version 1.22, 2010/12/07 00:08:52 |
version 1.23, 2010/12/09 20:56:30 |
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static int |
static int |
roff_res(struct roff *r, char **bufp, size_t *szp, int pos) |
roff_res(struct roff *r, char **bufp, size_t *szp, int pos) |
{ |
{ |
const char *cp, *cpp, *st, *res; |
const char *stesc; /* start of an escape sequence ('\\') */ |
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const char *stnam; /* start of the name, after "[(*" */ |
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const char *cp; /* end of the name, e.g. before ']' */ |
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const char *res; /* the string to be substituted */ |
int i, maxl; |
int i, maxl; |
size_t nsz; |
size_t nsz; |
char *n; |
char *n; |
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/* LINTED */ |
/* String escape sequences have at least three characters. */ |
for (cp = &(*bufp)[pos]; (cpp = strstr(cp, "\\*")); cp++) { |
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cp = cpp + 2; |
for (cp = *bufp + pos; cp[0] && cp[1] && cp[2]; cp++) { |
switch (*cp) { |
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/* |
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* The first character must be a backslash. |
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* Save a pointer to it. |
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*/ |
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if ('\\' != *cp) |
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continue; |
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stesc = cp; |
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/* |
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* The second character must be an asterisk. |
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* If it isn't, skip it anyway: It is escaped, |
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* so it can't start another escape sequence. |
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*/ |
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if ('*' != *(++cp)) |
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continue; |
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/* |
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* The third character decides the length |
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* of the name of the string. |
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* Save a pointer to the name. |
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*/ |
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switch (*(++cp)) { |
case ('('): |
case ('('): |
cp++; |
cp++; |
maxl = 2; |
maxl = 2; |
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maxl = 1; |
maxl = 1; |
break; |
break; |
} |
} |
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stnam = cp; |
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st = cp; |
/* Advance to the end of the name. */ |
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for (i = 0; 0 == maxl || i < maxl; i++, cp++) { |
for (i = 0; 0 == maxl || i < maxl; i++, cp++) { |
if ('\0' == *cp) |
if ('\0' == *cp) |
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break; |
break; |
} |
} |
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res = roff_getstrn(r, st, (size_t)i); |
/* |
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* Retrieve the replacement string; if it is |
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* undefined, resume searching for escapes. |
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*/ |
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res = roff_getstrn(r, stnam, (size_t)i); |
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if (NULL == res) { |
if (NULL == res) { |
cp -= maxl ? 1 : 0; |
cp -= maxl ? 1 : 0; |
continue; |
continue; |
} |
} |
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/* Replace the escape sequence by the string. */ |
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nsz = *szp + strlen(res) + 1; |
nsz = *szp + strlen(res) + 1; |
n = mandoc_malloc(nsz); |
n = mandoc_malloc(nsz); |
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*n = '\0'; |
strlcpy(n, *bufp, (size_t)(stesc - *bufp + 1)); |
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strlcat(n, *bufp, (size_t)(cpp - *bufp + 1)); |
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strlcat(n, res, nsz); |
strlcat(n, res, nsz); |
strlcat(n, cp + (maxl ? 0 : 1), nsz); |
strlcat(n, cp + (maxl ? 0 : 1), nsz); |
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case (ROFF_am1): |
case (ROFF_am1): |
/* FALLTHROUGH */ |
/* FALLTHROUGH */ |
case (ROFF_de): |
case (ROFF_de): |
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/* ROFF_de1 is remapped to ROFF_de in roff_block(). */ |
/* FALLTHROUGH */ |
/* FALLTHROUGH */ |
case (ROFF_dei): |
case (ROFF_dei): |
/* FALLTHROUGH */ |
/* FALLTHROUGH */ |