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![Klemens Friedl](/assets/img/avatar_default.png)
* sumatrapdf - vendor import * everything compiles (libjpeg, poppler, fitz, sumatrapdf) * does NOT link (remove the comment tags in the parent directory.rbuild file (rosapps dir) to build it) svn path=/trunk/; revision=29295
114 lines
1.6 KiB
C
114 lines
1.6 KiB
C
#include "fitz-base.h"
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#include "fitz-stream.h"
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typedef struct fz_ahxd_s fz_ahxd;
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struct fz_ahxd_s
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{
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fz_filter super;
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int odd;
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int a;
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};
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static inline int iswhite(int a)
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{
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switch (a) {
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case '\n': case '\r': case '\t': case ' ':
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case '\0': case '\f': case '\b': case 0177:
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return 1;
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}
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return 0;
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}
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static inline int ishex(int a)
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{
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return (a >= 'A' && a <= 'F') ||
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(a >= 'a' && a <= 'f') ||
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(a >= '0' && a <= '9');
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}
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static inline int fromhex(int a)
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{
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if (a >= 'A' && a <= 'F')
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return a - 'A' + 0xA;
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if (a >= 'a' && a <= 'f')
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return a - 'a' + 0xA;
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if (a >= '0' && a <= '9')
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return a - '0';
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return 0;
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}
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fz_error *
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fz_newahxd(fz_filter **fp, fz_obj *params)
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{
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FZ_NEWFILTER(fz_ahxd, f, ahxd);
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f->odd = 0;
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f->a = 0;
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return nil;
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}
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void
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fz_dropahxd(fz_filter *f)
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{
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}
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fz_error *
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fz_processahxd(fz_filter *filter, fz_buffer *in, fz_buffer *out)
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{
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fz_ahxd *f = (fz_ahxd*)filter;
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int b, c;
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while (1)
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{
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if (in->rp == in->wp)
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return fz_ioneedin;
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if (out->wp == out->ep)
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return fz_ioneedout;
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c = *in->rp++;
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if (ishex(c)) {
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if (!f->odd) {
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f->a = fromhex(c);
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f->odd = 1;
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}
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else {
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b = fromhex(c);
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*out->wp++ = (f->a << 4) | b;
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f->odd = 0;
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}
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}
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else if (c == '>') {
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if (f->odd)
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*out->wp++ = (f->a << 4);
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out->eof = 1;
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return fz_iodone;
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}
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else if (!iswhite(c)) {
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return fz_throw("ioerror: bad data in ahxd: '%c'", c);
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}
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}
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}
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void
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fz_pushbackahxd(fz_filter *filter, fz_buffer *in, fz_buffer *out, int n)
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{
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int k;
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assert(filter->process == fz_processahxd);
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assert(out->wp - n >= out->rp);
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k = 0;
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while (k < n * 2) {
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in->rp --;
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if (ishex(*in->rp))
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k ++;
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}
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out->wp -= n;
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}
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