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-rw-r--r--edify/expr.c506
1 files changed, 249 insertions, 257 deletions
diff --git a/edify/expr.c b/edify/expr.c
index 5470a2bac..406c67ea6 100644
--- a/edify/expr.c
+++ b/edify/expr.c
@@ -29,249 +29,241 @@
// - if Evaluate() on any argument returns NULL, return NULL.
int BooleanString(const char* s) {
- return s[0] != '\0';
+ return s[0] != '\0';
}
-char* Evaluate(void* cookie, Expr* expr) {
- return expr->fn(expr->name, cookie, expr->argc, expr->argv);
+char* Evaluate(State* state, Expr* expr) {
+ return expr->fn(expr->name, state, expr->argc, expr->argv);
}
-char* ConcatFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- if (argc == 0) {
- return strdup("");
- }
- char** strings = malloc(argc * sizeof(char*));
- int i;
- for (i = 0; i < argc; ++i) {
- strings[i] = NULL;
- }
- char* result = NULL;
- int length = 0;
- for (i = 0; i < argc; ++i) {
- strings[i] = Evaluate(cookie, argv[i]);
- if (strings[i] == NULL) {
- goto done;
+char* ConcatFn(const char* name, State* state, int argc, Expr* argv[]) {
+ if (argc == 0) {
+ return strdup("");
+ }
+ char** strings = malloc(argc * sizeof(char*));
+ int i;
+ for (i = 0; i < argc; ++i) {
+ strings[i] = NULL;
+ }
+ char* result = NULL;
+ int length = 0;
+ for (i = 0; i < argc; ++i) {
+ strings[i] = Evaluate(state, argv[i]);
+ if (strings[i] == NULL) {
+ goto done;
+ }
+ length += strlen(strings[i]);
+ }
+
+ result = malloc(length+1);
+ int p = 0;
+ for (i = 0; i < argc; ++i) {
+ strcpy(result+p, strings[i]);
+ p += strlen(strings[i]);
+ }
+ result[p] = '\0';
+
+ done:
+ for (i = 0; i < argc; ++i) {
+ free(strings[i]);
}
- length += strlen(strings[i]);
- }
-
- result = malloc(length+1);
- int p = 0;
- for (i = 0; i < argc; ++i) {
- strcpy(result+p, strings[i]);
- p += strlen(strings[i]);
- }
- result[p] = '\0';
-
-done:
- for (i = 0; i < argc; ++i) {
- free(strings[i]);
- }
- return result;
+ return result;
}
-char* IfElseFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- if (argc != 2 && argc != 3) {
- return NULL;
- }
- char* cond = Evaluate(cookie, argv[0]);
- if (cond == NULL) {
- return NULL;
- }
-
- if (BooleanString(cond) == true) {
- free(cond);
- return Evaluate(cookie, argv[1]);
- } else {
- if (argc == 3) {
- free(cond);
- return Evaluate(cookie, argv[2]);
+char* IfElseFn(const char* name, State* state, int argc, Expr* argv[]) {
+ if (argc != 2 && argc != 3) {
+ return NULL;
+ }
+ char* cond = Evaluate(state, argv[0]);
+ if (cond == NULL) {
+ return NULL;
+ }
+
+ if (BooleanString(cond) == true) {
+ free(cond);
+ return Evaluate(state, argv[1]);
} else {
- return cond;
+ if (argc == 3) {
+ free(cond);
+ return Evaluate(state, argv[2]);
+ } else {
+ return cond;
+ }
}
- }
}
-char* AbortFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- char* msg = NULL;
- if (argc > 0) {
- msg = Evaluate(cookie, argv[0]);
- }
- SetError(msg == NULL ? "called abort()" : msg);
- free(msg);
- return NULL;
+char* AbortFn(const char* name, State* state, int argc, Expr* argv[]) {
+ char* msg = NULL;
+ if (argc > 0) {
+ msg = Evaluate(state, argv[0]);
+ }
+ free(state->errmsg);
+ if (msg) {
+ state->errmsg = msg;
+ } else {
+ state->errmsg = strdup("called abort()");
+ }
+ return NULL;
}
-char* AssertFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- int i;
- for (i = 0; i < argc; ++i) {
- char* v = Evaluate(cookie, argv[i]);
- if (v == NULL) {
- return NULL;
- }
- int b = BooleanString(v);
- free(v);
- if (!b) {
- SetError("assert() failed");
- return NULL;
+char* AssertFn(const char* name, State* state, int argc, Expr* argv[]) {
+ int i;
+ for (i = 0; i < argc; ++i) {
+ char* v = Evaluate(state, argv[i]);
+ if (v == NULL) {
+ return NULL;
+ }
+ int b = BooleanString(v);
+ free(v);
+ if (!b) {
+ int prefix_len;
+ int len = argv[i]->end - argv[i]->start;
+ char* err_src = malloc(len + 20);
+ strcpy(err_src, "assert failed: ");
+ prefix_len = strlen(err_src);
+ memcpy(err_src + prefix_len, state->script + argv[i]->start, len);
+ err_src[prefix_len + len] = '\0';
+ free(state->errmsg);
+ state->errmsg = err_src;
+ return NULL;
+ }
}
- }
- return strdup("");
+ return strdup("");
}
-char* SleepFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- char* val = Evaluate(cookie, argv[0]);
- if (val == NULL) {
- return NULL;
- }
- int v = strtol(val, NULL, 10);
- sleep(v);
- return val;
+char* SleepFn(const char* name, State* state, int argc, Expr* argv[]) {
+ char* val = Evaluate(state, argv[0]);
+ if (val == NULL) {
+ return NULL;
+ }
+ int v = strtol(val, NULL, 10);
+ sleep(v);
+ return val;
}
-char* PrintFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- int i;
- for (i = 0; i < argc; ++i) {
- char* v = Evaluate(cookie, argv[i]);
- if (v == NULL) {
- return NULL;
+char* StdoutFn(const char* name, State* state, int argc, Expr* argv[]) {
+ int i;
+ for (i = 0; i < argc; ++i) {
+ char* v = Evaluate(state, argv[i]);
+ if (v == NULL) {
+ return NULL;
+ }
+ fputs(v, stdout);
+ free(v);
}
- fputs(v, stdout);
- free(v);
- }
- return strdup("");
+ return strdup("");
}
-char* LogicalAndFn(const char* name, void* cookie,
+char* LogicalAndFn(const char* name, State* state,
int argc, Expr* argv[]) {
- char* left = Evaluate(cookie, argv[0]);
- if (left == NULL) return NULL;
- if (BooleanString(left) == true) {
- free(left);
- return Evaluate(cookie, argv[1]);
- } else {
- return left;
- }
+ char* left = Evaluate(state, argv[0]);
+ if (left == NULL) return NULL;
+ if (BooleanString(left) == true) {
+ free(left);
+ return Evaluate(state, argv[1]);
+ } else {
+ return left;
+ }
}
-char* LogicalOrFn(const char* name, void* cookie,
+char* LogicalOrFn(const char* name, State* state,
int argc, Expr* argv[]) {
- char* left = Evaluate(cookie, argv[0]);
- if (left == NULL) return NULL;
- if (BooleanString(left) == false) {
- free(left);
- return Evaluate(cookie, argv[1]);
- } else {
- return left;
- }
+ char* left = Evaluate(state, argv[0]);
+ if (left == NULL) return NULL;
+ if (BooleanString(left) == false) {
+ free(left);
+ return Evaluate(state, argv[1]);
+ } else {
+ return left;
+ }
}
-char* LogicalNotFn(const char* name, void* cookie,
- int argc, Expr* argv[]) {
- char* val = Evaluate(cookie, argv[0]);
- if (val == NULL) return NULL;
- bool bv = BooleanString(val);
- free(val);
- if (bv) {
- return strdup("");
- } else {
- return strdup("t");
- }
+char* LogicalNotFn(const char* name, State* state,
+ int argc, Expr* argv[]) {
+ char* val = Evaluate(state, argv[0]);
+ if (val == NULL) return NULL;
+ bool bv = BooleanString(val);
+ free(val);
+ if (bv) {
+ return strdup("");
+ } else {
+ return strdup("t");
+ }
}
-char* SubstringFn(const char* name, void* cookie,
+char* SubstringFn(const char* name, State* state,
int argc, Expr* argv[]) {
- char* needle = Evaluate(cookie, argv[0]);
- if (needle == NULL) return NULL;
- char* haystack = Evaluate(cookie, argv[1]);
- if (haystack == NULL) {
- free(needle);
- return NULL;
- }
+ char* needle = Evaluate(state, argv[0]);
+ if (needle == NULL) return NULL;
+ char* haystack = Evaluate(state, argv[1]);
+ if (haystack == NULL) {
+ free(needle);
+ return NULL;
+ }
- char* result = strdup(strstr(haystack, needle) ? "t" : "");
- free(needle);
- free(haystack);
- return result;
+ char* result = strdup(strstr(haystack, needle) ? "t" : "");
+ free(needle);
+ free(haystack);
+ return result;
}
-char* EqualityFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- char* left = Evaluate(cookie, argv[0]);
- if (left == NULL) return NULL;
- char* right = Evaluate(cookie, argv[1]);
- if (right == NULL) {
- free(left);
- return NULL;
- }
-
- char* result = strdup(strcmp(left, right) == 0 ? "t" : "");
- free(left);
- free(right);
- return result;
-}
+char* EqualityFn(const char* name, State* state, int argc, Expr* argv[]) {
+ char* left = Evaluate(state, argv[0]);
+ if (left == NULL) return NULL;
+ char* right = Evaluate(state, argv[1]);
+ if (right == NULL) {
+ free(left);
+ return NULL;
+ }
-char* InequalityFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- char* left = Evaluate(cookie, argv[0]);
- if (left == NULL) return NULL;
- char* right = Evaluate(cookie, argv[1]);
- if (right == NULL) {
+ char* result = strdup(strcmp(left, right) == 0 ? "t" : "");
free(left);
- return NULL;
- }
-
- char* result = strdup(strcmp(left, right) != 0 ? "t" : "");
- free(left);
- free(right);
- return result;
+ free(right);
+ return result;
}
-char* SequenceFn(const char* name, void* cookie, int argc, Expr* argv[]) {
- char* left = Evaluate(cookie, argv[0]);
- if (left == NULL) return NULL;
- free(left);
- return Evaluate(cookie, argv[1]);
-}
-
-char* Literal(const char* name, void* cookie, int argc, Expr* argv[]) {
- return strdup(name);
-}
+char* InequalityFn(const char* name, State* state, int argc, Expr* argv[]) {
+ char* left = Evaluate(state, argv[0]);
+ if (left == NULL) return NULL;
+ char* right = Evaluate(state, argv[1]);
+ if (right == NULL) {
+ free(left);
+ return NULL;
+ }
-Expr* Build(Function fn, int count, ...) {
- va_list v;
- va_start(v, count);
- Expr* e = malloc(sizeof(Expr));
- e->fn = fn;
- e->name = "(operator)";
- e->argc = count;
- e->argv = malloc(count * sizeof(Expr*));
- int i;
- for (i = 0; i < count; ++i) {
- e->argv[i] = va_arg(v, Expr*);
- }
- va_end(v);
- return e;
+ char* result = strdup(strcmp(left, right) != 0 ? "t" : "");
+ free(left);
+ free(right);
+ return result;
}
-// -----------------------------------------------------------------
-// error reporting
-// -----------------------------------------------------------------
-
-static char* error_message = NULL;
-
-void SetError(const char* message) {
- if (error_message) {
- free(error_message);
- }
- error_message = strdup(message);
+char* SequenceFn(const char* name, State* state, int argc, Expr* argv[]) {
+ char* left = Evaluate(state, argv[0]);
+ if (left == NULL) return NULL;
+ free(left);
+ return Evaluate(state, argv[1]);
}
-const char* GetError() {
- return error_message;
+char* Literal(const char* name, State* state, int argc, Expr* argv[]) {
+ return strdup(name);
}
-void ClearError() {
- free(error_message);
- error_message = NULL;
+Expr* Build(Function fn, YYLTYPE loc, int count, ...) {
+ va_list v;
+ va_start(v, count);
+ Expr* e = malloc(sizeof(Expr));
+ e->fn = fn;
+ e->name = "(operator)";
+ e->argc = count;
+ e->argv = malloc(count * sizeof(Expr*));
+ int i;
+ for (i = 0; i < count; ++i) {
+ e->argv[i] = va_arg(v, Expr*);
+ }
+ va_end(v);
+ e->start = loc.start;
+ e->end = loc.end;
+ return e;
}
// -----------------------------------------------------------------
@@ -283,44 +275,44 @@ static int fn_size = 0;
NamedFunction* fn_table = NULL;
void RegisterFunction(const char* name, Function fn) {
- if (fn_entries >= fn_size) {
- fn_size = fn_size*2 + 1;
- fn_table = realloc(fn_table, fn_size * sizeof(NamedFunction));
- }
- fn_table[fn_entries].name = name;
- fn_table[fn_entries].fn = fn;
- ++fn_entries;
+ if (fn_entries >= fn_size) {
+ fn_size = fn_size*2 + 1;
+ fn_table = realloc(fn_table, fn_size * sizeof(NamedFunction));
+ }
+ fn_table[fn_entries].name = name;
+ fn_table[fn_entries].fn = fn;
+ ++fn_entries;
}
static int fn_entry_compare(const void* a, const void* b) {
- const char* na = ((const NamedFunction*)a)->name;
- const char* nb = ((const NamedFunction*)b)->name;
- return strcmp(na, nb);
+ const char* na = ((const NamedFunction*)a)->name;
+ const char* nb = ((const NamedFunction*)b)->name;
+ return strcmp(na, nb);
}
void FinishRegistration() {
- qsort(fn_table, fn_entries, sizeof(NamedFunction), fn_entry_compare);
+ qsort(fn_table, fn_entries, sizeof(NamedFunction), fn_entry_compare);
}
Function FindFunction(const char* name) {
- NamedFunction key;
- key.name = name;
- NamedFunction* nf = bsearch(&key, fn_table, fn_entries, sizeof(NamedFunction),
- fn_entry_compare);
- if (nf == NULL) {
- return NULL;
- }
- return nf->fn;
+ NamedFunction key;
+ key.name = name;
+ NamedFunction* nf = bsearch(&key, fn_table, fn_entries,
+ sizeof(NamedFunction), fn_entry_compare);
+ if (nf == NULL) {
+ return NULL;
+ }
+ return nf->fn;
}
void RegisterBuiltins() {
- RegisterFunction("ifelse", IfElseFn);
- RegisterFunction("abort", AbortFn);
- RegisterFunction("assert", AssertFn);
- RegisterFunction("concat", ConcatFn);
- RegisterFunction("is_substring", SubstringFn);
- RegisterFunction("print", PrintFn);
- RegisterFunction("sleep", SleepFn);
+ RegisterFunction("ifelse", IfElseFn);
+ RegisterFunction("abort", AbortFn);
+ RegisterFunction("assert", AssertFn);
+ RegisterFunction("concat", ConcatFn);
+ RegisterFunction("is_substring", SubstringFn);
+ RegisterFunction("stdout", StdoutFn);
+ RegisterFunction("sleep", SleepFn);
}
@@ -331,44 +323,44 @@ void RegisterBuiltins() {
// Evaluate the expressions in argv, giving 'count' char* (the ... is
// zero or more char** to put them in). If any expression evaluates
// to NULL, free the rest and return -1. Return 0 on success.
-int ReadArgs(void* cookie, Expr* argv[], int count, ...) {
- char** args = malloc(count * sizeof(char*));
- va_list v;
- va_start(v, count);
- int i;
- for (i = 0; i < count; ++i) {
- args[i] = Evaluate(cookie, argv[i]);
- if (args[i] == NULL) {
- va_end(v);
- int j;
- for (j = 0; j < i; ++j) {
- free(args[j]);
- }
- return -1;
+int ReadArgs(State* state, Expr* argv[], int count, ...) {
+ char** args = malloc(count * sizeof(char*));
+ va_list v;
+ va_start(v, count);
+ int i;
+ for (i = 0; i < count; ++i) {
+ args[i] = Evaluate(state, argv[i]);
+ if (args[i] == NULL) {
+ va_end(v);
+ int j;
+ for (j = 0; j < i; ++j) {
+ free(args[j]);
+ }
+ return -1;
+ }
+ *(va_arg(v, char**)) = args[i];
}
- *(va_arg(v, char**)) = args[i];
- }
- va_end(v);
- return 0;
+ va_end(v);
+ return 0;
}
// Evaluate the expressions in argv, returning an array of char*
// results. If any evaluate to NULL, free the rest and return NULL.
// The caller is responsible for freeing the returned array and the
// strings it contains.
-char** ReadVarArgs(void* cookie, int argc, Expr* argv[]) {
- char** args = (char**)malloc(argc * sizeof(char*));
- int i = 0;
- for (i = 0; i < argc; ++i) {
- args[i] = Evaluate(cookie, argv[i]);
- if (args[i] == NULL) {
- int j;
- for (j = 0; j < i; ++j) {
- free(args[j]);
- }
- free(args);
- return NULL;
+char** ReadVarArgs(State* state, int argc, Expr* argv[]) {
+ char** args = (char**)malloc(argc * sizeof(char*));
+ int i = 0;
+ for (i = 0; i < argc; ++i) {
+ args[i] = Evaluate(state, argv[i]);
+ if (args[i] == NULL) {
+ int j;
+ for (j = 0; j < i; ++j) {
+ free(args[j]);
+ }
+ free(args);
+ return NULL;
+ }
}
- }
- return args;
+ return args;
}
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