rewritten template parser for awx - uses @for, @if, @else, @end for basic flow control
SVN-Revision: 7276
This commit is contained in:
Felix Fietkau
parent
84b235140c
commit
dd054a555a
@ -1,6 +1,6 @@
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diff -purN bb.old/editors/awk.c bb.dev/editors/awk.c
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--- bb.old/editors/awk.c 2007-03-06 19:38:07.278092000 +0100
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+++ bb.dev/editors/awk.c 2007-03-11 05:14:11.776304544 +0100
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--- bb.old/editors/awk.c 2007-05-20 04:17:05.002197784 +0200
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+++ bb.dev/editors/awk.c 2007-05-20 07:03:57.436076472 +0200
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@@ -30,6 +30,11 @@
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/* these flags are static, don't change them when value is changed */
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#define VF_DONTTOUCH (VF_ARRAY | VF_SPECIAL | VF_WALK | VF_CHILD | VF_DIRTY)
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@ -97,8 +97,8 @@ diff -purN bb.old/editors/awk.c bb.dev/editors/awk.c
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switch (c) {
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diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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--- bb.old/editors/awx.c 1970-01-01 01:00:00.000000000 +0100
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+++ bb.dev/editors/awx.c 2007-03-14 02:03:50.566202928 +0100
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@@ -0,0 +1,590 @@
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+++ bb.dev/editors/awx.c 2007-05-20 08:07:26.759971216 +0200
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@@ -0,0 +1,625 @@
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+/*
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+ * awk web extension
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+ *
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@ -109,14 +109,13 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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+
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+#include <cgi.h>
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+#include <glob.h>
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+#include "awx_parser.h"
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+
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+#define LINE_BUF 2048
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+#define HASH_MAX 1536
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+#define TR_START "@TR<<"
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+#define TR_END ">>"
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+#define MAX_TR 32
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+#define SSI_START "<%"
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+#define SSI_END "%>"
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+
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+#undef fputs
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+
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@ -152,9 +151,17 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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+{
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+ char *tok[MAX_TR * 3];
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+ char *l, *p, *p2, *res;
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+ int len = 0, _pos = 0, i;
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+ int len = 0, _pos = 0, i, tr_abort = 0;
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+ static char *backlog = NULL;
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+
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+ if (backlog) {
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+ backlog = xrealloc(backlog, strlen(backlog) + strlen(line) + 1);
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+ sprintf(backlog + strlen(backlog), line);
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+ l = backlog;
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+ } else {
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+ l = line;
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+ }
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+
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+ l = line;
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+ while (l != NULL) {
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+ if ((p = strstr(l, TR_START)) == NULL) {
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+ len += strlen((tok[_pos++] = l));
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@ -162,8 +169,14 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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+ }
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+
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+ p2 = strstr(p, TR_END);
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+ if (p2 == NULL)
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+ if (p2 == NULL) {
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+ p2 = backlog;
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+ backlog = xstrdup(l);
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+ if (p2)
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+ free(p2);
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+ tr_abort = 1;
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+ break;
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+ }
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+
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+ *p = 0;
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+ *p2 = 0;
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@ -182,7 +195,11 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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+ strcat(p, tok[i]);
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+ p += strlen(tok[i]);
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+ }
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+
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+ if (!tr_abort && backlog) {
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+ free(backlog);
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+ backlog = NULL;
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+ }
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+
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+ return res;
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+}
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+
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@ -398,22 +415,25 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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+ return res;
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+}
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+
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+
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+/* parse and evaluate an awk expression and return the result as string */
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+static char *render_lookup(char *fname, int lnr, char *str)
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+/* parse an awk expression */
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+static var *parse_awk(char *str)
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+{
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+ chain body;
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+ var tv;
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+ node *n;
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+ var *tv = xzalloc(sizeof(*tv));
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+
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+ memset(&body, 0, sizeof(body));
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+ zero_out_var(&tv);
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+ pos = str;
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+ seq = &body;
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+
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+ /* end of expression, assume that there's going to be a free byte
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+ * at the end of the string that can be used for the ')' */
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+ strcat(str + strlen(str), ")");
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+ return getvar_s(evaluate(parse_expr(TC_SEQTERM), &tv));
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+ strcat(str + strlen(str), "}");
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+ n = parse_expr(TC_GRPTERM);
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+ if (!n)
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+ return NULL;
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+
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+ return evaluate(n, tv);
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+}
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+
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+static inline void print_translate(char *s)
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@ -427,63 +447,78 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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+ free(str);
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+}
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+
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+/* process awk calls in a template line and print the output to stdout */
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+static void render_line(char *fname, int lnr, char *line)
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+static void render_element(struct template_cb *tcb, struct template_element *e)
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+{
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+ char *tok[MAX_TR * 3];
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+ char *l, *p, *p2, *res;
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+ int len = 0, _pos = 0, i;
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+
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+ l = line;
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+ while (l != NULL) {
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+ if ((p = strstr(l, SSI_START)) == NULL) {
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+ len += strlen((tok[_pos++] = l));
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+ var *v;
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+ char *s;
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+ if (!e || !e->var)
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+ return;
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+ lineno = e->line;
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+ switch (e->t) {
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+ case T_TEXT:
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+ s = strdup(e->var);
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+ print_translate(s);
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+ free(s);
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+ break;
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+ }
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+
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+ p2 = strstr(p, SSI_END);
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+ if (p2 == NULL) {
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+ fprintf(stderr, "Parse error in '%s', line '%d', unmatched %s\n", fname, lnr, SSI_END);
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+ case T_CODE:
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+ s = strdup(e->var);
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+ v = parse_awk(s);
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+ free(s);
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+ s = strdup(getvar_s(v));
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+ print_translate(s);
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+ free(s);
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+ break;
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+ }
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+ case T_IF:
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+ s = strdup(e->var);
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+ v = parse_awk(s);
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+ free(s);
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+ if (!v)
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+ return;
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+ if (istrue(v))
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+ execute_template(tcb, e->sub);
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+ else if (e->sub2)
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+ execute_template(tcb, e->sub2);
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+
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+ *p = 0;
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+ *p2 = 0;
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+
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+ len += strlen((tok[_pos++] = l));
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+ len += strlen((tok[_pos++] = render_lookup(fname, lnr, p + strlen(SSI_START))));
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+
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+ l = p2;
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+ l += strlen(SSI_END);
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+ clrvar(v);
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+ break;
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+ case T_FOR: {
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+ v = newvar(e->var);
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+ hashwalk_init(v, iamarray(findvar(vhash, e->in)));
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+ while (hashwalk_next(v)) {
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+ execute_template(tcb, e->sub);
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+ }
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+ }
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+ break;
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+ default:
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+ break;
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+ }
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+ len++;
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+
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+ p = xmalloc(len + 1);
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+ *p = 0;
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+ res = p;
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+ for (i = 0; i < _pos; i++) {
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+ strcat(p, tok[i]);
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+ p += strlen(tok[i]);
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+ }
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+ print_translate(res);
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+ free(res);
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+}
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+
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+/* awk method render(), which opens a template file and processes all awk ssi calls */
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+static void render_file(char *filename)
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+{
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+ int lnr = 0;
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+ struct template_cb tcb;
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+ struct template_element *e;
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+ FILE *f;
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+ char *buf1;
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+ char *oldprg;
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+ int oldlnr;
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+
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+ oldlnr = lineno;
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+ oldprg = programname;
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+ programname = filename;
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+
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+ f = fopen(filename, "r");
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+ if (!f)
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+ return;
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+
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+ buf1 = xmalloc(LINE_BUF);
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+ while (!feof(f) && (fgets(buf1, LINE_BUF - 1, f) != NULL)) {
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+ render_line(filename, ++lnr, buf1);
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+ }
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+ memset(&tcb, 0, sizeof(tcb));
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+ tcb.handle_element = render_element;
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+ e = parse_template(&tcb, f);
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+ execute_template(&tcb, e);
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+ free_template(&tcb, e);
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+ fclose(f);
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+ programname = oldprg;
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+ lineno = oldlnr;
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+}
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+
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+static var *render(var *res, var *args, int nargs)
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@ -689,9 +724,357 @@ diff -purN bb.old/editors/awx.c bb.dev/editors/awx.c
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+ return awk_main(argc, argv);
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+}
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+
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diff -purN bb.old/editors/awx_parser.h bb.dev/editors/awx_parser.h
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--- bb.old/editors/awx_parser.h 1970-01-01 01:00:00.000000000 +0100
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+++ bb.dev/editors/awx_parser.h 2007-05-20 08:30:30.010685144 +0200
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@@ -0,0 +1,38 @@
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+#ifndef __TEMPLATE_PARSER_H
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+#define __TEMPLATE_PARSER_H
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+
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+enum type {
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+ T_TEXT,
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+ T_FOR,
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+ T_IF,
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+ T_CODE
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+};
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+
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+struct template_element;
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+struct template_cb;
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+
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+struct template_cb {
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+ void *(*prepare_code)(struct template_element *);
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+ void (*handle_element)(struct template_cb *, struct template_element *);
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+ void (*free_code)(struct template_element *);
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+};
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+
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+struct template_element {
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+ enum type t;
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+ char *var;
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+ char *in;
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+ int line;
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+ void *priv;
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+ struct template_element *parent;
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+ struct template_element *sub;
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+ struct template_element *sub2;
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+ struct template_element *prev;
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+ struct template_element *next;
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+};
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+
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+
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+struct template_element *parse_template(struct template_cb *cb, FILE *in);
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+void execute_template(struct template_cb *cb, struct template_element *e);
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+void free_template(struct template_cb *cb, struct template_element *e);
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+
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+#endif
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diff -purN bb.old/editors/awx_parser.l bb.dev/editors/awx_parser.l
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--- bb.old/editors/awx_parser.l 1970-01-01 01:00:00.000000000 +0100
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+++ bb.dev/editors/awx_parser.l 2007-05-20 08:30:55.698779960 +0200
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@@ -0,0 +1,302 @@
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+%{
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+#include <stdio.h>
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+#include <string.h>
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+#include <stdlib.h>
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+#include "busybox.h"
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+#include "awx_parser.h"
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+
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+enum {
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+ S_INIT,
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+ S_TEXT,
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+ S_CODE,
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+ S_IF_START,
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+ S_FOR_START,
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+ S_FOR_IN,
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+ S_END,
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+ S_ELSE,
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+ S_EOF
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+};
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+int state;
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+
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+#undef DEBUG
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+#ifdef DEBUG
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+char *statestr[] = {
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+ [S_INIT] = "S_INIT",
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+ [S_TEXT] = "S_TEXT",
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+ [S_CODE] = "S_CODE",
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+ [S_IF_START] = "S_IF_START",
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+ [S_FOR_START] = "S_FOR_START",
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+ [S_FOR_IN] = "S_FOR_IN",
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+ [S_EOF] = "S_EOF"
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+};
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+
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+char *typestr[] = {
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+ [T_TEXT] = "T_TEXT",
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+ [T_FOR] = "T_FOR",
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+ [T_IF] = "T_IF",
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+ [T_CODE] = "T_CODE"
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+};
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+#endif
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+
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+static struct template_cb *parse_cb;
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+static struct template_element *cur, *head;
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+static char *textbuf;
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+static unsigned int buflen;
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+static unsigned int buf_offset;
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+static int _lnr = 0;
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+
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+static void buf_realloc(void)
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+{
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+ buflen *= 2;
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+ textbuf = xrealloc(textbuf, buflen);
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+}
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+
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+static void parse_error(char *str)
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+{
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+ fprintf(stderr, "Parse error%s%s\n", (str ? ": " : "!"), (str ?: ""));
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+ exit(255);
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+}
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+
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+
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+static struct template_element *new_template_element(struct template_element *parent)
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+{
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+ struct template_element *ptr;
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+
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+ ptr = xzalloc(sizeof(*ptr));
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+ ptr->parent = parent;
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+ return ptr;
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+}
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+
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+static inline void next_template_element(void)
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+{
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+ cur->next = new_template_element(cur->parent);
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+ cur->next->prev = cur;
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+ cur = cur->next;
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+}
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+
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+static void addtext(char *text)
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+{
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+ while(buf_offset + strlen(text) + 1 > buflen)
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+ buf_realloc();
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+
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+ buf_offset += sprintf(&textbuf[buf_offset], "%s", text);
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+}
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+
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+static void set_state(int newstate)
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+{
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+ char *ptr;
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+
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+#ifdef DEBUG
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+ static int _rec = 0;
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+ fprintf(stderr, "DEBUG(%d): %s => %s: %s\n", _rec, statestr[state], statestr[newstate], textbuf);
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+#endif
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+ ptr = xstrdup(textbuf);
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+ if (state == S_FOR_IN)
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+ cur->in = ptr;
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+ else
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+ cur->var = ptr;
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+
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+ if (parse_cb && (cur->t == T_CODE) && parse_cb->prepare_code)
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+ parse_cb->prepare_code(cur);
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+
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+ buf_offset = 0;
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+ *textbuf = 0;
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+
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+ switch(newstate) {
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+#if 0
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+ case S_EOF:
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+ if (cur->parent)
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+ parse_error();
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+ break;
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+#endif
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+ case S_FOR_START:
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+ if (ptr || !cur->prev)
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+ next_template_element();
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+ cur->t = T_FOR;
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+ break;
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+ case S_IF_START:
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+ if (ptr || !cur->prev)
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+ next_template_element();
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+ cur->t = T_IF;
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+ break;
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+ case S_ELSE:
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+ cur = cur->parent;
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+ if (!cur)
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+ parse_error("'@else' without parent element");
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+ cur->sub2 = new_template_element(cur);
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+ cur = cur->sub2;
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+ newstate = S_TEXT;
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+ break;
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+ case S_END:
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+#ifdef DEBUG
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+ _rec--;
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+#endif
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+ cur = cur->parent;
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+ if (!cur)
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+ parse_error("'@end' without parent element");
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+
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+ next_template_element();
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+ cur->t = T_TEXT;
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+ newstate = S_TEXT;
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+ break;
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+ case S_TEXT:
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+ switch (cur->t) {
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+ case T_CODE:
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+ next_template_element();
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+ break;
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+ case T_IF:
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+ case T_FOR:
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+#ifdef DEBUG
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+ _rec++;
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+#endif
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+ cur->sub = new_template_element(cur);
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+ cur = cur->sub;
|
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+ break;
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+ default:
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+ break;
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+ }
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+ cur->t = T_TEXT;
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+ break;
|
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+ case S_CODE:
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+ if (ptr || !cur->prev)
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+ next_template_element();
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+ cur->t = T_CODE;
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+ break;
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+ default:
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+ break;
|
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+ }
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+ cur->line = _lnr;
|
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+ state = newstate;
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+}
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+
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+%}
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+
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+%%
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+"<%"[ \n\t]*"@if"[ \n\t]+ {
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+ if (state == S_TEXT)
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+ set_state(S_IF_START);
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+ else
|
||||
+ REJECT;
|
||||
+}
|
||||
+
|
||||
+"<%"[ \n\t]*"@for"[ \n\t]+ {
|
||||
+ if (state == S_TEXT)
|
||||
+ set_state(S_FOR_START);
|
||||
+ else
|
||||
+ REJECT;
|
||||
+}
|
||||
+
|
||||
+[ \n\t]+"in"[ \n\t]+ {
|
||||
+ if (state == S_FOR_START)
|
||||
+ set_state(S_FOR_IN);
|
||||
+ else
|
||||
+ REJECT;
|
||||
+}
|
||||
+
|
||||
+"<%"[ \n\t]*"@end"[ \n\t]*%> {
|
||||
+ if (state != S_TEXT)
|
||||
+ REJECT;
|
||||
+ set_state(S_END);
|
||||
+}
|
||||
+
|
||||
+"<%"[ \n\t]*"@else"[ \n\t]*%> {
|
||||
+ if (state != S_TEXT)
|
||||
+ REJECT;
|
||||
+ set_state(S_ELSE);
|
||||
+}
|
||||
+
|
||||
+"<%" {
|
||||
+ if (state != S_TEXT)
|
||||
+ parse_error("'<%' cannot be nested");
|
||||
+ set_state(S_CODE);
|
||||
+}
|
||||
+
|
||||
+[ \n\t]"%>" {
|
||||
+ if (state == S_TEXT)
|
||||
+ REJECT;
|
||||
+ set_state(S_TEXT);
|
||||
+}
|
||||
+
|
||||
+\n {
|
||||
+ _lnr++;
|
||||
+ if (state == S_TEXT)
|
||||
+ addtext(yytext);
|
||||
+}
|
||||
+. {
|
||||
+ addtext(yytext);
|
||||
+}
|
||||
+
|
||||
+
|
||||
+%%
|
||||
+
|
||||
+
|
||||
+void execute_template(struct template_cb *cb, struct template_element *e)
|
||||
+{
|
||||
+ static int rec = 0;
|
||||
+
|
||||
+ while (e) {
|
||||
+#ifdef DEBUG
|
||||
+ fprintf(stderr, "DEBUG: execute(%d)\t%s\n", rec, typestr[e->t]);
|
||||
+#endif
|
||||
+ rec++;
|
||||
+ if (cb->handle_element)
|
||||
+ cb->handle_element(cb, e);
|
||||
+ rec--;
|
||||
+ e = e->next;
|
||||
+ }
|
||||
+}
|
||||
+
|
||||
+int yywrap()
|
||||
+{
|
||||
+ set_state(S_EOF);
|
||||
+ return 1;
|
||||
+}
|
||||
+
|
||||
+struct template_element *parse_template(struct template_cb *cb, FILE *in)
|
||||
+{
|
||||
+ _lnr = 1;
|
||||
+ buf_offset = 0;
|
||||
+ state = S_TEXT;
|
||||
+ parse_cb = cb;
|
||||
+
|
||||
+ buflen = 4096;
|
||||
+ textbuf = xzalloc(buflen);
|
||||
+
|
||||
+ head = xzalloc(sizeof(*head));
|
||||
+ head->t = T_TEXT;
|
||||
+ cur = head;
|
||||
+
|
||||
+ yyin = in;
|
||||
+ yylex();
|
||||
+
|
||||
+ return head;
|
||||
+}
|
||||
+
|
||||
+void free_template(struct template_cb *cb, struct template_element *e)
|
||||
+{
|
||||
+ struct template_element *next;
|
||||
+
|
||||
+ if (!e)
|
||||
+ return;
|
||||
+
|
||||
+ switch (e->t) {
|
||||
+ case T_CODE:
|
||||
+ if (cb->free_code)
|
||||
+ cb->free_code(e);
|
||||
+ break;
|
||||
+ case T_FOR:
|
||||
+ case T_IF:
|
||||
+ free_template(cb, e->sub);
|
||||
+ break;
|
||||
+ default:
|
||||
+ break;
|
||||
+ }
|
||||
+ if (e->var)
|
||||
+ free(e->var);
|
||||
+ if (e->in)
|
||||
+ free(e->in);
|
||||
+
|
||||
+ next = e->next;
|
||||
+ free(e);
|
||||
+ return free_template(cb, next);
|
||||
+}
|
||||
diff -purN bb.old/editors/Config.in bb.dev/editors/Config.in
|
||||
--- bb.old/editors/Config.in 2007-01-24 22:34:50.000000000 +0100
|
||||
+++ bb.dev/editors/Config.in 2007-03-11 06:19:51.469380160 +0100
|
||||
--- bb.old/editors/Config.in 2007-05-20 04:17:05.003197632 +0200
|
||||
+++ bb.dev/editors/Config.in 2007-05-20 04:16:47.180907032 +0200
|
||||
@@ -12,6 +12,13 @@ config AWK
|
||||
Awk is used as a pattern scanning and processing language. This is
|
||||
the BusyBox implementation of that programming language.
|
||||
@ -706,9 +1089,25 @@ diff -purN bb.old/editors/Config.in bb.dev/editors/Config.in
|
||||
config FEATURE_AWK_MATH
|
||||
bool "Enable math functions (requires libm)"
|
||||
default y
|
||||
diff -purN bb.old/editors/Kbuild bb.dev/editors/Kbuild
|
||||
--- bb.old/editors/Kbuild 2007-03-18 17:59:37.000000000 +0100
|
||||
+++ bb.dev/editors/Kbuild 2007-05-20 05:13:45.363264328 +0200
|
||||
@@ -10,3 +10,12 @@ lib-$(CONFIG_ED) += ed.o
|
||||
lib-$(CONFIG_PATCH) += patch.o
|
||||
lib-$(CONFIG_SED) += sed.o
|
||||
lib-$(CONFIG_VI) += vi.o
|
||||
+lib-$(CONFIG_AWX) += awx_parser.o
|
||||
+
|
||||
+editors/awx_parser.c: editors/awx_parser.l editors/awx_parser.h
|
||||
+ @flex $<
|
||||
+ @mv lex.yy.c $@
|
||||
+
|
||||
+editors/awx_parser.o: editors/awx_parser.c FORCE
|
||||
+ $(call cmd,force_checksrc)
|
||||
+ $(call if_changed_rule,cc_o_c)
|
||||
diff -purN bb.old/include/applets.h bb.dev/include/applets.h
|
||||
--- bb.old/include/applets.h 2007-03-06 19:38:07.355081000 +0100
|
||||
+++ bb.dev/include/applets.h 2007-03-07 02:12:24.280681880 +0100
|
||||
--- bb.old/include/applets.h 2007-05-20 04:17:05.003197632 +0200
|
||||
+++ bb.dev/include/applets.h 2007-05-20 04:16:47.180907032 +0200
|
||||
@@ -60,6 +60,7 @@ USE_ARP(APPLET(arp, _BB_DIR_SBIN, _BB_SU
|
||||
USE_ARPING(APPLET(arping, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
|
||||
USE_ASH(APPLET_NOUSAGE(ash, ash, _BB_DIR_BIN, _BB_SUID_NEVER))
|
||||
@ -719,7 +1118,7 @@ diff -purN bb.old/include/applets.h bb.dev/include/applets.h
|
||||
//USE_BBSH(APPLET(bbsh, _BB_DIR_BIN, _BB_SUID_NEVER))
|
||||
diff -purN bb.old/include/cgi.h bb.dev/include/cgi.h
|
||||
--- bb.old/include/cgi.h 1970-01-01 01:00:00.000000000 +0100
|
||||
+++ bb.dev/include/cgi.h 2007-03-11 18:58:10.708444448 +0100
|
||||
+++ bb.dev/include/cgi.h 2007-05-20 04:16:47.180907032 +0200
|
||||
@@ -0,0 +1,8 @@
|
||||
+#ifndef CGI_H
|
||||
+#define CGI_H
|
||||
@ -731,7 +1130,7 @@ diff -purN bb.old/include/cgi.h bb.dev/include/cgi.h
|
||||
+#endif
|
||||
diff -purN bb.old/libbb/cgi.c bb.dev/libbb/cgi.c
|
||||
--- bb.old/libbb/cgi.c 1970-01-01 01:00:00.000000000 +0100
|
||||
+++ bb.dev/libbb/cgi.c 2007-03-11 19:02:04.691873560 +0100
|
||||
+++ bb.dev/libbb/cgi.c 2007-05-20 04:16:47.181906880 +0200
|
||||
@@ -0,0 +1,457 @@
|
||||
+/* --------------------------------------------------------------------------
|
||||
+ * functions for processing cgi form data
|
||||
@ -1191,8 +1590,8 @@ diff -purN bb.old/libbb/cgi.c bb.dev/libbb/cgi.c
|
||||
+ return retval;
|
||||
+}
|
||||
diff -purN bb.old/libbb/Kbuild bb.dev/libbb/Kbuild
|
||||
--- bb.old/libbb/Kbuild 2007-03-06 19:38:07.361080000 +0100
|
||||
+++ bb.dev/libbb/Kbuild 2007-03-11 18:40:51.384445712 +0100
|
||||
--- bb.old/libbb/Kbuild 2007-05-20 04:17:05.004197480 +0200
|
||||
+++ bb.dev/libbb/Kbuild 2007-05-20 04:16:47.181906880 +0200
|
||||
@@ -118,3 +118,6 @@ lib-$(CONFIG_GREP) += xregcomp.o
|
||||
lib-$(CONFIG_MDEV) += xregcomp.o
|
||||
lib-$(CONFIG_LESS) += xregcomp.o
|
||||
|
||||
Loading…
Reference in New Issue
Block a user