95 lines
1.7 KiB
C
95 lines
1.7 KiB
C
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#include "fitz.h"
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#include "muxps.h"
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static inline int xps_tolower(int c)
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{
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if (c >= 'A' && c <= 'Z')
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return c + 32;
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return c;
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}
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int
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xps_strcasecmp(char *a, char *b)
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{
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while (xps_tolower(*a) == xps_tolower(*b))
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{
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if (*a++ == 0)
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return 0;
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b++;
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}
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return xps_tolower(*a) - xps_tolower(*b);
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}
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#define SEP(x) ((x)=='/' || (x) == 0)
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static char *
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xps_clean_path(char *name)
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{
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char *p, *q, *dotdot;
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int rooted;
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rooted = name[0] == '/';
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/*
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* invariants:
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* p points at beginning of path element we're considering.
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* q points just past the last path element we wrote (no slash).
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* dotdot points just past the point where .. cannot backtrack
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* any further (no slash).
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*/
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p = q = dotdot = name + rooted;
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while (*p)
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{
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if(p[0] == '/') /* null element */
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p++;
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else if (p[0] == '.' && SEP(p[1]))
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p += 1; /* don't count the separator in case it is nul */
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else if (p[0] == '.' && p[1] == '.' && SEP(p[2]))
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{
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p += 2;
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if (q > dotdot) /* can backtrack */
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{
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while(--q > dotdot && *q != '/')
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;
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}
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else if (!rooted) /* /.. is / but ./../ is .. */
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{
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if (q != name)
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*q++ = '/';
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*q++ = '.';
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*q++ = '.';
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dotdot = q;
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}
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}
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else /* real path element */
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{
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if (q != name+rooted)
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*q++ = '/';
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while ((*q = *p) != '/' && *q != 0)
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p++, q++;
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}
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}
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if (q == name) /* empty string is really "." */
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*q++ = '.';
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*q = '\0';
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return name;
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}
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void
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xps_absolute_path(char *output, char *base_uri, char *path, int output_size)
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{
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if (path[0] == '/')
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{
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fz_strlcpy(output, path, output_size);
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}
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else
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{
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fz_strlcpy(output, base_uri, output_size);
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fz_strlcat(output, "/", output_size);
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fz_strlcat(output, path, output_size);
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}
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xps_clean_path(output);
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}
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