From 378c18e5f024ac5a8aef4cb40d7c9aa9633d144c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:30:35 +0200 Subject: Adding upstream version 2.38.1. Signed-off-by: Daniel Baumann --- text-utils/hexdump-parse.c | 649 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 649 insertions(+) create mode 100644 text-utils/hexdump-parse.c (limited to 'text-utils/hexdump-parse.c') diff --git a/text-utils/hexdump-parse.c b/text-utils/hexdump-parse.c new file mode 100644 index 0000000..0ceff8f --- /dev/null +++ b/text-utils/hexdump-parse.c @@ -0,0 +1,649 @@ +/* + * Copyright (c) 1989 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + + /* 1999-02-22 Arkadiusz Miśkiewicz + * - added Native Language Support + */ + +#include +#include +#include +#include +#include +#include +#include "hexdump.h" +#include "nls.h" +#include "xalloc.h" +#include "strutils.h" +#include "colors.h" + +static void escape(char *p1); +static struct list_head *color_fmt(char *cfmt, int bcnt); + +static void __attribute__ ((__noreturn__)) badcnt(const char *s) +{ + errx(EXIT_FAILURE, _("bad byte count for conversion character %s"), s); +} + +static void __attribute__ ((__noreturn__)) badsfmt(void) +{ + errx(EXIT_FAILURE, _("%%s requires a precision or a byte count")); +} + +static void __attribute__ ((__noreturn__)) badfmt(const char *fmt) +{ + errx(EXIT_FAILURE, _("bad format {%s}"), fmt); +} + +static void __attribute__ ((__noreturn__)) badconv(const char *ch) +{ + errx(EXIT_FAILURE, _("bad conversion character %%%s"), ch); +} + +#define first_letter(s,f) strchr(f, *(s)) + +struct hexdump_fu *endfu; /* format at end-of-data */ + +void addfile(char *name, struct hexdump *hex) +{ + char *fmt, *buf = NULL; + FILE *fp; + size_t n = 0; + + if ((fp = fopen(name, "r")) == NULL) + err(EXIT_FAILURE, _("can't read %s"), name); + + while (getline(&buf, &n, fp) != -1) { + fmt = buf; + + while (*fmt && isspace(*fmt)) + ++fmt; + if (!*fmt || *fmt == '#') + continue; + + add_fmt(fmt, hex); + } + + free(buf); + fclose(fp); +} + +static char *next_number(const char *str, int *num) +{ + char *end = NULL; + + errno = 0; + *num = strtol(str, &end, 10); + + if (errno || !end || end == str) + return NULL; + return end; +} + +void add_fmt(const char *fmt, struct hexdump *hex) +{ + const char *p, *savep; + struct hexdump_fs *tfs; + struct hexdump_fu *tfu; + + /* Start new linked list of format units. */ + tfs = xcalloc(1, sizeof(struct hexdump_fs)); + INIT_LIST_HEAD(&tfs->fslist); + INIT_LIST_HEAD(&tfs->fulist); + list_add_tail(&tfs->fslist, &hex->fshead); + + /* Take the format string and break it up into format units. */ + p = fmt; + while (TRUE) { + /* Skip leading white space. */ + if (!*(p = skip_space(p))) + break; + + /* Allocate a new format unit and link it in. */ + tfu = xcalloc(1, sizeof(struct hexdump_fu)); + tfu->reps = 1; + + INIT_LIST_HEAD(&tfu->fulist); + INIT_LIST_HEAD(&tfu->prlist); + list_add_tail(&tfu->fulist, &tfs->fulist); + + /* If leading digit, repetition count. */ + if (isdigit(*p)) { + p = next_number(p, &tfu->reps); + if (!p || (!isspace(*p) && *p != '/')) + badfmt(fmt); + + /* may overwrite either white space or slash */ + tfu->flags = F_SETREP; + /* skip trailing white space */ + p = skip_space(++p); + } + + /* Skip slash and trailing white space. */ + if (*p == '/') + p = skip_space(++p); + + /* byte count */ + if (isdigit(*p)) { + p = next_number(p, &tfu->bcnt); + if (!p || !isspace(*p)) + badfmt(fmt); + /* skip trailing white space */ + p = skip_space(++p); + } + + /* format */ + if (*p != '"') + badfmt(fmt); + savep = ++p; + while (*p != '"') { + if (!*p++) + badfmt(fmt); + } + tfu->fmt = xmalloc(p - savep + 1); + xstrncpy(tfu->fmt, savep, p - savep + 1); + escape(tfu->fmt); + ++p; + } +} + +static const char *spec = ".#-+ 0123456789"; + +int block_size(struct hexdump_fs *fs) +{ + struct hexdump_fu *fu; + int bcnt, prec, cursize = 0; + char *fmt; + struct list_head *p; + + /* figure out the data block size needed for each format unit */ + list_for_each (p, &fs->fulist) { + fu = list_entry(p, struct hexdump_fu, fulist); + if (fu->bcnt) { + cursize += fu->bcnt * fu->reps; + continue; + } + bcnt = prec = 0; + fmt = fu->fmt; + while (*fmt) { + if (*fmt != '%') { + ++fmt; + continue; + } + /* + * skip any special chars -- save precision in + * case it's a %s format. + */ + while (strchr(spec + 1, *++fmt)) + ; + if (*fmt == '.' && isdigit(*++fmt)) + fmt = next_number(fmt, &prec); + if (first_letter(fmt, "diouxX")) + bcnt += 4; + else if (first_letter(fmt, "efgEG")) + bcnt += 8; + else if (*fmt == 's') + bcnt += prec; + else if (*fmt == 'c' || (*fmt == '_' && first_letter(++fmt, "cpu"))) + ++bcnt; + ++fmt; + } + cursize += bcnt * fu->reps; + } + return(cursize); +} + +void rewrite_rules(struct hexdump_fs *fs, struct hexdump *hex) +{ + enum { NOTOKAY, USEBCNT, USEPREC } sokay; + struct hexdump_pr *pr; + struct hexdump_fu *fu; + struct list_head *p, *q; + char *p1, *p2, *fmtp; + char savech, cs[4]; + int nconv, prec = 0; + + list_for_each (p, &fs->fulist) { + fu = list_entry(p, struct hexdump_fu, fulist); + /* + * Break each format unit into print units; each + * conversion character gets its own. + */ + nconv = 0; + fmtp = fu->fmt; + while (*fmtp) { + pr = xcalloc(1, sizeof(struct hexdump_pr)); + INIT_LIST_HEAD(&pr->prlist); + list_add_tail(&pr->prlist, &fu->prlist); + + /* Skip preceding text and up to the next % sign. */ + p1 = fmtp; + while (*p1 && *p1 != '%') + ++p1; + + /* Only text in the string. */ + if (!*p1) { + pr->fmt = xstrdup(fmtp); + pr->flags = F_TEXT; + break; + } + + /* + * Get precision for %s -- if have a byte count, don't + * need it. + */ + if (fu->bcnt) { + sokay = USEBCNT; + /* skip to conversion character */ + for (p1++; strchr(spec, *p1); p1++) + ; + } else { + /* skip any special chars, field width */ + while (strchr(spec + 1, *++p1)) + ; + if (*p1 == '.' && isdigit(*++p1)) { + sokay = USEPREC; + p1 = next_number(p1, &prec); + } else + sokay = NOTOKAY; + } + + p2 = p1 + 1; /* Set end pointer. */ + cs[0] = *p1; /* Set conversion string. */ + cs[1] = 0; + + /* + * Figure out the byte count for each conversion; + * rewrite the format as necessary, set up blank- + * padding for end of data. + */ + if (*cs == 'c') { + pr->flags = F_CHAR; + switch(fu->bcnt) { + case 0: + case 1: + pr->bcnt = 1; + break; + default: + p1[1] = '\0'; + badcnt(p1); + } + } else if (first_letter(cs, "di")) { + pr->flags = F_INT; + goto isint; + } else if (first_letter(cs, "ouxX")) { + pr->flags = F_UINT; +isint: cs[3] = '\0'; + cs[2] = cs[0]; + cs[1] = 'l'; + cs[0] = 'l'; + switch(fu->bcnt) { + case 0: + pr->bcnt = 4; + break; + case 1: + case 2: + case 4: + case 8: + pr->bcnt = fu->bcnt; + break; + default: + p1[1] = '\0'; + badcnt(p1); + } + } else if (first_letter(cs, "efgEG")) { + pr->flags = F_DBL; + switch(fu->bcnt) { + case 0: + pr->bcnt = 8; + break; + case 4: + case 8: + pr->bcnt = fu->bcnt; + break; + default: + p1[1] = '\0'; + badcnt(p1); + } + } else if(*cs == 's') { + pr->flags = F_STR; + switch(sokay) { + case NOTOKAY: + badsfmt(); + case USEBCNT: + pr->bcnt = fu->bcnt; + break; + case USEPREC: + pr->bcnt = prec; + break; + } + } else if (*cs == '_') { + ++p2; + switch(p1[1]) { + case 'A': + endfu = fu; + fu->flags |= F_IGNORE; + /* fallthrough */ + case 'a': + pr->flags = F_ADDRESS; + ++p2; + if (first_letter(p1 + 2, "dox")) { + cs[0] = 'l'; + cs[1] = 'l'; + cs[2] = p1[2]; + cs[3] = '\0'; + } else { + p1[3] = '\0'; + badconv(p1); + } + break; + case 'c': + pr->flags = F_C; + /* cs[0] = 'c'; set in conv_c */ + goto isint2; + case 'p': + pr->flags = F_P; + cs[0] = 'c'; + goto isint2; + case 'u': + pr->flags = F_U; + /* cs[0] = 'c'; set in conv_u */ + isint2: switch(fu->bcnt) { + case 0: + case 1: + pr->bcnt = 1; + break; + default: + p1[2] = '\0'; + badcnt(p1); + } + break; + default: + p1[2] = '\0'; + badconv(p1); + } + } else { + p1[1] = '\0'; + badconv(p1); + } + + /* Color unit(s) specified */ + if (*p2 == '_' && p2[1] == 'L') { + if (colors_wanted()) { + char *a; + + /* "cut out" the color_unit(s) */ + a = strchr(p2, '['); + p2 = strrchr(p2, ']'); + if (a++ && p2) + pr->colorlist = color_fmt(xstrndup(a, p2++ - a), pr->bcnt); + else + badconv(p2); + } + /* we don't want colors, quietly skip over them */ + else { + p2 = strrchr(p2, ']'); + /* be a bit louder if we don't know how to skip over them */ + if (!p2) + badconv("_L"); + ++p2; + } + } + /* + * Copy to hexdump_pr format string, set conversion character + * pointer, update original. + */ + savech = *p2; + p1[0] = '\0'; + pr->fmt = xmalloc(strlen(fmtp) + strlen(cs) + 1); + strcpy(pr->fmt, fmtp); + strcat(pr->fmt, cs); + *p2 = savech; + pr->cchar = pr->fmt + (p1 - fmtp); + fmtp = p2; + + /* Only one conversion character if byte count */ + if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++) + errx(EXIT_FAILURE, + _("byte count with multiple conversion characters")); + } + /* + * If format unit byte count not specified, figure it out + * so can adjust rep count later. + */ + if (!fu->bcnt) + list_for_each(q, &fu->prlist) + fu->bcnt + += (list_entry(q, struct hexdump_pr, prlist))->bcnt; + } + /* + * If the format string interprets any data at all, and it's + * not the same as the blocksize, and its last format unit + * interprets any data at all, and has no iteration count, + * repeat it as necessary. + * + * If rep count is greater than 1, no trailing whitespace + * gets output from the last iteration of the format unit. + */ + list_for_each (p, &fs->fulist) { + fu = list_entry(p, struct hexdump_fu, fulist); + + if (list_entry_is_last(&fu->fulist, &fs->fulist) && + fs->bcnt < hex->blocksize && + !(fu->flags&F_SETREP) && fu->bcnt) + fu->reps += (hex->blocksize - fs->bcnt) / fu->bcnt; + if (fu->reps > 1 && !list_empty(&fu->prlist)) { + pr = list_last_entry(&fu->prlist, struct hexdump_pr, prlist); + if (!pr) + continue; + for (p1 = pr->fmt, p2 = NULL; *p1; ++p1) + p2 = isspace(*p1) ? p1 : NULL; + if (p2) + pr->nospace = p2; + } + } +} + +/* [!]color[:string|:hex_number|:oct_number][@offt|@offt_start-offt_end],... */ +static struct list_head *color_fmt(char *cfmt, int bcnt) +{ + struct hexdump_clr *hc, *hcnext; + struct list_head *ret_head; + char *clr, *fmt; + + ret_head = xmalloc(sizeof(struct list_head)); + hcnext = hc = xcalloc(1, sizeof(struct hexdump_clr)); + + INIT_LIST_HEAD(&hc->colorlist); + INIT_LIST_HEAD(ret_head); + list_add_tail(&hc->colorlist, ret_head); + + fmt = cfmt; + while (cfmt && *cfmt) { + char *end; + /* invert this condition */ + if (*cfmt == '!') { + hcnext->invert = 1; + ++cfmt; + } + + clr = xstrndup(cfmt, strcspn(cfmt, ":@,")); + cfmt += strlen(clr); + hcnext->fmt = color_sequence_from_colorname(clr); + free(clr); + + if (!hcnext->fmt) + return NULL; + + /* only colorize this specific value */ + if (*cfmt == ':') { + ++cfmt; + /* a hex or oct value */ + if (*cfmt == '0') { + /* hex */ + errno = 0; + end = NULL; + if (cfmt[1] == 'x' || cfmt[1] == 'X') + hcnext->val = strtoul(cfmt + 2, &end, 16); + else + hcnext->val = strtoul(cfmt, &end, 8); + if (errno || end == cfmt) + badfmt(fmt); + cfmt = end; + /* a string */ + } else { + off_t fmt_end; + char endchar; + char *endstr; + + hcnext->val = -1; + /* temporarily null-delimit the format, so we can reverse-search + * for the start of an offset specifier */ + fmt_end = strcspn(cfmt, ","); + endchar = cfmt[fmt_end]; + cfmt[fmt_end] = '\0'; + endstr = strrchr(cfmt, '@'); + + if (endstr) { + if (endstr[1] != '\0') + --endstr; + hcnext->str = xstrndup(cfmt, endstr - cfmt + 1); + } else + hcnext->str = xstrndup(cfmt, fmt_end); + + /* restore the character */ + cfmt[fmt_end] = endchar; + cfmt += strlen(hcnext->str); + } + + /* no specific value */ + } else + hcnext->val = -1; + + /* only colorize at this offset */ + hcnext->range = bcnt; + if (cfmt && *cfmt == '@') { + errno = 0; + hcnext->offt = strtoul(++cfmt, &cfmt, 10); + if (errno) + badfmt(fmt); + + /* offset range */ + if (*cfmt == '-') { + ++cfmt; + errno = 0; + + hcnext->range = + strtoul(cfmt, &cfmt, 10) - hcnext->offt + 1; + if (errno) + badfmt(fmt); + /* offset range must be between 0 and format byte count */ + if (hcnext->range < 0) + badcnt("_L"); + /* the offset extends over several print units, clone + * the condition, link it in and adjust the address/offset */ + while (hcnext->range > bcnt) { + hc = xcalloc(1, sizeof(struct hexdump_clr)); + memcpy(hc, hcnext, sizeof(struct hexdump_clr)); + + hc->range = bcnt; + + INIT_LIST_HEAD(&hc->colorlist); + list_add_tail(&hc->colorlist, ret_head); + + hcnext->offt += bcnt; + hcnext->range -= bcnt; + } + } + /* no specific offset */ + } else + hcnext->offt = (off_t)-1; + + /* check if the string we're looking for is the same length as the range */ + if (hcnext->str && (int)strlen(hcnext->str) != hcnext->range) + badcnt("_L"); + + /* link in another condition */ + if (cfmt && *cfmt == ',') { + ++cfmt; + + hcnext = xcalloc(1, sizeof(struct hexdump_clr)); + INIT_LIST_HEAD(&hcnext->colorlist); + list_add_tail(&hcnext->colorlist, ret_head); + } + } + return ret_head; +} + +static void escape(char *p1) +{ + char *p2; + + /* alphabetic escape sequences have to be done in place */ + p2 = p1; + while (TRUE) { + if (!*p1) { + *p2 = *p1; + break; + } + if (*p1 == '\\') + switch(*++p1) { + case 'a': + /* *p2 = '\a'; */ + *p2 = '\007'; + break; + case 'b': + *p2 = '\b'; + break; + case 'f': + *p2 = '\f'; + break; + case 'n': + *p2 = '\n'; + break; + case 'r': + *p2 = '\r'; + break; + case 't': + *p2 = '\t'; + break; + case 'v': + *p2 = '\v'; + break; + default: + *p2 = *p1; + break; + } + ++p1; ++p2; + } +} -- cgit v1.2.3