diff options
Diffstat (limited to 'mimehead.c')
| -rw-r--r-- | mimehead.c | 61 |
1 files changed, 47 insertions, 14 deletions
@@ -64,12 +64,22 @@ ha2d(char x, char y) Str decodeB(char **ww) { + struct growbuf gb; + + growbuf_init(&gb); + decodeB_to_growbuf(&gb, ww); + return growbuf_to_Str(&gb); +} + +void +decodeB_to_growbuf(struct growbuf *gb, char **ww) +{ unsigned char c[4]; char *wp = *ww; char d[3]; int i, n_pad; - Str ap = Strnew_size(strlen(wp)); + growbuf_reserve(gb, strlen(wp) + 1); n_pad = 0; while (1) { for (i = 0; i < 4; i++) { @@ -93,39 +103,50 @@ decodeB(char **ww) for (i = 0; i < 4; i++) { c[i] = c2e(c[i]); if (c[i] == BAD_BASE64) { - *ww = wp; - return ap; + goto last; } } d[0] = ((c[0] << 2) | (c[1] >> 4)); d[1] = ((c[1] << 4) | (c[2] >> 2)); d[2] = ((c[2] << 6) | c[3]); for (i = 0; i < 3 - n_pad; i++) { - Strcat_char(ap, d[i]); + GROWBUF_ADD_CHAR(gb, d[i]); } if (n_pad || *wp == '\0' || *wp == '?') break; } +last: + growbuf_reserve(gb, gb->length + 1); + gb->ptr[gb->length] = '\0'; *ww = wp; - return ap; + return; } Str decodeU(char **ww) { + struct growbuf gb; + + growbuf_init(&gb); + decodeU_to_growbuf(&gb, ww); + return growbuf_to_Str(&gb); +} + +void +decodeU_to_growbuf(struct growbuf *gb, char **ww) +{ unsigned char c1, c2; char *w = *ww; int n, i; - Str a; if (*w <= 0x20 || *w >= 0x60) - return Strnew_size(0); + return; n = *w - 0x20; - a = Strnew_size(n); + growbuf_reserve(gb, n + 1); for (w++, i = 2; *w != '\0' && n; n--) { c1 = (w[0] - 0x20) % 0x40; c2 = (w[1] - 0x20) % 0x40; - Strcat_char(a, (c1 << i) | (c2 >> (6 - i))); + gb->ptr[gb->length++] = (c1 << i) | (c2 >> (6 - i)); if (i == 6) { w += 2; i = 2; @@ -135,7 +156,8 @@ decodeU(char **ww) i += 2; } } - return a; + gb->ptr[gb->length] = '\0'; + return; } /* RFC2047 (4.2. The "Q" encoding) */ @@ -165,9 +187,19 @@ decodeQ(char **ww) Str decodeQP(char **ww) { + struct growbuf gb; + + growbuf_init(&gb); + decodeQP_to_growbuf(&gb, ww); + return growbuf_to_Str(&gb); +} + +void +decodeQP_to_growbuf(struct growbuf *gb, char **ww) +{ char *w = *ww; - Str a = Strnew_size(strlen(w)); + growbuf_reserve(gb, strlen(w) + 1); for (; *w != '\0'; w++) { if (*w == '=') { w++; @@ -180,15 +212,16 @@ decodeQP(char **ww) else { if (*w == '\0' || *(w + 1) == '\0') break; - Strcat_char(a, ha2d(*w, *(w + 1))); + gb->ptr[gb->length++] = ha2d(*w, *(w + 1)); w++; } } else - Strcat_char(a, *w); + gb->ptr[gb->length++] = *w; } + gb->ptr[gb->length] = '\0'; *ww = w; - return a; + return; } #ifdef USE_M17N |