s.text++; advance(&s, 1);
s.size--;
if (octal_digit(s)) { if (octal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
if (octal_digit(s)) { if (octal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
if (octal_digit(s)) { if (octal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
} }
} }
@ -237,17 +245,14 @@ hexadecimal_escape_sequence(struct str s)
if (s.size >= 2) { if (s.size >= 2) {
if (s.text[0] == '\\' && s.text[1] == 'x') { if (s.text[0] == '\\' && s.text[1] == 'x') {
s.text += 2; advance(&s, 2);
s.size -= 2;
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
for (;;) { for (;;) {
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
} else { } else {
break; break;
} }
@ -266,14 +271,11 @@ hex_quad(struct str s)
{ {
if (s.size >= 4) { if (s.size >= 4) {
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
return(4); return(4);
} }
@ -293,19 +295,16 @@ universal_character_name(struct str s)
if (s.text[0] == '\\') { if (s.text[0] == '\\') {
if (s.text[1] == 'u') { if (s.text[1] == 'u') {
s.text += 2; advance(&s, 2);
s.size -= 2;
int hq = hex_quad(s); int hq = hex_quad(s);
if (hq) { if (hq) {
return(2 + hq); return(2 + hq);
} }
} else if (s.text[1] == 'U') { } else if (s.text[1] == 'U') {
s.text += 2; advance(&s, 2);
s.size -= 2;
int hq1 = hex_quad(s); int hq1 = hex_quad(s);
if (hq1) { if (hq1) {
s.text += hq1; advance(&s, hq1);
s.size -= hq1;
int hq2 = hex_quad(s); int hq2 = hex_quad(s);
if (hq2) { if (hq2) {
return(2 + hq1 + hq2); return(2 + hq1 + hq2);
@ -336,15 +335,13 @@ identifier(struct str s)
int in = identifier_nondigit(s); int in = identifier_nondigit(s);
if (in) { if (in) {
s.text += in; advance(&s, in);
s.size -= in;
int sym = 0; int sym = 0;
for (;;) { for (;;) {
if ((sym = identifier_nondigit(s)) || (sym = digit(s))) { if ((sym = identifier_nondigit(s)) || (sym = digit(s))) {
s.text += sym; advance(&s, sym);
s.size -= sym;
} else { } else {
break; break;
} }
@ -362,13 +359,11 @@ decimal_constant(struct str s)
int start = s.size; int start = s.size;
if (nonzero_digit(s)) { if (nonzero_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
for (;;) { for (;;) {
if (digit(s)) { if (digit(s)) {
s.text++; advance(&s, 1);
s.size--;
} else { } else {
break; break;
} }
@ -387,13 +382,11 @@ octal_constant(struct str s)
if (s.size) { if (s.size) {
if (s.text[0] == '0') { if (s.text[0] == '0') {
s.text++; advance(&s, 1);
s.size--;
for (;;) { for (;;) {
if (octal_digit(s)) { if (octal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
} else { } else {
break; break;
} }
@ -413,17 +406,14 @@ hexadecimal_constant(struct str s)
int hp = hexadecimal_prefix(s); int hp = hexadecimal_prefix(s);
if (hp) { if (hp) {
s.text += hp; advance(&s, hp);
s.size -= hp;
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
for (;;) { for (;;) {
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
} else { } else {
break; break;
} }
@ -442,8 +432,7 @@ integer_constant(struct str s)
int sym = 0; int sym = 0;
if ((sym = hexadecimal_constant(s)) || (sym = octal_constant(s)) || (sym = decimal_constant(s))) { if ((sym = hexadecimal_constant(s)) || (sym = octal_constant(s)) || (sym = decimal_constant(s))) {
s.text += sym; advance(&s, sym);
s.size -= sym;
return(sym + integer_suffix(s)); return(sym + integer_suffix(s));
} }
@ -456,13 +445,11 @@ digit_sequence(struct str s)
int start = s.size; int start = s.size;
if (digit(s)) { if (digit(s)) {
s.text++; advance(&s, 1);
s.size--;
for (;;) { for (;;) {
if (digit(s)) { if (digit(s)) {
s.text++; advance(&s, 1);
s.size--;
} else { } else {
break; break;
} }
@ -484,13 +471,10 @@ fractional_constant(struct str s)
if (s.size) { if (s.size) {
if (s.text[0] == '.') { if (s.text[0] == '.') {
s.text++; advance(&s, 1);
s.size--;
int ds2 = digit_sequence(s); int ds2 = digit_sequence(s);
advance(&s, ds2);
s.text += ds2;
s.size -= ds2;
if (ds1 > 0 || ds2 > 0) { if (ds1 > 0 || ds2 > 0) {
return(ds1 + ds2 + 1); return(ds1 + ds2 + 1);
@ -508,17 +492,14 @@ exponent_part(struct str s)
if (s.size) { if (s.size) {
if (s.text[0] == 'e' || s.text[0] == 'E') { if (s.text[0] == 'e' || s.text[0] == 'E') {
s.text++; advance(&s, 1);
s.size--;
int sgn = sign(s); int sgn = sign(s);
s.text += sgn; advance(&s, sgn);
s.size -= sgn;
int ds = digit_sequence(s); int ds = digit_sequence(s);
if (ds) { if (ds) {
s.text += ds; advance(&s, ds);
s.size -= ds;
return(start - s.size); return(start - s.size);
} }
} }
@ -532,23 +513,19 @@ decimal_floating_constant(struct str s)
{ {
int sym = 0; int sym = 0;
if ((sym = fractional_constant(s))) { if ((sym = fractional_constant(s))) {
s.text += sym; advance(&s, sym);
s.size -= sym;
int ep = exponent_part(s); int ep = exponent_part(s);
s.text += ep; advance(&s, ep);
s.size -= ep;
return(sym + ep + floating_suffix(s)); return(sym + ep + floating_suffix(s));
} else if ((sym = digit_sequence(s))) { } else if ((sym = digit_sequence(s))) {
s.text += sym; advance(&s, sym);
s.size -= sym;
int ep = 0; int ep = 0;
if ((ep = exponent_part(s))) { if ((ep = exponent_part(s))) {
s.text += ep; advance(&s, ep);
s.size -= ep;
return(sym + ep + floating_suffix(s)); return(sym + ep + floating_suffix(s));
} }
} }
@ -562,13 +539,11 @@ hexadecimal_digit_sequence(struct str s)
int start = s.size; int start = s.size;
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
for (;;) { for (;;) {
if (hexadecimal_digit(s)) { if (hexadecimal_digit(s)) {
s.text++; advance(&s, 1);
s.size--;
} else { } else {
break; break;
} }
@ -585,12 +560,10 @@ hexadecimal_fractional_constant(struct str s)
{ {
int hds1 = hexadecimal_digit_sequence(s); int hds1 = hexadecimal_digit_sequence(s);
s.text += hds1; advance(&s, hds1);
s.size -= hds1;
if (s.size && s.text[0] == '.') { if (s.size && s.text[0] == '.') {
s.text++; advance(&s, 1);
s.size--;
int hds2 = hexadecimal_digit_sequence(s); int hds2 = hexadecimal_digit_sequence(s);
@ -608,16 +581,14 @@ binary_exponent_part(struct str s)
int start = s.size; int start = s.size;
if (s.size && (s.text[0] == 'p' || s.text[0] == 'P')) { if (s.size && (s.text[0] == 'p' || s.text[0] == 'P')) {
s.text++; advance(&s, 1);
s.size--;
int sgn = sign(s); int sgn = sign(s);
s.text += sgn; advance(&s, sgn);
s.size -= sgn;
int ds = digit_sequence(s); int ds = digit_sequence(s);
if (ds) { if (ds) {
s.size -= ds; advance(&s, ds);
return(start - s.size); return(start - s.size);
} }
} }
@ -632,28 +603,23 @@ hexadecimal_floating_constant(struct str s)
int start = s.size; int start = s.size;
if ((hp = hexadecimal_prefix(s))) { if ((hp = hexadecimal_prefix(s))) {
s.text += hp; advance(&s, hp);
s.size -= hp;
int hfc = 0; int hfc = 0;
int hds = 0; int hds = 0;
if ((hfc = hexadecimal_fractional_constant(s))) { if ((hfc = hexadecimal_fractional_constant(s))) {
s.text += hfc; advance(&s, hfc);
s.size -= hfc;
int bep = binary_exponent_part(s); int bep = binary_exponent_part(s);
if (bep) { if (bep) {
s.text += bep; advance(&s, bep);
s.size -= bep;
return(start - s.size + floating_suffix(s)); return(start - s.size + floating_suffix(s));
} }
} else if ((hds = hexadecimal_digit_sequence(s))) { } else if ((hds = hexadecimal_digit_sequence(s))) {
s.text += hds; advance(&s, hds);
s.size -= hds;
int bep = binary_exponent_part(s); int bep = binary_exponent_part(s);
if (bep) { if (bep) {
s.text += bep; advance(&s, bep);
s.size -= bep;
return(start - s.size + floating_suffix(s)); return(start - s.size + floating_suffix(s));
} }
} }
@ -742,13 +708,11 @@ c_char_sequence(struct str s)
int sc = 0; int sc = 0;
if ((sc = c_char(s))) { if ((sc = c_char(s))) {
s.text += sc; advance(&s, sc);
s.size -= sc;
for (;;) { for (;;) {
if ((sc = c_char(s))) { if ((sc = c_char(s))) {
s.text += sc; advance(&s, sc);
s.size -= sc;
} else { } else {
break; break;
} }
@ -767,30 +731,25 @@ character_constant(struct str s)
int ok = 0; int ok = 0;
if (s.size && s.text[0] == '\'') { if (s.size && s.text[0] == '\'') {
s.text++; advance(&s, 1);
s.size--;
ok = 1; ok = 1;
} else if (s.size >= 2 && s.text[0] == 'L' && s.text[1] == '\'') { } else if (s.size >= 2 && s.text[0] == 'L' && s.text[1] == '\'') {
s.text += 2; advance(&s, 2);
s.size -= 2;
ok = 1; ok = 1;
} else if (s.size >= 2 && s.text[0] == 'u' && s.text[1] == '\'') { } else if (s.size >= 2 && s.text[0] == 'u' && s.text[1] == '\'') {
s.text += 2; advance(&s, 2);
s.size -= 2;
ok = 1; ok = 1;
} else if (s.size >= 2 && s.text[0] == 'U' && s.text[1] == '\'') { } else if (s.size >= 2 && s.text[0] == 'U' && s.text[1] == '\'') {
s.text += 2; advance(&s, 2);
s.size -= 2;
ok = 1; ok = 1;
} }
if (ok) { if (ok) {
int ccs = c_char_sequence(s); int ccs = c_char_sequence(s);
if (ccs) { if (ccs) {
s.text += ccs; advance(&s, ccs);
s.size -= ccs;
if (s.size && s.text[0] == '\'') { if (s.size && s.text[0] == '\'') {
s.size--; advance(&s, 1);
return(start - s.size); return(start - s.size);
} }
} }
@ -818,8 +777,7 @@ whitespace(struct str s)
int start = s.size; int start = s.size;
while (s.size && (s.text[0] == ' ' || s.text[0] == '\t' || s.text[0] == '\n' || s.text[0] == '\r')) { while (s.size && (s.text[0] == ' ' || s.text[0] == '\t' || s.text[0] == '\n' || s.text[0] == '\r')) {
s.text++; advance(&s, 1);
s.size--;
} }
return(start - s.size); return(start - s.size);
@ -849,13 +807,11 @@ s_char_sequence(struct str s)
int sc = 0; int sc = 0;
if ((sc = s_char(s))) { if ((sc = s_char(s))) {
s.text += sc; advance(&s, sc);
s.size -= sc;
for (;;) { for (;;) {
if ((sc = s_char(s))) { if ((sc = s_char(s))) {
s.text += sc; advance(&s, sc);
s.size -= sc;
} else { } else {
break; break;
} }
@ -890,19 +846,16 @@ string_literal(struct str s)
int start = s.size; int start = s.size;
int ep = encoding_prefix(s); int ep = encoding_prefix(s);
s.text += ep; advance(&s, ep);
s.size -= ep;
if (s.size && s.text[0] == '\"') { if (s.size && s.text[0] == '\"') {
s.text++; advance(&s, 1);
s.size--;
int scs = s_char_sequence(s); int scs = s_char_sequence(s);
s.text += scs; advance(&s, scs);
s.size -= scs;
if (s.size && s.text[0] == '\"') { if (s.size && s.text[0] == '\"') {
s.size--; advance(&s, 1);
return(start - s.size); return(start - s.size);
} }
} }
@ -974,16 +927,14 @@ static int
h_char_sequence(struct str s) h_char_sequence(struct str s)
{ {
int start = s.size; int start = s.size;
int sc = 0; int hc = 0;
if ((sc = h_char(s))) { if ((hc = h_char(s))) {
s.text += sc; advance(&s, hc);
s.size -= sc;
for (;;) { for (;;) {
if ((sc = h_char(s))) { if ((hc = h_char(s))) {
s.text += sc; advance(&s, hc);
s.size -= sc;
} else { } else {
break; break;
} }
@ -999,16 +950,14 @@ static int
q_char_sequence(struct str s) q_char_sequence(struct str s)
{ {
int start = s.size; int start = s.size;
int sc = 0; int qc = 0;
if ((sc = q_char(s))) { if ((qc = q_char(s))) {
s.text += sc; advance(&s, qc);
s.size -= sc;
for (;;) { for (;;) {
if ((sc = q_char(s))) { if ((qc = q_char(s))) {
s.text += sc; advance(&s, qc);
s.size -= sc;
} else { } else {
break; break;
} }
@ -1024,13 +973,11 @@ static int
header_name(struct str s) header_name(struct str s)
{ {
if (s.size && s.text[0] == '<') { if (s.size && s.text[0] == '<') {
s.text++; advance(&s, 1);
s.size--;
int hcs = h_char_sequence(s); int hcs = h_char_sequence(s);
if (hcs) { if (hcs) {
s.text += hcs; advance(&s, hcs);
s.size -= hcs;
if (s.size && s.text[0] == '>') { if (s.size && s.text[0] == '>') {
return(hcs + 2); return(hcs + 2);
@ -1039,13 +986,11 @@ header_name(struct str s)
} }
if (s.size && s.text[0] == '\"') { if (s.size && s.text[0] == '\"') {
s.text++; advance(&s, 1);
s.size--;
int qcs = q_char_sequence(s); int qcs = q_char_sequence(s);
if (qcs) { if (qcs) {
s.text += qcs; advance(&s, qcs);
s.size -= qcs;
if (s.size && s.text[0] == '\"') { if (s.size && s.text[0] == '\"') {
return(qcs + 2); return(qcs + 2);
@ -1064,18 +1009,15 @@ comment(struct str s)
if (s.size >= 2) { if (s.size >= 2) {
if (s.text[0] == '/' && s.text[1] == '/') { if (s.text[0] == '/' && s.text[1] == '/') {
/* single-line comment */ /* single-line comment */
s.text += 2; advance(&s, 2);
s.size -= 2;
while (s.size) { while (s.size) {
if (s.text[0] == '\n') { if (s.text[0] == '\n') {
s.text++; advance(&s, 1);
s.size--;
break; break;
} }
s.text++; advance(&s, 1);
s.size--;
} }
return(start - s.size); return(start - s.size);
@ -1086,13 +1028,11 @@ comment(struct str s)
while (s.size) { while (s.size) {
if (s.size >= 2 && s.text[0] == '*' && s.text[1] == '/') { if (s.size >= 2 && s.text[0] == '*' && s.text[1] == '/') {
s.text += 2; advance(&s, 2);
s.size -= 2;
break; break;
} }
s.text++; advance(&s, 1);
s.size--;
} }
return(start - s.size); return(start - s.size);
@ -1109,8 +1049,7 @@ lex(char *text, int size)
while (s.size) { while (s.size) {
int sym = whitespace(s); int sym = whitespace(s);
s.text += sym; advance(&s, sym);
s.size -= sym;
if ((sym = comment(s))) { if ((sym = comment(s))) {
//printf("Comment: "); //printf("Comment: ");
@ -1136,8 +1075,7 @@ lex(char *text, int size)
//printf("%.*s\n", sym, s.text); //printf("%.*s\n", sym, s.text);
if (sym) { if (sym) {
s.text += sym; advance(&s, sym);
s.size -= sym;
} else if (s.size) { } else if (s.size) {
fprintf(stderr, "Error!\n"); fprintf(stderr, "Error!\n");
break; break;
@ -1168,22 +1106,17 @@ preprocess(char *data, int size)
static void static void
run(char *data, int size) run(char *data, int size)
{ {
struct timespec tp = { 0 }; unsigned long long before = usec_now();
{
clock_gettime(CLOCK_MONOTONIC_RAW, &tp);
unsigned long long before = tp.tv_sec * 1000000ULL + tp.tv_nsec / 1000ULL;
preprocess(data, size); preprocess(data, size);
struct token *tokens = lex(data, size); struct token *tokens = lex(data, size);
(void) tokens; (void) tokens;
}
unsigned long long after = usec_now();
clock_gettime(CLOCK_MONOTONIC_RAW, &tp); float dt = after - before;
unsigned long long after = tp.tv_sec * 1000000ULL + tp.tv_nsec / 1000ULL;
unsigned long long dt = after - before;
fprintf(stderr, "%.2fms, %.2fMB/s\n", (float) dt / 1000, (float) size / dt); fprintf(stderr, "%.2fms, %.2fMB/s\n", dt / 1000, size / dt);
} }
int int

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