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authorKristaps Dzonsons <kristaps@bsd.lv>2011-07-17 12:13:37 +0000
committerKristaps Dzonsons <kristaps@bsd.lv>2011-07-17 12:13:37 +0000
commitc65bd324370683e30cc03e16fa78b9ee7059a19e (patch)
treec34b88eba1bd0d2dcc069e123f0195ac92ddbac0 /eqn.c
parente1668c2d072b1ff1b0f569174c78d672523280a2 (diff)
downloadmandoc-c65bd324370683e30cc03e16fa78b9ee7059a19e.tar.gz
Add initial `define' support for eqn(7).
This works by iterating over a simple list. It's a slow, auditable early implementation. Data is read (the reading function will be reused) then parsed, then the line re-run if remaining stuff exists. Note this function isn't the same as mandoc_getarg(), as eqn(7) uses a different system for reading quoted strings. This doesn't actually use the defines.
Diffstat (limited to 'eqn.c')
-rw-r--r--eqn.c117
1 files changed, 111 insertions, 6 deletions
diff --git a/eqn.c b/eqn.c
index 2df45969..2ea4552d 100644
--- a/eqn.c
+++ b/eqn.c
@@ -28,12 +28,18 @@
#include "libmandoc.h"
#include "libroff.h"
+static const char *eqn_nexttok(struct mparse *, int, int,
+ const char **, size_t *);
+
/* ARGSUSED */
enum rofferr
-eqn_read(struct eqn_node **epp, int ln, const char *p, int offs)
+eqn_read(struct eqn_node **epp, int ln,
+ const char *p, int pos, int *offs)
{
- size_t sz;
- struct eqn_node *ep;
+ size_t sz;
+ struct eqn_node *ep;
+ const char *start, *end;
+ int i;
if (0 == strcmp(p, ".EN")) {
*epp = NULL;
@@ -41,14 +47,69 @@ eqn_read(struct eqn_node **epp, int ln, const char *p, int offs)
}
ep = *epp;
+ end = p + pos;
+ start = eqn_nexttok(ep->parse, ln, pos, &end, &sz);
+
+ if (NULL == start)
+ return(ROFF_IGN);
+
+ if (6 == sz && 0 == strncmp("define", start, 6)) {
+ /*
+ * TODO: warn if key is quoted: groff doesn't seem to
+ * like this (I don't know why).
+ */
+ start = eqn_nexttok(ep->parse, ln, pos, &end, &sz);
+ for (i = 0; i < (int)ep->defsz; i++) {
+ if (ep->defs[i].keysz != sz)
+ continue;
+ if (0 == strncmp(ep->defs[i].key, start, sz))
+ break;
+ }
+
+ /*
+ * TODO: merge this code with roff_getstr().
+ */
+
+ if (i == (int)ep->defsz) {
+ ep->defsz++;
+ ep->defs = mandoc_realloc
+ (ep->defs, ep->defsz *
+ sizeof(struct eqn_def));
+ ep->defs[i].keysz = sz;
+ ep->defs[i].key = mandoc_malloc(sz + 1);
+ memcpy(ep->defs[i].key, start, sz);
+ ep->defs[i].key[(int)sz] = '\0';
+ ep->defs[i].val = NULL;
+ ep->defs[i].valsz = 0;
+ }
+
+ start = eqn_nexttok(ep->parse, ln, pos, &end, &sz);
+
+ ep->defs[i].valsz = sz;
+ ep->defs[i].val = mandoc_realloc
+ (ep->defs[i].val, sz + 1);
+ memcpy(ep->defs[i].val, start, sz);
+ ep->defs[i].val[(int)sz] = '\0';
+
+ if ('\0' == *end)
+ return(ROFF_IGN);
+
+ *offs = end - (p + pos);
+ assert(*offs > 0);
+
+ return(ROFF_RERUN);
+ } else
+ end = p + pos;
+
+ if (0 == (sz = strlen(end)))
+ return(ROFF_IGN);
- sz = strlen(&p[offs]);
ep->eqn.data = mandoc_realloc(ep->eqn.data, ep->eqn.sz + sz + 1);
if (0 == ep->eqn.sz)
*ep->eqn.data = '\0';
ep->eqn.sz += sz;
- strlcat(ep->eqn.data, &p[offs], ep->eqn.sz + 1);
+ strlcat(ep->eqn.data, end, ep->eqn.sz + 1);
return(ROFF_IGN);
}
@@ -59,7 +120,6 @@ eqn_alloc(int pos, int line, struct mparse *parse)
p = mandoc_calloc(1, sizeof(struct eqn_node));
p->parse = parse;
-
p->eqn.line = line;
p->eqn.pos = pos;
@@ -77,7 +137,52 @@ eqn_end(struct eqn_node *e)
void
eqn_free(struct eqn_node *p)
{
+ int i;
free(p->eqn.data);
+
+ for (i = 0; i < (int)p->defsz; i++) {
+ free(p->defs[i].key);
+ free(p->defs[i].val);
+ }
+
+ free(p->defs);
free(p);
}
+
+static const char *
+eqn_nexttok(struct mparse *mp, int ln, int pos,
+ const char **next, size_t *sz)
+{
+ const char *start;
+ int q;
+
+ start = *next;
+ q = 0;
+
+ if ('\0' == *start)
+ return(NULL);
+
+ if ('"' == *start) {
+ start++;
+ q = 1;
+ }
+
+ *next = q ? strchr(start, '"') : strchr(start, ' ');
+
+ if (NULL != *next) {
+ *sz = (size_t)(*next - start);
+ if (q)
+ (*next)++;
+ while (' ' == **next)
+ (*next)++;
+ } else {
+ if (q)
+ mandoc_msg(MANDOCERR_BADQUOTE,
+ mp, ln, pos, NULL);
+ *next = strchr(start, '\0');
+ *sz = (size_t)(*next - start);
+ }
+
+ return(start);
+}