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-rw-r--r--libparser-generate.c146
1 files changed, 103 insertions, 43 deletions
diff --git a/libparser-generate.c b/libparser-generate.c
index f5f19ae..25fb8a9 100644
--- a/libparser-generate.c
+++ b/libparser-generate.c
@@ -1,10 +1,20 @@
/* See LICENSE file for copyright and license details. */
-#include <libsimple.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
#include <libsimple-arg.h>
USAGE("main-rule");
+#define eprintf(...) (fprintf(stderr, __VA_ARGS__), exit(1))
+
+
struct token {
size_t lineno;
size_t column;
@@ -30,6 +40,55 @@ static size_t nwant_rules = 0;
static size_t want_rules_size = 0;
+static void *
+emalloc(size_t n)
+{
+ void *ret = malloc(n);
+ if (!ret)
+ eprintf("%s: malloc %zu: %s\n", argv0, n, strerror(errno));
+ return ret;
+}
+
+static void *
+ecalloc(size_t n, size_t m)
+{
+ void *ret = calloc(n, m);
+ if (!ret)
+ eprintf("%s: calloc %zu %zu: %s\n", argv0, n, m, strerror(errno));
+ return ret;
+}
+
+static void *
+erealloc(void *ptr, size_t n)
+{
+ void *ret = realloc(ptr, n);
+ if (!ret)
+ eprintf("%s: realloc %p %zu: %s\n", argv0, ptr, n, strerror(errno));
+ return ret;
+}
+
+static void *
+ereallocarray(void *ptr, size_t n, size_t m)
+{
+ void *ret;
+ if (n && m > SIZE_MAX / n)
+ eprintf("%s: realloc %p %zu*%zu: %s\n", argv0, ptr, n, m, strerror(EOVERFLOW));
+ ret = realloc(ptr, n * n);
+ if (!ret)
+ eprintf("%s: realloc %p %zu*%zu: %s\n", argv0, ptr, n, m, strerror(errno));
+ return ret;
+}
+
+static char *
+estrdup(char *s)
+{
+ size_t n = strlen(s) + 1;
+ char *ret = emalloc(n);
+ memcpy(ret, s, n);
+ return ret;
+}
+
+
static int
strpcmp(const void *av, const void *bv)
{
@@ -101,7 +160,7 @@ readall_and_validate(int fd, const char *fname)
if (r <= 0) {
if (!r)
break;
- eprintf("read %s:", fname);
+ eprintf("%s: read %s: %s\n", argv0, fname, strerror(errno));
}
}
@@ -114,24 +173,24 @@ readall_and_validate(int fd, const char *fname)
column += 8 - column % 8;
character += 1;
} else if (buf[i] == '\r') {
- eprintf("%s contains a CR character on line %zu at column %zu (character %zu)\n",
- fname, lineno, column, character);
+ eprintf("%s: %s contains a CR character on line %zu at column %zu (character %zu)\n",
+ argv0, fname, lineno, column, character);
} else if ((0 < buf[i] && buf[i] < ' ') || buf[i] == 0x7F) {
- eprintf("%s contains a illegal character on line %zu at column %zu (character %zu)\n",
- fname, lineno, column, character);
+ eprintf("%s: %s contains a illegal character on line %zu at column %zu (character %zu)\n",
+ argv0, fname, lineno, column, character);
} else if (buf[i] == '\0') {
- eprintf("%s contains a NUL byte on line %zu at column %zu (character %zu)\n",
- fname, lineno, column, character);
+ eprintf("%s: %s contains a NUL byte on line %zu at column %zu (character %zu)\n",
+ argv0, fname, lineno, column, character);
} else if (!(buf[i] & 0x80)) {
character += 1;
column += 1;
} else if ((buf[i] & 0xC0) == 0x80) {
- eprintf("%s contains a illegal byte on line %zu at column %zu (character %zu)\n",
- fname, lineno, column, character);
+ eprintf("%s: %s contains a illegal byte on line %zu at column %zu (character %zu)\n",
+ argv0, fname, lineno, column, character);
} else {
if (!check_utf8(buf, &i, len)) {
- eprintf("%s contains a illegal byte sequence on line %zu at column %zu (character %zu)\n",
- fname, lineno, column, character);
+ eprintf("%s: %s contains a illegal byte sequence on line %zu at column %zu (character %zu)\n",
+ argv0, fname, lineno, column, character);
}
i--;
character += 1;
@@ -180,8 +239,8 @@ tokenise(const char *data)
} else if (data[i] == '"') {
state = STRING;
if (data[i + 1] == '"') {
- eprintf("empty string token on line %zu at column %zu (character %zu)\n",
- lineno, column, character);
+ eprintf("%s: empty string token on line %zu at column %zu (character %zu)\n",
+ argv0, lineno, column, character);
}
} else {
add_token:
@@ -189,7 +248,7 @@ tokenise(const char *data)
token = erealloc(token, token_size += 16);
token[token_len++] = '\0';
if (ntokens == tokens_size)
- tokens = ereallocn(tokens, tokens_size += 16, sizeof(*tokens), 0);
+ tokens = ereallocarray(tokens, tokens_size += 16, sizeof(*tokens));
tokens[ntokens] = emalloc(offsetof(struct token, s) + token_len);
tokens[ntokens]->lineno = token_lineno;
tokens[ntokens]->column = token_column;
@@ -212,7 +271,7 @@ tokenise(const char *data)
token = erealloc(token, token_size += 16);
token[token_len++] = '\0';
if (ntokens == tokens_size)
- tokens = ereallocn(tokens, tokens_size += 16, sizeof(*tokens), 0);
+ tokens = ereallocarray(tokens, tokens_size += 16, sizeof(*tokens));
tokens[ntokens] = emalloc(offsetof(struct token, s) + token_len);
tokens[ntokens]->lineno = token_lineno;
tokens[ntokens]->column = token_column;
@@ -226,8 +285,8 @@ tokenise(const char *data)
case STRING:
if (data[i] == '\n' || data[i] == '\t') {
- eprintf("illegal whitespace on line %zu at column %zu (character %zu)\n",
- lineno, column, character);
+ eprintf("%s: illegal whitespace on line %zu at column %zu (character %zu)\n",
+ argv0, lineno, column, character);
} else if (data[i] == '"') {
goto add_token;
} else if (data[i] == '\\') {
@@ -240,8 +299,8 @@ tokenise(const char *data)
case STRING_ESC:
if (data[i] == '\n' || data[i] == '\t') {
- eprintf("illegal whitespace on line %zu at column %zu (character %zu)\n",
- lineno, column, character);
+ eprintf("%s: illegal whitespace on line %zu at column %zu (character %zu)\n",
+ argv0, lineno, column, character);
}
if (token_len == token_size)
token = erealloc(token, token_size += 16);
@@ -274,9 +333,9 @@ tokenise(const char *data)
}
}
if (state != NEW_TOKEN && state != SPACE)
- eprintf("premature end of file\n");
+ eprintf("%s: premature end of file\n", argv0);
- tokens = ereallocn(tokens, ntokens + 1, sizeof(*tokens), 0);
+ tokens = ereallocarray(tokens, ntokens + 1, sizeof(*tokens));
tokens[ntokens] = NULL;
free(token);
@@ -324,7 +383,7 @@ emit_and_free_sentence(struct node *node, size_t *indexp)
nrule_names, index);
} else {
if (nwant_rules == want_rules_size)
- want_rules = ereallocn(want_rules, want_rules_size += 16, sizeof(*want_rules), 0);
+ want_rules = ereallocarray(want_rules, want_rules_size += 16, sizeof(*want_rules));
want_rules[nwant_rules++] = estrdup(node->token->s);
printf("static union libparser_sentence sentence_%zu_%zu = {.rule = {"
".type = LIBPARSER_SENTENCE_TYPE_RULE, .rule = \"%s\""
@@ -410,7 +469,7 @@ emit_and_free_rule(struct node *rule)
printf("static struct libparser_rule rule_%zu = {\"%s\", &sentence_%zu_0};\n", nrule_names, rule->token->s, nrule_names);
if (nrule_names == rule_names_size)
- rule_names = ereallocn(rule_names, rule_names_size += 16, sizeof(*rule_names), 0);
+ rule_names = ereallocarray(rule_names, rule_names_size += 16, sizeof(*rule_names));
rule_names[nrule_names++] = estrdup(rule->token->s);
free(rule->token);
free(rule);
@@ -464,7 +523,7 @@ again:
goto again;
}
}
- eprintf("premature end of file\n");
+ eprintf("%s: premature end of file\n", argv0);
}
if (tokens[i]->s[0] == '"') {
@@ -481,8 +540,8 @@ again:
switch (state) {
case NEW_RULE:
if (type != IDENTIFIER) {
- eprintf("expected an identifier on line %zu at column %zu (character %zu)\n",
- tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
+ eprintf("%s: expected an identifier on line %zu at column %zu (character %zu)\n",
+ argv0, tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
}
stack = calloc(1, sizeof(*stack));
stack->token = tokens[i];
@@ -490,16 +549,16 @@ again:
state = EXPECT_EQUALS;
for (j = 0; j < nrule_names; j++) {
if (!strcmp(rule_names[j], tokens[i]->s)) {
- eprintf("duplicate definition of \"%s\" on line %zu at column %zu (character %zu)\n",
- tokens[i]->s, tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
+ eprintf("%s: duplicate definition of \"%s\" on line %zu at column %zu (character %zu)\n",
+ argv0, tokens[i]->s, tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
}
}
break;
case EXPECT_EQUALS:
if (type != SYMBOL || tokens[i]->s[0] != '=') {
- eprintf("expected an '=' on line %zu at column %zu (character %zu)\n",
- tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
+ eprintf("%s: expected an '=' on line %zu at column %zu (character %zu)\n",
+ argv0, tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
}
free(tokens[i]);
state = EXPECT_OPERAND;
@@ -517,8 +576,8 @@ again:
goto add;
} else {
stray:
- eprintf("stray '%c' on line %zu at column %zu (character %zu)\n",
- tokens[i]->s[0], tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
+ eprintf("%s: stray '%c' on line %zu at column %zu (character %zu)\n",
+ argv0, tokens[i]->s[0], tokens[i]->lineno, tokens[i]->column, tokens[i]->character);
}
} else {
add:
@@ -553,15 +612,16 @@ again:
stack = stack->parent;
} else if (tokens[i]->s[0] == ';') {
if (stack->token->s[0] == ')' || stack->token->s[0] == ']' || stack->token->s[0] == '}')
- eprintf("premature end of rule on line %zu at column %zu (character %zu): "
+ eprintf("%s: premature end of rule on line %zu at column %zu (character %zu): "
"'%s' on line %zu at column %zu (character %zu) not closed\n",
- tokens[i]->lineno, tokens[i]->column, tokens[i]->character, stack->token->s,
+ argv0, tokens[i]->lineno, tokens[i]->column, tokens[i]->character, stack->token->s,
stack->token->lineno, stack->token->column, stack->token->character);
emit_and_free_rule(stack);
free(tokens[i]);
state = NEW_RULE;
} else {
- eprintf("expected a '|', ',', or '%c' on line %zu at column %zu (character %zu)\n",
+ eprintf("%s: expected a '|', ',', or '%c' on line %zu at column %zu (character %zu)\n",
+ argv0,
stack->token->s[0] == '(' ? ')' :
stack->token->s[0] == '[' ? ']' :
stack->token->s[0] == '{' ? '}' : ';',
@@ -575,7 +635,7 @@ again:
}
free(tokens);
if (state != NEW_RULE)
- eprintf("premature end of file\n");
+ eprintf("%s: premature end of file\n", argv0);
err = 0;
qsort(rule_names, nrule_names, sizeof(*rule_names), strpcmp);
@@ -588,23 +648,23 @@ again:
} else if (!strcmp(rule_names[i], argv[0])) {
i++;
} else if (cmp < 0) {
- weprintf("rule \"%s\" defined but not used\n", rule_names[i]);
+ eprintf("%s: rule \"%s\" defined but not used\n", argv0, rule_names[i]);
i++;
err = 1;
} else {
- weprintf("rule \"%s\" used but not defined\n", want_rules[j]);
+ eprintf("%s: rule \"%s\" used but not defined\n", argv0, want_rules[j]);
for (j++; j < nwant_rules && !strcmp(want_rules[j - 1], want_rules[j]); j++);
err = 1;
}
}
for (; i < nrule_names; i++) {
if (strcmp(rule_names[i], argv[0])) {
- weprintf("rule \"%s\" defined but not used\n", rule_names[i]);
+ eprintf("%s: rule \"%s\" defined but not used\n", argv0, rule_names[i]);
err = 1;
}
}
while (j < nwant_rules) {
- weprintf("rule \"%s\" used but not defined\n", want_rules[j]);
+ eprintf("%s: rule \"%s\" used but not defined\n", argv0, want_rules[j]);
for (j++; j < nwant_rules && !strcmp(want_rules[j - 1], want_rules[j]); j++);
err = 1;
}
@@ -614,7 +674,7 @@ again:
for (i = 0; i < nrule_names; i++)
if (!strcmp(rule_names[i], argv[0]))
goto found_main;
- eprintf("specified main rule (\"%s\") was not defined\n", argv[0]);
+ eprintf("%s: specified main rule (\"%s\") was not defined\n", argv0, argv[0]);
found_main:
printf("static union libparser_sentence noeof_sentence = {.type = LIBPARSER_SENTENCE_TYPE_EXCEPTION};\n");
@@ -659,6 +719,6 @@ found_main:
free(want_rules);
if (ferror(stdout) || fflush(stdout) || fclose(stdout))
- eprintf("printf:");
+ eprintf("%s: printf: %s\n", argv0, strerror(errno));
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-22 06:15:41 +0000