[PATCH 2/3] interpolate.[ch]: Add a function to find which interpolations are active.

From

Johannes Schindelin <johannes.schindelin@gmx.de>

Date

Nov 4, 2007, 19:15 UTC

Message-ID

<Pine.LNX.4.64.0711041915120.4362@racer.site>

In-Reply-To

<Pine.LNX.4.64.0711041912190.4362@racer.site>

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 interpolate.c |   20 ++++++++++++++++++++
 interpolate.h |    2 ++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/interpolate.c b/interpolate.c
index 6ef53f2..80eeb36 100644
--- a/interpolate.c
+++ b/interpolate.c
@@ -102,3 +102,23 @@ unsigned long interpolate(char *result, unsigned long reslen,
 		*dest = '\0';
 	return newlen;
 }
+
+char *interp_find_active(const char *orig,
+		const struct interp *interps, int ninterps)
+{
+	char *result = xcalloc(1, ninterps);
+	char c;
+	int i;
+
+	while ((c = *(orig++)))
+		if (c == '%')
+			/* Try to match an interpolation string. */
+			for (i = 0; i < ninterps; i++)
+				if (!prefixcmp(orig, interps[i].name + 1)) {
+					result[i] = 1;
+					orig += strlen(interps[i].name + 1);
+					break;
+				}
+
+	return result;
+}
diff --git a/interpolate.h b/interpolate.h
index 77407e6..2d197c5 100644
--- a/interpolate.h
+++ b/interpolate.h
@@ -22,5 +22,7 @@ extern void interp_clear_table(struct interp *table, int ninterps);
 extern unsigned long interpolate(char *result, unsigned long reslen,
 				 const char *orig,
 				 const struct interp *interps, int ninterps);
+extern char *interp_find_active(const char *orig,
+				const struct interp *interps, int ninterps);
 
 #endif /* INTERPOLATE_H */

-- 
1.5.3.5.1549.g91a3