start

1 files changed, 234 insertions, 0 deletions

diff --git a/interface.c b/interface.c
new file mode 100644
index 0000000..419e624
--- /dev/null
+++ b/interface.c
@@ -0,0 +1,234 @@
+/*
+ *
+ * Interpreteur de ligne de commande
+ *
+ */
+
+#include <stdio.h>
+#include <limits.h>
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#else
+#define _(x) x
+#endif
+#include "interface.h"
+#include "exceptions.h"
+#include "pile.h"
+
+
+
+typedef unsigned char op_t;
+
+typedef struct operator_t {
+	op_t op;
+	int pri, func;
+} operator_t;
+
+op_t pile_operators[PILEOP_MAX];
+int pile_nestedcall[PILECALL_MAX];
+
+int pileop_pos = 0, pilecall_pos = 0;
+
+operator_t operators[] = {
+	{',', 0, OP_NEST},
+	{'+', 2, OP_PLUS},
+	{'-', 2, OP_MOINS},
+	{'*', 3, OP_MUL},
+	{'/', 3, OP_DIV},
+	{'%', 3, OP_MOD},
+	{'^', 4, OP_EXP},
+	{'+' + 128, 5, OP_PLUS_UNARY},
+	{'-' + 128, 5, OP_MOINS_UNARY},
+	{'=', 1, OP_ASSIGN},
+	{'(', 6, OP_FUNC_CALL},
+	{'(' + 128, 6, OP_LPAREN},
+	{255, -1, -1}
+};
+
+operator_t get_op(op_t op)
+{
+	int i;
+
+	for (i = 0; operators[i].op != 255; i++) {
+		if (operators[i].op == op)
+			return operators[i];
+	}
+
+	return operators[i];
+}
+
+int get_pri(op_t op)
+{
+	return get_op(op).pri;
+}
+
+int get_func(op_t op)
+{
+	return get_op(op).func;
+}
+
+op_t get_last_op(void)
+{
+	if (pileop_pos)
+		return pile_operators[pileop_pos - 1];
+	else
+		return -1;
+}
+
+op_t pop_op(void)
+{
+	if (pileop_pos)
+		return pile_operators[--pileop_pos];
+	return -1;
+}
+
+void push_op(op_t op)
+{
+	if (pileop_pos != PILEOP_MAX)
+		pile_operators[pileop_pos++] = op;
+	else
+		exception(-1, _("Too many nested operators in expression.\n"));
+
+}
+
+int pop_call(void)
+{
+	if (pilecall_pos)
+		fprintf(stderr, "Dépilement du dernier appel de fonction: %i\n",
+			pile_nestedcall[pilecall_pos - 1]);
+	return pile_nestedcall[--pilecall_pos];
+	return -1;
+}
+
+void increment_call(void)
+{
+	if (pilecall_pos) {
+		fprintf(stderr, "Incrément du dernier appel de fonction: %i\n",
+			pile_nestedcall[pilecall_pos - 1]);
+		if (pile_nestedcall[pilecall_pos - 1] != -1)
+			pile_nestedcall[pilecall_pos - 1]++;
+	}
+}
+
+int get_last_call(void)
+{
+	if (pilecall_pos)
+		return pile_nestedcall[pilecall_pos - 1];
+	return -1;
+}
+
+void push_call(int call)
+{
+	fprintf(stderr, "Empilement d'un appel de fonction: %i\n", call);
+	if (pilecall_pos != PILECALL_MAX)
+		pile_nestedcall[pilecall_pos++] = call;
+	else
+		exception(-1, _("Too many nested functions calls in expression.\n"));
+}
+
+char *getword(char *line, char *p)
+{
+	char o;
+
+	do {
+		if (*(line) != ' ') {
+			o = *(p++) = *line;
+			fprintf(stderr, "getword(): a trouvé le caractère '%c'\n", o);
+		}
+		line++;
+	} while ((*line) && (*line != ')') && (*line != ';') && (get_func(*line) == -1)
+		 && (get_func(o) == -1));
+	*p = '\0';
+	return line;
+}
+
+int parse_line(char *line)
+{
+	char buffer[BUFSIZ];
+	op_t op;
+	int got_unary = 128, nbrargs;
+
+	fprintf(stderr, "Analyse de: \"%s\"...\n\n", line);
+	while (*line) {
+		line = getword(line, buffer);
+		fprintf(stderr, "parse_line(): getword a trouvé le mot \"%s\"\n", buffer);
+		if (get_func(buffer[0]) != -1) {
+			fprintf(stderr, "Il s'agit d'un opérateur.\n");
+			buffer[0] += got_unary;
+			if (got_unary) {
+				fprintf(stderr, "Opérateur de type unaire\n");
+			}
+			if (get_pri(buffer[0]) == -1) {
+				if (got_unary) {
+					exception(-1, _("Invalid unary operator"));
+				} else {
+					exception(-1, _("Invalid binary operator"));
+				}
+			}
+			fprintf(stderr, "Priorité du dernier op: %i, priorité actu: %i\n",
+				get_pri(get_last_op()), get_pri(buffer[0]));
+			while (get_pri(get_last_op()) >= get_pri(buffer[0])
+			       && ((get_last_op() & 127) != '(')) {
+				fprintf(stderr,
+					"Il y a un opérateur plus important sur la file.\n");
+				act_pile(get_func(pop_op()));
+				got_unary = 0;
+				fprintf(stderr, "Priorité du dernier op: %i, priorité actu: %i\n",
+					get_pri(get_last_op()), get_pri(buffer[0]));
+			}
+			fprintf(stderr, "Mise sur la file\n");
+			if (buffer[0] == '(') {
+				push_call(0);
+			}
+			if (buffer[0] == ',') {
+				increment_call();
+			} else
+				push_op(buffer[0]);
+			got_unary = 128;
+		} else if ((buffer[0] == ';') || (buffer[0] == ')')) {
+			fprintf(stderr, "Caractère spécial\n");
+			switch (buffer[0]) {
+			case ';':
+				fprintf(stderr, "Vidage complet de la file (fin de commande).\n");
+				while (pileop_pos) {
+					op = pop_op();
+					if (op == '(')
+						exception(-1,
+							  _
+							  ("Parse error: too much left parenthesis"));
+					act_pile(get_func(op));
+				}
+				break;
+			case ')':
+				fprintf(stderr, "Vidage de la file jusqu'à '(' car ')' trouvée.\n");
+				while (1) {
+					if (!pileop_pos)
+						exception(-1,
+							  _
+							  ("Parse error: too much right parenthesis"));
+					op = pop_op();
+					if (((op & 127) == '('))
+						break;
+					act_pile(get_func(op));
+				}
+				if (op == '(') {
+					nbrargs = pop_call();
+					push_pile_int(nbrargs);
+					act_pile(get_func(op));
+				}
+				got_unary = 0;
+				break;
+			}
+		} else if (((buffer[0] >= 'A') && (buffer[0] <= 'Z'))
+			   || ((buffer[0] >= 'a') && (buffer[0] <= 'z'))
+			   || ((buffer[0] >= '0') && (buffer[0] <= '9')) || (buffer[0] == '_')) {
+			fprintf(stderr, "Symbole.\n");
+			push_pile(buffer);
+			got_unary = 0;
+			if (!get_last_call())
+				increment_call();
+		} else if (buffer[0]) {
+			exception(-1, _("Invalid character"));
+		}
+	}
+}