diff options
Diffstat (limited to 'AppPkg/Applications/Python/Python-2.7.10/Parser/grammar.c')
| -rw-r--r-- | AppPkg/Applications/Python/Python-2.7.10/Parser/grammar.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Python-2.7.10/Parser/grammar.c b/AppPkg/Applications/Python/Python-2.7.10/Parser/grammar.c new file mode 100644 index 0000000000..4cce422d1a --- /dev/null +++ b/AppPkg/Applications/Python/Python-2.7.10/Parser/grammar.c @@ -0,0 +1,254 @@ +
+/* Grammar implementation */
+
+#include "Python.h"
+#include "pgenheaders.h"
+
+#include <ctype.h>
+
+#include "token.h"
+#include "grammar.h"
+
+#ifdef RISCOS
+#include <unixlib.h>
+#endif
+
+extern int Py_DebugFlag;
+
+grammar *
+newgrammar(int start)
+{
+ grammar *g;
+
+ g = (grammar *)PyObject_MALLOC(sizeof(grammar));
+ if (g == NULL)
+ Py_FatalError("no mem for new grammar");
+ g->g_ndfas = 0;
+ g->g_dfa = NULL;
+ g->g_start = start;
+ g->g_ll.ll_nlabels = 0;
+ g->g_ll.ll_label = NULL;
+ g->g_accel = 0;
+ return g;
+}
+
+dfa *
+adddfa(grammar *g, int type, char *name)
+{
+ dfa *d;
+
+ g->g_dfa = (dfa *)PyObject_REALLOC(g->g_dfa,
+ sizeof(dfa) * (g->g_ndfas + 1));
+ if (g->g_dfa == NULL)
+ Py_FatalError("no mem to resize dfa in adddfa");
+ d = &g->g_dfa[g->g_ndfas++];
+ d->d_type = type;
+ d->d_name = strdup(name);
+ d->d_nstates = 0;
+ d->d_state = NULL;
+ d->d_initial = -1;
+ d->d_first = NULL;
+ return d; /* Only use while fresh! */
+}
+
+int
+addstate(dfa *d)
+{
+ state *s;
+
+ d->d_state = (state *)PyObject_REALLOC(d->d_state,
+ sizeof(state) * (d->d_nstates + 1));
+ if (d->d_state == NULL)
+ Py_FatalError("no mem to resize state in addstate");
+ s = &d->d_state[d->d_nstates++];
+ s->s_narcs = 0;
+ s->s_arc = NULL;
+ s->s_lower = 0;
+ s->s_upper = 0;
+ s->s_accel = NULL;
+ s->s_accept = 0;
+ return s - d->d_state;
+}
+
+void
+addarc(dfa *d, int from, int to, int lbl)
+{
+ state *s;
+ arc *a;
+
+ assert(0 <= from && from < d->d_nstates);
+ assert(0 <= to && to < d->d_nstates);
+
+ s = &d->d_state[from];
+ s->s_arc = (arc *)PyObject_REALLOC(s->s_arc, sizeof(arc) * (s->s_narcs + 1));
+ if (s->s_arc == NULL)
+ Py_FatalError("no mem to resize arc list in addarc");
+ a = &s->s_arc[s->s_narcs++];
+ a->a_lbl = lbl;
+ a->a_arrow = to;
+}
+
+int
+addlabel(labellist *ll, int type, char *str)
+{
+ int i;
+ label *lb;
+
+ for (i = 0; i < ll->ll_nlabels; i++) {
+ if (ll->ll_label[i].lb_type == type &&
+ strcmp(ll->ll_label[i].lb_str, str) == 0)
+ return i;
+ }
+ ll->ll_label = (label *)PyObject_REALLOC(ll->ll_label,
+ sizeof(label) * (ll->ll_nlabels + 1));
+ if (ll->ll_label == NULL)
+ Py_FatalError("no mem to resize labellist in addlabel");
+ lb = &ll->ll_label[ll->ll_nlabels++];
+ lb->lb_type = type;
+ lb->lb_str = strdup(str);
+ if (Py_DebugFlag)
+ printf("Label @ %8p, %d: %s\n", ll, ll->ll_nlabels,
+ PyGrammar_LabelRepr(lb));
+ return lb - ll->ll_label;
+}
+
+/* Same, but rather dies than adds */
+
+int
+findlabel(labellist *ll, int type, char *str)
+{
+ int i;
+
+ for (i = 0; i < ll->ll_nlabels; i++) {
+ if (ll->ll_label[i].lb_type == type /*&&
+ strcmp(ll->ll_label[i].lb_str, str) == 0*/)
+ return i;
+ }
+ fprintf(stderr, "Label %d/'%s' not found\n", type, str);
+ Py_FatalError("grammar.c:findlabel()");
+ return 0; /* Make gcc -Wall happy */
+}
+
+/* Forward */
+static void translabel(grammar *, label *);
+
+void
+translatelabels(grammar *g)
+{
+ int i;
+
+#ifdef Py_DEBUG
+ printf("Translating labels ...\n");
+#endif
+ /* Don't translate EMPTY */
+ for (i = EMPTY+1; i < g->g_ll.ll_nlabels; i++)
+ translabel(g, &g->g_ll.ll_label[i]);
+}
+
+static void
+translabel(grammar *g, label *lb)
+{
+ int i;
+
+ if (Py_DebugFlag)
+ printf("Translating label %s ...\n", PyGrammar_LabelRepr(lb));
+
+ if (lb->lb_type == NAME) {
+ for (i = 0; i < g->g_ndfas; i++) {
+ if (strcmp(lb->lb_str, g->g_dfa[i].d_name) == 0) {
+ if (Py_DebugFlag)
+ printf(
+ "Label %s is non-terminal %d.\n",
+ lb->lb_str,
+ g->g_dfa[i].d_type);
+ lb->lb_type = g->g_dfa[i].d_type;
+ free(lb->lb_str);
+ lb->lb_str = NULL;
+ return;
+ }
+ }
+ for (i = 0; i < (int)N_TOKENS; i++) {
+ if (strcmp(lb->lb_str, _PyParser_TokenNames[i]) == 0) {
+ if (Py_DebugFlag)
+ printf("Label %s is terminal %d.\n",
+ lb->lb_str, i);
+ lb->lb_type = i;
+ free(lb->lb_str);
+ lb->lb_str = NULL;
+ return;
+ }
+ }
+ printf("Can't translate NAME label '%s'\n", lb->lb_str);
+ return;
+ }
+
+ if (lb->lb_type == STRING) {
+ if (isalpha(Py_CHARMASK(lb->lb_str[1])) ||
+ lb->lb_str[1] == '_') {
+ char *p;
+ char *src;
+ char *dest;
+ size_t name_len;
+ if (Py_DebugFlag)
+ printf("Label %s is a keyword\n", lb->lb_str);
+ lb->lb_type = NAME;
+ src = lb->lb_str + 1;
+ p = strchr(src, '\'');
+ if (p)
+ name_len = p - src;
+ else
+ name_len = strlen(src);
+ dest = (char *)malloc(name_len + 1);
+ if (!dest) {
+ printf("Can't alloc dest '%s'\n", src);
+ return;
+ }
+ strncpy(dest, src, name_len);
+ dest[name_len] = '\0';
+ free(lb->lb_str);
+ lb->lb_str = dest;
+ }
+ else if (lb->lb_str[2] == lb->lb_str[0]) {
+ int type = (int) PyToken_OneChar(lb->lb_str[1]);
+ if (type != OP) {
+ lb->lb_type = type;
+ free(lb->lb_str);
+ lb->lb_str = NULL;
+ }
+ else
+ printf("Unknown OP label %s\n",
+ lb->lb_str);
+ }
+ else if (lb->lb_str[2] && lb->lb_str[3] == lb->lb_str[0]) {
+ int type = (int) PyToken_TwoChars(lb->lb_str[1],
+ lb->lb_str[2]);
+ if (type != OP) {
+ lb->lb_type = type;
+ free(lb->lb_str);
+ lb->lb_str = NULL;
+ }
+ else
+ printf("Unknown OP label %s\n",
+ lb->lb_str);
+ }
+ else if (lb->lb_str[2] && lb->lb_str[3] && lb->lb_str[4] == lb->lb_str[0]) {
+ int type = (int) PyToken_ThreeChars(lb->lb_str[1],
+ lb->lb_str[2],
+ lb->lb_str[3]);
+ if (type != OP) {
+ lb->lb_type = type;
+ free(lb->lb_str);
+ lb->lb_str = NULL;
+ }
+ else
+ printf("Unknown OP label %s\n",
+ lb->lb_str);
+ }
+ else
+ printf("Can't translate STRING label %s\n",
+ lb->lb_str);
+ }
+ else
+ printf("Can't translate label '%s'\n",
+ PyGrammar_LabelRepr(lb));
+}
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