diff options
Diffstat (limited to 'src/basic')
| -rw-r--r-- | src/basic/util.c | 139 |
1 files changed, 50 insertions, 89 deletions
diff --git a/src/basic/util.c b/src/basic/util.c index 3989b415fa..d782bc6bdd 100644 --- a/src/basic/util.c +++ b/src/basic/util.c @@ -5815,16 +5815,10 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra size_t allocated = 0, sz = 0; int r; - enum { - START, - VALUE, - VALUE_ESCAPE, - SINGLE_QUOTE, - SINGLE_QUOTE_ESCAPE, - DOUBLE_QUOTE, - DOUBLE_QUOTE_ESCAPE, - SEPARATOR, - } state = START; + char quote = 0; /* 0 or ' or " */ + bool backslash = false; /* whether we've just seen a backslash */ + bool separator = false; /* whether we've just seen a separator */ + bool start = true; /* false means we're looking at a value */ assert(p); assert(ret); @@ -5844,9 +5838,7 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra for (;;) { char c = **p; - switch (state) { - - case START: + if (start) { if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) if (!GREEDY_REALLOC(s, allocated, sz+1)) return -ENOMEM; @@ -5854,11 +5846,10 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra if (c == 0) goto finish_force_terminate; else if (strchr(separators, c)) { - if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) { - (*p) ++; + (*p) ++; + if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) goto finish_force_next; - } - break; + continue; } /* We found a non-blank character, so we will always @@ -5867,78 +5858,16 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra if (!GREEDY_REALLOC(s, allocated, sz+1)) return -ENOMEM; - state = VALUE; - /* fallthrough */ - - case VALUE: - if (c == 0) - goto finish_force_terminate; - else if (c == '\'' && (flags & EXTRACT_QUOTES)) - state = SINGLE_QUOTE; - else if (c == '\\') - state = VALUE_ESCAPE; - else if (c == '\"' && (flags & EXTRACT_QUOTES)) - state = DOUBLE_QUOTE; - else if (strchr(separators, c)) { - if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) { - (*p) ++; - goto finish_force_next; - } - state = SEPARATOR; - } else { - if (!GREEDY_REALLOC(s, allocated, sz+2)) - return -ENOMEM; - - s[sz++] = c; - } - - break; - - case SINGLE_QUOTE: - if (c == 0) { - if (flags & EXTRACT_RELAX) - goto finish_force_terminate; - return -EINVAL; - } else if (c == '\'') - state = VALUE; - else if (c == '\\') - state = SINGLE_QUOTE_ESCAPE; - else { - if (!GREEDY_REALLOC(s, allocated, sz+2)) - return -ENOMEM; - - s[sz++] = c; - } - - break; - - case DOUBLE_QUOTE: - if (c == 0) { - if (flags & EXTRACT_RELAX) - goto finish_force_terminate; - return -EINVAL; - } else if (c == '\"') - state = VALUE; - else if (c == '\\') - state = DOUBLE_QUOTE_ESCAPE; - else { - if (!GREEDY_REALLOC(s, allocated, sz+2)) - return -ENOMEM; - - s[sz++] = c; - } - - break; + start = false; + } - case SINGLE_QUOTE_ESCAPE: - case DOUBLE_QUOTE_ESCAPE: - case VALUE_ESCAPE: + if (backslash) { if (!GREEDY_REALLOC(s, allocated, sz+7)) return -ENOMEM; if (c == 0) { if ((flags & EXTRACT_CUNESCAPE_RELAX) && - (state == VALUE_ESCAPE || flags & EXTRACT_RELAX)) { + (!quote || flags & EXTRACT_RELAX)) { /* If we find an unquoted trailing backslash and we're in * EXTRACT_CUNESCAPE_RELAX mode, keep it verbatim in the * output. @@ -5977,17 +5906,49 @@ int extract_first_word(const char **p, char **ret, const char *separators, Extra s[sz++] = c; end_escape: - state = (state == SINGLE_QUOTE_ESCAPE) ? SINGLE_QUOTE : - (state == DOUBLE_QUOTE_ESCAPE) ? DOUBLE_QUOTE : - VALUE; - break; + backslash = false; + + } else if (quote) { /* inside either single or double quotes */ + if (c == 0) { + if (flags & EXTRACT_RELAX) + goto finish_force_terminate; + return -EINVAL; + } else if (c == quote) /* found the end quote */ + quote = 0; + else if (c == '\\') + backslash = true; + else { + if (!GREEDY_REALLOC(s, allocated, sz+2)) + return -ENOMEM; + + s[sz++] = c; + } - case SEPARATOR: + } else if (separator) { if (c == 0) goto finish_force_terminate; if (!strchr(separators, c)) goto finish; - break; + + } else { + if (c == 0) + goto finish_force_terminate; + else if ((c == '\'' || c == '"') && (flags & EXTRACT_QUOTES)) + quote = c; + else if (c == '\\') + backslash = true; + else if (strchr(separators, c)) { + if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) { + (*p) ++; + goto finish_force_next; + } + separator = true; + } else { + if (!GREEDY_REALLOC(s, allocated, sz+2)) + return -ENOMEM; + + s[sz++] = c; + } } (*p) ++; |