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authorPixel <Pixel>2001-04-28 21:40:25 +0000
committerPixel <Pixel>2001-04-28 21:40:25 +0000
commit3b37a00a4be251f87e543d269489cb7a989425d5 (patch)
tree51aedcb4d1627743d6e240266c58a67cf6ae0d67 /parser.c
parentab778d7f896b16f3e6f2b068c2b34d219723002b (diff)
Hop, gros bordel, plein de fichiers ajoutes et supprimes :)
Diffstat (limited to 'parser.c')
-rw-r--r--parser.c295
1 files changed, 0 insertions, 295 deletions
diff --git a/parser.c b/parser.c
deleted file mode 100644
index 3f0c6ce..0000000
--- a/parser.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/*
- *
- * Interpreteur de ligne de commande
- *
- */
-#include <stdio.h>
-#include <limits.h>
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#else
-#define _(x) x
-#endif
-#include "exceptions.h"
-#include "parser.h"
-#include "pile.h"
-
-
-typedef unsigned char op_t;
-
-typedef struct operator_t {
- op_t op;
- int pri, func;
-} operator_t;
-
-static op_t pile_operators[PILEOP_MAX];
-static int pile_nestedcall[PILECALL_MAX];
-
-static int pileop_pos = 0, pilecall_pos = 0;
-
-/* La liste des opérateurs reconnus par le parser */
-
-static 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}
-};
-
-
-
-
-/* Fonction interne: convertit un operateur en sa structure */
-
-static 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];
-}
-
-/* Fonctions internes de lectures sur la structure */
-
-static int get_pri(op_t op)
-{
- return get_op(op).pri;
-}
-
-static int get_func(op_t op)
-{
- return get_op(op).func;
-}
-
-/* Focntions internes d'empilement / dépilement */
-
-static op_t get_last_op(void)
-{
- if (pileop_pos)
- return pile_operators[pileop_pos - 1];
- else
- return -1;
-}
-
-static op_t pop_op(void)
-{
- if (pileop_pos)
- return pile_operators[--pileop_pos];
- return -1;
-}
-
-static 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"));
-
-}
-
-static int pop_call(void)
-{
- if (pilecall_pos)
- return pile_nestedcall[--pilecall_pos];
- return -1;
-}
-
-static void increment_call(void)
-{
- if (pilecall_pos) {
- if (pile_nestedcall[pilecall_pos - 1] != -1)
- pile_nestedcall[pilecall_pos - 1]++;
- }
-}
-
-static int get_last_call(void)
-{
- if (pilecall_pos)
- return pile_nestedcall[pilecall_pos - 1];
- return -1;
-}
-
-static void push_call(int call)
-{
- if (pilecall_pos != PILECALL_MAX)
- pile_nestedcall[pilecall_pos++] = call;
- else
- exception(-1, _("Too many nested functions calls in expression.\n"));
-}
-
-/* Cette fonction lit un "mot" sur la chaine line et renvoit le nouveau pointeur */
-
-static char *getword(char *line, char *p)
-{
- char o = 0, *d = line, instring = 0, gotbslash = 0;
-
- do {
- if (instring) {
- o = *(p++) = *line;
- if (!gotbslash) {
- switch (instring) {
- case 1:
- if (*line == '\'') {
- instring = 0;
- }
- break;
- case 2:
- if (*line == '"') {
- instring = 0;
- }
- break;
- }
- if (*line == '\\')
- gotbslash = 1;
- } else {
- gotbslash = 0;
- }
- } else {
- if (*(line) == '\'') {
- o = *(p++) = *line;
- instring = 1;
- } else if (*(line) == '"') {
- o = *(p++) = *line;
- instring = 2;
- } else {
- if (*(line) != ' ' && *(line) != '\t') {
- o = *(p++) = *line;
- } else if (d != line) {
- *p = '\0';
- return line;
- }
- }
- }
- line++;
- }
- while (((*line) && (*line != ')') && (*line != ']')
- && (*line != ';') && (get_func(*line) == -1)
- && (get_func(o) == -1)) || (instring));
- *p = '\0';
- return line;
-}
-
-/* Cette fonction va parcourir une chaine afin d'appeler les fonction push_pile() et act_pile() */
-
-void parse_line(char *line)
-{
- char buffer[BUFSIZ], imm[BUFSIZ], *d = line;
- op_t op;
- int got_unary = 128, nbrargs;
-
- sprintf(buffer, "Read line '%s'", line);
- pushcontext(buffer);
-
- while (*line) {
- line = getword(line, buffer);
- sprintf(imm, "Analysing word '%s' at position %i", buffer, line - d);
- pushcontext(imm);
- if (get_func(buffer[0]) != -1) {
- /* Le mot lut est un operateur, on agit sur la pile */
- buffer[0] += got_unary;
- if (got_unary) {
- }
- if (get_pri(buffer[0]) == -1) {
- if (got_unary) {
- exception(-1, _("Invalid unary operator"));
- } else {
- exception(-1, _("Invalid binary operator"));
- }
- }
- while (get_pri(get_last_op()) >= get_pri(buffer[0])
- && (((get_last_op() & 127) != '(')
- && ((get_last_op() & 127) != '['))) {
- act_pile(get_func(pop_op()));
- got_unary = 0;
- }
- 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] == ')')
- || (buffer[0] == ']')) {
- /* Le mot lut est un opérateur spécial, on vide la pile */
- switch (buffer[0]) {
- case ';':
- /* Equivalent a fin de ligne */
- while (pileop_pos) {
- op = pop_op();
- if (op == '(')
- exception(-1, _("Parse error: too much left parenthesis"));
- act_pile(get_func(op));
- }
- popcontext();
- popcontext();
- return;
- case ')':
- /* Fin de parenthese (Appel de fonction ou expression mathématique) */
- while (1) {
- if (!pileop_pos)
- exception(-1, _("Parse error: too much right parenthesis"));
- op = pop_op();
- if (((op & 127) == '('))
- break;
- if (((op & 127) == '['))
- exception(-1, _("Parse error: enclosure mismatch"));
- act_pile(get_func(op));
- }
- if (op == '(') {
- nbrargs = pop_call();
- push_pile_int(nbrargs);
- act_pile(get_func(op));
- }
- got_unary = 0;
- break;
- case ']':
- /* Fin d'opérateur de décalage */
- while (1) {
- if (!pileop_pos)
- exception(-1, _("Parse error: too much right parenthesis"));
- op = pop_op();
- if (((op & 127) == '['))
- break;
- if (((op & 127) == '('))
- exception(-1, _("Parse error: enclosure mismatch"));
- act_pile(get_func(op));
- }
- 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] == '_') || (buffer[0] == '"')
- || (buffer[0] == '\'') || (buffer[0] == '.')
- || (buffer[0] == '#') || (buffer[0] == '?')) {
- /* Dans tous les autres cas, on a reçu un symbole, on le pose sur la pile */
- push_pile(buffer);
- got_unary = 0;
- if (!get_last_call())
- increment_call();
- } else if (buffer[0]) {
- exception(-1, _("Invalid character"));
- }
- popcontext();
- }
-
- popcontext();
-}
-