On Mon, Nov 12, 2018 at 07:46:45PM +0100, Paul B Mahol wrote:
> Copied and adopted from musl implementation.
> * converted all 'long double' to 'double'
>
> Signed-off-by: Paul B Mahol <one...@gmail.com>
> ---
> libavutil/avstring.c | 961 +++++++++++++++++++++++++++++++++++++++++++
> libavutil/avstring.h | 6 +
> 2 files changed, 967 insertions(+)
[...]
> +static int ff_vfscanf(FFFILE *f, const char *fmt, va_list ap)
> +{
> + int width;
> + int size;
> + int base;
> + const unsigned char *p;
> + int c, t;
> + char *s;
> + void *dest=NULL;
> + int invert;
> + int matches=0;
> + unsigned long long x;
> + double y;
> + off_t pos = 0;
> + unsigned char scanset[257];
> + size_t i, k;
> +
> + for (p=(const unsigned char *)fmt; *p; p++) {
> +
> + if (av_isspace(*p)) {
> + while (av_isspace(p[1])) p++;
> + shlim(f, 0);
> + while (av_isspace(shgetc(f)));
> + shunget(f);
> + pos += shcnt(f);
> + continue;
> + }
> + if (*p != '%' || p[1] == '%') {
> + shlim(f, 0);
> + if (*p == '%') {
> + p++;
> + while (av_isspace((c=shgetc(f))));
> + } else {
> + c = shgetc(f);
> + }
> + if (c!=*p) {
> + shunget(f);
> + if (c<0) goto input_fail;
> + goto match_fail;
> + }
> + pos += shcnt(f);
> + continue;
> + }
> +
> + p++;
> + if (*p=='*') {
> + dest = 0; p++;
> + } else if (av_isdigit(*p) && p[1]=='$') {
> + dest = arg_n(ap, *p-'0'); p+=2;
> + } else {
> + dest = va_arg(ap, void *);
> + }
> +
> + for (width=0; av_isdigit(*p); p++) {
> + width = 10*width + *p - '0';
> + }
> +
> + if (*p=='m') {
> + s = 0;
> + p++;
> + }
> +
> + size = SIZE_def;
> + switch (*p++) {
> + case 'h':
> + if (*p == 'h') p++, size = SIZE_hh;
> + else size = SIZE_h;
> + break;
> + case 'l':
> + if (*p == 'l') p++, size = SIZE_ll;
> + else size = SIZE_l;
> + break;
> + case 'j':
> + size = SIZE_ll;
> + break;
> + case 'z':
> + case 't':
> + size = SIZE_l;
> + break;
> + case 'L':
> + size = SIZE_L;
> + break;
> + case 'd': case 'i': case 'o': case 'u': case 'x':
> + case 'a': case 'e': case 'f': case 'g':
> + case 'A': case 'E': case 'F': case 'G': case 'X':
> + case 's': case 'c': case '[':
> + case 'S': case 'C':
> + case 'p': case 'n':
> + p--;
> + break;
> + default:
> + goto fmt_fail;
> + }
> +
> + t = *p;
> +
> + /* C or S */
> + if ((t&0x2f) == 3) {
> + t |= 32;
> + size = SIZE_l;
> + }
> +
> + switch (t) {
> + case 'c':
> + if (width < 1) width = 1;
> + case '[':
> + break;
> + case 'n':
> + store_int(dest, size, pos);
> + /* do not increment match count, etc! */
> + continue;
> + default:
> + shlim(f, 0);
> + while (av_isspace(shgetc(f)));
> + shunget(f);
> + pos += shcnt(f);
> + }
> +
> + shlim(f, width);
> + if (shgetc(f) < 0) goto input_fail;
> + shunget(f);
> +
> + switch (t) {
> + case 's':
> + case 'c':
> + case '[':
> + if (t == 'c' || t == 's') {
> + memset(scanset, -1, sizeof scanset);
> + scanset[0] = 0;
> + if (t == 's') {
> + scanset[1+'\t'] = 0;
> + scanset[1+'\n'] = 0;
> + scanset[1+'\v'] = 0;
> + scanset[1+'\f'] = 0;
> + scanset[1+'\r'] = 0;
> + scanset[1+' '] = 0;
> + }
> + } else {
> + if (*++p == '^') p++, invert = 1;
> + else invert = 0;
> + memset(scanset, invert, sizeof scanset);
> + scanset[0] = 0;
> + if (*p == '-') p++, scanset[1+'-'] = 1-invert;
> + else if (*p == ']') p++, scanset[1+']'] = 1-invert;
> + for (; *p != ']'; p++) {
> + if (!*p) goto fmt_fail;
> + if (*p=='-' && p[1] && p[1] != ']')
> + for (c=p++[-1]; c<*p; c++)
> + scanset[1+c] = 1-invert;
> + scanset[1+*p] = 1-invert;
> + }
> + }
> + s = 0;
> + i = 0;> + k = t=='c' ? width+1U : 31; k is set but not used [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Observe your enemies, for they first find out your faults. -- Antisthenes
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