diff options
Diffstat (limited to 'xps/xps_util.c')
-rw-r--r-- | xps/xps_util.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/xps/xps_util.c b/xps/xps_util.c new file mode 100644 index 00000000..76175d68 --- /dev/null +++ b/xps/xps_util.c @@ -0,0 +1,94 @@ +#include "fitz.h" +#include "muxps.h" + +static inline int tolower(int c) +{ + if (c >= 'A' && c <= 'Z') + return c + 32; + return c; +} + +int +xps_strcasecmp(char *a, char *b) +{ + while (tolower(*a) == tolower(*b)) + { + if (*a++ == 0) + return 0; + b++; + } + return tolower(*a) - tolower(*b); +} + +#define SEP(x) ((x)=='/' || (x) == 0) + +static char * +xps_clean_path(char *name) +{ + char *p, *q, *dotdot; + int rooted; + + rooted = name[0] == '/'; + + /* + * invariants: + * p points at beginning of path element we're considering. + * q points just past the last path element we wrote (no slash). + * dotdot points just past the point where .. cannot backtrack + * any further (no slash). + */ + p = q = dotdot = name + rooted; + while (*p) + { + if(p[0] == '/') /* null element */ + p++; + else if (p[0] == '.' && SEP(p[1])) + p += 1; /* don't count the separator in case it is nul */ + else if (p[0] == '.' && p[1] == '.' && SEP(p[2])) + { + p += 2; + if (q > dotdot) /* can backtrack */ + { + while(--q > dotdot && *q != '/') + ; + } + else if (!rooted) /* /.. is / but ./../ is .. */ + { + if (q != name) + *q++ = '/'; + *q++ = '.'; + *q++ = '.'; + dotdot = q; + } + } + else /* real path element */ + { + if (q != name+rooted) + *q++ = '/'; + while ((*q = *p) != '/' && *q != 0) + p++, q++; + } + } + + if (q == name) /* empty string is really "." */ + *q++ = '.'; + *q = '\0'; + + return name; +} + +void +xps_absolute_path(char *output, char *base_uri, char *path, int output_size) +{ + if (path[0] == '/') + { + fz_strlcpy(output, path, output_size); + } + else + { + fz_strlcpy(output, base_uri, output_size); + fz_strlcat(output, "/", output_size); + fz_strlcat(output, path, output_size); + } + xps_clean_path(output); +} |