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-rw-r--r--src/mds-kbdc/compile-layout.c207
-rw-r--r--src/mds-kbdc/raw-data.c2
-rw-r--r--src/mds-kbdc/raw-data.h2
3 files changed, 186 insertions, 25 deletions
diff --git a/src/mds-kbdc/compile-layout.c b/src/mds-kbdc/compile-layout.c
index 800a46b..0b608db 100644
--- a/src/mds-kbdc/compile-layout.c
+++ b/src/mds-kbdc/compile-layout.c
@@ -110,6 +110,32 @@ static char32_t** current_return_value = NULL;
*/
static int compile_subtree(mds_kbdc_tree_t* restrict tree);
+/**
+ * Check that a function used in a part of a literal is defined
+ *
+ * @param tree The statement where the literal is located
+ * @param raw The beginning of the function call in the literal
+ * @param lineoff The offset on the line where the function call in the literal beings
+ * @param end Output parameter for the end of the function call
+ * @param rc Success status output parameter: zero on success,
+ * -1 on error, 1 if an undefined function is used
+ */
+static void check_function_call(const mds_kbdc_tree_t* restrict tree, const char* restrict raw,
+ size_t lineoff, const char* restrict* restrict end, int* restrict rc);
+
+/**
+ * Parse an argument in a function call
+ *
+ * @param tree The statement where the function call appear
+ * @param raw The beginning of the argument for the function call
+ * @param lineoff The offset for `raw` on line in which it appears
+ * @param end Output parameter for the end of the argument
+ * @param value Output parameter for the value to which the argument evaulates
+ * @return Zero on success, -1 on error
+ */
+static int parse_function_argument(mds_kbdc_tree_t* restrict tree, const char* restrict raw, size_t lineoff,
+ const char* restrict* restrict end, char32_t** restrict value);
+
/*** Macro-, function- and variable-support, string-parsing and value- and mapping-compilation. ***/
@@ -335,7 +361,7 @@ static int call_function(mds_kbdc_tree_t* restrict tree, const char* restrict na
/* Call the function. */
*return_value = builtin_function_invoke(name, arg_count, arguments);
fail_if (*return_value == NULL);
-
+
done:
/* Pop return-stack. */
@@ -365,30 +391,95 @@ static int call_function(mds_kbdc_tree_t* restrict tree, const char* restrict na
static char32_t* parse_function_call(mds_kbdc_tree_t* restrict tree, const char* restrict raw, size_t lineoff,
int* restrict escape, const char* restrict* restrict end)
{
- (void) tree;
- (void) raw;
- (void) lineoff;
- (void) escape;
- (void) end;
- return NULL; /* TODO */
+#define R(LOWER, UPPER) (((LOWER) <= c) && (c <= (UPPER)))
+#define GROW_ARGS \
+ if (arguments_ptr == arguments_size) \
+ fail_if (xxrealloc(old_arguments, arguments, arguments_size += 4, char32_t*))
+
+ const char* restrict bracket = raw + 1;
+ char32_t* rc = NULL;
+ const char32_t** restrict arguments_;
+ char32_t** restrict arguments = NULL;
+ char32_t** restrict old_arguments = NULL;
+ size_t arguments_ptr = 0, arguments_size = 0;
+ char* restrict name;
+ char c;
+ int r, saved_errno;
+
+ /* Find the opening bracket associated with the function call and validate the escape. */
+ while ((c = *bracket++))
+ if ((c == '_') || R('0', '9') || R('a', 'z') || R('A', 'Z'));
+ else if (c == '(')
+ break;
+ else
+ {
+ *end = --bracket;
+ NEW_ERROR(tree, ERROR, "invalid escape");
+ goto error;
+ }
+
+ /* Copy the name of the function. */
+ name = alloca((size_t)(bracket - raw) * sizeof(char));
+ memcpy(name, raw + 1, (size_t)(bracket - raw - 1) * sizeof(char));
+ name[bracket - raw - 1] = 0;
+
+ /* Get arguments. */
+ for (*end = ++bracket;;)
+ {
+ while (**end == ' ')
+ (*end)++;
+ GROW_ARGS;
+ arguments[arguments_ptr] = NULL;
+ if (**end == ')')
+ {
+ arguments_ptr++;
+ break;
+ }
+ r = parse_function_argument(tree, *end, lineoff + (size_t)(*end - raw), end, arguments + arguments_ptr++);
+ fail_if (r < 0);
+ }
+
+ /* Call the function. */
+ if (tree->processed == PROCESS_LEVEL)
+ goto stop;
+ arguments_ = alloca(arguments_ptr * sizeof(const char32_t*));
+ memcpy(arguments_, arguments, arguments_ptr * sizeof(const char32_t*));
+ fail_if (call_function(tree, name, arguments_, lineoff, lineoff + (size_t)(*end - raw), &rc));
+ if (rc == NULL)
+ goto stop;
+
+ while (arguments_ptr--)
+ free(arguments[arguments_ptr]);
+ free(arguments);
+ *escape = (**end == ')') ? 0 : 1;
+ if (*escape == 0)
+ (*end)++;
+ return rc;
+
+ error:
+ error->start = lineoff;
+ error->end = lineoff + (size_t)(*end - raw);
+ stop:
+ *escape = 0;
+ tree->processed = PROCESS_LEVEL;
+ fail_if (xmalloc(rc, 1, char32_t));
+ return *rc = -1, rc;
+
+ pfail:
+ saved_errno = errno;
+ free(rc);
+ if (old_arguments)
+ arguments = old_arguments;
+ while (arguments_ptr--)
+ free(arguments[arguments_ptr]);
+ free(arguments);
+ return errno = saved_errno, NULL;
+#undef GROW_ARGS
+#undef R
}
/**
- * Check that a function used in a part of a literal is defined
- *
- * @param tree The statement where the literal is located
- * @param raw The beginning of the function call in the literal
- * @param lineoff The offset on the line where the function call in the literal beings
- * @param end Output parameter for the end of the function call
- * @param rc Success status output parameter: zero on success,
- * -1 on error, 1 if an undefined function is used
- */
-static void check_function_call(const mds_kbdc_tree_t* restrict tree, const char* restrict raw,
- size_t lineoff, const char* restrict* restrict end, int* restrict rc);
-
-
-/**
* Check that all functions used in a part of a literal are defined
*
* @param tree The statement where the literal is located
@@ -452,8 +543,8 @@ static void check_function_call(const mds_kbdc_tree_t* restrict tree, const char
{
mds_kbdc_tree_t* function = NULL;
mds_kbdc_include_stack_t* _function_include_stack;
- char* bracket = strchr(raw, '(');
- char* name = NULL;
+ char* restrict bracket = strchr(raw, '(');
+ char* restrict name;
size_t arg_count;
/* Check that it is a function call by check that it has an opening bracket. */
@@ -972,6 +1063,76 @@ static size_t parse_variable(mds_kbdc_tree_t* restrict tree, const char* restric
/**
+ * Parse an argument in a function call
+ *
+ * @param tree The statement where the function call appear
+ * @param raw The beginning of the argument for the function call
+ * @param lineoff The offset for `raw` on line in which it appears
+ * @param end Output parameter for the end of the argument
+ * @param value Output parameter for the value to which the argument evaulates
+ * @return Zero on success, -1 on error
+ */
+static int parse_function_argument(mds_kbdc_tree_t* restrict tree, const char* restrict raw, size_t lineoff,
+ const char* restrict* restrict end, char32_t** restrict value)
+{
+ size_t size = strlen(raw), ptr = 0, call_end = 0;
+ int escape = 0, quote = 0;
+ char* raw_argument = NULL;
+ int saved_errno;
+
+ /* Find the span of the argument. */
+ while (ptr < size)
+ {
+ char c = raw[ptr++];
+
+ /* Escapes may be longer than one character,
+ but only the first can affect the parsing. */
+ if (escape) escape = 0;
+ /* Nested function and nested quotes can appear. */
+ else if (ptr <= call_end) ;
+ /* Quotes end with the same symbols as they start with,
+ and quotes automatically escape brackets. */
+ /* \ can either start a functon call or an escape. */
+ else if (c == '\\')
+ {
+ /* It may not be an escape, but registering it
+ as an escape cannot harm us since we only
+ skip the first character, and a function call
+ cannot be that short. */
+ escape = 1;
+ /* Nested quotes can appear at function calls. */
+ call_end = get_end_of_call(raw, ptr, size);
+ }
+ /* " is the quote symbol. */
+ else if (quote) quote = (c != '"');
+ else if (c == '"') quote = 1;
+ /* End of argument? */
+ else if (strchr(" )", c))
+ {
+ ptr--;
+ break;
+ }
+ }
+ *end = raw + ptr;
+
+ /* Copy the argument so that we have a NUL-terminates string. */
+ fail_if (xmalloc(raw_argument, ptr + 1, char));
+ memcpy(raw_argument, raw, ptr * sizeof(char));
+ raw_argument[ptr] = '\0';
+
+ /* Evaluate argument. */
+ *value = parse_string(tree, raw_argument, lineoff);
+ fail_if (*value == NULL);
+
+ free(raw_argument);
+ return 0;
+ FAIL_BEGIN;
+ free(raw_argument);
+ FAIL_END;
+}
+
+
+/**
* Store a macro
*
* @param macro The macro
diff --git a/src/mds-kbdc/raw-data.c b/src/mds-kbdc/raw-data.c
index 7869bc0..4a6a6ba 100644
--- a/src/mds-kbdc/raw-data.c
+++ b/src/mds-kbdc/raw-data.c
@@ -167,7 +167,7 @@ static char* read_file(const char* restrict pathname, size_t* restrict size)
* or `size` if the call do not end (that is, the code ends
* prematurely), or zero if there is no function call at `offset`
*/
-size_t get_end_of_call(char* restrict content, size_t offset, size_t size)
+size_t get_end_of_call(const char* restrict content, size_t offset, size_t size)
{
#define C content[ptr]
#define r(lower, upper) (((lower) <= C) && (C <= (upper)))
diff --git a/src/mds-kbdc/raw-data.h b/src/mds-kbdc/raw-data.h
index 95163db..a638f8a 100644
--- a/src/mds-kbdc/raw-data.h
+++ b/src/mds-kbdc/raw-data.h
@@ -106,7 +106,7 @@ mds_kbdc_source_code_t* mds_kbdc_source_code_dup(mds_kbdc_source_code_t* restric
* or `size` if the call do not end (that is, the code ends
* prematurely), or zero if there is no function call at `offset`
*/
-size_t get_end_of_call(char* restrict content, size_t offset, size_t size) __attribute__((pure));
+size_t get_end_of_call(const char* restrict content, size_t offset, size_t size) __attribute__((pure));
/**
* Read lines of a source file
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-10 10:00:12 +0000