[PATCH 2/3] interpolate.[ch]: Add a function to find which interpolations are active.
From: Johannes Schindelin <hidden>
Date: 2016-06-15 22:43:47
Subsystem:
the rest · Maintainer:
Linus Torvalds
Some substitutions require pretty expensive operations. So it make sense to find out which are needed to begin with. Signed-off-by: Johannes Schindelin <redacted> --- 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 */
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1.5.3.5.1549.g91a3