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-rw-r--r--edify/expr.c506
-rw-r--r--edify/expr.h61
-rw-r--r--edify/lexer.l47
-rw-r--r--edify/main.c301
-rw-r--r--edify/parser.y31
-rw-r--r--edify/yydefs.h36
6 files changed, 540 insertions, 442 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;
}
diff --git a/edify/expr.h b/edify/expr.h
index cfbef903b..671b499b5 100644
--- a/edify/expr.h
+++ b/edify/expr.h
@@ -17,45 +17,64 @@
#ifndef _EXPRESSION_H
#define _EXPRESSION_H
+#include "yydefs.h"
+
#define MAX_STRING_LEN 1024
typedef struct Expr Expr;
-typedef char* (*Function)(const char* name, void* cookie,
+typedef struct {
+ // Optional pointer to app-specific data; the core of edify never
+ // uses this value.
+ void* cookie;
+
+ // The source of the original script. Must be NULL-terminated,
+ // and in writable memory (Evaluate may make temporary changes to
+ // it but will restore it when done).
+ char* script;
+
+ // The error message (if any) returned if the evaluation aborts.
+ // Should be NULL initially, will be either NULL or a malloc'd
+ // pointer after Evaluate() returns.
+ char* errmsg;
+} State;
+
+typedef char* (*Function)(const char* name, State* state,
int argc, Expr* argv[]);
struct Expr {
- Function fn;
- char* name;
- int argc;
- Expr** argv;
+ Function fn;
+ char* name;
+ int argc;
+ Expr** argv;
+ int start, end;
};
-char* Evaluate(void* cookie, Expr* expr);
+char* Evaluate(State* state, Expr* expr);
// Glue to make an Expr out of a literal.
-char* Literal(const char* name, void* cookie, int argc, Expr* argv[]);
+char* Literal(const char* name, State* state, int argc, Expr* argv[]);
// Functions corresponding to various syntactic sugar operators.
// ("concat" is also available as a builtin function, to concatenate
// more than two strings.)
-char* ConcatFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* LogicalAndFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* LogicalOrFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* LogicalNotFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* SubstringFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* EqualityFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* InequalityFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* SequenceFn(const char* name, void* cookie, int argc, Expr* argv[]);
+char* ConcatFn(const char* name, State* state, int argc, Expr* argv[]);
+char* LogicalAndFn(const char* name, State* state, int argc, Expr* argv[]);
+char* LogicalOrFn(const char* name, State* state, int argc, Expr* argv[]);
+char* LogicalNotFn(const char* name, State* state, int argc, Expr* argv[]);
+char* SubstringFn(const char* name, State* state, int argc, Expr* argv[]);
+char* EqualityFn(const char* name, State* state, int argc, Expr* argv[]);
+char* InequalityFn(const char* name, State* state, int argc, Expr* argv[]);
+char* SequenceFn(const char* name, State* state, int argc, Expr* argv[]);
// Convenience function for building expressions with a fixed number
// of arguments.
-Expr* Build(Function fn, int count, ...);
+Expr* Build(Function fn, YYLTYPE loc, int count, ...);
// Global builtins, registered by RegisterBuiltins().
-char* IfElseFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* AssertFn(const char* name, void* cookie, int argc, Expr* argv[]);
-char* AbortFn(const char* name, void* cookie, int argc, Expr* argv[]);
+char* IfElseFn(const char* name, State* state, int argc, Expr* argv[]);
+char* AssertFn(const char* name, State* state, int argc, Expr* argv[]);
+char* AbortFn(const char* name, State* state, int argc, Expr* argv[]);
// For setting and getting the global error string (when returning
@@ -91,13 +110,13 @@ Function FindFunction(const char* name);
// 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, ...);
+int ReadArgs(State* state, Expr* argv[], int count, ...);
// 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** ReadVarArgs(State* state, int argc, Expr* argv[]);
#endif // _EXPRESSION_H
diff --git a/edify/lexer.l b/edify/lexer.l
index cb5eb318a..2c4489cc6 100644
--- a/edify/lexer.l
+++ b/edify/lexer.l
@@ -16,14 +16,20 @@
*/
#include "expr.h"
+#include "yydefs.h"
#include "parser.h"
int gLine = 1;
int gColumn = 1;
+int gPos = 0;
// TODO: enforce MAX_STRING_LEN during lexing
char string_buffer[MAX_STRING_LEN];
char* string_pos;
+
+#define ADVANCE do {yylloc.start=gPos; yylloc.end=gPos+yyleng; \
+ gColumn+=yyleng; gPos+=yyleng;} while(0)
+
%}
%x STR
@@ -34,27 +40,32 @@ char* string_pos;
\" {
- ++gColumn;
BEGIN(STR);
string_pos = string_buffer;
+ yylloc.start = gPos;
+ ++gColumn;
+ ++gPos;
}
<STR>{
\" {
++gColumn;
+ ++gPos;
BEGIN(INITIAL);
*string_pos = '\0';
yylval.str = strdup(string_buffer);
+ yylloc.end = gPos;
return STRING;
}
- \\n { gColumn += yyleng; *string_pos++ = '\n'; }
- \\t { gColumn += yyleng; *string_pos++ = '\t'; }
- \\\" { gColumn += yyleng; *string_pos++ = '\"'; }
- \\\\ { gColumn += yyleng; *string_pos++ = '\\'; }
+ \\n { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\n'; }
+ \\t { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\t'; }
+ \\\" { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\"'; }
+ \\\\ { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\\'; }
\\x[0-9a-fA-F]{2} {
gColumn += yyleng;
+ gPos += yyleng;
int val;
sscanf(yytext+2, "%x", &val);
*string_pos++ = val;
@@ -62,36 +73,38 @@ char* string_pos;
\n {
++gLine;
+ ++gPos;
gColumn = 1;
*string_pos++ = yytext[0];
}
. {
++gColumn;
+ ++gPos;
*string_pos++ = yytext[0];
}
}
-if { gColumn += yyleng; return IF; }
-then { gColumn += yyleng; return THEN; }
-else { gColumn += yyleng; return ELSE; }
-endif { gColumn += yyleng; return ENDIF; }
+if ADVANCE; return IF;
+then ADVANCE; return THEN;
+else ADVANCE; return ELSE;
+endif ADVANCE; return ENDIF;
[a-zA-Z0-9_:/.]+ {
- gColumn += yyleng;
+ ADVANCE;
yylval.str = strdup(yytext);
return STRING;
}
-\&\& { gColumn += yyleng; return AND; }
-\|\| { gColumn += yyleng; return OR; }
-== { gColumn += yyleng; return EQ; }
-!= { gColumn += yyleng; return NE; }
+\&\& ADVANCE; return AND;
+\|\| ADVANCE; return OR;
+== ADVANCE; return EQ;
+!= ADVANCE; return NE;
-[+(),!;] { gColumn += yyleng; return yytext[0]; }
+[+(),!;] ADVANCE; return yytext[0];
-[ \t]+ gColumn += yyleng;
+[ \t]+ ADVANCE;
-(#.*)?\n { ++gLine; gColumn = 1; }
+(#.*)?\n gPos += yyleng; ++gLine; gColumn = 1;
. return BAD;
diff --git a/edify/main.c b/edify/main.c
index 7da89e2ea..03eefc69e 100644
--- a/edify/main.c
+++ b/edify/main.c
@@ -21,152 +21,183 @@
#include "expr.h"
#include "parser.h"
-int expect(const char* expr_str, const char* expected, int* errors) {
- Expr* e;
- int error;
- char* result;
+extern int yyparse(Expr** root, int* error_count);
- printf(".");
+int expect(const char* expr_str, const char* expected, int* errors) {
+ Expr* e;
+ int error;
+ char* result;
+
+ printf(".");
+
+ yy_scan_string(expr_str);
+ int error_count = 0;
+ error = yyparse(&e, &error_count);
+ if (error > 0 || error_count > 0) {
+ fprintf(stderr, "error parsing \"%s\" (%d errors)\n",
+ expr_str, error_count);
+ ++*errors;
+ return 0;
+ }
- yy_scan_string(expr_str);
- error = yyparse(&e);
- if (error > 0) {
- fprintf(stderr, "error parsing \"%s\"\n", expr_str);
- ++*errors;
- return 0;
- }
+ State state;
+ state.cookie = NULL;
+ state.script = expr_str;
+ state.errmsg = NULL;
+
+ result = Evaluate(&state, e);
+ free(state.errmsg);
+ if (result == NULL && expected != NULL) {
+ fprintf(stderr, "error evaluating \"%s\"\n", expr_str);
+ ++*errors;
+ return 0;
+ }
- result = Evaluate(NULL, e);
- if (result == NULL && expected != NULL) {
- fprintf(stderr, "error evaluating \"%s\"\n", expr_str);
- ++*errors;
- return 0;
- }
+ if (result == NULL && expected == NULL) {
+ return 1;
+ }
- if (result == NULL && expected == NULL) {
- return 1;
- }
+ if (strcmp(result, expected) != 0) {
+ fprintf(stderr, "evaluating \"%s\": expected \"%s\", got \"%s\"\n",
+ expr_str, expected, result);
+ ++*errors;
+ free(result);
+ return 0;
+ }
- if (strcmp(result, expected) != 0) {
- fprintf(stderr, "evaluating \"%s\": expected \"%s\", got \"%s\"\n",
- expr_str, expected, result);
- ++*errors;
free(result);
- return 0;
- }
-
- free(result);
- return 1;
+ return 1;
}
int test() {
- int errors = 0;
-
- expect("a", "a", &errors);
- expect("\"a\"", "a", &errors);
- expect("\"\\x61\"", "a", &errors);
- expect("# this is a comment\n"
- " a\n"
- " \n",
- "a", &errors);
-
-
- // sequence operator
- expect("a; b; c", "c", &errors);
-
- // string concat operator
- expect("a + b", "ab", &errors);
- expect("a + \n \"b\"", "ab", &errors);
- expect("a + b +\nc\n", "abc", &errors);
-
- // string concat function
- expect("concat(a, b)", "ab", &errors);
- expect("concat(a,\n \"b\")", "ab", &errors);
- expect("concat(a + b,\nc,\"d\")", "abcd", &errors);
- expect("\"concat\"(a + b,\nc,\"d\")", "abcd", &errors);
-
- // logical and
- expect("a && b", "b", &errors);
- expect("a && \"\"", "", &errors);
- expect("\"\" && b", "", &errors);
- expect("\"\" && \"\"", "", &errors);
- expect("\"\" && abort()", "", &errors); // test short-circuiting
- expect("t && abort()", NULL, &errors);
-
- // logical or
- expect("a || b", "a", &errors);
- expect("a || \"\"", "a", &errors);
- expect("\"\" || b", "b", &errors);
- expect("\"\" || \"\"", "", &errors);
- expect("a || abort()", "a", &errors); // test short-circuiting
- expect("\"\" || abort()", NULL, &errors);
-
- // logical not
- expect("!a", "", &errors);
- expect("! \"\"", "t", &errors);
- expect("!!a", "t", &errors);
-
- // precedence
- expect("\"\" == \"\" && b", "b", &errors);
- expect("a + b == ab", "t", &errors);
- expect("ab == a + b", "t", &errors);
- expect("a + (b == ab)", "a", &errors);
- expect("(ab == a) + b", "b", &errors);
-
- // substring function
- expect("is_substring(cad, abracadabra)", "t", &errors);
- expect("is_substring(abrac, abracadabra)", "t", &errors);
- expect("is_substring(dabra, abracadabra)", "t", &errors);
- expect("is_substring(cad, abracxadabra)", "", &errors);
- expect("is_substring(abrac, axbracadabra)", "", &errors);
- expect("is_substring(dabra, abracadabrxa)", "", &errors);
-
- // ifelse function
- expect("ifelse(t, yes, no)", "yes", &errors);
- expect("ifelse(!t, yes, no)", "no", &errors);
- expect("ifelse(t, yes, abort())", "yes", &errors);
- expect("ifelse(!t, abort(), no)", "no", &errors);
-
- // if "statements"
- expect("if t then yes else no endif", "yes", &errors);
- expect("if \"\" then yes else no endif", "no", &errors);
- expect("if \"\" then yes endif", "", &errors);
- expect("if \"\"; t then yes endif", "yes", &errors);
-
- printf("\n");
-
- return errors;
+ int errors = 0;
+
+ expect("a", "a", &errors);
+ expect("\"a\"", "a", &errors);
+ expect("\"\\x61\"", "a", &errors);
+ expect("# this is a comment\n"
+ " a\n"
+ " \n",
+ "a", &errors);
+
+
+ // sequence operator
+ expect("a; b; c", "c", &errors);
+
+ // string concat operator
+ expect("a + b", "ab", &errors);
+ expect("a + \n \"b\"", "ab", &errors);
+ expect("a + b +\nc\n", "abc", &errors);
+
+ // string concat function
+ expect("concat(a, b)", "ab", &errors);
+ expect("concat(a,\n \"b\")", "ab", &errors);
+ expect("concat(a + b,\nc,\"d\")", "abcd", &errors);
+ expect("\"concat\"(a + b,\nc,\"d\")", "abcd", &errors);
+
+ // logical and
+ expect("a && b", "b", &errors);
+ expect("a && \"\"", "", &errors);
+ expect("\"\" && b", "", &errors);
+ expect("\"\" && \"\"", "", &errors);
+ expect("\"\" && abort()", "", &errors); // test short-circuiting
+ expect("t && abort()", NULL, &errors);
+
+ // logical or
+ expect("a || b", "a", &errors);
+ expect("a || \"\"", "a", &errors);
+ expect("\"\" || b", "b", &errors);
+ expect("\"\" || \"\"", "", &errors);
+ expect("a || abort()", "a", &errors); // test short-circuiting
+ expect("\"\" || abort()", NULL, &errors);
+
+ // logical not
+ expect("!a", "", &errors);
+ expect("! \"\"", "t", &errors);
+ expect("!!a", "t", &errors);
+
+ // precedence
+ expect("\"\" == \"\" && b", "b", &errors);
+ expect("a + b == ab", "t", &errors);
+ expect("ab == a + b", "t", &errors);
+ expect("a + (b == ab)", "a", &errors);
+ expect("(ab == a) + b", "b", &errors);
+
+ // substring function
+ expect("is_substring(cad, abracadabra)", "t", &errors);
+ expect("is_substring(abrac, abracadabra)", "t", &errors);
+ expect("is_substring(dabra, abracadabra)", "t", &errors);
+ expect("is_substring(cad, abracxadabra)", "", &errors);
+ expect("is_substring(abrac, axbracadabra)", "", &errors);
+ expect("is_substring(dabra, abracadabrxa)", "", &errors);
+
+ // ifelse function
+ expect("ifelse(t, yes, no)", "yes", &errors);
+ expect("ifelse(!t, yes, no)", "no", &errors);
+ expect("ifelse(t, yes, abort())", "yes", &errors);
+ expect("ifelse(!t, abort(), no)", "no", &errors);
+
+ // if "statements"
+ expect("if t then yes else no endif", "yes", &errors);
+ expect("if \"\" then yes else no endif", "no", &errors);
+ expect("if \"\" then yes endif", "", &errors);
+ expect("if \"\"; t then yes endif", "yes", &errors);
+
+ printf("\n");
+
+ return errors;
+}
+
+void ExprDump(int depth, Expr* n, char* script) {
+ printf("%*s", depth*2, "");
+ char temp = script[n->end];
+ script[n->end] = '\0';
+ printf("%s %p (%d-%d) \"%s\"\n",
+ n->name == NULL ? "(NULL)" : n->name, n->fn, n->start, n->end,
+ script+n->start);
+ script[n->end] = temp;
+ int i;
+ for (i = 0; i < n->argc; ++i) {
+ ExprDump(depth+1, n->argv[i], script);
+ }
}
int main(int argc, char** argv) {
- RegisterBuiltins();
- FinishRegistration();
-
- if (argc == 1) {
- return test() != 0;
- }
-
- FILE* f = fopen(argv[1], "r");
- char buffer[8192];
- int size = fread(buffer, 1, 8191, f);
- fclose(f);
- buffer[size] = '\0';
-
- Expr* root;
- int error_count = 0;
- yy_scan_bytes(buffer, size);
- int error = yyparse(&root, &error_count);
- printf("parse returned %d; %d errors encountered\n", error, error_count);
- if (error == 0 || error_count > 0) {
- char* result = Evaluate(NULL, root);
- if (result == NULL) {
- char* errmsg = GetError();
- printf("result was NULL, message is: %s\n",
- (errmsg == NULL ? "(NULL)" : errmsg));
- ClearError();
- } else {
- printf("result is [%s]\n", result);
+ RegisterBuiltins();
+ FinishRegistration();
+
+ if (argc == 1) {
+ return test() != 0;
+ }
+
+ FILE* f = fopen(argv[1], "r");
+ char buffer[8192];
+ int size = fread(buffer, 1, 8191, f);
+ fclose(f);
+ buffer[size] = '\0';
+
+ Expr* root;
+ int error_count = 0;
+ yy_scan_bytes(buffer, size);
+ int error = yyparse(&root, &error_count);
+ printf("parse returned %d; %d errors encountered\n", error, error_count);
+ if (error == 0 || error_count > 0) {
+
+ ExprDump(0, root, buffer);
+
+ State state;
+ state.cookie = NULL;
+ state.script = buffer;
+ state.errmsg = NULL;
+
+ char* result = Evaluate(&state, root);
+ if (result == NULL) {
+ printf("result was NULL, message is: %s\n",
+ (state.errmsg == NULL ? "(NULL)" : state.errmsg));
+ free(state.errmsg);
+ } else {
+ printf("result is [%s]\n", result);
+ }
}
- }
- return 0;
+ return 0;
}
diff --git a/edify/parser.y b/edify/parser.y
index cf163c026..3f9ade144 100644
--- a/edify/parser.y
+++ b/edify/parser.y
@@ -20,6 +20,7 @@
#include <string.h>
#include "expr.h"
+#include "yydefs.h"
#include "parser.h"
extern int gLine;
@@ -30,6 +31,8 @@ int yyparse(Expr** root, int* error_count);
%}
+%locations
+
%union {
char* str;
Expr* expr;
@@ -68,19 +71,21 @@ expr: STRING {
$$->name = $1;
$$->argc = 0;
$$->argv = NULL;
+ $$->start = @$.start;
+ $$->end = @$.end;
}
-| '(' expr ')' { $$ = $2; }
-| expr ';' { $$ = $1; }
-| expr ';' expr { $$ = Build(SequenceFn, 2, $1, $3); }
-| error ';' expr { $$ = $3; }
-| expr '+' expr { $$ = Build(ConcatFn, 2, $1, $3); }
-| expr EQ expr { $$ = Build(EqualityFn, 2, $1, $3); }
-| expr NE expr { $$ = Build(InequalityFn, 2, $1, $3); }
-| expr AND expr { $$ = Build(LogicalAndFn, 2, $1, $3); }
-| expr OR expr { $$ = Build(LogicalOrFn, 2, $1, $3); }
-| '!' expr { $$ = Build(LogicalNotFn, 1, $2); }
-| IF expr THEN expr ENDIF { $$ = Build(IfElseFn, 2, $2, $4); }
-| IF expr THEN expr ELSE expr ENDIF { $$ = Build(IfElseFn, 3, $2, $4, $6); }
+| '(' expr ')' { $$ = $2; $$->start=@$.start; $$->end=@$.end; }
+| expr ';' { $$ = $1; $$->start=@1.start; $$->end=@1.end; }
+| expr ';' expr { $$ = Build(SequenceFn, @$, 2, $1, $3); }
+| error ';' expr { $$ = $3; $$->start=@$.start; $$->end=@$.end; }
+| expr '+' expr { $$ = Build(ConcatFn, @$, 2, $1, $3); }
+| expr EQ expr { $$ = Build(EqualityFn, @$, 2, $1, $3); }
+| expr NE expr { $$ = Build(InequalityFn, @$, 2, $1, $3); }
+| expr AND expr { $$ = Build(LogicalAndFn, @$, 2, $1, $3); }
+| expr OR expr { $$ = Build(LogicalOrFn, @$, 2, $1, $3); }
+| '!' expr { $$ = Build(LogicalNotFn, @$, 1, $2); }
+| IF expr THEN expr ENDIF { $$ = Build(IfElseFn, @$, 2, $2, $4); }
+| IF expr THEN expr ELSE expr ENDIF { $$ = Build(IfElseFn, @$, 3, $2, $4, $6); }
| STRING '(' arglist ')' {
$$ = malloc(sizeof(Expr));
$$->fn = FindFunction($1);
@@ -93,6 +98,8 @@ expr: STRING {
$$->name = $1;
$$->argc = $3.argc;
$$->argv = $3.argv;
+ $$->start = @$.start;
+ $$->end = @$.end;
}
;
diff --git a/edify/yydefs.h b/edify/yydefs.h
new file mode 100644
index 000000000..625786255
--- /dev/null
+++ b/edify/yydefs.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _YYDEFS_H_
+#define _YYDEFS_H_
+
+#define YYLTYPE YYLTYPE
+typedef struct {
+ int start, end;
+} YYLTYPE;
+
+#define YYLLOC_DEFAULT(Current, Rhs, N) \
+ do { \
+ if (N) { \
+ (Current).start = YYRHSLOC(Rhs, 1).start; \
+ (Current).end = YYRHSLOC(Rhs, N).end; \
+ } else { \
+ (Current).start = YYRHSLOC(Rhs, 0).start; \
+ (Current).end = YYRHSLOC(Rhs, 0).end; \
+ } \
+ } while (0)
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 02:55:58 +0100