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96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
// small test unit for mish_argv_make
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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typedef struct _mish_argv_t {
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char * line;
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int ac;
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char * av[0];
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} _mish_argv_t;
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/*
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* Duplicate 'line', split it into words, store word pointers in an array,
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* NULL terminate it. Also return the number of words in the array in argc.
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*
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* The returned value is made of two malloc()ed blocks. use mish_argv_free
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* to free the memory.
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* It's OK to change any of the pointers. But no not try to realloc() the
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* vector as it hides a structure
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*/
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static char **
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mish_argv_make(
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const char * line,
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int * argc )
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{
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const char separator = ' ';
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_mish_argv_t * r = calloc(1, sizeof(*r));
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r->line = strdup(line);
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char *dup = r->line;
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char quote;
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enum { s_newarg = 0, s_startarg, s_copyquote, s_skip, s_copy };
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int state = s_newarg;
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do {
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switch (state) {
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case s_newarg:
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r = realloc(r, sizeof(*r) + ((r->ac + 2) * sizeof(char*)));
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while (*dup == ' ' || *dup == separator)
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dup++;
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r->av[r->ac++] = dup;
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state = s_startarg;
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break;
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case s_startarg:
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if (*dup == '"' || *dup == '\'') {
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quote = *dup++;
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state = s_copyquote;
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} else
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state = s_copy;
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break;
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case s_copyquote:
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if (*dup == '\\')
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state = s_skip;
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else if (*dup == quote) {
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state = s_newarg;
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dup++;
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if (*dup) *dup++ = 0;
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} else if (*dup)
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dup++;
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break;
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case s_skip:
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dup++;
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state = s_copyquote;
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break;
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case s_copy:
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if (*dup == 0)
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break;
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if (*dup != separator)
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dup++;
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else {
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state = s_newarg;
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if (*dup) *dup++ = 0;
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}
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break;
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}
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} while (*dup);
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r->av[r->ac] = NULL;
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if (argc)
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*argc = r->ac;
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return r->av;
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}
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int main() {
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int argc = 0;
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char **argv = mish_argv_make("testing \"one escape two\" lala ", &argc);
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printf("argc = %d\n", argc);
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for (int i = 0; argv[i]; i++)
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printf("%2d:'%s'\n", i, argv[i]);
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argv = mish_argv_make("command with some \" quoted\\\"words \" should work\n", &argc);
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printf("argc = %d\n", argc);
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for (int i = 0; argv[i]; i++)
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printf("%2d:'%s'\n", i, argv[i]);
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}
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