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-rw-r--r--ell.c99
1 files changed, 53 insertions, 46 deletions
diff --git a/ell.c b/ell.c
index 05f7948..4995a52 100644
--- a/ell.c
+++ b/ell.c
@@ -16,14 +16,14 @@
*
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
#include <ctype.h>
#include <errno.h>
+#include <setjmp.h>
#include <stdarg.h>
#include <stdbool.h>
-#include <setjmp.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
#if defined __GNUC__
#define ELL_ATTRIBUTE_PRINTF(x, y) __attribute__ ((format (printf, x, y)))
@@ -188,9 +188,18 @@ ell_list (struct ell_v *head) {
// --- Lexer -------------------------------------------------------------------
-enum ell_token { ELLT_ABORT, ELLT_LPAREN, ELLT_RPAREN,
- ELLT_LBRACKET, ELLT_RBRACKET, ELLT_LBRACE, ELLT_RBRACE,
- ELLT_STRING, ELLT_NEWLINE, ELLT_AT };
+enum ell_token {
+ ELLT_ABORT,
+ ELLT_LPAREN,
+ ELLT_RPAREN,
+ ELLT_LBRACKET,
+ ELLT_RBRACKET,
+ ELLT_LBRACE,
+ ELLT_RBRACE,
+ ELLT_STRING,
+ ELLT_NEWLINE,
+ ELLT_AT
+};
static const char *ell_token_names[] = {
[ELLT_ABORT] = "end of input",
@@ -240,8 +249,8 @@ ell_lexer_advance (struct ell_lexer *self) {
static bool
ell_lexer_hexa_escape (struct ell_lexer *self, struct ell_buffer *output) {
const char *abc = "0123456789abcdef", *h, *l;
- if (!self->len || !(h = strchr (abc, tolower (ell_lexer_advance (self))))
- || !self->len || !(l = strchr (abc, tolower (ell_lexer_advance (self)))))
+ if (!self->len || !(h = strchr (abc, tolower (ell_lexer_advance (self)))) ||
+ !self->len || !(l = strchr (abc, tolower (ell_lexer_advance (self)))))
return false;
ell_buffer_append_c (output, (h - abc) << 4 | (l - abc));
@@ -254,7 +263,8 @@ enum {
ELL_LEXER_COMMENT = '#'
};
-static bool ell_lexer_is_whitespace (int c) {
+static bool
+ell_lexer_is_whitespace (int c) {
return !c || c == ' ' || c == '\t' || c == '\r';
}
@@ -326,13 +336,12 @@ ell_lexer_next (struct ell_lexer *self, const char **e) {
enum ell_token token = ell_lexer_tokens[c];
if (!token) {
ell_buffer_append_c (&self->string, c);
- while (self->len && !ell_lexer_is_whitespace (*self->p)
- && !ell_lexer_tokens[*self->p])
+ while (self->len && !ell_lexer_is_whitespace (*self->p) &&
+ !ell_lexer_tokens[*self->p])
ell_buffer_append_c (&self->string, ell_lexer_advance (self));
return ELLT_STRING;
}
- if (token == ELLT_STRING
- && (*e = ell_lexer_string (self, &self->string)))
+ if (token == ELLT_STRING && (*e = ell_lexer_string (self, &self->string)))
return ELLT_ABORT;
return token;
}
@@ -369,8 +378,8 @@ static bool
ell_print_string_needs_quoting (struct ell_v *s) {
for (size_t i = 0; i < s->len; i++) {
unsigned char c = s->string[i];
- if (ell_lexer_is_whitespace (c) || ell_lexer_tokens[c]
- || c == ELL_LEXER_ESCAPE || c < 32)
+ if (ell_lexer_is_whitespace (c) || ell_lexer_tokens[c] ||
+ c == ELL_LEXER_ESCAPE || c < 32)
return true;
}
return s->len == 0;
@@ -426,8 +435,8 @@ ell_print_block (struct ell_printer *printer, struct ell_v *list) {
static bool
ell_print_set (struct ell_printer *printer, struct ell_v *list) {
- if (!list->head || strcmp (list->head->string, "set")
- || !list->head->next || list->head->next->next)
+ if (!list->head || strcmp (list->head->string, "set") ||
+ !list->head->next || list->head->next->next)
return false;
printer->putchar (printer, '@');
@@ -448,10 +457,10 @@ ell_print_list (struct ell_printer *printer, struct ell_v *list) {
static void
ell_print_v (struct ell_printer *printer, struct ell_v *v) {
- if (ell_print_string (printer, v)
- || ell_print_block (printer, v)
- || ell_print_set (printer, v)
- || ell_print_list (printer, v))
+ if (ell_print_string (printer, v) ||
+ ell_print_block (printer, v) ||
+ ell_print_set (printer, v) ||
+ ell_print_list (printer, v))
return;
printer->putchar (printer, '(');
@@ -563,7 +572,7 @@ ell_parse_prefix_list (struct ell_v *seq, const char *name) {
return ell_list (prefix);
}
-static struct ell_v * ell_parse_line (struct ell_parser *p, jmp_buf out);
+static struct ell_v *ell_parse_line (struct ell_parser *p, jmp_buf out);
static struct ell_v *
ell_parse_v (struct ell_parser *p, jmp_buf out) {
@@ -576,8 +585,7 @@ ell_parse_v (struct ell_parser *p, jmp_buf out) {
SKIP_NL ();
if (ACCEPT (ELLT_STRING))
- return CHECK (ell_string
- (p->lexer.string.s, p->lexer.string.len));
+ return CHECK (ell_string (p->lexer.string.s, p->lexer.string.len));
if (ACCEPT (ELLT_AT)) {
result = ell_parse_v (p, out);
return CHECK (ell_parse_prefix_list (result, "set"));
@@ -706,8 +714,8 @@ static bool
ell_scope_prepend (struct ell *ell, struct ell_v **scope, const char *name,
struct ell_v *v) {
struct ell_v *key, *pair;
- if (!ell_check (ell, (key = ell_string (name, strlen (name))))
- || !ell_check (ell, (pair = ell_list (key)))) {
+ if (!ell_check (ell, (key = ell_string (name, strlen (name)))) ||
+ !ell_check (ell, (pair = ell_list (key)))) {
ell_free_seq (v);
return false;
}
@@ -806,8 +814,8 @@ ell_eval_args (struct ell *ell,
for (; args; args = args->next) {
struct ell_v *evaluated = NULL;
// Arguments should not evaporate, default to a nil value
- if (!ell_eval_statement (ell, args, &evaluated)
- || (!evaluated && !ell_check (ell, (evaluated = ell_list (NULL)))))
+ if (!ell_eval_statement (ell, args, &evaluated) ||
+ (!evaluated && !ell_check (ell, (evaluated = ell_list (NULL)))))
goto error;
ell_free_seq (evaluated->next);
evaluated->next = NULL;
@@ -889,15 +897,14 @@ ell_eval_value (struct ell *ell, const struct ell_v *body,
}
static bool
-ell_eval_statement
- (struct ell *ell, const struct ell_v *statement, struct ell_v **result) {
+ell_eval_statement (struct ell *ell, const struct ell_v *statement,
+ struct ell_v **result) {
if (statement->type == ELL_STRING)
return ell_check (ell, (*result = ell_clone (statement)));
// Executing a nil value results in no value. It's not very different from
// calling a block that returns no value--it's for our callers to resolve.
- if (!statement->head
- || ell_eval_value (ell, statement->head, result))
+ if (!statement->head || ell_eval_value (ell, statement->head, result))
return true;
ell_free_seq (*result);
@@ -918,8 +925,8 @@ ell_eval_statement
static bool
args_to_scope (struct ell *ell, struct ell_v *args, struct ell_v **scope) {
- if (!ell_check (ell, (args = ell_list (args)))
- || !ell_scope_prepend (ell, scope, "args", args))
+ if (!ell_check (ell, (args = ell_list (args))) ||
+ !ell_scope_prepend (ell, scope, "args", args))
return false;
size_t i = 0;
@@ -927,8 +934,8 @@ args_to_scope (struct ell *ell, struct ell_v *args, struct ell_v **scope) {
char buf[16] = "";
(void) snprintf (buf, sizeof buf, "%zu", ++i);
struct ell_v *copy = NULL;
- if ((args && !ell_check (ell, (copy = ell_clone (args))))
- || !ell_scope_prepend (ell, scope, buf, copy))
+ if ((args && !ell_check (ell, (copy = ell_clone (args)))) ||
+ !ell_scope_prepend (ell, scope, buf, copy))
return false;
}
return ell_check (ell, (*scope = ell_list (*scope)));
@@ -1031,8 +1038,8 @@ ell_defn (ell_fn_local) {
struct ell_v *values = names->next;
for (names = names->head; names; names = names->next) {
struct ell_v *value = NULL;
- if ((values && !ell_check (ell, (value = ell_clone (values))))
- || !ell_scope_prepend (ell, scope, names->string, value))
+ if ((values && !ell_check (ell, (value = ell_clone (values)))) ||
+ !ell_scope_prepend (ell, scope, names->string, value))
return false;
if (values)
values = values->next;
@@ -1047,9 +1054,9 @@ ell_defn (ell_fn_set) {
struct ell_v *v;
if ((v = name->next))
- return ell_check (ell, (v = ell_clone (v)))
- && ell_check (ell, (*result = ell_clone (v)))
- && ell_set (ell, name->string, v);
+ return ell_check (ell, (v = ell_clone (v))) &&
+ ell_check (ell, (*result = ell_clone (v))) &&
+ ell_set (ell, name->string, v);
// We return an empty list for a nil value
if (!(v = ell_get (ell, name->string)))
@@ -1139,8 +1146,8 @@ ell_defn (ell_fn_cat) {
else
ell_buffer_append (&buf, args->string, args->len);
}
- bool ok = !(ell->memory_failure |= buf.memory_failure)
- && ell_check (ell, (*result = ell_string (buf.s, buf.len)));
+ bool ok = !(ell->memory_failure |= buf.memory_failure) &&
+ ell_check (ell, (*result = ell_string (buf.s, buf.len)));
free (buf.s);
return ok;
}
@@ -1178,8 +1185,8 @@ ell_defn (ell_fn_try) {
return true;
struct ell_v *msg;
- if (ell->memory_failure
- || !ell_check (ell, (msg = ell_string (ell->error, strlen (ell->error)))))
+ if (ell->memory_failure ||
+ !ell_check (ell, (msg = ell_string (ell->error, strlen (ell->error)))))
return false;
free (ell->error); ell->error = NULL;
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-01 02:18:53 +0000