+
+/* Helper function for sdssplitargs() that returns non zero if 'c'
+ * is a valid hex digit. */
+int is_hex_digit(char c) {
+ return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
+ (c >= 'A' && c <= 'F');
+}
+
+/* Helper function for sdssplitargs() that converts an hex digit into an
+ * integer from 0 to 15 */
+int hex_digit_to_int(char c) {
+ switch(c) {
+ case '0': return 0;
+ case '1': return 1;
+ case '2': return 2;
+ case '3': return 3;
+ case '4': return 4;
+ case '5': return 5;
+ case '6': return 6;
+ case '7': return 7;
+ case '8': return 8;
+ case '9': return 9;
+ case 'a': case 'A': return 10;
+ case 'b': case 'B': return 11;
+ case 'c': case 'C': return 12;
+ case 'd': case 'D': return 13;
+ case 'e': case 'E': return 14;
+ case 'f': case 'F': return 15;
+ default: return 0;
+ }
+}
+
+/* Split a line into arguments, where every argument can be in the
+ * following programming-language REPL-alike form:
+ *
+ * foo bar "newline are supported\n" and "\xff\x00otherstuff"
+ *
+ * The number of arguments is stored into *argc, and an array
+ * of sds is returned. The caller should sdsfree() all the returned
+ * strings and finally zfree() the array itself.
+ *
+ * Note that sdscatrepr() is able to convert back a string into
+ * a quoted string in the same format sdssplitargs() is able to parse.
+ */
+sds *sdssplitargs(const char *line, int *argc) {
+ const char *p = line;
+ char *current = NULL;
+ char **vector = NULL;
+
+ *argc = 0;
+ while(1) {
+ /* skip blanks */
+ while(*p && isspace(*p)) p++;
+ if (*p) {
+ /* get a token */
+ int inq=0; /* set to 1 if we are in "quotes" */
+ int insq=0; /* set to 1 if we are in 'single quotes' */
+ int done=0;
+
+ if (current == NULL) current = sdsempty();
+ while(!done) {
+ if (inq) {
+ if (*p == '\\' && *(p+1) == 'x' &&
+ is_hex_digit(*(p+2)) &&
+ is_hex_digit(*(p+3)))
+ {
+ unsigned char byte;
+
+ byte = (hex_digit_to_int(*(p+2))*16)+
+ hex_digit_to_int(*(p+3));
+ current = sdscatlen(current,(char*)&byte,1);
+ p += 3;
+ } else if (*p == '\\' && *(p+1)) {
+ char c;
+
+ p++;
+ switch(*p) {
+ case 'n': c = '\n'; break;
+ case 'r': c = '\r'; break;
+ case 't': c = '\t'; break;
+ case 'b': c = '\b'; break;
+ case 'a': c = '\a'; break;
+ default: c = *p; break;
+ }
+ current = sdscatlen(current,&c,1);
+ } else if (*p == '"') {
+ /* closing quote must be followed by a space or
+ * nothing at all. */
+ if (*(p+1) && !isspace(*(p+1))) goto err;
+ done=1;
+ } else if (!*p) {
+ /* unterminated quotes */
+ goto err;
+ } else {
+ current = sdscatlen(current,p,1);
+ }
+ } else if (insq) {
+ if (*p == '\\' && *(p+1) == '\'') {
+ p++;
+ current = sdscatlen(current,"'",1);
+ } else if (*p == '\'') {
+ /* closing quote must be followed by a space or
+ * nothing at all. */
+ if (*(p+1) && !isspace(*(p+1))) goto err;
+ done=1;
+ } else if (!*p) {
+ /* unterminated quotes */
+ goto err;
+ } else {
+ current = sdscatlen(current,p,1);
+ }
+ } else {
+ switch(*p) {
+ case ' ':
+ case '\n':
+ case '\r':
+ case '\t':
+ case '\0':
+ done=1;
+ break;
+ case '"':
+ inq=1;
+ break;
+ case '\'':
+ insq=1;
+ break;
+ default:
+ current = sdscatlen(current,p,1);
+ break;
+ }
+ }
+ if (*p) p++;
+ }
+ /* add the token to the vector */
+ vector = zrealloc(vector,((*argc)+1)*sizeof(char*));
+ vector[*argc] = current;
+ (*argc)++;
+ current = NULL;
+ } else {
+ return vector;
+ }
+ }
+
+err:
+ while((*argc)--)
+ sdsfree(vector[*argc]);
+ zfree(vector);
+ if (current) sdsfree(current);
+ return NULL;
+}
+
+void sdssplitargs_free(sds *argv, int argc) {
+ int j;
+
+ for (j = 0 ;j < argc; j++) sdsfree(argv[j]);
+ zfree(argv);
+}
+
+/* Modify the string substituting all the occurrences of the set of
+ * characters specifed in the 'from' string to the corresponding character
+ * in the 'to' array.
+ *
+ * For instance: sdsmapchars(mystring, "ho", "01", 2)
+ * will have the effect of turning the string "hello" into "0ell1".
+ *
+ * The function returns the sds string pointer, that is always the same
+ * as the input pointer since no resize is needed. */
+sds sdsmapchars(sds s, const char *from, const char *to, size_t setlen) {
+ size_t j, i, l = sdslen(s);
+
+ for (j = 0; j < l; j++) {
+ for (i = 0; i < setlen; i++) {
+ if (s[j] == from[i]) {
+ s[j] = to[i];
+ break;
+ }
+ }
+ }
+ return s;
+}
+
+#ifdef SDS_TEST_MAIN
+#include <stdio.h>
+#include "testhelp.h"
+
+int main(void) {
+ {
+ struct sdshdr *sh;
+ sds x = sdsnew("foo"), y;
+
+ test_cond("Create a string and obtain the length",
+ sdslen(x) == 3 && memcmp(x,"foo\0",4) == 0)
+
+ sdsfree(x);
+ x = sdsnewlen("foo",2);
+ test_cond("Create a string with specified length",
+ sdslen(x) == 2 && memcmp(x,"fo\0",3) == 0)
+
+ x = sdscat(x,"bar");
+ test_cond("Strings concatenation",
+ sdslen(x) == 5 && memcmp(x,"fobar\0",6) == 0);
+
+ x = sdscpy(x,"a");
+ test_cond("sdscpy() against an originally longer string",
+ sdslen(x) == 1 && memcmp(x,"a\0",2) == 0)
+
+ x = sdscpy(x,"xyzxxxxxxxxxxyyyyyyyyyykkkkkkkkkk");
+ test_cond("sdscpy() against an originally shorter string",
+ sdslen(x) == 33 &&
+ memcmp(x,"xyzxxxxxxxxxxyyyyyyyyyykkkkkkkkkk\0",33) == 0)
+
+ sdsfree(x);
+ x = sdscatprintf(sdsempty(),"%d",123);
+ test_cond("sdscatprintf() seems working in the base case",
+ sdslen(x) == 3 && memcmp(x,"123\0",4) ==0)
+
+ sdsfree(x);
+ x = sdstrim(sdsnew("xxciaoyyy"),"xy");
+ test_cond("sdstrim() correctly trims characters",
+ sdslen(x) == 4 && memcmp(x,"ciao\0",5) == 0)
+
+ y = sdsrange(sdsdup(x),1,1);
+ test_cond("sdsrange(...,1,1)",
+ sdslen(y) == 1 && memcmp(y,"i\0",2) == 0)
+
+ sdsfree(y);
+ y = sdsrange(sdsdup(x),1,-1);
+ test_cond("sdsrange(...,1,-1)",
+ sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0)
+
+ sdsfree(y);
+ y = sdsrange(sdsdup(x),-2,-1);
+ test_cond("sdsrange(...,-2,-1)",
+ sdslen(y) == 2 && memcmp(y,"ao\0",3) == 0)
+
+ sdsfree(y);
+ y = sdsrange(sdsdup(x),2,1);
+ test_cond("sdsrange(...,2,1)",
+ sdslen(y) == 0 && memcmp(y,"\0",1) == 0)
+
+ sdsfree(y);
+ y = sdsrange(sdsdup(x),1,100);
+ test_cond("sdsrange(...,1,100)",
+ sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0)
+
+ sdsfree(y);
+ y = sdsrange(sdsdup(x),100,100);
+ test_cond("sdsrange(...,100,100)",
+ sdslen(y) == 0 && memcmp(y,"\0",1) == 0)
+
+ sdsfree(y);
+ sdsfree(x);
+ x = sdsnew("foo");
+ y = sdsnew("foa");
+ test_cond("sdscmp(foo,foa)", sdscmp(x,y) > 0)
+
+ sdsfree(y);
+ sdsfree(x);
+ x = sdsnew("bar");
+ y = sdsnew("bar");
+ test_cond("sdscmp(bar,bar)", sdscmp(x,y) == 0)
+
+ sdsfree(y);
+ sdsfree(x);
+ x = sdsnew("aar");
+ y = sdsnew("bar");
+ test_cond("sdscmp(bar,bar)", sdscmp(x,y) < 0)
+
+ {
+ int oldfree;
+
+ sdsfree(x);
+ x = sdsnew("0");
+ sh = (void*) (x-(sizeof(struct sdshdr)));
+ test_cond("sdsnew() free/len buffers", sh->len == 1 && sh->free == 0);
+ x = sdsMakeRoomFor(x,1);
+ sh = (void*) (x-(sizeof(struct sdshdr)));
+ test_cond("sdsMakeRoomFor()", sh->len == 1 && sh->free > 0);
+ oldfree = sh->free;
+ x[1] = '1';
+ sdsIncrLen(x,1);
+ test_cond("sdsIncrLen() -- content", x[0] == '0' && x[1] == '1');
+ test_cond("sdsIncrLen() -- len", sh->len == 2);
+ test_cond("sdsIncrLen() -- free", sh->free == oldfree-1);
+ }
+ }
+ test_report()
+ return 0;
+}
+#endif