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authorAndrew Gregory <andrew.gregory.8@gmail.com>2019-06-09 18:54:02 +0200
committerAndrew Gregory <andrew.gregory.8@gmail.com>2019-10-12 03:49:38 +0200
commita2c4ad46751e4dcb85a739437d9331bf9282d9be (patch)
treebab6c048fb7eb2ffb37e4ba057a176d85990d650 /src/common/util-common.c
parenta897599fa54813ea2a225271eacd9fb6e1a6762e (diff)
downloadpacman-a2c4ad46751e4dcb85a739437d9331bf9282d9be.tar.gz
pacman-a2c4ad46751e4dcb85a739437d9331bf9282d9be.tar.xz
move wordsplit into common for sharing
Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
Diffstat (limited to 'src/common/util-common.c')
-rw-r--r--src/common/util-common.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/common/util-common.c b/src/common/util-common.c
index 3aa0eac9..fd91ecec 100644
--- a/src/common/util-common.c
+++ b/src/common/util-common.c
@@ -197,3 +197,115 @@ char *strndup(const char *s, size_t n)
return (char *)memcpy(new, s, len);
}
#endif
+
+void wordsplit_free(char **ws)
+{
+ if(ws) {
+ char **c;
+ for(c = ws; *c; c++) {
+ free(*c);
+ }
+ free(ws);
+ }
+}
+
+char **wordsplit(const char *str)
+{
+ const char *c = str, *end;
+ char **out = NULL, **outsave;
+ size_t count = 0;
+
+ if(str == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ for(c = str; isspace(*c); c++);
+ while(*c) {
+ size_t wordlen = 0;
+
+ /* extend our array */
+ outsave = out;
+ if((out = realloc(out, (count + 1) * sizeof(char*))) == NULL) {
+ out = outsave;
+ goto error;
+ }
+
+ /* calculate word length and check for unbalanced quotes */
+ for(end = c; *end && !isspace(*end); end++) {
+ if(*end == '\'' || *end == '"') {
+ char quote = *end;
+ while(*(++end) && *end != quote) {
+ if(*end == '\\' && *(end + 1) == quote) {
+ end++;
+ }
+ wordlen++;
+ }
+ if(*end != quote) {
+ errno = EINVAL;
+ goto error;
+ }
+ } else {
+ if(*end == '\\' && (end[1] == '\'' || end[1] == '"')) {
+ end++; /* skip the '\\' */
+ }
+ wordlen++;
+ }
+ }
+
+ if(wordlen == (size_t) (end - c)) {
+ /* no internal quotes or escapes, copy it the easy way */
+ if((out[count++] = strndup(c, wordlen)) == NULL) {
+ goto error;
+ }
+ } else {
+ /* manually copy to remove quotes and escapes */
+ char *dest = out[count++] = malloc(wordlen + 1);
+ if(dest == NULL) { goto error; }
+ while(c < end) {
+ if(*c == '\'' || *c == '"') {
+ char quote = *c;
+ /* we know there must be a matching end quote,
+ * no need to check for '\0' */
+ for(c++; *c != quote; c++) {
+ if(*c == '\\' && *(c + 1) == quote) {
+ c++;
+ }
+ *(dest++) = *c;
+ }
+ c++;
+ } else {
+ if(*c == '\\' && (c[1] == '\'' || c[1] == '"')) {
+ c++; /* skip the '\\' */
+ }
+ *(dest++) = *(c++);
+ }
+ }
+ *dest = '\0';
+ }
+
+ if(*end == '\0') {
+ break;
+ } else {
+ for(c = end + 1; isspace(*c); c++);
+ }
+ }
+
+ outsave = out;
+ if((out = realloc(out, (count + 1) * sizeof(char*))) == NULL) {
+ out = outsave;
+ goto error;
+ }
+
+ out[count++] = NULL;
+
+ return out;
+
+error:
+ /* can't use wordsplit_free here because NULL has not been appended */
+ while(count) {
+ free(out[--count]);
+ }
+ free(out);
+ return NULL;
+}